Table of SynGAP1 Isoform α2 (UniProt Q96PV0-1) Missense Variants.

c.dna	Variant	SGM Consensus	Domain	ClinVar			gnomAD			ESM1b		AlphaMissense			REVEL		FoldX			Rosetta		Foldetta		PremPS		PROVEAN		PolyPhen-2 HumDiv		PolyPhen-2 HumVar		FATHMM		SIFT				PAM		Physical		SASA		Normalized B-factor backbone		Normalized B-factor sidechain		SynGAP Structural Annotation									DOI
				Clinical Status	Review	Subm.	ID	Allele count	Allele freq.	LLR score	Prediction	Pathogenicity	Class	Optimized	Score	Prediction	Average ΔΔG	Prediction	StdDev	ΔΔG	Prediction	ΔΔG	Prediction	ΔΔG	Prediction	Score	Prediction	pph2_prob	Prediction	pph2_prob	Prediction	Nervous System Score	Prediction	Prediction	Status	Conservation	Sequences	PAM250	PAM120	Hydropathy Δ	MW Δ	Average	Δ	Δ	StdDev	Δ	StdDev	Secondary	Tertiary bonds	Inside out	GAP-Ras interface	At membrane	No effect	MD Alert	Verdict	Description
c.1147G>T	G383W (3D Viewer)		C2	Uncertain		1	6-33438052-G-T	1	6.22e-7	-10.161	Likely Pathogenic	0.439	Ambiguous	Likely Benign	0.469	Likely Benign	5.81	Destabilizing	3.6	4.44	Destabilizing	5.13	Destabilizing	0.08	Likely Benign	-1.01	Neutral	0.959	Probably Damaging	0.704	Possibly Damaging	4.09	Benign	0.00	Affected	4.32	7	-2	-7	-0.5	129.16
c.1003C>T	R335C (3D Viewer)	Likely Pathogenic	C2	Uncertain		1	6-33437908-C-T	1	6.20e-7	-14.354	Likely Pathogenic	0.938	Likely Pathogenic	Ambiguous	0.277	Likely Benign	0.53	Ambiguous	0.1	0.85	Ambiguous	0.69	Ambiguous	0.46	Likely Benign	-5.69	Deleterious	1.000	Probably Damaging	0.998	Probably Damaging	1.67	Pathogenic	0.01	Affected	3.38	22	-3	-4	7.0	-53.05
c.1513T>G	Y505D (3D Viewer)	Likely Pathogenic	GAP	Likely Pathogenic		1				-14.078	Likely Pathogenic	0.993	Likely Pathogenic	Likely Pathogenic	0.718	Likely Pathogenic	4.98	Destabilizing	0.1	4.72	Destabilizing	4.85	Destabilizing	2.49	Destabilizing	-9.95	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	2.60	Benign	0.00	Affected	3.37	35	-3	-4	-2.2	-48.09
c.1726T>C	C576R (3D Viewer)	Likely Pathogenic	GAP	Conflicting		2				-14.886	Likely Pathogenic	1.000	Likely Pathogenic	Likely Pathogenic	0.579	Likely Pathogenic	7.20	Destabilizing	1.0	4.09	Destabilizing	5.65	Destabilizing	1.64	Destabilizing	-10.88	Deleterious	0.999	Probably Damaging	0.996	Probably Damaging	3.38	Benign	0.00	Affected	3.37	35	-3	-4	-7.0	53.05
c.2560C>T	R854C	Likely Benign		Uncertain		1	6-33443112-C-T	3	1.86e-6	-5.082	Likely Benign	0.170	Likely Benign	Likely Benign	0.174	Likely Benign										-2.48	Neutral	1.000	Probably Damaging	0.947	Probably Damaging	4.05	Benign	0.01	Affected	3.88	3	-3	-4	7.0	-53.05
c.3307C>T	R1103C			Uncertain		1	6-33443859-C-T	6	3.92e-6	-2.440	Likely Benign	0.246	Likely Benign	Likely Benign	0.140	Likely Benign										-3.01	Deleterious	0.996	Probably Damaging	0.787	Possibly Damaging	2.41	Pathogenic	0.01	Affected	3.77	5	-3	-4	7.0	-53.05
c.772C>T	R258C (3D Viewer)	Likely Pathogenic	C2	Uncertain		1	6-33437677-C-T	1	6.20e-7	-10.285	Likely Pathogenic	0.790	Likely Pathogenic	Ambiguous	0.771	Likely Pathogenic	1.17	Ambiguous	0.4	1.76	Ambiguous	1.47	Ambiguous	0.87	Ambiguous	-6.79	Deleterious	1.000	Probably Damaging	0.993	Probably Damaging	5.77	Benign	0.00	Affected	3.39	15	-3	-4	7.0	-53.05
c.961C>T	R321C (3D Viewer)	Likely Pathogenic	C2	Conflicting		2	6-33437866-C-T	9	5.58e-6	-10.025	Likely Pathogenic	0.387	Ambiguous	Likely Benign	0.495	Likely Benign	0.57	Ambiguous	0.1	0.56	Ambiguous	0.57	Ambiguous	0.18	Likely Benign	-4.59	Deleterious	1.000	Probably Damaging	0.998	Probably Damaging	1.89	Pathogenic	0.01	Affected	3.38	23	-3	-4	7.0	-53.05
c.1058T>C	L353P (3D Viewer)	Likely Pathogenic	C2	Uncertain		1				-7.913	In-Between	0.936	Likely Pathogenic	Ambiguous	0.464	Likely Benign	4.63	Destabilizing	0.1	10.19	Destabilizing	7.41	Destabilizing	2.17	Destabilizing	-3.70	Deleterious	0.947	Possibly Damaging	0.454	Possibly Damaging	1.29	Pathogenic	0.02	Affected	3.37	25	-3	-3	-5.4	-16.04
c.1126G>T	G376C		C2	Uncertain		1				-7.686	In-Between	0.125	Likely Benign	Likely Benign	0.560	Likely Pathogenic	2.56	Destabilizing	0.5	0.22	Likely Benign	1.39	Ambiguous	0.16	Likely Benign	-1.15	Neutral	1.000	Probably Damaging	1.000	Probably Damaging	1.32	Pathogenic	0.01	Affected			-3	-3	2.9	46.09
c.113C>T	P38L	Likely Benign		Conflicting		4	6-33423522-C-T	8	4.96e-6	-2.469	Likely Benign	0.197	Likely Benign	Likely Benign	0.141	Likely Benign										-2.56	Deleterious	0.983	Probably Damaging	0.931	Probably Damaging	4.02	Benign	0.00	Affected	4.32	1	-3	-3	5.4	16.04
c.121C>T	R41C	Likely Benign		Conflicting		3	6-33423530-C-T	7	4.34e-6	-4.745	Likely Benign	0.207	Likely Benign	Likely Benign	0.093	Likely Benign										-1.10	Neutral	0.976	Probably Damaging	0.919	Probably Damaging	4.13	Benign	0.00	Affected	4.32	1	-4	-3	7.0	-53.05
c.1066C>T	R356C (3D Viewer)	Likely Pathogenic	C2	Likely Benign		1	6-33437971-C-T	5	3.10e-6	-11.827	Likely Pathogenic	0.774	Likely Pathogenic	Likely Benign	0.312	Likely Benign	0.76	Ambiguous	0.0	1.19	Ambiguous	0.98	Ambiguous	0.84	Ambiguous	-7.12	Deleterious	1.000	Probably Damaging	0.990	Probably Damaging	1.67	Pathogenic	0.00	Affected	3.39	22	-4	-3	7.0	-53.05	212.3	91.0	-0.1	0.3	-0.3	0.1		X						Potentially Pathogenic	Arg356 is located in a loop that includes a short helical section and connects two anti-parallel β sheet strands (res. Gly341-Pro349, res. Thr359-Pro364). In the WT simulations, the guanidinium group of Arg356 alternately forms salt bridges with the carboxylate groups of the GAP domain residues, Glu446 and Glu698. Arg356 also forms hydrogen bonds with the hydroxyl group of the GAP domain residue Thr691 and interacts with Met409 at the C2-GAP interface.In the variant simulations, the Cys356 mutation fails to maintain any of the Arg356 interactions and only occasionally forms weak hydrogen bonds with nearby C2 domain residues (e.g., Gln407). Although no negative structural effects are observed during the simulations, Arg356 is located at the C2 and GAP domain interface, making the residue swap potentially detrimental to the tertiary structure assembly.
c.1084T>C	W362R (3D Viewer)	Likely Pathogenic	C2	Pathogenic		2				-14.004	Likely Pathogenic	1.000	Likely Pathogenic	Likely Pathogenic	0.706	Likely Pathogenic	2.64	Destabilizing	0.3	3.90	Destabilizing	3.27	Destabilizing	1.10	Destabilizing	-12.87	Deleterious	0.999	Probably Damaging	0.996	Probably Damaging	1.28	Pathogenic	0.00	Affected	3.39	24	2	-3	-3.6	-30.03	287.5	-34.1	-0.2	0.1	-0.6	0.2	X			X			X	Potentially Pathogenic	The indole ring of Trp362, located on the surface of an anti-parallel β sheet (res. Thr359-Pro364) in the C2 domain, stacks with nearby residues (e.g., Arg401, Arg272). In the variant simulations, the guanidinium group of the introduced residue Arg362 forms a salt bridge with the carboxylate group of Glu273 and, like Trp362, stacks with other arginine residues (e.g., Arg401, Arg272). This residue is at both the C2-membrane interface and the C2-RasGTPase interface, so the residue swap could potentially affect both interactions. However, these phenomena cannot be addressed using solvent-only simulations. Notably, Arg272, which stacks with both the non-mutated Trp362 and the mutated Arg362, forms a salt bridge directly with Asp105 of Ras in the WT simulations. Therefore, the residue swap could affect the C2 domain stability, the SynGAP-membrane association, and the SynGAP-Ras association.	10.1016/j.ajhg.2020.11.011
c.1118G>T	G373V (3D Viewer)	Likely Benign	C2	Uncertain		1	6-33438023-G-T	6	5.03e-6	-6.062	Likely Benign	0.112	Likely Benign	Likely Benign	0.428	Likely Benign	5.32	Destabilizing	3.2	0.82	Ambiguous	3.07	Destabilizing	0.09	Likely Benign	-0.98	Neutral	0.007	Benign	0.001	Benign	3.90	Benign	0.00	Affected	3.53	16	-1	-3	4.6	42.08	207.6	-68.1	1.9	1.1	-0.6	0.1								Uncertain	Gly373 is located in the Gly-rich Ω loop (res. Pro364-Pro398) between two anti-parallel β sheet strands (res. Thr359-Pro364, res. Ala399-Ile411). Because the Ω loop is assumed to directly interact with the membrane, it moves arbitrarily throughout the WT solvent simulations. The Ω loop potentially plays a crucial role in the SynGAP-membrane complex association, stability, and dynamics. However, this aspect cannot be fully addressed through solvent simulations alone.Ω loops are known to play major roles in protein functions that require flexibility, and thus hydrophobic residues like valine are rarely tolerated. Although no negative structural effects are observed in the variant simulations, Val373 may exert drastic effects on the SynGAP-membrane complex dynamics and stability. However, since the effect on the Gly-rich Ω loop dynamics can only be studied through the SynGAP-membrane complex, no definite conclusions can be drawn.
c.1136C>G	S379W (3D Viewer)		C2	Uncertain		1	6-33438041-C-G			-8.898	Likely Pathogenic	0.388	Ambiguous	Likely Benign	0.520	Likely Pathogenic	4.32	Destabilizing	3.4	3.56	Destabilizing	3.94	Destabilizing	0.16	Likely Benign	-1.02	Neutral	0.998	Probably Damaging	0.844	Possibly Damaging	3.82	Benign	0.01	Affected	4.32	11	-2	-3	-0.1	99.14	271.3	-75.7	1.4	1.0	0.6	0.5								Uncertain	Ser379 is located in the Gly-rich Ω loop (res. Pro364-Pro398) between two anti-parallel β sheet strands (res. Thr359-Pro364, res. Ala399-Ile411). Because the Ω loop is assumed to directly interact with the membrane, it moves arbitrarily throughout the WT solvent simulations. The Ω loop potentially plays a crucial role in the SynGAP-membrane complex association, stability, and dynamics. However, this aspect cannot be fully addressed through solvent simulations alone.Ω loops are known to play major roles in protein functions that require flexibility, and thus hydrophobic residues like tryptophan are rarely tolerated. Although no major negative structural effects are observed in the variant simulations, Trp379 may exert drastic effects on the SynGAP-membrane complex dynamics and stability. However, since the effect on Gly-rich Ω loop dynamics can only be studied through the SynGAP-membrane complex, no definite conclusions can be drawn
c.1142G>T	G381V (3D Viewer)	Likely Benign	C2	Uncertain		1	6-33438047-G-T	2	1.25e-6	-5.967	Likely Benign	0.146	Likely Benign	Likely Benign	0.618	Likely Pathogenic	7.16	Destabilizing	1.0	4.10	Destabilizing	5.63	Destabilizing	-0.32	Likely Benign	-0.95	Neutral	0.386	Benign	0.157	Benign	1.32	Pathogenic	0.10	Tolerated	4.32	9	-1	-3	4.6	42.08	214.6	-68.8	0.3	0.7	-0.5	0.3								Uncertain	Gly381 is located in the Gly-rich Ω loop (res. Pro364-Pro398) between two anti-parallel β sheet strands (res. Thr359-Pro364, res. Ala399-Ile411). Because the Ω loop is assumed to directly interact with the membrane, it moves arbitrarily throughout the WT solvent simulations. The Ω loop potentially plays a crucial role in the SynGAP-membrane complex association, stability, and dynamics. However, this aspect cannot be fully addressed through solvent simulations alone.Ω loops are known to play major roles in protein functions that require flexibility, and thus hydrophobic residues like valine are rarely tolerated. Although no negative structural effects are observed in the variant simulations, Val381 may exert drastic effects on the SynGAP-membrane complex dynamics and stability. However, since the effects on Gly-rich Ω loop dynamics can only be well studied through the SynGAP-membrane complex, no definite conclusions can be drawn.
c.1352T>C	L451P (3D Viewer)	Likely Pathogenic	GAP	Likely Pathogenic		1				-14.549	Likely Pathogenic	1.000	Likely Pathogenic	Likely Pathogenic	0.750	Likely Pathogenic	6.92	Destabilizing	0.2	8.57	Destabilizing	7.75	Destabilizing	2.58	Destabilizing	-6.81	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	2.43	Pathogenic	0.00	Affected	3.37	34	-3	-3	-5.4	-16.04
c.13C>G	R5G	Likely Benign		Uncertain		1				-3.639	Likely Benign	0.150	Likely Benign	Likely Benign	0.169	Likely Benign										-0.16	Neutral	0.013	Benign	0.003	Benign	4.12	Benign	0.00	Affected	4.32	1	-2	-3	4.1	-99.14
c.1154C>G	S385W (3D Viewer)		C2	Benign		1	6-33438059-C-G			-9.353	Likely Pathogenic	0.362	Ambiguous	Likely Benign	0.373	Likely Benign	0.53	Ambiguous	0.2	0.69	Ambiguous	0.61	Ambiguous	0.00	Likely Benign	-0.84	Neutral	0.986	Probably Damaging	0.968	Probably Damaging	4.63	Benign	0.00	Affected	4.32	3	-2	-3	-0.1	99.14	260.4	-71.2	0.5	1.3	0.7	0.4								Uncertain	Ser385 is located in the Gly-rich Ω loop (res. Pro364-Pro398) between two anti-parallel β sheet strands (res. Thr359-Pro364, res. Ala399-Ile411). Because the Ω loop is assumed to directly interact with the membrane, it moves arbitrarily throughout the WT solvent simulations. The Ω loop potentially plays a crucial role in the SynGAP-membrane complex association, stability, and dynamics. However, this aspect cannot be fully addressed through solvent simulations alone.Ω loops are known to play major roles in protein functions that require flexibility, and thus hydrophobic residues like tryptophan are rarely tolerated. Although no major negative structural effects are observed in the variant simulations, Trp385 may exert drastic effects on the SynGAP-membrane complex dynamics and stability. However, since the effects on Gly-rich Ω loop dynamics can only be studied through the SynGAP-membrane complex, no definite conclusions can be drawn.	10.1016/j.ajhg.2020.11.011
c.1160G>T	G387V (3D Viewer)	Likely Benign	C2	Uncertain		1	6-33438065-G-T	22	1.37e-5	-6.199	Likely Benign	0.153	Likely Benign	Likely Benign	0.390	Likely Benign	5.13	Destabilizing	1.8	6.44	Destabilizing	5.79	Destabilizing	-0.33	Likely Benign	-0.54	Neutral	0.069	Benign	0.077	Benign	1.32	Pathogenic	0.01	Affected	4.32	3	-1	-3	4.6	42.08	207.7	-68.4	-0.7	0.8	-0.5	0.1								Uncertain	Gly387 is located in the Gly-rich Ω loop (res. Pro364-Pro398) between two anti-parallel β sheet strands (res. Thr359-Pro364 and res. Ala399-Ile411). The Ω loop is assumed to directly interact with the membrane, and it is observed to move arbitrarily throughout the WT solvent simulations. This loop potentially plays a crucial role in the SynGAP-membrane complex association, stability, and dynamics. However, this aspect cannot be fully addressed through solvent simulations alone.Ω loops are known to play significant roles in protein functions that require flexibility, and thus hydrophobic residues like valine are rarely tolerated. Although no negative structural effects are visualized in the variant’s simulations, Val387 may exert drastic effects on the SynGAP-membrane complex dynamics and stability. Since the effects on the Gly-rich Ω loop dynamics can only be well studied through the SynGAP-membrane complex, no definite conclusions can be drawn.
c.1172G>T	G391V (3D Viewer)	Likely Benign	C2	Likely Benign		1	6-33438077-G-T	3	1.86e-6	-6.642	Likely Benign	0.133	Likely Benign	Likely Benign	0.595	Likely Pathogenic	4.23	Destabilizing	1.3	4.81	Destabilizing	4.52	Destabilizing	-0.11	Likely Benign	-0.98	Neutral	0.994	Probably Damaging	0.887	Possibly Damaging	1.32	Pathogenic	0.10	Tolerated	3.69	8	-1	-3	4.6	42.08	228.6	-69.0	0.0	0.8	-0.5	0.3								Uncertain	Gly387 is located in the Gly-rich Ω loop (res. Pro364-Pro398) between two anti-parallel β sheet strands (res. Thr359-Pro364 and res. Ala399-Ile411). The Ω loop is assumed to directly interact with the membrane, and it is observed to move arbitrarily throughout the WT solvent simulations. This loop potentially plays a crucial role in the SynGAP-membrane complex association, stability, and dynamics. However, this aspect cannot be fully addressed through solvent simulations alone.Ω loops are known to play significant roles in protein functions that require flexibility, and thus hydrophobic residues like valine are rarely tolerated. Although no negative structural effects are visualized in the variant’s simulations, Val391 may exert drastic effects on the SynGAP-membrane complex dynamics and stability. Since the effects on the Gly-rich Ω loop dynamics can only be well studied through the SynGAP-membrane complex, no definite conclusions can be drawn.
c.1193C>T	P398L (3D Viewer)		C2	Uncertain		1	6-33438098-C-T	8	4.96e-6	-7.518	In-Between	0.547	Ambiguous	Likely Benign	0.599	Likely Pathogenic	1.48	Ambiguous	0.2	-0.54	Ambiguous	0.47	Likely Benign	0.62	Ambiguous	-7.10	Deleterious	0.961	Probably Damaging	0.256	Benign	5.72	Benign	0.01	Affected	3.40	16	-3	-3	5.4	16.04	245.8	-68.6	-0.1	0.0	-0.3	0.2							X	Potentially Pathogenic	Pro398 is located in the Gly-rich Ω loop (res. Pro364-Pro398) between two anti-parallel β sheet strands (res. Thr359-Pro364 and res. Ala399-Ile411). The Ω loop is assumed to directly interact with the membrane, and it is observed to move arbitrarily throughout the WT solvent simulations. Although the residue swap does not influence the nearby secondary structure elements, proline is often found at the ends of β sheets due to its disfavored status during folding.Additionally, the Ω loop potentially plays a crucial role in the SynGAP-membrane complex association, stability, and dynamics. However, this aspect cannot be fully addressed through solvent simulations alone. Ω loops are known to play significant roles in protein functions that require flexibility, and thus hydrophobic residues like leucine are rarely tolerated. Although no negative structural effects are visualized in the variant’s simulations, Leu398 may exert drastic effects on the SynGAP-membrane complex dynamics and stability. Since the effects on the Gly-rich Ω loop dynamics can only be well studied through the SynGAP-membrane complex, no definite conclusions can be drawn.
c.1213C>T	R405C (3D Viewer)	Likely Pathogenic	C2	Conflicting		2	6-33438118-C-T	6	3.72e-6	-9.206	Likely Pathogenic	0.713	Likely Pathogenic	Likely Benign	0.427	Likely Benign	0.72	Ambiguous	0.1	1.51	Ambiguous	1.12	Ambiguous	1.21	Destabilizing	-7.27	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	3.61	Benign	0.02	Affected	3.38	28	-4	-3	7.0	-53.05	221.3	82.6	-0.1	0.0	-0.2	0.3	X	X						Potentially Pathogenic	The guanidinium group of Arg405, located in an anti-parallel β sheet strand of the C2 domain (res. Ala399-Ile411), forms a salt bridge with the carboxylate group of the Glu446 side chain from an opposing α helix (res. Val441-Ser457) in the GAP domain. The positively charged Arg405 side chain also stacks with the aromatic ring of the Phe358 side chain from a loop preceding the β strand (res. Thr359-Thr366), which could assist in maintaining the anti-parallel strand arrangement.In the variant simulations, the thiol-containing side chain of Cys405 is neutral and smaller compared to the arginine side chain. The lack of Arg405-Phe358 stacking affects the loop structure, causing it to assume a β strand form—an effect that could be exacerbated during protein folding. Moreover, the inability of Cys405 to form a salt bridge with Glu446 could affect the tertiary structure assembly, although this is not apparent based on the variant simulations.
c.1499T>C	L500P (3D Viewer)	Likely Pathogenic	GAP	Pathogenic		1				-15.898	Likely Pathogenic	0.996	Likely Pathogenic	Likely Pathogenic	0.894	Likely Pathogenic	5.91	Destabilizing	0.3	8.90	Destabilizing	7.41	Destabilizing	1.92	Destabilizing	-6.96	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	-1.37	Pathogenic	0.01	Affected	3.37	35	-3	-3	-5.4	-16.04
c.1285C>T	R429W (3D Viewer)		GAP	Conflicting		5	6-33438190-C-T	65	4.03e-5	-10.666	Likely Pathogenic	0.500	Ambiguous	Likely Benign	0.282	Likely Benign	0.31	Likely Benign	0.1	-0.13	Likely Benign	0.09	Likely Benign	0.52	Ambiguous	-3.19	Deleterious	1.000	Probably Damaging	0.990	Probably Damaging	3.41	Benign	0.03	Affected	3.38	25	2	-3	3.6	30.03	252.3	45.5	0.0	0.0	0.2	0.1		X						Potentially Pathogenic	The guanidinium group of Arg429, located in an α helix (res. Met414-Glu436), either forms a salt bridge with the carboxylate group of an acidic residue (Asp474, Asp467) or a H-bond with the hydroxyl group of Ser471 in an opposing α helix (res. Ala461-Phe476). In the variant simulations, the indole ring of the Trp429 side chain cannot form ionic interactions with the acidic residues. Although it forms a H-bond with Ser471, the bonding is not as strong as that of arginine. The residue swap could affect the tertiary structure assembly during folding; however, no large-scale negative effects were seen during the simulations.
c.1559C>T	S520F (3D Viewer)	Likely Pathogenic	GAP	Uncertain		1				-12.541	Likely Pathogenic	0.999	Likely Pathogenic	Likely Pathogenic	0.833	Likely Pathogenic	-1.20	Ambiguous	0.4	0.39	Likely Benign	-0.41	Likely Benign	0.25	Likely Benign	-5.57	Deleterious	0.999	Probably Damaging	0.996	Probably Damaging	-1.36	Pathogenic	0.00	Affected	3.37	35	-2	-3	3.6	60.10
c.1292T>C	L431P (3D Viewer)	Likely Pathogenic	GAP	Likely Pathogenic		1				-14.222	Likely Pathogenic	0.996	Likely Pathogenic	Likely Pathogenic	0.659	Likely Pathogenic	6.78	Destabilizing	0.3	11.59	Destabilizing	9.19	Destabilizing	2.29	Destabilizing	-6.39	Deleterious	1.000	Probably Damaging	0.998	Probably Damaging	2.91	Benign	0.05	Affected	3.37	29	-3	-3	-5.4	-16.04	222.4	62.8	0.1	0.0	0.1	0.0	X							Potentially Pathogenic	The iso-butyl side chain of Leu431, located in an α helix (res. Met414-Glu436), packs against other hydrophobic residues in an interhelix space (e.g., Val434, Leu435, Leu696, Leu711) in the WT simulations. While the backbone amide group of Leu431 forms an H-bond with the carbonyl group of His427, the cyclic five-membered pyrrolidine ring of Pro431, lacking the necessary amide group, cannot do the same. Thus, although the cyclic five-membered pyrrolidine ring of Pro431 packs almost as favorably as the side chain of Leu431 in the hydrophobic niche, the residue swap causes the α helix to partially unfold in the variant simulations.
c.1394T>C	L465P (3D Viewer)	Likely Pathogenic	GAP	Likely Pathogenic		1				-14.824	Likely Pathogenic	1.000	Likely Pathogenic	Likely Pathogenic	0.778	Likely Pathogenic	7.18	Destabilizing	0.3	10.85	Destabilizing	9.02	Destabilizing	2.73	Destabilizing	-6.96	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	2.29	Pathogenic	0.00	Affected	3.37	34	-3	-3	-5.4	-16.04	211.1	65.9	0.1	0.0	-0.2	0.0	X							Potentially Pathogenic	The iso-butyl side chain of Leu465, located in the middle of an α helix (res. Ala461–Phe476), packs with hydrophobic residues (e.g., Phe464, Met468, Tyr497, Ile494) in an inter-helix space formed with two other α helices (res. Ala461–Phe476 and res. Thr488-Gly502). In the variant simulations, the cyclic five-membered pyrrolidine ring of Pro465 is not as optimal as the side chain of Leu465 for filling the three α helix hydrophobic niche. Although the residue swap does not cause a large-scale conformational shift during the simulations, the H-bond between the backbone amide group of Leu465 and the backbone carbonyl group of Ala461 is lost. This, in turn, breaks the continuity of the α helix secondary structure element.
c.1712C>T	S571L (3D Viewer)	Likely Pathogenic	GAP	Uncertain		1	6-33440764-C-T	1	6.23e-7	-11.651	Likely Pathogenic	0.660	Likely Pathogenic	Likely Benign	0.841	Likely Pathogenic	-1.53	Ambiguous	0.1	-1.05	Ambiguous	-1.29	Ambiguous	0.27	Likely Benign	-5.61	Deleterious	1.000	Probably Damaging	0.996	Probably Damaging	-1.25	Pathogenic	0.04	Affected	3.37	35	-2	-3	4.6	26.08
c.1423C>T	R475W (3D Viewer)	Likely Pathogenic	GAP	Uncertain		1	6-33438455-C-T	1	6.20e-7	-13.235	Likely Pathogenic	0.962	Likely Pathogenic	Likely Pathogenic	0.725	Likely Pathogenic	1.44	Ambiguous	0.4	-0.92	Ambiguous	0.26	Likely Benign	0.56	Ambiguous	-7.56	Deleterious	1.000	Probably Damaging	0.995	Probably Damaging	-1.45	Pathogenic	0.00	Affected	3.39	28	2	-3	3.6	30.03	266.9	39.6	0.0	0.0	0.0	0.1	X	X		X				Potentially Pathogenic	In the WT simulations, the guanidinium group of Arg475, located near the end of an α-helix (res. Ala461-Phe476), stacks with the phenyl ring of Phe476 and forms a salt bridge with Glu472. Additionally, Arg475 occasionally forms another salt bridge with the carboxylate group of Glu486 on the α-α loop connecting the two α-helices (res. Ala461-Phe476 and Leu489-Glu519) at the GAP-Ras interface. Therefore, Arg475 potentially plays a key role in positioning the loop by interacting with Glu486, which is necessary for the positioning of the “arginine finger” (Arg485) and, ultimately, for RasGTPase activation.In the variant simulations, Trp475 moves and stacks with Arg479 on the proceeding α-α loop, disrupting the terminal end of the α-helix. Lastly, the potential effect of the residue swap on the SynGAP-Ras complex formation or GTPase activation cannot be fully addressed using the SynGAP solvent-only simulations.
c.1763T>C	L588P (3D Viewer)	Likely Pathogenic	GAP	Uncertain		1				-14.771	Likely Pathogenic	1.000	Likely Pathogenic	Likely Pathogenic	0.932	Likely Pathogenic	5.61	Destabilizing	0.5	12.91	Destabilizing	9.26	Destabilizing	2.33	Destabilizing	-6.97	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	-1.42	Pathogenic	0.00	Affected	3.38	34	-3	-3	-5.4	-16.04
c.1778T>C	L593P (3D Viewer)	Likely Pathogenic	GAP	Uncertain		1				-13.961	Likely Pathogenic	0.999	Likely Pathogenic	Likely Pathogenic	0.777	Likely Pathogenic	5.75	Destabilizing	0.9	10.77	Destabilizing	8.26	Destabilizing	2.43	Destabilizing	-6.77	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	2.77	Benign	0.00	Affected			-3	-3	-5.4	-16.04
c.1453C>T	R485C (3D Viewer)	Likely Pathogenic	GAP	Uncertain		2	6-33438485-C-T	9	5.58e-6	-14.294	Likely Pathogenic	0.976	Likely Pathogenic	Likely Pathogenic	0.597	Likely Pathogenic	1.00	Ambiguous	0.1	0.26	Likely Benign	0.63	Ambiguous	0.44	Likely Benign	-7.96	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	1.90	Pathogenic	0.00	Affected	3.37	35	-4	-3	7.0	-53.05	225.5	99.6	-0.1	0.0	-0.3	0.2				X				Uncertain	The guanidinium group of Arg485 is located in a short helical structure (res. Glu480-Leu482) within an α-α loop connecting the two α-helices (res. Ala461-Phe476 and Leu489-Glu519) at the GAP-Ras interface. The side chain of Arg485 acts as the “arginine finger” of SynGAP, playing a crucial role in Ras-GTPase activation. Consequently, the residue swap inhibits the conversion of GTP to GDP at the enzyme’s active site. Although no negative effects on the protein structure are observed during the simulations, no definite conclusions can be drawn due to the critical role of Arg485 in GTPase activation.
c.1466T>C	L489P (3D Viewer)	Likely Pathogenic	GAP	Conflicting		2				-13.520	Likely Pathogenic	0.997	Likely Pathogenic	Likely Pathogenic	0.939	Likely Pathogenic	2.50	Destabilizing	0.1	4.69	Destabilizing	3.60	Destabilizing	1.73	Destabilizing	-6.74	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	-1.56	Pathogenic	0.00	Affected	3.37	35	-3	-3	-5.4	-16.04	209.9	61.9	0.1	0.0	0.6	0.1		X						Potentially Pathogenic	The iso-butyl side chain of Leu489, located in the α-helix (res. Leu489-Glu519) within an inter-helix space of four helices (res. Ala461-Phe476, res. Val441-Ser457, and res. Met414-Glu436), packs with hydrophobic residues (e.g., Cys432, Ala448, Lys444, Ala493, Val447, Met468). In the variant simulations, Pro489 is located near the beginning of the α-helix, so the residue swap with Leu489 does not affect the continuity of the secondary structure element. However, the side chain of proline is not as optimal as that of leucine for maintaining hydrophobic packing with nearby residues (e.g., Ala448, Lys444). Additionally, the consistently maintained hydrogen bond interaction between the backbone amide group of Leu489 and the carbonyl of Glu436 is lost due to the residue swap, potentially affecting the tertiary structure integrity.
c.1784T>C	L595P (3D Viewer)	Likely Pathogenic	GAP	Uncertain		1				-11.856	Likely Pathogenic	0.999	Likely Pathogenic	Likely Pathogenic	0.747	Likely Pathogenic	2.09	Destabilizing	0.8	5.88	Destabilizing	3.99	Destabilizing	1.78	Destabilizing	-6.97	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	2.72	Benign	0.00	Affected	3.37	35	-3	-3	-5.4	-16.04
c.1481T>G	I494R (3D Viewer)	Likely Pathogenic	GAP	Likely Pathogenic		1				-15.758	Likely Pathogenic	0.995	Likely Pathogenic	Likely Pathogenic	0.911	Likely Pathogenic	6.71	Destabilizing	0.3	3.40	Destabilizing	5.06	Destabilizing	2.19	Destabilizing	-6.43	Deleterious	0.999	Probably Damaging	0.957	Probably Damaging	-1.41	Pathogenic	0.00	Affected	3.37	35	-2	-3	-9.0	43.03	273.9	-59.8	0.0	0.0	0.0	0.1	X	X	X				X	Potentially Pathogenic	The sec-butyl side chain of Ile494, located in an α-helix (res. Leu489-Glu519), packs against hydrophobic residues (e.g., Phe484, Leu465, Trp572, Ala493, Met468) in an inter-helix space (res. Leu489-Glu519 and res. Ala461-Phe476). In the variant simulations, the bulkier and positively charged residue, Arg494, weakens the integrity of the opposing helix. Additionally, the bulkier Arg494 stacks with Phe484, causing the α-helices to move farther apart to accommodate it. This mutation could have substantial negative effects due to the fundamental role of hydrophobic packing, which is disrupted by Arg494 during protein folding.
c.1517T>C	L506P (3D Viewer)	Likely Pathogenic	GAP	Likely Pathogenic		1				-12.088	Likely Pathogenic	0.998	Likely Pathogenic	Likely Pathogenic	0.737	Likely Pathogenic	5.48	Destabilizing	0.7	10.19	Destabilizing	7.84	Destabilizing	2.50	Destabilizing	-6.96	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	1.55	Pathogenic	0.00	Affected	3.37	35	-3	-3	-5.4	-16.04	182.6	64.9	0.1	0.0	0.2	0.1	X							Potentially Pathogenic	Leu506 is located in the middle of an α-helix (res. Gly502-Tyr518) within the inter-helix space of two helices (res. Gly502-Tyr518 and res. Glu582-Met603). In the WT simulations, the iso-butyl side chain of Leu506 hydrophobically packs with residues in the inter-helix space (e.g., Ile510, Phe597, Leu598, Ala601). In the variant simulations, the cyclic five-membered pyrrolidine ring of Pro506 is not as optimal as Leu506 for hydrophobic packing with nearby residues. Additionally, Pro506 cannot maintain the hydrogen bond with the backbone oxygen of Gly502 as Leu506 does in the WT, which disrupts the secondary structure element.
c.1579G>T	D527Y (3D Viewer)	Likely Pathogenic	GAP	Uncertain		1				-15.386	Likely Pathogenic	0.978	Likely Pathogenic	Likely Pathogenic	0.905	Likely Pathogenic	-0.77	Ambiguous	0.2	1.89	Ambiguous	0.56	Ambiguous	-0.14	Likely Benign	-8.79	Deleterious	1.000	Probably Damaging	0.999	Probably Damaging	-2.41	Pathogenic	0.00	Affected	3.37	35	-4	-3	2.2	48.09	270.9	-45.7	0.1	0.1	-0.1	0.0		X						Potentially Pathogenic	Asp527 is located on an α-α loop between the two α-helices (res. Gly502-Tyr518 and Ala533-Val560). In the WT simulations, the carboxylate group of the Asp527 side chain forms hydrogen bonds with the backbone atoms of loop residues (e.g., Ile529, Lys530) facing the membrane surface. In the variant simulations, Tyr527 is a bulkier residue that faces away from the loop and stacks with Phe646 in a nearby α-helix (res. Ser614-Ser668). Regardless, no negative structural effects are observed during the variant simulations. However, due to its location near the SynGAP-membrane interface, the effect of the residue swap cannot be fully addressed using the SynGAP solvent-only simulations.
c.1639T>C	C547R (3D Viewer)	Likely Pathogenic	GAP	Uncertain		1				-16.967	Likely Pathogenic	0.999	Likely Pathogenic	Likely Pathogenic	0.900	Likely Pathogenic	7.76	Destabilizing	0.8	5.83	Destabilizing	6.80	Destabilizing	1.69	Destabilizing	-11.60	Deleterious	1.000	Probably Damaging	0.998	Probably Damaging	-1.33	Pathogenic	0.02	Affected	3.37	35	-4	-3	-7.0	53.05	267.4	-90.3	0.0	0.0	-0.1	0.1	X	X	X				X	Potentially Pathogenic	Cys547 is located in an α-helix (res. Ala533-Val560). The thiol side chain of Cys is situated in a hydrophobic inter-helix space, where it packs hydrophobically with other residues such as Ile626, Leu551, and Phe652. Additionally, the thiol side chain of Cys547 weakly hydrogen bonds with the carbonyl group of Leu543 in the same α-helix. In the variant simulations, the bulkier, positively charged guanidinium group of Arg547 must rotate out of the hydrophobic space. Consequently, it forms ionic interactions with the carboxylate groups of Glu548 in the same helix and Glu656 in the neighboring α-helix (res. Glu666-Asp644). This causes the two helices to slightly separate, significantly affecting the secondary structure integrity of the latter helix. These negative structural effects could be more pronounced during protein folding and are likely to be undermined in the MD simulations.
c.1652T>C	L551P (3D Viewer)	Likely Pathogenic	GAP	Likely Pathogenic		1				-14.620	Likely Pathogenic	0.999	Likely Pathogenic	Likely Pathogenic	0.953	Likely Pathogenic	6.66	Destabilizing	0.1	6.58	Destabilizing	6.62	Destabilizing	2.66	Destabilizing	-4.70	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	-1.60	Pathogenic	0.01	Affected	3.37	35	-3	-3	-5.4	-16.04	208.6	60.9	0.1	0.0	-0.3	0.0	X							Potentially Pathogenic	L551 is located on an α-helix (res. Ala533-Val560). The iso-butyl side chain of Leu551 hydrophobically packs with nearby hydrophobic residues such as Cys547, Phe652, Leu633, and Ile630 in the inter-helix space. In the variant simulations, the pyrrolidine side chain of Pro551 is not as optimal as leucine for hydrophobic packing with the nearby residues. Moreover, Pro551 lacks the amide group, and thus, it cannot form a hydrogen bond with the backbone carbonyl group of Cys547, which disrupts the continuity of the secondary structure element.
c.1685C>T	P562L (3D Viewer)	Likely Pathogenic	GAP	Pathogenic/Likely path.		10	6-33440737-C-T			-13.438	Likely Pathogenic	0.996	Likely Pathogenic	Likely Pathogenic	0.829	Likely Pathogenic	3.54	Destabilizing	0.8	0.17	Likely Benign	1.86	Ambiguous	-0.14	Likely Benign	-9.95	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	0.58	Pathogenic	0.00	Affected	3.37	35	-3	-3	5.4	16.04	228.8	-68.5	-0.1	0.0	0.1	0.2							X	Potentially Pathogenic	Pro562 is located on an α-α loop between two α-helices (res. Ala533-Val560 and res. Arg563-Glu578). The cyclic pyrrolidine side chain of Pro562 hydrophobically packs with other residues in the inter-helix space, such as Leu565, Ile501, and Phe561. In the variant simulations, Leu562 packs more favorably with the nearby hydrophobic residues, and the backbone amide group of Leu562 (absent in proline) does not form any intra-protein hydrogen bonds. However, prolines are well-suited for unstructured regions like loops, and thus, Pro562 in the WT is necessary at the end of the helix to induce a tight turn during folding. Although no negative structural effects are observed during the simulations, the residue swap could potentially cause extensive damage to the protein structure during folding.	10.1016/j.ajhg.2020.11.011
c.1714T>C	W572R (3D Viewer)	Likely Pathogenic	GAP	Not provided		1				-17.511	Likely Pathogenic	1.000	Likely Pathogenic	Likely Pathogenic	0.894	Likely Pathogenic	4.84	Destabilizing	0.1	6.19	Destabilizing	5.52	Destabilizing	1.79	Destabilizing	-12.81	Deleterious					-1.25	Pathogenic	0.00	Affected	3.37	35	2	-3	-3.6	-30.03	312.6	-37.6	0.0	0.0	-1.0	0.0		X	X					Potentially Pathogenic	The indole ring of Trp572, located in an α-helix (res. Arg563-Glu578), lies in a hydrophobic inter-helix space, where it makes extensive hydrophobic interactions with nearby residues such as Met470, Phe569, Leu588, and Ile589. The guanidinium group of Arg572 is similarly sized to the tryptophan it replaced; however, it is also positively charged. In the variant simulations, Arg572 forms hydrogen bonds with other residues in the inter-helix space, such as Ser592 and the backbone carbonyl atom of Leu465. Additionally, Arg572 hydrophobically packs its carbon chain with surrounding residues such as Phe569 and Ile589.However, the introduced residue arginine is too hydrophilic and charged for the hydrophobic space, disrupting the hydrophobic packing of the inter-helix space. Indeed, in the second simulation, Arg572 successfully escapes the hydrophobic niche completely, causing the whole protein to partially unfold.Overall, the residue swap is highly likely to cause critical protein folding problems, as evidenced by the effects seen in the variant simulations.
c.1715G>C	W572S (3D Viewer)	Likely Pathogenic	GAP	Pathogenic		1				-17.461	Likely Pathogenic	0.999	Likely Pathogenic	Likely Pathogenic	0.775	Likely Pathogenic	5.78	Destabilizing	0.2	3.37	Destabilizing	4.58	Destabilizing	1.79	Destabilizing	-12.74	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	-1.24	Pathogenic	0.01	Affected	3.37	35	-2	-3	0.1	-99.14	235.1	76.6	0.0	0.0	-0.4	0.1							X	Potentially Pathogenic	The introduced residue Ser572, located in an α-helix (res. Arg563-Glu578), is considerably smaller than the tryptophan it replaced. The indole ring of the Trp572 side chain lies in a hydrophobic inter-helix space, where it makes extensive hydrophobic interactions with nearby residues such as Met470, Phe569, Leu588, and Ile589. In the variant simulations, all these favorable packing interactions are completely removed, as the introduced residue Ser572 is too hydrophilic or small to fill the hydrophobic niche occupied by the indole ring. Moreover, the hydroxyl group of Ser572 forms hydrogen bonds with the carbonyl groups of Glu567 and Val568 within the same α-helix, potentially lowering its integrity. Overall, the residue swap is highly likely to cause critical protein folding problems that are underestimated based on the effects seen in the variant simulations.
c.1717C>T	R573W (3D Viewer)	Likely Pathogenic	GAP	Conflicting		8				-14.078	Likely Pathogenic	0.995	Likely Pathogenic	Likely Pathogenic	0.758	Likely Pathogenic	2.37	Destabilizing	0.7	0.57	Ambiguous	1.47	Ambiguous	0.88	Ambiguous	-6.94	Deleterious	1.000	Probably Damaging	0.997	Probably Damaging	-1.48	Pathogenic	0.00	Affected	3.37	35	2	-3	3.6	30.03	257.6	39.0	0.1	0.0	0.2	0.0	X	X						Potentially Pathogenic	The guanidinium group of Arg573, located in an α-helix (res. Arg563-Glu578), forms a salt bridge with the carboxylate groups of Glu582 and/or Asp586 from a nearby α-helix (res. Glu582-Met603) in the WT simulations. Additionally, the Arg573 side chain stacks planarly with the aromatic phenol ring of Tyr665 and hydrogen bonds with the hydroxyl group of Ser668 from another α-helix (res. Ser641-Ser668). In the variant simulations, the indole ring of the Trp573 side chain is unable to maintain the same level of coordination as the positively charged Arg573 side chain. Indeed, Trp573 is seen hydrogen bonding only briefly with the carboxylate group of Glu582. Consequently, the integrity of the opposing α-helix end (res. Glu582-Met603) is weakened. Overall, the residue swap has the potential to substantially affect the tertiary structure assembly during the protein folding process.
c.2206C>T	R736C			Conflicting		3	6-33441671-C-T	8	4.96e-6	-7.113	In-Between	0.120	Likely Benign	Likely Benign	0.190	Likely Benign										-2.06	Neutral	0.999	Probably Damaging	0.825	Possibly Damaging	2.48	Pathogenic	0.00	Affected	4.07	3	-4	-3	7.0	-53.05
c.1723C>T	R575C (3D Viewer)	Likely Pathogenic	GAP	Conflicting		3	6-33440775-C-T	23	1.43e-5	-11.179	Likely Pathogenic	0.630	Likely Pathogenic	Likely Benign	0.715	Likely Pathogenic	1.39	Ambiguous	0.2	0.50	Ambiguous	0.95	Ambiguous	0.73	Ambiguous	-5.43	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	-1.30	Pathogenic	0.02	Affected	3.37	35	-4	-3	7.0	-53.05	227.7	99.2	0.0	0.0	0.0	0.1		X						Potentially Pathogenic	The guanidinium group of Arg575, located in an α-helix (res. Arg563-Glu578), forms salt bridges with the carboxylate groups of Asp463 and Asp467, and it also hydrogen bonds with the hydroxyl group of Ser466 on an opposing α-helix (res. Ala461-Phe476) in the WT simulations. In the variant simulations, the thiol group of the Cys575 side chain, which is neither positively charged nor particularly hydrophilic, packs against the hydrophobic Met470 on an opposing α-helix (res. Ala461-Arg475). Additionally, although the thiol group is not an effective hydrogen bonder, the Cys575 side chain rotates to hydrogen bond with the backbone carbonyl group of Ser571 in the same α-helix, which could theoretically lower the helix integrity. Overall, the residue swap has the potential to substantially affect the tertiary structure assembly during the protein folding process.
c.1741C>T	R581W (3D Viewer)	Likely Pathogenic	GAP	Uncertain		2				-12.855	Likely Pathogenic	0.920	Likely Pathogenic	Ambiguous	0.678	Likely Pathogenic	1.32	Ambiguous	0.1	-0.32	Likely Benign	0.50	Ambiguous	0.68	Ambiguous	-6.79	Deleterious	1.000	Probably Damaging	0.997	Probably Damaging	-1.37	Pathogenic	0.01	Affected	3.37	34	2	-3	3.6	30.03	257.8	36.0	0.1	0.1	0.1	0.3	X	X						Potentially Pathogenic	Arg581 is located on a short α-α loop between two α helices (res. Arg563-Glu578 and res. Glu582-Ser604). In the WT simulations, the guanidinium group of Arg581 forms salt bridges with the carboxylate groups of Asp583 within the same helix, as well as with Glu478 and/or Glu480 in a slightly α-helical loop (res. Glu478-Thr488) preceding another α helix (res. Ala461-Phe476).In the variant simulations, the neutral indole ring of the Trp581 side chain cannot form any of these salt bridges. Instead, it packs hydrophobically against Met477 and Ile587 without forming any direct hydrogen bonds. The tendency of the loop (res. Asp477-Thr488) to acquire an α-helical structure seems to marginally increase, potentially due to Trp581's inability to coordinate stable hydrogen bonds with the loop residues (e.g., Glu478-Arg581 salt bridge). Additionally, the residue swap could weaken the tertiary structure assembly and negatively affect the overall protein folding process.
c.2218C>T	R740W			Uncertain		2	6-33441683-C-T	6	3.72e-6	-8.561	Likely Pathogenic	0.168	Likely Benign	Likely Benign	0.180	Likely Benign										-3.09	Deleterious	1.000	Probably Damaging	0.938	Probably Damaging	2.52	Benign	0.01	Affected	4.32	2	2	-3	3.6	30.03
c.1763T>A	L588H (3D Viewer)	Likely Pathogenic	GAP	Likely Pathogenic		1				-16.947	Likely Pathogenic	0.999	Likely Pathogenic	Likely Pathogenic	0.939	Likely Pathogenic	4.20	Destabilizing	0.2	3.69	Destabilizing	3.95	Destabilizing	2.26	Destabilizing	-6.97	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	-1.42	Pathogenic	0.00	Affected	3.38	34	-2	-3	-7.0	23.98	214.3	20.9	0.0	0.0	0.0	0.2	X	X					X	Potentially Pathogenic	The isobutyl group of the Leu588 side chain, located in an α helix (res. Glu582-Met603), packs against hydrophobic residues in the inter-helix hydrophobic space (e.g., Ile584, Trp572, Phe484, Met470, Val473, Ile483).In the variant simulations, the imidazole ring of His588 is aromatic but contains polar delta and epsilon nitrogen atoms that are not suited for the hydrophobic niche. The protonated epsilon nitrogen forms a hydrogen bond with the backbone carbonyl group of Ala469, which can disrupt the continuity of the opposing α helix (res. Phe476-Lys460).While the residue swap could affect the tertiary assembly and the underlying protein folding process, it is difficult to determine if the mutation would be tolerated based solely on the variant simulations.
c.2245C>T	R749W			Likely Benign		1	6-33441710-C-T	3	1.86e-6	-7.647	In-Between	0.338	Likely Benign	Likely Benign	0.173	Likely Benign										-2.62	Deleterious	1.000	Probably Damaging	0.998	Probably Damaging	2.59	Benign	0.00	Affected	4.32	2	2	-3	3.6	30.03
c.1778T>A	L593H (3D Viewer)	Likely Pathogenic	GAP	Uncertain		1				-16.504	Likely Pathogenic	0.998	Likely Pathogenic	Likely Pathogenic	0.812	Likely Pathogenic	2.52	Destabilizing	0.2	2.32	Destabilizing	2.42	Destabilizing	2.75	Destabilizing	-6.77	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	2.77	Benign	0.00	Affected	3.37	35	-2	-3	-7.0	23.98	222.0	20.7	0.0	0.0	0.2	0.0		X					X	Potentially Pathogenic	The iso-propyl side chain of Leu593, located in an α helix (res. Glu582-Met603), packs favourably with multiple hydrophobic residues in the inter-helix space (e.g., Leu598, Ile589, Phe594, Phe561).In the variant simulations, His593 retains a similar packing arrangement via its aromatic imidazole ring. However, the polar nitrogen atoms introduce hydrogen bond donors and acceptors into the previously hydrophobic space. The epsilon protonated nitrogen of His593 forms a stable hydrogen bond with the phenol group of the Tyr505 side chain in an α helix (res. Gln503-Tyr518).While the residue swap could affect the tertiary assembly and the underlying protein folding process, it is difficult to determine if the mutation would be tolerated based solely on the variant simulations.
c.1786C>T	R596C (3D Viewer)	Likely Pathogenic	GAP	Conflicting		2	6-33440838-C-T	6	3.72e-6	-10.805	Likely Pathogenic	0.972	Likely Pathogenic	Likely Pathogenic	0.633	Likely Pathogenic	2.94	Destabilizing	0.0	1.49	Ambiguous	2.22	Destabilizing	-0.03	Likely Benign	-7.96	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	2.41	Pathogenic	0.00	Affected	3.37	35	-4	-3	7.0	-53.05	230.7	97.9	-0.1	0.0	-0.3	0.4		X		X				Potentially Pathogenic	The guanidinium group of Arg596, located in an α helix (res. Glu582-Met603), forms a salt bridge with the carboxylate group of Glu495 from another α helix (res. Leu489-Glu519). In the WT simulations, the side chain of Arg596 hydrogen bonds with the backbone carbonyl groups of Asn487, Glu486, Arg485, and Phe484. Additionally, Arg596 can hydrogen bond with the carboxamide group of the Asn487 side chain on an opposing loop that links two α helices (res. Ala461-Arg475, res. Leu489-Glu519).In the variant simulations, the thiol group of the Cys596 side chain is unable to form salt bridges or any of the hydrogen bonds that the Arg596 side chain can. Thus, the residue swap could affect the tertiary structure assembly more profoundly than observed in the simulations. Notably, Arg596 plays a key role in positioning the aforementioned loop, which is crucial for the placement of the “arginine finger” or the Arg485 side chain during RasGTPase activation.
c.2302G>T	D768Y	Likely Pathogenic		Uncertain		1	6-33442460-G-T			-9.866	Likely Pathogenic	0.824	Likely Pathogenic	Ambiguous	0.234	Likely Benign										-2.86	Deleterious	0.989	Probably Damaging	0.806	Possibly Damaging	4.01	Benign	0.07	Tolerated	3.64	6	-4	-3	2.2	48.09
c.2353C>T	R785C	Likely Pathogenic	SH3-binding motif	Uncertain		1	6-33442905-C-T	29	1.80e-5	-5.887	Likely Benign	0.662	Likely Pathogenic	Likely Benign	0.126	Likely Benign										-5.06	Deleterious	0.144	Benign	0.046	Benign	2.22	Pathogenic	0.00	Affected	3.64	6	-4	-3	7.0	-53.05
c.2381C>T	P794L	Likely Benign	SH3-binding motif	Benign/Likely benign		2	6-33442933-C-T	73	4.52e-5	-3.808	Likely Benign	0.079	Likely Benign	Likely Benign	0.075	Likely Benign										-0.80	Neutral	0.761	Possibly Damaging	0.321	Benign	4.24	Benign	0.03	Affected	4.07	3	-3	-3	5.4	16.04
c.1898T>C	L633P (3D Viewer)	Likely Pathogenic	GAP	Pathogenic/Likely path.		2				-15.669	Likely Pathogenic	1.000	Likely Pathogenic	Likely Pathogenic	0.693	Likely Pathogenic	6.60	Destabilizing	0.2	10.15	Destabilizing	8.38	Destabilizing	2.42	Destabilizing	-6.97	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	2.70	Benign	0.00	Affected	3.37	34	-3	-3	-5.4	-16.04	193.2	65.1	0.0	0.0	0.1	0.0	X							Potentially Pathogenic	The iso-butyl side chain of Leu633, located in the middle of an α helix (res. Glu617-Asn635), packs hydrophobically with nearby residues (e.g., Leu653, Val629, Leu551) in the WT simulations.In the variant simulations, the pyrrolidine side chain of Pro633 is not as optimal for hydrophobic packing as Leu633 in the WT. Additionally, proline lacks a free backbone amide group, so Pro633 cannot form a hydrogen bond with the backbone carbonyl group of Val629, which disrupts the continuity of the secondary structure element.
c.2393C>T	P798L	Likely Benign	SH3-binding motif	Uncertain		2	6-33442945-C-T	6	3.72e-6	-5.640	Likely Benign	0.074	Likely Benign	Likely Benign	0.042	Likely Benign										-0.86	Neutral	0.981	Probably Damaging	0.631	Possibly Damaging	4.21	Benign	0.00	Affected	4.32	1	-3	-3	5.4	16.04
c.2414T>C	L805P		SH3-binding motif	Uncertain		1				-4.661	Likely Benign	0.444	Ambiguous	Likely Benign	0.272	Likely Benign										-3.40	Deleterious	0.975	Probably Damaging	0.767	Possibly Damaging	2.36	Pathogenic	0.00	Affected	3.77	5	-3	-3	-5.4	-16.04
c.2443C>T	R815C	Likely Pathogenic	SH3-binding motif	Uncertain		1	6-33442995-C-T	5	3.10e-6	-9.373	Likely Pathogenic	0.828	Likely Pathogenic	Ambiguous	0.174	Likely Benign										-3.89	Deleterious	1.000	Probably Damaging	0.998	Probably Damaging	2.59	Benign	0.00	Affected	4.32	4	-4	-3	7.0	-53.05
c.2444G>T	R815L	Likely Pathogenic	SH3-binding motif	Uncertain		1				-8.546	Likely Pathogenic	0.865	Likely Pathogenic	Ambiguous	0.175	Likely Benign										-3.06	Deleterious	0.999	Probably Damaging	0.997	Probably Damaging	2.63	Benign	0.03	Affected	4.32	4	-2	-3	8.3	-43.03
c.2474C>T	S825L	Likely Pathogenic		Uncertain		1	6-33443026-C-T	1	6.20e-7	-4.987	Likely Benign	0.910	Likely Pathogenic	Ambiguous	0.249	Likely Benign										-4.30	Deleterious	0.999	Probably Damaging	0.994	Probably Damaging	1.94	Pathogenic	0.01	Affected	3.77	5	-2	-3	4.6	26.08
c.2075T>C	L692P (3D Viewer)	Likely Pathogenic	GAP	Uncertain		1				-16.447	Likely Pathogenic	1.000	Likely Pathogenic	Likely Pathogenic	0.668	Likely Pathogenic	9.19	Destabilizing	0.1	13.20	Destabilizing	11.20	Destabilizing	1.69	Destabilizing	-6.98	Deleterious	1.000	Probably Damaging	0.999	Probably Damaging	3.06	Benign	0.00	Affected	3.42	17	-3	-3	-5.4	-16.04	186.2	62.8	-0.2	0.1	-0.7	0.3	X							Potentially Pathogenic	The isobutyl side chain of Leu692, located in the middle of an α-helix (res. Leu685-Gln702), engages in hydrophobic packing with nearby residues (e.g., Leu441, Leu431, Leu696) in the inter-helix space. Prolines lack a free amide group necessary for hydrogen bonding with the carbonyl group of Glu688 in the same manner as Leu692 in the WT. Consequently, the residue swap with proline disrupts the continuity of the secondary structure element in the variant simulations. Additionally, the side chain of Pro692 is not as optimal as Leu692 for hydrophobic packing in the inter-helix space.
c.2087T>C	L696P (3D Viewer)	Likely Pathogenic	GAP	Likely Pathogenic		1				-16.926	Likely Pathogenic	1.000	Likely Pathogenic	Likely Pathogenic	0.678	Likely Pathogenic	6.66	Destabilizing	0.2	10.84	Destabilizing	8.75	Destabilizing	2.13	Destabilizing	-6.58	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	3.00	Benign	0.00	Affected	3.46	13	-3	-3	-5.4	-16.04	180.6	65.9	0.1	0.0	-0.6	0.1	X							Potentially Pathogenic	The isobutyl side chain of Leu696, located in the middle of an α-helix (res. Leu685-Gln702), engages in hydrophobic packing with nearby residues (e.g., Leu441, Leu431, Leu692, Leu714) in the inter-helix space. Prolines lack a free amide group necessary for hydrogen bonding with the carbonyl group of Leu692 in the same manner as Leu696 in the WT. Consequently, the residue swap with proline disrupts the continuity of the secondary structure element in the variant simulations. Additionally, the side chain of Pro696 is not as optimal as Leu696 for hydrophobic packing in the inter-helix space.
c.2089T>C	W697R (3D Viewer)	Likely Pathogenic	GAP	Likely Benign		1	6-33441348-T-C	1	6.20e-7	-10.020	Likely Pathogenic	0.941	Likely Pathogenic	Ambiguous	0.401	Likely Benign	1.14	Ambiguous	0.1	1.18	Ambiguous	1.16	Ambiguous	1.25	Destabilizing	-9.50	Deleterious	1.000	Probably Damaging	0.994	Probably Damaging	3.45	Benign	0.02	Affected	3.46	13	2	-3	-3.6	-30.03	254.4	-41.2	0.0	0.0	-0.7	0.0						X		Potentially Benign	The indole ring of Trp697, located on the outer surface of an α-helix (res. Leu685-Val699), is not involved in any long-lasting interactions in the WT simulations. In the variant simulations, the positively charged guanidinium side chain of Arg697 occasionally forms hydrogen bonds with nearby residues, such as Ser722 and Asn719. However, similar to Trp697 in the WT, Arg697 does not form any long-lasting interactions and thus does not induce any negative structural effects in the simulations.
c.2627C>T	S876L			Uncertain		2				-5.856	Likely Benign	0.489	Ambiguous	Likely Benign	0.249	Likely Benign										-3.56	Deleterious	0.998	Probably Damaging	0.992	Probably Damaging	2.57	Benign	0.05	Affected	3.77	5	-2	-3	4.6	26.08
c.2668C>T	R890C			Benign		1	6-33443220-C-T	9	5.58e-6	-5.786	Likely Benign	0.402	Ambiguous	Likely Benign	0.200	Likely Benign										-3.38	Deleterious	1.000	Probably Damaging	0.971	Probably Damaging	3.94	Benign	0.04	Affected	4.32	4	-4	-3	7.0	-53.05
c.266C>T	P89L			Uncertain		2				-6.775	Likely Benign	0.982	Likely Pathogenic	Likely Pathogenic	0.119	Likely Benign										-3.29	Deleterious	0.889	Possibly Damaging	0.058	Benign	3.73	Benign	0.00	Affected	4.32	1	-3	-3	5.4	16.04
c.2713C>T	R905C			Conflicting		2	6-33443265-C-T	15	9.31e-6	-5.578	Likely Benign	0.723	Likely Pathogenic	Likely Benign	0.194	Likely Benign										-3.14	Deleterious	1.000	Probably Damaging	0.980	Probably Damaging	2.57	Benign	0.01	Affected	3.77	5	-4	-3	7.0	-53.05
c.2768T>A	I923N	Likely Benign		Uncertain		1				-0.733	Likely Benign	0.712	Likely Pathogenic	Likely Benign	0.108	Likely Benign										-1.16	Neutral	0.991	Probably Damaging	0.793	Possibly Damaging	2.70	Benign	0.13	Tolerated	3.77	5	-2	-3	-8.0	0.94
c.277C>G	R93G	Likely Benign		Uncertain		1				-2.674	Likely Benign	0.400	Ambiguous	Likely Benign	0.093	Likely Benign										-1.69	Neutral	0.103	Benign	0.019	Benign	3.99	Benign	0.00	Affected	4.32	1	-2	-3	4.1	-99.14
c.2822C>T	P941L	Likely Benign		Uncertain		2				-5.692	Likely Benign	0.066	Likely Benign	Likely Benign	0.054	Likely Benign										-0.44	Neutral	0.144	Benign	0.039	Benign	2.76	Benign	0.01	Affected			-3	-3	5.4	16.04
c.2825C>T	P942L	Likely Benign		Uncertain		1	6-33443377-C-T	4	2.48e-6	-5.063	Likely Benign	0.086	Likely Benign	Likely Benign	0.048	Likely Benign										-2.00	Neutral	0.411	Benign	0.239	Benign	2.37	Pathogenic	0.00	Affected	4.32	4	-3	-3	5.4	16.04
c.2855G>T	G952V	Likely Benign		Uncertain		1				-7.074	In-Between	0.078	Likely Benign	Likely Benign	0.231	Likely Benign										-0.33	Neutral	0.000	Benign	0.000	Benign	3.20	Benign	0.02	Affected	3.77	5	-1	-3	4.6	42.08
c.28C>T	R10W	Likely Benign		Uncertain		1	6-33420292-C-T	2	1.30e-6	-5.707	Likely Benign	0.503	Ambiguous	Likely Benign	0.236	Likely Benign										-0.31	Neutral	0.964	Probably Damaging	0.190	Benign	4.10	Benign	0.00	Affected	4.32	1	2	-3	3.6	30.03
c.2900G>T	R967L	Likely Benign		Uncertain		1	6-33443452-G-T	1	6.20e-7	-3.496	Likely Benign	0.164	Likely Benign	Likely Benign	0.123	Likely Benign										-0.99	Neutral	0.959	Probably Damaging	0.586	Possibly Damaging	4.15	Benign	0.75	Tolerated	4.32	2	-2	-3	8.3	-43.03
c.3002T>C	L1001P	Likely Benign		Uncertain		1				-3.071	Likely Benign	0.209	Likely Benign	Likely Benign	0.113	Likely Benign										-1.02	Neutral	0.966	Probably Damaging	0.690	Possibly Damaging	2.65	Benign	0.00	Affected	4.32	4	-3	-3	-5.4	-16.04
c.3041G>T	G1014V	Likely Benign		Uncertain		1				-4.612	Likely Benign	0.181	Likely Benign	Likely Benign	0.053	Likely Benign										-2.47	Neutral	0.818	Possibly Damaging	0.377	Benign	2.72	Benign	0.06	Tolerated	3.77	5	-1	-3	4.6	42.08
c.3055C>T	R1019C	Likely Pathogenic		Conflicting		2	6-33443607-C-T	10	6.19e-6	-7.386	In-Between	0.646	Likely Pathogenic	Likely Benign	0.168	Likely Benign										-4.00	Deleterious	0.999	Probably Damaging	0.880	Possibly Damaging	2.36	Pathogenic	0.00	Affected	3.77	5	-4	-3	7.0	-53.05																10.1016/j.ajhg.2020.11.011
c.3056G>T	R1019L	Likely Pathogenic		Uncertain		1	6-33443608-G-T	2	1.24e-6	-5.194	Likely Benign	0.752	Likely Pathogenic	Likely Benign	0.110	Likely Benign										-3.57	Deleterious	0.800	Possibly Damaging	0.573	Possibly Damaging	2.40	Pathogenic	0.01	Affected	3.77	5	-2	-3	8.3	-43.03
c.3119G>T	G1040V	Likely Pathogenic		Uncertain		1	6-33443671-G-T	4	2.48e-6	-3.453	Likely Benign	0.645	Likely Pathogenic	Likely Benign	0.774	Likely Pathogenic										-2.89	Deleterious	0.827	Possibly Damaging	0.456	Possibly Damaging	-0.74	Pathogenic	0.01	Affected	3.77	5	-1	-3	4.6	42.08
c.311G>T	R104L	Likely Benign		Benign		1	6-33432176-G-T	1	6.20e-7	-3.563	Likely Benign	0.578	Likely Pathogenic	Likely Benign	0.170	Likely Benign										-1.38	Neutral	0.001	Benign	0.002	Benign	4.05	Benign	0.00	Affected	4.32	1	-2	-3	8.3	-43.03
c.3142G>C	G1048R	Likely Benign		Uncertain		1				-4.305	Likely Benign	0.435	Ambiguous	Likely Benign	0.503	Likely Pathogenic										-0.54	Neutral	0.919	Possibly Damaging	0.728	Possibly Damaging	2.54	Benign	0.10	Tolerated	3.77	5	-2	-3	-4.1	99.14
c.3151G>T	G1051C			Likely Pathogenic		1				-9.050	Likely Pathogenic	0.122	Likely Benign	Likely Benign	0.497	Likely Benign										-0.90	Neutral	0.971	Probably Damaging	0.750	Possibly Damaging	-0.74	Pathogenic	0.10	Tolerated	3.77	5	-3	-3	2.9	46.09
c.3154G>A	G1052R			Uncertain		1				-9.050	Likely Pathogenic	0.383	Ambiguous	Likely Benign	0.497	Likely Benign										-0.41	Neutral	0.990	Probably Damaging	0.798	Possibly Damaging	3.90	Benign	0.10	Tolerated	3.77	5	-2	-3	-4.1	99.14
c.3179G>T	G1060V	Likely Benign		Benign		1	6-33443731-G-T	1	6.22e-7	-6.966	Likely Benign	0.103	Likely Benign	Likely Benign	0.369	Likely Benign										-0.73	Neutral	0.986	Probably Damaging	0.728	Possibly Damaging	2.63	Benign	0.33	Tolerated	4.32	2	-1	-3	4.6	42.08
c.3181G>T	G1061C	Likely Benign		Conflicting		2	6-33443733-G-T	6	3.73e-6	-9.511	Likely Pathogenic	0.119	Likely Benign	Likely Benign	0.409	Likely Benign										-1.46	Neutral	0.938	Possibly Damaging	0.665	Possibly Damaging	3.97	Benign	0.00	Affected	4.32	2	-3	-3	2.9	46.09
c.3194C>T	P1065L			Likely Benign		1	6-33443746-C-T	14	8.71e-6	-5.085	Likely Benign	0.089	Likely Benign	Likely Benign	0.068	Likely Benign										-2.94	Deleterious	0.950	Possibly Damaging	0.419	Benign	2.01	Pathogenic	0.00	Affected	4.32	2	-3	-3	5.4	16.04
c.3197C>T	P1066L	Likely Benign		Likely Benign		1	6-33443749-C-T	14	8.71e-6	-5.478	Likely Benign	0.092	Likely Benign	Likely Benign	0.173	Likely Benign										-3.68	Deleterious	0.996	Probably Damaging	0.903	Possibly Damaging	2.72	Benign	0.00	Affected	4.32	2	-3	-3	5.4	16.04
c.3260C>T	S1087F			Uncertain		1				-3.843	Likely Benign	0.497	Ambiguous	Likely Benign	0.105	Likely Benign										-2.75	Deleterious	0.990	Probably Damaging	0.796	Possibly Damaging	2.56	Benign	0.03	Affected	3.77	5	-2	-3	3.6	60.10
c.3290C>T	P1097L	Likely Benign		Benign		1				-4.410	Likely Benign	0.145	Likely Benign	Likely Benign	0.131	Likely Benign										-2.07	Neutral	0.611	Possibly Damaging	0.198	Benign	2.64	Benign	0.05	Affected	3.77	5	-3	-3	5.4	16.04
c.3326T>C	L1109P	Likely Benign		Conflicting		2				-5.313	Likely Benign	0.120	Likely Benign	Likely Benign	0.151	Likely Benign										-0.52	Neutral	0.002	Benign	0.003	Benign	2.65	Benign	0.07	Tolerated	4.32	2	-3	-3	-5.4	-16.04
c.3376G>T	G1126C	Likely Benign		Uncertain		1	6-33443928-G-T	11	7.35e-6	-9.389	Likely Pathogenic	0.113	Likely Benign	Likely Benign	0.449	Likely Benign										-1.40	Neutral	0.005	Benign	0.005	Benign	4.74	Benign	0.02	Affected	3.77	5	-3	-3	2.9	46.09
c.3377G>T	G1126V	Likely Benign		Uncertain		1	6-33443929-G-T			-6.536	Likely Benign	0.089	Likely Benign	Likely Benign	0.357	Likely Benign										-1.20	Neutral	0.009	Benign	0.008	Benign	4.76	Benign	0.03	Affected	3.77	5	-1	-3	4.6	42.08
c.3379G>A	G1127R	Likely Benign		Uncertain		1	6-33443931-G-A	2	1.34e-6	-5.949	Likely Benign	0.629	Likely Pathogenic	Likely Benign	0.341	Likely Benign										-0.87	Neutral	0.001	Benign	0.001	Benign	4.86	Benign	0.12	Tolerated	4.32	4	-2	-3	-4.1	99.14
c.3379G>C	G1127R	Likely Benign		Conflicting		2	6-33443931-G-C	16	1.07e-5	-5.949	Likely Benign	0.629	Likely Pathogenic	Likely Benign	0.341	Likely Benign										-0.87	Neutral	0.001	Benign	0.001	Benign	4.86	Benign	0.12	Tolerated	4.32	4	-2	-3	-4.1	99.14
c.3380G>T	G1127V	Likely Benign		Uncertain		1	6-33443932-G-T	1	6.69e-7	-6.097	Likely Benign	0.094	Likely Benign	Likely Benign	0.230	Likely Benign										-1.01	Neutral	0.004	Benign	0.005	Benign	4.81	Benign	0.17	Tolerated	4.32	4	-1	-3	4.6	42.08
c.3386T>C	L1129P	Likely Benign		Uncertain		2				-2.991	Likely Benign	0.154	Likely Benign	Likely Benign	0.432	Likely Benign										0.27	Neutral	0.971	Probably Damaging	0.773	Possibly Damaging	5.44	Benign	0.00	Affected	4.32	4	-3	-3	-5.4	-16.04
c.3413C>A	S1138Y			Uncertain		1	6-33444448-C-A	3	1.86e-6	-6.610	Likely Benign	0.449	Ambiguous	Likely Benign	0.391	Likely Benign										-2.51	Deleterious	0.997	Probably Damaging	0.996	Probably Damaging	5.41	Benign	0.05	Affected	4.32	4	-2	-3	-0.5	76.10
c.3457C>T	R1153W	Likely Pathogenic		Uncertain		2	6-33444492-C-T	2	1.24e-6	-5.812	Likely Benign	0.994	Likely Pathogenic	Likely Pathogenic	0.317	Likely Benign										-5.88	Deleterious	1.000	Probably Damaging	0.998	Probably Damaging	1.46	Pathogenic	0.00	Affected	3.77	5	2	-3	3.6	30.03
c.3614T>C	L1205P	Likely Pathogenic	Coiled-coil	Uncertain		1				-16.878	Likely Pathogenic	1.000	Likely Pathogenic	Likely Pathogenic	0.536	Likely Pathogenic										-5.91	Deleterious	1.000	Probably Damaging	0.999	Probably Damaging	1.45	Pathogenic	0.00	Affected			-3	-3	-5.4	-16.04
c.3640C>T	R1214W	Likely Pathogenic	Coiled-coil	Uncertain		1	6-33446632-C-T	2	1.24e-6	-8.799	Likely Pathogenic	0.710	Likely Pathogenic	Likely Benign	0.143	Likely Benign										-4.95	Deleterious	1.000	Probably Damaging	0.983	Probably Damaging	2.45	Pathogenic	0.00	Affected	3.77	5	2	-3	3.6	30.03
c.3661C>T	R1221W	Likely Pathogenic	Coiled-coil	Conflicting		3	6-33446653-C-T	1	6.20e-7	-10.938	Likely Pathogenic	0.651	Likely Pathogenic	Likely Benign	0.174	Likely Benign										-4.57	Deleterious	1.000	Probably Damaging	0.987	Probably Damaging	2.50	Benign	0.01	Affected	3.77	5	2	-3	3.6	30.03
c.379C>T	R127W			Uncertain		1				-4.776	Likely Benign	0.806	Likely Pathogenic	Ambiguous	0.118	Likely Benign										-2.98	Deleterious	0.989	Probably Damaging	0.420	Benign	3.88	Benign	0.00	Affected			2	-3	3.6	30.03
c.3820C>T	R1274C			Uncertain		1	6-33447868-C-T			-6.467	Likely Benign	0.439	Ambiguous	Likely Benign	0.170	Likely Benign										-5.22	Deleterious	1.000	Probably Damaging	0.996	Probably Damaging	2.46	Pathogenic	0.00	Affected	3.77	5	-4	-3	7.0	-53.05
c.3848C>T	P1283L	Likely Benign		Benign		1	6-33447896-C-T	32	2.06e-5	-3.740	Likely Benign	0.093	Likely Benign	Likely Benign	0.047	Likely Benign										-1.04	Neutral	0.005	Benign	0.003	Benign	2.76	Benign	0.06	Tolerated	3.77	5	-3	-3	5.4	16.04
c.3860C>T	P1287L	Likely Benign		Conflicting		2	6-33447908-C-T			-2.800	Likely Benign	0.117	Likely Benign	Likely Benign	0.061	Likely Benign										-1.66	Neutral	0.021	Benign	0.017	Benign	2.76	Benign	0.02	Affected	3.77	5	-3	-3	5.4	16.04
c.391G>C	G131R			Uncertain		1				-6.564	Likely Benign	0.983	Likely Pathogenic	Likely Pathogenic	0.099	Likely Benign										-3.82	Deleterious	0.983	Probably Damaging	0.656	Possibly Damaging	3.92	Benign	0.00	Affected	3.61	5	-2	-3	-4.1	99.14
c.3920C>T	P1307L	Likely Benign		Benign		1	6-33451794-C-T	11	6.82e-6	-4.044	Likely Benign	0.144	Likely Benign	Likely Benign	0.292	Likely Benign										-1.49	Neutral	0.779	Possibly Damaging	0.220	Benign	2.82	Benign	0.04	Affected	3.77	5	-3	-3	5.4	16.04
c.3922C>T	R1308C			Conflicting		2	6-33451796-C-T	4	2.48e-6	-4.994	Likely Benign	0.421	Ambiguous	Likely Benign	0.352	Likely Benign										-4.89	Deleterious	0.999	Probably Damaging	0.993	Probably Damaging	2.31	Pathogenic	0.00	Affected	3.77	5	-4	-3	7.0	-53.05
c.3932T>C	L1311P	Likely Benign		Likely Benign		1	6-33451806-T-C	1	6.21e-7	-1.831	Likely Benign	0.079	Likely Benign	Likely Benign	0.123	Likely Benign										-0.52	Neutral	0.579	Possibly Damaging	0.335	Benign	2.72	Benign	0.18	Tolerated	3.77	5	-3	-3	-5.4	-16.04
c.3941C>T	P1314L	Likely Benign		Likely Benign		1	6-33451815-C-T	2	1.24e-6	-4.040	Likely Benign	0.118	Likely Benign	Likely Benign	0.049	Likely Benign										-0.20	Neutral	0.421	Benign	0.066	Benign	4.19	Benign	0.05	Affected	3.77	5	-3	-3	5.4	16.04
c.3943T>C	W1315R	Likely Benign		Uncertain		1				0.205	Likely Benign	0.660	Likely Pathogenic	Likely Benign	0.114	Likely Benign										1.31	Neutral	0.000	Benign	0.001	Benign	4.37	Benign	0.91	Tolerated	3.77	5	2	-3	-3.6	-30.03
c.3974C>T	P1325L	Likely Benign		Uncertain		1	6-33451848-C-T			-5.256	Likely Benign	0.085	Likely Benign	Likely Benign	0.146	Likely Benign										-1.05	Neutral	0.000	Benign	0.000	Benign	4.05	Benign	0.00	Affected	4.32	1	-3	-3	5.4	16.04
c.3977C>T	P1326L	Likely Benign		Uncertain		1				-5.541	Likely Benign	0.115	Likely Benign	Likely Benign	0.117	Likely Benign										-1.06	Neutral	0.999	Probably Damaging	0.994	Probably Damaging	3.62	Benign	0.00	Affected	3.77	5	-3	-3	5.4	16.04
c.3980C>T	P1327L	Likely Benign		Uncertain		1	6-33451854-C-T	2	1.28e-6	-5.264	Likely Benign	0.242	Likely Benign	Likely Benign	0.142	Likely Benign										-1.24	Neutral	0.994	Probably Damaging	0.908	Possibly Damaging	4.12	Benign	0.10	Tolerated	3.77	5	-3	-3	5.4	16.04
c.406C>T	R136W	Likely Pathogenic		Uncertain		2				-10.453	Likely Pathogenic	0.989	Likely Pathogenic	Likely Pathogenic	0.237	Likely Benign										-4.71	Deleterious	0.965	Probably Damaging	0.416	Benign	3.45	Benign	0.00	Affected	3.61	5	2	-3	3.6	30.03
c.484C>G	R162G	Likely Benign		Uncertain		1				-6.985	Likely Benign	0.664	Likely Pathogenic	Likely Benign	0.190	Likely Benign										-0.73	Neutral	0.487	Possibly Damaging	0.272	Benign	4.09	Benign	0.78	Tolerated	3.74	4	-2	-3	4.1	-99.14
c.484C>T	R162C			Pathogenic		2				-8.157	Likely Pathogenic	0.787	Likely Pathogenic	Ambiguous	0.150	Likely Benign										-2.05	Neutral	0.988	Probably Damaging	0.513	Possibly Damaging	4.00	Benign	0.11	Tolerated	3.74	4	-4	-3	7.0	-53.05
c.508C>T	R170W	Likely Pathogenic		Uncertain		2				-11.660	Likely Pathogenic	0.978	Likely Pathogenic	Likely Pathogenic	0.241	Likely Benign										-4.28	Deleterious	0.999	Probably Damaging	0.849	Possibly Damaging	3.84	Benign	0.00	Affected	3.74	4	2	-3	3.6	30.03
c.50C>T	S17F	Likely Benign		Uncertain		1	6-33420314-C-T	10	6.49e-6	-3.888	Likely Benign	0.637	Likely Pathogenic	Likely Benign	0.048	Likely Benign										-0.99	Neutral	0.486	Possibly Damaging	0.032	Benign	3.99	Benign	0.00	Affected	4.32	1	-2	-3	3.6	60.10
c.514C>T	R172W	Likely Pathogenic		Uncertain		2	6-33435156-C-T	9	5.58e-6	-10.258	Likely Pathogenic	0.878	Likely Pathogenic	Ambiguous	0.228	Likely Benign										-3.61	Deleterious	0.997	Probably Damaging	0.803	Possibly Damaging	3.95	Benign	0.00	Affected	3.61	5	2	-3	3.6	30.03
c.59C>T	P20L	Likely Benign		Uncertain		3				-3.289	Likely Benign	0.464	Ambiguous	Likely Benign	0.100	Likely Benign										-0.44	Neutral	0.909	Possibly Damaging	0.713	Possibly Damaging	4.27	Benign	0.00	Affected	4.32	1	-3	-3	5.4	16.04
c.791T>C	L264P (3D Viewer)	Likely Pathogenic	C2	Uncertain		1				-12.285	Likely Pathogenic	1.000	Likely Pathogenic	Likely Pathogenic	0.767	Likely Pathogenic	5.73	Destabilizing	0.3	6.57	Destabilizing	6.15	Destabilizing	2.65	Destabilizing	-6.43	Deleterious	1.000	Probably Damaging	0.999	Probably Damaging	0.49	Pathogenic	0.00	Affected			-3	-3	-5.4	-16.04
c.851T>C	L284P	Likely Pathogenic	C2	Likely Pathogenic		1				-15.588	Likely Pathogenic	1.000	Likely Pathogenic	Likely Pathogenic	0.794	Likely Pathogenic	5.83	Destabilizing	0.2	5.81	Destabilizing	5.82	Destabilizing	1.89	Destabilizing	-6.17	Deleterious	1.000	Probably Damaging	0.999	Probably Damaging	1.64	Pathogenic	0.00	Affected			-3	-3	-5.4	-16.04
c.700C>T	R234W (3D Viewer)	Likely Pathogenic	PH	Uncertain		1	6-33435551-C-T	3	1.86e-6	-12.625	Likely Pathogenic	0.947	Likely Pathogenic	Ambiguous	0.805	Likely Pathogenic	0.96	Ambiguous	0.3	0.69	Ambiguous	0.83	Ambiguous	0.13	Likely Benign	-5.52	Deleterious	0.997	Probably Damaging	0.803	Possibly Damaging	5.76	Benign	0.01	Affected	3.40	14	2	-3	3.6	30.03	262.8	39.6	-0.1	0.0	-0.2	0.2		X						Potentially Pathogenic	The guanidinium group of Arg234, located in a β-α loop between an anti-parallel β sheet strand (residues Gly227-Phe231) and an α helix (res. Ala236-Val250), forms a salt bridge with the carboxylate group of Glu238 in the α helix. Occasionally, it also bonds with the GAP domain residues Ser678 and Glu680. Thus, the positively charged Arg234 could contribute to the tertiary structure assembly between the PH and GAP domains. In contrast, the indole side chain of Trp234 in the variant is located on the protein surface in the variant simulations and is unable to form any interactions.
c.742C>T	R248W (3D Viewer)	Likely Pathogenic	PH	Uncertain		1				-11.647	Likely Pathogenic	0.991	Likely Pathogenic	Likely Pathogenic	0.699	Likely Pathogenic	1.17	Ambiguous	0.3	-0.20	Likely Benign	0.49	Likely Benign	0.89	Ambiguous	-6.98	Deleterious	1.000	Probably Damaging	0.948	Probably Damaging	5.62	Benign	0.00	Affected	3.41	14	2	-3	3.6	30.03	266.4	42.3	0.0	0.0	0.3	0.1		X						Potentially Pathogenic	The guanidinium group of Arg248, located on an α helix (res. Ala236-Val250), forms two very stable salt bridges with Asp255 (from a short α helical section, res. Lys254-Asn256) and Glu244 (from a nearby loop) in the WT simulations. In the variant simulations, the indole group of Trp248 cannot form any salt bridges, which could negatively affect the tertiary structure assembly of the PH domain. Instead, in the variant simulations, the indole ring of Trp248 stacks against Pro252, which makes a turn after the α helix.
c.775C>T	R259W (3D Viewer)	Likely Pathogenic	C2	Uncertain		1				-12.186	Likely Pathogenic	0.985	Likely Pathogenic	Likely Pathogenic	0.691	Likely Pathogenic	1.95	Ambiguous	0.8	0.51	Ambiguous	1.23	Ambiguous	0.51	Ambiguous	-7.35	Deleterious	1.000	Probably Damaging	0.993	Probably Damaging	5.76	Benign	0.00	Affected	3.39	15	2	-3	3.6	30.03	254.0	40.0	0.2	0.2	0.2	0.4	X	X					X	Potentially Pathogenic	The guanidinium group of Arg259, located at the beginning of an anti-parallel β sheet strand (res. Arg259-Arg272), forms salt bridges with the carboxylate groups of Asp684 at the end of an α helix (res. Ile683-Gln702, GAP domain) and Asp261 on the same β strand. The Arg259 side chain also frequently forms hydrogen bonds with the backbone carbonyl groups of Ser257, Asn256, and Asp255. In the variant simulations, the indole ring of the Trp259 side chain cannot form salt bridges or maintain hydrogen bonding with the carboxylate group of Asp684 or other nearby residues. Notably, the amino group of the Lys254 side chain maintains a salt bridge with Asp684 and Glu244 throughout the variant simulations, while it forms a cation-π bond with the indole ring of Trp259 in the variant. This salt bridge is not maintained in the WT simulations. Additionally, the partially or loosely α helical conformation of a lysine-containing loop (res. Lys251-Ser257), which extends to a nearby α helix (res. Met414-Asn426), could be stabilized due to the residue swap. Moreover, the bulky size of the Trp259 side chain requires nearby residues to adjust their positioning to accommodate the introduced residue, weakening the tertiary structure assembly between the C2, PH, and GAP domains. The residue swap potentially causes more severe effects during protein folding or for the SynGAP-membrane interaction than the solvent-only simulations imply.
c.835C>T	R279W (3D Viewer)	Likely Pathogenic	C2	Uncertain		1				-11.417	Likely Pathogenic	0.942	Likely Pathogenic	Ambiguous	0.485	Likely Benign	2.00	Destabilizing	0.8	1.47	Ambiguous	1.74	Ambiguous	0.80	Ambiguous	-6.29	Deleterious	1.000	Probably Damaging	0.998	Probably Damaging	1.88	Pathogenic	0.00	Affected	3.39	18	2	-3	3.6	30.03	270.0	38.3	0.1	0.0	0.3	0.0								Uncertain	The guanidinium group of Arg279, located at the beginning of an anti-parallel β sheet strand (res. Arg279-Leu286), can form hydrogen bond with the backbone carbonyl groups of nearby loop residues (e.g., Ser296, Ser331, and As332) and form salt bridges with the carboxylate groups of Asp330 and Asp332. In the WT simulations, Arg279 sporadically forms a salt bridge even with the carboxylate group of Glu613, loosely connecting the C2 domain and GAP domain. Meanwhile, the indole ring of the Trp279 side chain is unable to hydrogen bond with the loop residues in the variant simulations. The lack of hydrogen bond or salt bridge formation with the loop residues could be significant, as Arg279 and the loops face the polar head group region of the membrane. Thus, although Trp279 could interact with the membrane surface as a “lipid anchor,” any changes to the wider loop dynamics could still adversely affect the formation of a stable SynGAP-membrane association. However, no definite conclusions on the effect of the residue swap on the SynGAP-membrane association can be drawn from solvent-only simulations.
c.844T>C	C282R (3D Viewer)	Likely Pathogenic	C2	Pathogenic		2				-16.378	Likely Pathogenic	0.999	Likely Pathogenic	Likely Pathogenic	0.466	Likely Benign	3.13	Destabilizing	0.6	1.58	Ambiguous	2.36	Destabilizing	1.70	Destabilizing	-11.03	Deleterious	0.999	Probably Damaging	0.998	Probably Damaging	1.63	Pathogenic	0.00	Affected	3.39	18	-4	-3	-7.0	53.05	297.4	-98.2	-0.1	0.1	0.5	0.0	X		X				X	Potentially Pathogenic	The thiol-containing side chain of Cys282, located at the beginning of an anti-parallel β sheet strand (res. Arg279-Leu286), is packed against multiple hydrophobic residues (e.g., Ile268, Leu284, Trp308, Leu327). In the variant simulations, the bulky side chain of Arg282 with its positively charged guanidinium group is not suitable for this hydrophobic niche. Consequently, the hydrophobic residues must either make room to accommodate Arg282 or it must escape the hydrophobic C2 domain core.As a result, new hydrogen bonds are formed with the backbone carbonyl groups of the surrounding β sheet residues Ala399, Leu325, and His326, which decreases the unity of the secondary structure elements. Notably, it is likely that the residue swap causes major problems during the C2 domain folding that are not visible in the variant simulations. In fact, even increased lability in the C2 domain could adversely affect the establishment of a stable SynGAP-membrane association.
c.859G>T	D287Y (3D Viewer)	Likely Pathogenic	C2	Likely Pathogenic		1				-12.877	Likely Pathogenic	0.999	Likely Pathogenic	Likely Pathogenic	0.663	Likely Pathogenic	0.21	Likely Benign	0.2	0.48	Likely Benign	0.35	Likely Benign	0.27	Likely Benign	-8.27	Deleterious	1.000	Probably Damaging	0.999	Probably Damaging	1.51	Pathogenic	0.00	Affected	3.38	23	-4	-3	2.2	48.09	257.8	-44.4	-0.6	1.6	0.2	0.3	X	X						Potentially Pathogenic	The carboxylate group of Asp287, located at the beginning of a β hairpin loop linking two anti-parallel β sheet strands (res. Arg279-Leu286, res. Met289-Pro298), maintains a salt bridge with the guanidinium group of Arg324 in the β sheet during the WT simulations. In the variant simulations, the phenol group of the Tyr287 side chain is unable to form a salt bridge with the guanidinium group of Arg324, which could weaken the tertiary structure assembly of the C2 domain. However, the phenol group of Tyr287 frequently stacks with the Arg324 guanidinium side chain, which could help maintain the tertiary structure, especially compared to the D287H variant. The destabilization of the C2 domain could adversely affect the stability of the SynGAP-membrane association.
c.877C>T	R293C (3D Viewer)	Likely Pathogenic	C2	Uncertain		1	6-33437782-C-T	3	1.86e-6	-12.844	Likely Pathogenic	0.985	Likely Pathogenic	Likely Pathogenic	0.579	Likely Pathogenic	1.38	Ambiguous	0.1	0.62	Ambiguous	1.00	Ambiguous	0.02	Likely Benign	-7.35	Deleterious	1.000	Probably Damaging	0.998	Probably Damaging	1.46	Pathogenic	0.00	Affected	3.38	23	-4	-3	7.0	-53.05	226.0	96.5	0.0	0.0	0.1	0.1		X		X			X	Potentially Pathogenic	The guanidinium group of the Arg293 side chain, located in an anti-parallel β sheet strand (res. Met289-Pro298), packs against the phenol ring of the Tyr281 side chain or forms a salt bridge with the carboxylate group of Glu283 on the outer side of the C2 domain. The positively charged guanidinium side chain of arginine is on the outside surface of the hydrophobic C2 domain, resulting in a twist in the β strand. Although this twist is maintained in the variant simulations, replacing the positively charged residue with a more hydrophobic one, such as cysteine, could remove the twist during protein folding.Because Arg293 is positioned at the C2 and PH domain interface, the residue swap could significantly impact the tertiary structure assembly. Notably, Arg293 is located at the SynGAP-Ras interface, and its role in complex formation cannot be fully understood through solvent-only simulations.
c.895C>T	R299C (3D Viewer)	Likely Pathogenic	C2	Conflicting		2	6-33437800-C-T	3	1.86e-6	-6.326	Likely Benign	0.572	Likely Pathogenic	Likely Benign	0.344	Likely Benign	1.85	Ambiguous	0.4	0.61	Ambiguous	1.23	Ambiguous	0.76	Ambiguous	-3.54	Deleterious	1.000	Probably Damaging	0.998	Probably Damaging	1.65	Pathogenic	0.06	Tolerated	3.39	19	-4	-3	7.0	-53.05	210.7	91.3	0.1	0.0	0.0	0.2	X	X						Potentially Pathogenic	The guanidinium group of Arg299, located in a β hairpin loop linking two anti-parallel β sheet strands (res. Met289-Pro298, res. Thr305-Asn315), forms hydrogen bonds that stabilize the tight turn. In the WT simulations, the Arg299 side chain hydrogen bonds with the loop backbone carbonyl groups (e.g., Ser302, Thr305, Leu274, Gly303), the hydroxyl group of Ser300, and even forms a salt bridge with the carboxylate group of Asp304.In the variant simulations, the thiol group of the Cys299 side chain is unable to form any of these well-coordinated or strong interactions, which could affect the initial formation of the secondary hairpin loop during folding. β hairpins are potential nucleation sites during the initial stages of protein folding, so even minor changes in them could be significant. Moreover, the positively charged Arg299 side chain faces the polar head group region of the inner leaflet membrane and could directly anchor the C2 domain to the membrane. In short, the residue swap could negatively affect both protein folding and the stability of the SynGAP-membrane association.
c.917T>A	V306D (3D Viewer)	Likely Pathogenic	C2	Uncertain		1				-18.289	Likely Pathogenic	0.986	Likely Pathogenic	Likely Pathogenic	0.530	Likely Pathogenic	4.40	Destabilizing	0.3	4.29	Destabilizing	4.35	Destabilizing	2.44	Destabilizing	-5.44	Deleterious	1.000	Probably Damaging	0.999	Probably Damaging	1.74	Pathogenic	0.00	Affected	3.38	19	-2	-3	-7.7	15.96	212.3	-18.3	-0.2	0.4	0.0	0.2	X		X				X	Potentially Pathogenic	The isopropyl group of Val396, located at the beginning of an anti-parallel β sheet strand (res. Thr305-Asn315), packs against multiple hydrophobic residues (e.g., Leu274, Trp308, Ala271) in the WT simulations. However, in the variant simulations, the negatively charged carboxylate group of the Asp306 side chain is not suitable for this hydrophobic niche. Consequently, the side chain moves out to interact with Ser300 in the β strand (res. Met289-Arg299) and the guanidinium group of Arg299 in the β hairpin loop.In the third simulation, the residue swap disrupts the C2 domain secondary structure and tertiary assembly to a large degree when the amino group of the Lys297 side chain rotates to form a salt bridge with Asp306. This drastic effect could potentially reflect the challenge presented by the residue swap during the C2 domain folding. Because the residue swap affects the C2 domain structure, the SynGAP-membrane association could also be impacted. However, this is beyond the scope of the solvent-only simulations to unravel.
c.922T>C	W308R (3D Viewer)	Likely Pathogenic	C2	Pathogenic		1				-12.264	Likely Pathogenic	1.000	Likely Pathogenic	Likely Pathogenic	0.868	Likely Pathogenic	5.40	Destabilizing	0.5	4.27	Destabilizing	4.84	Destabilizing	1.88	Destabilizing	-12.87	Deleterious	1.000	Probably Damaging	0.999	Probably Damaging	0.48	Pathogenic	0.00	Affected	3.38	19	2	-3	-3.6	-30.03	290.4	-26.7	-0.1	0.1	0.0	0.2	X		X				X	Potentially Pathogenic	The indole ring of Trp308, located in an anti-parallel β sheet strand (res. Thr305-Asn315), packs against multiple hydrophobic residues (e.g., Ile268, Val306, Cys282). The indole group of Trp308 also hydrogen bonds with the backbone atoms of the C2 domain residues forming the anti-parallel β sheet (e.g., Tyr280, Thr294). The guanidinium group of Arg308 is comparably sized to the tryptophan it replaced; however, it is also positively charged.In the variant simulations, the charged side chain remains buried deep in the hydrophobic part of the C2 domain, where it forms new hydrogen bonds with the backbone carbonyl atoms of surrounding residues (e.g., Val306, Ile268). However, the residue swap is likely to disrupt the hydrophobic packing during folding. At a minimum, the residue swap could affect the C2 domain stability and membrane association.
c.953C>T	P318L (3D Viewer)	Likely Pathogenic	C2	Uncertain		3	6-33437858-C-T	3	1.86e-6	-10.090	Likely Pathogenic	0.958	Likely Pathogenic	Likely Pathogenic	0.624	Likely Pathogenic	1.33	Ambiguous	0.1	0.26	Likely Benign	0.80	Ambiguous	0.43	Likely Benign	-8.96	Deleterious	1.000	Probably Damaging	0.999	Probably Damaging	1.82	Pathogenic	0.03	Affected	3.38	23	-3	-3	5.4	16.04	228.6	-68.9	-0.7	0.7	-0.4	0.1						X		Potentially Benign	The cyclic five-membered pyrrolidine ring of Pro318, located in a β hairpin loop linking two anti-parallel β sheet strands (res. Asp330-Ala322, res. Thr305-Asn315), packs against the hydrophobic side chain of Ile205 at the end of the anti-parallel β sheet in the PH domain. In the variant simulations, the iso-butyl side chain of Leu318 is unable to do the same, potentially weakening the PH and C2 domain association. Importantly, the residue swap could also affect loop formation during folding, as proline can make tighter turns than leucine. Because the residue swap could affect the C2 domain stability, it could also negatively impact the SynGAP-membrane association.
c.968T>C	L323P (3D Viewer)	Likely Pathogenic	C2	Uncertain		1				-12.507	Likely Pathogenic	0.998	Likely Pathogenic	Likely Pathogenic	0.762	Likely Pathogenic	3.39	Destabilizing	0.6	8.46	Destabilizing	5.93	Destabilizing	2.20	Destabilizing	-4.80	Deleterious	0.999	Probably Damaging	0.977	Probably Damaging	0.59	Pathogenic	0.01	Affected	4.29	398	-3	-3	-5.4	-16.04	201.9	68.2	0.0	0.1	0.6	0.3	X							Potentially Pathogenic	The iso-butyl side chain of Leu323, located at the beginning of an anti-parallel β sheet strand (res. Ala322-Asp330), packs against multiple hydrophobic leucine residues (e.g., Leu264, Leu266, Leu284, Leu286). In contrast, in the variant simulations, the less bulky cyclic five-membered pyrrolidine ring of Pro323 cannot fill the hydrophobic space as effectively as the branched hydrocarbon side chain of leucine. Notably, the backbone amide group of Leu323 forms a hydrogen bond with the backbone carbonyl group of Cys285. Pro323 cannot form this bond due to the absence of the backbone amide group, resulting in partial unfolding of the anti-parallel β sheet end in the variant simulations.
c.970C>T	R324W (3D Viewer)	Likely Pathogenic	C2	Uncertain		1	6-33437875-C-T	2	1.24e-6	-12.906	Likely Pathogenic	0.694	Likely Pathogenic	Likely Benign	0.481	Likely Benign	1.49	Ambiguous	0.3	0.56	Ambiguous	1.03	Ambiguous	0.66	Ambiguous	-3.12	Deleterious	1.000	Probably Damaging	0.998	Probably Damaging	1.82	Pathogenic	0.16	Tolerated	3.39	22	2	-3	3.6	30.03	256.6	39.1	0.0	0.1	0.3	0.2		X						Potentially Pathogenic	The guanidinium group of Arg324, located at the end of an anti-parallel β sheet strand (res. Ala322-Asp330), faces outward and frequently forms a salt bridge with the carboxylate group of the Asp288 side chain, which is part of a β strand end (res. Met289-Pro298). In the variant simulations, the indole ring of the Trp324 side chain cannot maintain a similar interaction with the negatively charged carboxylate side chain of Asp288, potentially compromising the folding of the anti-parallel β sheet assembly. However, the residue swap does not appear to negatively impact the protein structure or its integrity based on the simulations.
c.980T>C	L327P (3D Viewer)	Likely Pathogenic	C2	Pathogenic		3				-16.602	Likely Pathogenic	0.999	Likely Pathogenic	Likely Pathogenic	0.658	Likely Pathogenic	5.38	Destabilizing	0.1	4.00	Destabilizing	4.69	Destabilizing	2.62	Destabilizing	-5.97	Deleterious	1.000	Probably Damaging	0.999	Probably Damaging	1.52	Pathogenic	0.01	Affected	3.38	23	-3	-3	-5.4	-16.04	221.7	69.4	0.1	0.0	0.6	0.1	X							Potentially Pathogenic	The backbone amide group of Leu327, located in the middle of an anti-parallel β sheet strand (res. Ala322-Asp330), forms a hydrogen bond with the carbonyl group of Gly344 on a neighboring β strand (res. Lys336-Pro349) in the WT simulations. In contrast, in the variant simulations, the introduction of Pro327 destabilizes the hydrogen bonding between the two anti-parallel β strands because proline lacks the backbone amide group altogether. Additionally, in the WT simulations, the iso-butyl side chain of Leu327 packs against multiple hydrophobic residues (e.g., Leu274, V400, Val343), whereas the less bulky cyclic five-membered pyrrolidine ring of Pro327 cannot fill the same space as effectively. Thus, although no large-scale unfolding is observed during the variant simulations, the residue swap is likely to cause severe problems for the correct C2 domain folding, which could also affect the SynGAP-membrane association.	10.1016/j.ajhg.2020.11.011
c.1025A>C	Y342S (3D Viewer)	Likely Pathogenic	C2	Uncertain		2				-7.996	In-Between	0.925	Likely Pathogenic	Ambiguous	0.407	Likely Benign	3.03	Destabilizing	0.1	2.87	Destabilizing	2.95	Destabilizing	0.93	Ambiguous	-6.60	Deleterious	1.000	Probably Damaging	0.998	Probably Damaging	1.75	Pathogenic	0.04	Affected	3.37	25	-3	-2	0.5	-76.10	200.1	77.8	0.0	0.0	-0.2	0.1								Potentially Pathogenic	The phenol ring of Tyr342, located at the end of an anti-parallel β sheet strand (res. Gly341-Pro349), faces outward in the C2 domain. In the WT simulations, the phenol ring of Tyr342 contributes to a triple tyrosine stack (Tyr342, Tyr328, and Tyr281) that links together three anti-parallel β sheet strands. Additionally, it shields Gly344 from the solvent, reducing its exposure and providing stability for the β-sandwich. This motif also contributes to a twist formation in the β sheet.In the variant simulations, the Ser342 side chain cannot participate in the stack formation. Instead, the hydroxyl group of the Ser342 side chain forms a hydrogen bond with the imidazole ring of His326 in a neighboring β strand (res. Ala322-Asp330). This disrupts the formation of a hydrogen bond between His326 and the carboxylate group of the Glu283 side chain from another β strand (res. Arg279-Cys285). Although these changes in surface interactions could weaken the characteristic twist that strengthens the β sheet fold, no major structural effects are observed in the variant simulations. The residue swap could also affect the SynGAP-membrane association, as the hydroxyl group of Ser342 could form hydrogen bonds with membrane-facing loop residues. However, this phenomenon cannot be addressed using solvent-only simulations.
c.1025A>G	Y342C (3D Viewer)	Likely Pathogenic	C2	Benign/Likely benign		2	6-33437930-A-G	21	1.30e-5	-7.596	In-Between	0.682	Likely Pathogenic	Likely Benign	0.404	Likely Benign	2.48	Destabilizing	0.1	2.73	Destabilizing	2.61	Destabilizing	0.92	Ambiguous	-6.67	Deleterious	1.000	Probably Damaging	0.999	Probably Damaging	1.72	Pathogenic	0.02	Affected	3.37	25	0	-2	3.8	-60.04	242.4	62.8	0.1	0.0	-0.1	0.2								Potentially Pathogenic	The phenol ring of Tyr342, located at the end of an anti-parallel β sheet strand (res. Gly341-Pro349), faces outward in the C2 domain. This phenol ring contributes to a triple tyrosine stack (Tyr342, Tyr328, and Tyr281) that links together three anti-parallel β sheet strands. Additionally, it shields Gly344 from the solvent, reducing its exposure and providing stability for the β-sandwich. This motif also contributes to a twist formation in the β sheet.In the variant simulations, the Cys342 side chain cannot participate in the stack formation. Instead, its thiol group forms a hydrogen bond with the backbone carbonyl group of Leu327. Although these changes in surface interactions could weaken the characteristic twist that strengthens the β sheet fold, no major structural effects are observed in the variant simulations. The residue swap could also affect the SynGAP-membrane association; however, this phenomenon cannot be addressed using solvent-only simulations. Notably, the thiol group of cysteine is not a particularly strong hydrogen-bonding partner, which could mitigate the negative effects of the residue swap.
c.1118G>A	G373E (3D Viewer)		C2	Uncertain		1				-7.281	In-Between	0.569	Likely Pathogenic	Likely Benign	0.420	Likely Benign	4.13	Destabilizing	3.2	0.52	Ambiguous	2.33	Destabilizing	-0.02	Likely Benign	-0.69	Neutral	0.001	Benign	0.000	Benign	3.90	Benign	0.01	Affected			0	-2	-3.1	72.06
c.1121C>A	S374Y (3D Viewer)		C2	Uncertain		1				-7.774	In-Between	0.344	Ambiguous	Likely Benign	0.310	Likely Benign	0.71	Ambiguous	1.2	0.66	Ambiguous	0.69	Ambiguous	-0.02	Likely Benign	-1.18	Neutral	0.875	Possibly Damaging	0.271	Benign	5.41	Benign	0.01	Affected	4.32	13	-3	-2	-0.5	76.10	237.3	-76.9	0.5	0.4	0.5	0.3								Uncertain	Ser374 is located in the Gly-rich Ω loop (res. Pro364-Pro398) between two anti-parallel β sheet strands (res. Thr359-Pro364, res. Ala399-Ile411). Because the Ω loop is assumed to directly interact with the membrane, it moves arbitrarily throughout the WT solvent simulations. The Ω loop potentially plays a crucial role in the SynGAP-membrane complex association, stability, and dynamics. However, this aspect cannot be fully addressed through solvent simulations alone.Ω loops are known to play major roles in protein functions that require flexibility, and thus, large and relatively hydrophobic residues like tyrosine are rarely tolerated. Additionally, the hydroxyl group of Tyr374 frequently forms various hydrogen bonds with other loop residues in the variant simulations. Although no negative structural effects are observed in the variant simulations, Tyr374 may exert drastic effects on the SynGAP-membrane complex dynamics and stability. However, since the effect on Gly-rich Ω loop dynamics can only be studied through the SynGAP-membrane complex, no definite conclusions can be drawn.
c.1136C>T	S379L (3D Viewer)	Likely Benign	C2	Benign		1	6-33438041-C-T	8	4.05e-5	-5.641	Likely Benign	0.173	Likely Benign	Likely Benign	0.469	Likely Benign	0.39	Likely Benign	0.2	3.38	Destabilizing	1.89	Ambiguous	-0.52	Ambiguous	-0.85	Neutral	0.015	Benign	0.002	Benign	3.83	Benign	0.04	Affected	4.32	11	-3	-2	4.6	26.08	251.9	-48.1	0.6	1.1	0.0	0.5								Uncertain	Ser379 is located in the Gly-rich Ω loop (res. Pro364-Pro398) between two anti-parallel β sheet strands (res. Thr359-Pro364, res. Ala399-Ile411). Because the Ω loop is assumed to directly interact with the membrane, it moves arbitrarily throughout the WT solvent simulations. The Ω loop potentially plays a crucial role in the SynGAP-membrane complex association, stability, and dynamics. However, this aspect cannot be fully addressed through solvent simulations alone.Ω loops are known to play major roles in protein functions that require flexibility, and thus hydrophobic residues like leucine are rarely tolerated. Although no negative structural effects are observed in the variant simulations, Leu379 may exert drastic effects on the SynGAP-membrane complex dynamics and stability. However, since the effect on Gly-rich Ω loop dynamics can only be studied through the SynGAP-membrane complex, no definite conclusions can be drawn.
c.1154C>T	S385L (3D Viewer)	Likely Benign	C2	Uncertain		2	6-33438059-C-T	9	4.60e-5	-6.018	Likely Benign	0.167	Likely Benign	Likely Benign	0.304	Likely Benign	0.16	Likely Benign	0.1	0.08	Likely Benign	0.12	Likely Benign	-0.26	Likely Benign	-0.68	Neutral	0.829	Possibly Damaging	0.706	Possibly Damaging	4.63	Benign	0.01	Affected	4.32	3	-3	-2	4.6	26.08	244.6	-50.1	0.0	0.6	-0.1	0.1								Uncertain	Ser385 is located in the Gly-rich Ω loop (res. Pro364-Pro398) between two anti-parallel β sheet strands (res. Thr359-Pro364, res. Ala399-Ile411). Because the Ω loop is assumed to directly interact with the membrane, it moves arbitrarily throughout the WT solvent simulations. The Ω loop potentially plays a crucial role in the SynGAP-membrane complex association, stability, and dynamics. However, this aspect cannot be fully addressed through solvent simulations alone.Ω loops are known to play major roles in protein functions that require flexibility, and thus hydrophobic residues like leucine are rarely tolerated. Although no negative structural effects are observed in the variant simulations, Leu385 may exert drastic effects on the SynGAP-membrane complex dynamics and stability. However, since the effects on Gly-rich Ω loop dynamics can only be studied through the SynGAP-membrane complex, no definite conclusions can be drawn.
c.1169G>A	G390E (3D Viewer)		C2	Uncertain		1				-7.913	In-Between	0.646	Likely Pathogenic	Likely Benign	0.575	Likely Pathogenic	2.61	Destabilizing	0.9	4.28	Destabilizing	3.45	Destabilizing	0.47	Likely Benign	-0.87	Neutral	0.276	Benign	0.045	Benign	1.32	Pathogenic	0.05	Affected	4.32	8	0	-2	-3.1	72.06	241.5	-108.4	0.6	0.5	-0.1	0.1								Uncertain	Gly390 is located in the Gly-rich Ω loop (res. Pro364-Pro398) between two anti-parallel β sheet strands (res. Thr359-Pro364 and res. Ala399-Ile411). The Ω loop is assumed to directly interact with the membrane, and it is observed to move arbitrarily throughout the WT solvent simulations. This loop potentially plays a crucial role in the SynGAP-membrane complex association, stability, and dynamics. However, this aspect cannot be fully addressed through solvent simulations alone.Ω loops are known to play significant roles in protein functions that require flexibility, and so they are rich in glycine residues, prolines, and to a lesser extent, small hydrophilic residues to ensure maximum flexibility. Thus, the variant’s Glu390 may not be as well tolerated in the Ω loop. Additionally, the carboxylate group of Glu390 occasionally forms H-bonds with other loop residues in the variant simulations. The interaction between the acidic carboxylate side chain and the acidic membrane lipids may further influence the SynGAP-membrane complex. However, since the effects on the Gly-rich Ω loop dynamics can only be well studied through the SynGAP-membrane complex, no definite conclusions can be drawn.
c.1436G>C	R479P (3D Viewer)	Likely Pathogenic	GAP	Uncertain		1				-11.795	Likely Pathogenic	0.938	Likely Pathogenic	Ambiguous	0.277	Likely Benign	2.86	Destabilizing	0.2	3.88	Destabilizing	3.37	Destabilizing	0.81	Ambiguous	-3.52	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	3.41	Benign	0.18	Tolerated			0	-2	2.9	-59.07
c.1199T>A	V400E (3D Viewer)	Likely Pathogenic	C2	Uncertain		1				-13.686	Likely Pathogenic	0.998	Likely Pathogenic	Likely Pathogenic	0.810	Likely Pathogenic	3.70	Destabilizing	0.2	2.46	Destabilizing	3.08	Destabilizing	2.29	Destabilizing	-4.88	Deleterious	0.920	Possibly Damaging	0.335	Benign	5.31	Benign	0.00	Affected	3.38	27	-2	-2	-7.7	29.98	249.1	-38.8	-0.1	0.1	1.0	0.0	X		X				X	Potentially Pathogenic	The iso-propyl side chain of Val400, located in an anti-parallel β sheet strand (res. Ala399-Ile411), hydrophobically packs against hydrophobic residues within the anti-parallel β sheet of the C2 domain (e.g., Ile268, Ala404, Leu325, Leu402). In the variant simulations, the negatively charged carboxylate group of the Glu400 side chain is not suitable for occupying the hydrophobic niche. Consequently, the side chain escapes the center of the C2 domain and interacts with the backbone amide groups of Leu402 in the same β strand and/or Ile269 and Glu270 in a neighboring β strand (res. Arg259-Arg272). This residue swap disrupts the hydrophobic packing and generally has extensive negative effects on the C2 domain structure. At a minimum, the residue swap could affect the C2 domain stability and membrane association.
c.1205T>G	L402R (3D Viewer)	Likely Pathogenic	C2	Likely Pathogenic		1				-13.800	Likely Pathogenic	0.997	Likely Pathogenic	Likely Pathogenic	0.522	Likely Pathogenic	4.10	Destabilizing	0.2	3.82	Destabilizing	3.96	Destabilizing	2.24	Destabilizing	-4.69	Deleterious	0.967	Probably Damaging	0.459	Possibly Damaging	3.69	Benign	0.00	Affected	3.38	28	-3	-2	-8.3	43.03	259.5	-55.4	0.0	0.0	1.4	0.0	X		X				X	Potentially Pathogenic	The iso-butyl side chain of Leu402, located in an anti-parallel β sheet strand (res. Ala399-Ile411), packs with residues inside the hydrophobic core of the C2 domain (e.g., Ile268, Ala404, Leu266, Val400). In the variant simulations, the positively charged guanidinium group of the Arg402 side chain is not suitable for the hydrophobic niche. Consequently, the side chain moves outward from the hydrophobic C2 domain core and stacks with the phenol ring of Tyr363 or forms H-bonds with the carboxamide group of the Gln361 side chain in the β sheet strand (res. Thr359-Tyr364). This movement induces extensive negative effects on the C2 domain structure.
c.1256A>G	E419G (3D Viewer)	Likely Pathogenic	GAP	Uncertain		1				-10.589	Likely Pathogenic	0.956	Likely Pathogenic	Likely Pathogenic	0.469	Likely Benign	1.41	Ambiguous	0.0	1.94	Ambiguous	1.68	Ambiguous	0.83	Ambiguous	-6.42	Deleterious	1.000	Probably Damaging	0.997	Probably Damaging	3.31	Benign	0.02	Affected	3.37	29	0	-2	3.1	-72.06	165.3	110.8	0.0	0.0	-0.1	0.0		X						Potentially Pathogenic	The carboxylate group of Glu419, located on an α helix (res. Met414-Glu436), forms a salt bridge with the side chain of either Arg716 or Lys418 from an opposing helix (res. Pro713-Arg726). The backbone amide group of Glu419 does not form H-bonds, resulting in a slight bend in the α helix. Thus, although glycine is known as an “α helix breaker,” the residue swap does not disrupt the continuity or integrity of the α helix. However, because Gly419 cannot form a salt bridge with the guanidinium group of the Arg716 side chain, the C2-GAP domain tertiary structure could be compromised during folding.
c.1259T>C	F420S (3D Viewer)	Likely Pathogenic	GAP	Likely Pathogenic		1				-13.231	Likely Pathogenic	1.000	Likely Pathogenic	Likely Pathogenic	0.544	Likely Pathogenic	5.34	Destabilizing	0.1	5.73	Destabilizing	5.54	Destabilizing	2.14	Destabilizing	-7.43	Deleterious	0.998	Probably Damaging	0.938	Probably Damaging	3.09	Benign	0.00	Affected	3.37	29	-3	-2	-3.6	-60.10	213.3	57.8	0.0	0.0	-0.4	0.1							X	Potentially Pathogenic	In the WT, the phenyl ring of the Phe420 side chain, located on an α helix (res. Met414-Glu436), packs against hydrophobic residues in the interhelix area of the GAP domain (e.g., Leu689, Leu714, Leu717, Leu718). Although no large-scale adverse effects are seen in the variant simulations, the polar hydroxyl group of Ser420 is not suitable for the hydrophobic inter-helix space. Thus, the residue swap could affect protein folding. In theory, the introduced hydroxyl group could also lower the α helix integrity by H-bonding with the backbone atoms of neighboring residues in the same α helix. However, no such effect is seen in the variant simulations.
c.155C>T	S52L			Uncertain		1	6-33423564-C-T	1	6.20e-7	-7.199	In-Between	0.688	Likely Pathogenic	Likely Benign	0.087	Likely Benign										-1.41	Neutral	0.829	Possibly Damaging	0.706	Possibly Damaging	4.10	Benign	0.00	Affected	4.32	1	-3	-2	4.6	26.08
c.1304T>G	L435W (3D Viewer)	Likely Pathogenic	GAP	Uncertain		1				-14.889	Likely Pathogenic	0.992	Likely Pathogenic	Likely Pathogenic	0.572	Likely Pathogenic	2.11	Destabilizing	0.1	0.69	Ambiguous	1.40	Ambiguous	1.66	Destabilizing	-5.63	Deleterious	1.000	Probably Damaging	0.998	Probably Damaging	3.15	Benign	0.00	Affected	3.37	29	-2	-2	-4.7	73.05	242.2	-25.2	0.0	0.0	0.3	0.1							X	Potentially Pathogenic	The iso-butyl side chain of Leu435, located in an α helix (res. Met414-Glu436), packs against other hydrophobic residues in an interhelix space (e.g., Val699, Val447, Leu489, Leu439) in the WT simulations. In the variant simulations, the indole ring of Trp435 fits into the same niche despite its considerably bulkier size. Additionally, the side chain forms an H-bond with the backbone carbonyl of Leu696 in an α helix (res. Asp684-Gln702). Although no apparent negative changes are observed during the variant simulation, the size difference between the swapped residues could affect the protein folding process.
c.1667A>T	N556I (3D Viewer)	Likely Pathogenic	GAP	Likely Benign		1	6-33438910-A-T			-13.391	Likely Pathogenic	0.929	Likely Pathogenic	Ambiguous	0.761	Likely Pathogenic	0.64	Ambiguous	0.0	0.17	Likely Benign	0.41	Likely Benign	0.26	Likely Benign	-7.52	Deleterious	1.000	Probably Damaging	0.999	Probably Damaging	-1.35	Pathogenic	0.02	Affected	3.37	35	-3	-2	8.0	-0.94
c.1406C>A	A469D (3D Viewer)	Likely Pathogenic	GAP	Uncertain		1				-14.643	Likely Pathogenic	0.999	Likely Pathogenic	Likely Pathogenic	0.738	Likely Pathogenic	5.09	Destabilizing	0.2	4.16	Destabilizing	4.63	Destabilizing	1.68	Destabilizing	-3.48	Deleterious	0.999	Probably Damaging	0.996	Probably Damaging	-1.34	Pathogenic	0.21	Tolerated	3.37	34	0	-2	-5.3	44.01	237.0	-58.2	-0.2	0.1	0.8	0.1	X		X					Potentially Pathogenic	The methyl group of Ala469, located in an α helix (res. Ala461–Phe476), interacts with hydrophobic residues (e.g., Trp572, Leu588, Met470) in an inter-helix space formed by two other α helices (res. Glu582–Ser604, res. Arg563–Gly580). In the variant simulations, Asp469 introduces a negatively charged and bulky side chain into the hydrophobic niche. Consequently, the side chain of Asp469 rotates outward, allowing the carboxylate group to form a salt bridge with the guanidinium group of Arg575 on the protein surface. This interaction affects the continuity of the parent α helix (Ala461–Phe476). Due to the importance of hydrophobic packing, the structural effects could be more pronounced during actual protein folding.
c.1784T>A	L595Q (3D Viewer)	Likely Pathogenic	GAP	Uncertain		1				-15.101	Likely Pathogenic	0.984	Likely Pathogenic	Likely Pathogenic	0.733	Likely Pathogenic	0.79	Ambiguous	0.1	1.40	Ambiguous	1.10	Ambiguous	1.99	Destabilizing	-5.97	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	2.75	Benign	0.00	Affected	3.37	35	-2	-2	-7.3	14.97
c.1487A>G	E496G (3D Viewer)	Likely Pathogenic	GAP	Uncertain		1				-13.529	Likely Pathogenic	0.850	Likely Pathogenic	Ambiguous	0.825	Likely Pathogenic	1.83	Ambiguous	0.1	1.76	Ambiguous	1.80	Ambiguous	0.92	Ambiguous	-6.16	Deleterious	1.000	Probably Damaging	0.999	Probably Damaging	-1.45	Pathogenic	0.02	Affected	3.37	35	0	-2	3.1	-72.06	173.9	103.1	0.0	0.0	-0.7	0.0		X		X				Potentially Pathogenic	Glu496 is located in the α-helix (res. Leu489-Glu519), and its carboxylate group forms salt bridges with the neighbouring residues Lys492 and Arg499 in the WT simulations. Glu496 also forms a hydrogen bond with Ser449 on an opposing helix (res. Val441-Ser457). In the variant simulations, Gly496 cannot form these salt bridges, which could weaken the secondary structure. Additionally, the loss of the hydrogen bond with Ser449 on the opposite helix can weaken the tertiary structure assembly. Moreover, glycine is an α-helix breaker, and it is seen to weaken the integrity of the helix as the hydrogen bonding between the backbone atoms of Gly496 and Ala493 breaks down. Also, due to its location at the GAP-Ras interface, the interaction of Glu496 with Arg499 and Lys492 might play a role in complex association and stability, which cannot be fully addressed using the SynGAP solvent-only simulations.
c.1490A>G	Y497C (3D Viewer)	Likely Pathogenic	GAP	Uncertain		1				-11.872	Likely Pathogenic	0.948	Likely Pathogenic	Ambiguous	0.806	Likely Pathogenic	3.88	Destabilizing	0.1	4.76	Destabilizing	4.32	Destabilizing	1.40	Destabilizing	-8.82	Deleterious	1.000	Probably Damaging	0.995	Probably Damaging	-1.65	Pathogenic	0.03	Affected	3.37	35	0	-2	3.8	-60.04	209.9	59.1	-0.1	0.0	-0.3	0.1		X					X	Potentially Pathogenic	Tyr497 is located in the α-helix (res. Leu489-Glu519) within the inter-helix space of four α-helices (res. Leu489-Ile501, res. Val441-Ser457, res. Arg563-Glu578, res. Ala461-Val473). In the WT simulations, the phenol ring of Tyr497 hydrophobically packs with other residues in the inter-helix space (e.g., Leu465, Leu565, Val568). The hydroxyl group of Tyr497 also alternately forms hydrogen bonds with the carboxylate side chain of Gln456 and the backbone carbonyl of Glu564. Thus, Tyr497 plays a role in the folding and maintenance of the tertiary structure assembly between these four helices.In the variant simulations, the comparatively smaller residue, Cys497, cannot maintain any of the interactions seen with Tyr497 in the WT. Although no severe deleterious consequences are observed in the simulations, the structural effects could be more pronounced during actual protein folding. Indeed, the tertiary structure is seen to slightly break apart in the variant simulations.
c.1529T>G	I510S (3D Viewer)	Likely Pathogenic	GAP	Likely Pathogenic		1				-11.661	Likely Pathogenic	0.955	Likely Pathogenic	Ambiguous	0.926	Likely Pathogenic	4.00	Destabilizing	0.1	3.78	Destabilizing	3.89	Destabilizing	2.34	Destabilizing	-4.63	Deleterious	1.000	Probably Damaging	0.999	Probably Damaging	-1.44	Pathogenic	0.00	Affected	3.37	35	-1	-2	-5.3	-26.08	201.4	45.9	-0.4	0.2	0.0	0.3							X	Potentially Pathogenic	Ile510 is located in the middle of an α-helix (res. Gly502-Tyr518) within the inter-helix space of three helices (res. Gly502-Tyr518, Ala533-Val560, and res. Glu582-Met603). In the WT simulations, the sec-butyl side chain of Ile510 hydrophobically packs with other residues in the inter-helix space (e.g., Leu506, Leu610, Ile514, Ile602, Leu598). In the variant simulations, the hydroxyl group of Ser510 forms a hydrogen bond with the backbone atoms of Leu506 and Gly511 in the same α-helix, which could further weaken the α-helix integrity. This α-helix already shows weakness in the WT simulations due to Gly511. Although the simulations do not show large-scale effects, the residue swap could have a substantial impact due to the fundamental role of hydrophobic packing during protein folding.
c.1531G>A	G511R (3D Viewer)	Likely Pathogenic	GAP	Likely Pathogenic		1				-11.327	Likely Pathogenic	0.991	Likely Pathogenic	Likely Pathogenic	0.416	Likely Benign	1.94	Ambiguous	0.3	1.32	Ambiguous	1.63	Ambiguous	0.94	Ambiguous	-7.72	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	3.26	Benign	0.06	Tolerated	3.37	35	-3	-2	-4.1	99.14	279.4	-159.9	0.0	0.0	0.7	0.1			X				X	Potentially Pathogenic	Gly511 is located in an α-helix (res. Gly502-Tyr518), facing hydrophobic residues in an inter-helix space (e.g., Leu610, Ile514) in the WT simulations. In contrast, in the variant simulations, the bulkier and positively charged guanidinium side chain of Arg511 forms a salt bridge with the carboxylate group of Glu217 or hydrogen bonds with the backbone carbonyl group of Leu610. Although the residue swap introduces a third positively charged residue in close vicinity (Arg511, Lys507, Arg515), the protein structure seems to remain stable in the variant simulations. Importantly, according to ClinVar, the residue swap alters the last nucleotide of an exon and is predicted to destroy the splice donor site, resulting in aberrant splicing and pathogenic status.	10.1016/j.ajhg.2020.11.011
c.1531G>C	G511R (3D Viewer)	Likely Pathogenic	GAP	Pathogenic		1				-11.327	Likely Pathogenic	0.991	Likely Pathogenic	Likely Pathogenic	0.415	Likely Benign	1.94	Ambiguous	0.3	1.32	Ambiguous	1.63	Ambiguous	0.94	Ambiguous	-7.72	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	3.26	Benign	0.06	Tolerated	3.37	35	-3	-2	-4.1	99.14	279.4	-159.9	0.0	0.0	0.7	0.1			X				X	Potentially Pathogenic	Gly511 is located in an α-helix (res. Gly502-Tyr518), facing hydrophobic residues in an inter-helix space (e.g., Leu610, Ile514) in the WT simulations. In contrast, in the variant simulations, the bulkier and positively charged guanidinium side chain of Arg511 forms a salt bridge with the carboxylate group of Glu217 or hydrogen bonds with the backbone carbonyl group of Leu610. Although the residue swap introduces a third positively charged residue in close vicinity (Arg511, Lys507, Arg515), the protein structure seems to remain stable in the variant simulations. Importantly, according to ClinVar, the residue swap alters the last nucleotide of an exon and is predicted to destroy the splice donor site, resulting in aberrant splicing and pathogenic status.	10.1016/j.ajhg.2020.11.011
c.1964T>A	L655Q (3D Viewer)	Likely Benign	GAP	Uncertain		1				-5.278	Likely Benign	0.144	Likely Benign	Likely Benign	0.139	Likely Benign	-0.01	Likely Benign	0.0	0.69	Ambiguous	0.34	Likely Benign	-0.15	Likely Benign	0.61	Neutral	0.955	Possibly Damaging	0.602	Possibly Damaging	3.59	Benign	0.65	Tolerated	3.39	24	-2	-2	-7.3	14.97	229.9	-8.6	0.0	0.0	0.4	0.0						X		Potentially Benign	The iso-butyl side chain of Leu655, located on the surface of an α helix (res. Ser641-Glu666), is not involved in any interactions in the WT simulations. In the variant simulations, the carboxamide side chain of Gln655 dynamically interacts with neighboring residues (e.g., Glu651, Glu656, Arg544) on the protein surface, with no negative structural effects.
c.1970G>T	W657L (3D Viewer)	Likely Pathogenic	GAP	Uncertain		1				-14.411	Likely Pathogenic	0.960	Likely Pathogenic	Likely Pathogenic	0.213	Likely Benign	0.14	Likely Benign	0.1	0.73	Ambiguous	0.44	Likely Benign	0.87	Ambiguous	-10.86	Deleterious	0.277	Benign	0.078	Benign	3.52	Benign	0.14	Tolerated	3.39	24	-2	-2	4.7	-73.05
c.1971G>C	W657C	Likely Pathogenic	GAP	Uncertain		1				-12.035	Likely Pathogenic	0.997	Likely Pathogenic	Likely Pathogenic	0.463	Likely Benign	2.74	Destabilizing	0.3	1.69	Ambiguous	2.22	Destabilizing	1.30	Destabilizing	-11.06	Deleterious	1.000	Probably Damaging	0.982	Probably Damaging	3.43	Benign	0.03	Affected			-8	-2	3.4	-83.07
c.1631G>C	R544P (3D Viewer)	Likely Pathogenic	GAP	Uncertain		2				-16.905	Likely Pathogenic	1.000	Likely Pathogenic	Likely Pathogenic	0.762	Likely Pathogenic	4.70	Destabilizing	0.1	4.19	Destabilizing	4.45	Destabilizing	1.14	Destabilizing	-4.88	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	-1.48	Pathogenic	0.05	Affected	3.37	35	0	-2	2.9	-59.07	192.0	123.8	0.1	0.0	-0.3	0.0	X	X						Potentially Pathogenic	Arg544 is located in the middle of an α-helix (res. Ala533-Val560). In the WT simulations, the guanidinium side chain of Arg544 forms a salt bridge with the carboxylate groups of Glu548 on the same α-helix, and with Glu651 and Glu656 on an opposing α-helix (res. Glu666-Asp644). In the variant simulations, the pyrrolidine side chain of Pro544 cannot form any of the salt bridges that Arg544 does in the WT, potentially weakening the tertiary structure assembly. Additionally, Pro544 lacks the amide group, and thus, unlike Arg544 in the WT, is unable to form a hydrogen bond with the carbonyl of Gln540. This disruption breaks the continuity of the secondary structure element, causing the α-helix to bend slightly in the variant simulations. These negative structural effects could be more pronounced during protein folding and are likely to be undermined in the MD simulations.
c.1976C>T	S659F (3D Viewer)	Likely Pathogenic	GAP	Uncertain		1				-10.925	Likely Pathogenic	0.662	Likely Pathogenic	Likely Benign	0.194	Likely Benign	-0.81	Ambiguous	0.1	-0.25	Likely Benign	-0.53	Ambiguous	0.32	Likely Benign	-4.59	Deleterious	0.806	Possibly Damaging	0.171	Benign	3.39	Benign	0.05	Affected	3.38	28	-3	-2	3.6	60.10	221.3	-61.2	0.0	0.0	0.6	0.4						X		Potentially Benign	In the WT simulations, the hydroxyl group of Ser659, located in a kink in the middle of the long α-helix (res. Ser641-Glu666), forms a hydrogen bond with the carboxylate group of Glu656. However, the phenol ring of the Phe659 side chain cannot form a similar hydrogen bond. Instead, it interacts with the hydrophobic isopropyl side chain of Val555 from the opposing α-helix (res. Ala533-Val560). This residue swap may therefore cause issues during protein folding.
c.1640G>A	C547Y (3D Viewer)	Likely Pathogenic	GAP	Pathogenic		1				-15.871	Likely Pathogenic	0.999	Likely Pathogenic	Likely Pathogenic	0.874	Likely Pathogenic	8.53	Destabilizing	1.8	6.20	Destabilizing	7.37	Destabilizing	0.62	Ambiguous	-10.57	Deleterious	1.000	Probably Damaging	0.998	Probably Damaging	-1.33	Pathogenic	0.06	Tolerated	3.37	35	0	-2	-3.8	60.04	280.1	-54.8	0.0	0.0	0.0	0.0		X	X				X	Potentially Pathogenic	Cys547 is located in an α-helix (res. Ala533-Val560). The thiol side chain of Cys547 is situated in a hydrophobic inter-helix space, where it packs hydrophobically with other residues such as Ile626, Leu551, and Phe652. Additionally, the thiol side chain of Cys weakly hydrogen bonds with the carbonyl group of Leu543 in the same α-helix. In the variant simulations, the bulkier phenol ring of Tyr547, with its polar hydroxyl group, is less suited for the hydrophobic space. Consequently, it moves outside and forms a hydrogen bond with the carbonyl group of Phe652 in the neighboring α-helix (res. Glu666-Asp644). This causes the two helices to slightly separate, negatively affecting the secondary structure integrity of the latter helix. These negative structural effects could be more pronounced during protein folding and are likely to be undermined in the MD simulations.
c.2075T>A	L692Q (3D Viewer)	Likely Pathogenic	GAP	Pathogenic		1				-13.873	Likely Pathogenic	0.998	Likely Pathogenic	Likely Pathogenic	0.596	Likely Pathogenic	3.24	Destabilizing	0.1	3.27	Destabilizing	3.26	Destabilizing	2.76	Destabilizing	-5.98	Deleterious	1.000	Probably Damaging	0.998	Probably Damaging	3.06	Benign	0.00	Affected	3.42	17	-2	-2	-7.3	14.97
c.1706T>C	F569S (3D Viewer)	Likely Pathogenic	GAP	Likely Pathogenic		2				-13.384	Likely Pathogenic	0.999	Likely Pathogenic	Likely Pathogenic	0.916	Likely Pathogenic	5.70	Destabilizing	0.1	5.38	Destabilizing	5.54	Destabilizing	2.45	Destabilizing	-7.97	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	-1.32	Pathogenic	0.00	Affected	3.37	34	-3	-2	-3.6	-60.10	213.7	67.9	-0.1	0.0	-1.0	0.1							X	Potentially Pathogenic	Phe569 is located on an α-helix (res. Arg563-Glu578). In the WT simulations, the phenyl side chain of Phe569 packs with hydrophobic residues such as Trp572, Leu565, Ile589, Ile667, and Phe561, originating from three different α-helices (res. Ala533-Val560, res. Arg563-Glu578, and res. Ser641-Glu666). In the variant simulations, the acceptor/donor hydroxyl group of Ser569 forms hydrogen bonds with the carbonyl groups of Glu567 and Lys566 on the same α-helix, which could affect the α-helix integrity, although this is not observed in the simulations. While the simulations do not show large-scale effects, the residue swap could have a substantial impact on the protein structure due to the fundamental role of hydrophobic packing during protein folding.
c.1714T>G	W572G (3D Viewer)	Likely Pathogenic	GAP	Uncertain		1				-17.692	Likely Pathogenic	0.997	Likely Pathogenic	Likely Pathogenic	0.900	Likely Pathogenic	6.57	Destabilizing	0.2	7.57	Destabilizing	7.07	Destabilizing	1.83	Destabilizing	-11.98	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	-1.24	Pathogenic	0.00	Affected	3.37	35	-7	-2	0.5	-129.16	195.2	127.9	0.0	0.0	-1.0	0.0							X	Potentially Pathogenic	The introduced residue Gly572, located in an α-helix (res. Arg563-Glu578), is considerably smaller than the tryptophan it replaced. The indole ring of the Trp572 side chain lies in a hydrophobic inter-helix space, where it makes extensive hydrophobic interactions with nearby residues such as Met470, Phe569, Leu588, and Ile589. In the variant simulations, all these favorable packing interactions are completely removed, as the introduced residue Gly572 essentially lacks a side chain altogether. Although not observed in the simulations, the residue swap could also weaken the integrity of the helix (res. Arg563-Glu578), as glycine is known as an “α-helix breaker.” Overall, the residue swap is highly likely to cause critical protein folding problems that are underestimated based on the effects seen in the variant simulations.
c.1718G>T	R573L (3D Viewer)	Likely Pathogenic	GAP	Likely Pathogenic		1				-13.120	Likely Pathogenic	0.993	Likely Pathogenic	Likely Pathogenic	0.833	Likely Pathogenic	1.30	Ambiguous	0.6	1.11	Ambiguous	1.21	Ambiguous	0.80	Ambiguous	-5.74	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	-1.41	Pathogenic	0.01	Affected	3.37	35	-3	-2	8.3	-43.03	237.4	60.7	0.0	0.0	-0.7	0.3	X	X						Potentially Pathogenic	The guanidinium group of Arg573, located in an α-helix (res. Arg563-Glu578), forms a salt bridge with the carboxylate groups of Glu582 and/or Asp586 from a nearby α-helix (res. Glu582-Met603) in the WT simulations. Additionally, the Arg573 side chain stacks planarly with the aromatic phenol ring of Tyr665 and hydrogen bonds with the hydroxyl group of Ser668 from another α-helix (res. Ser641-Ser668). In the variant simulations, the aliphatic iso-butyl group of the Leu573 side chain fails to establish any of these interactions, which, in turn, lowers the integrity of the opposing α-helix end (res. Glu582-Met603). Overall, the residue swap has the potential to substantially affect the tertiary structure assembly during the protein folding process.	10.1016/j.ajhg.2020.11.011
c.2216A>T	E739V	Likely Benign		Uncertain		1				-3.136	Likely Benign	0.274	Likely Benign	Likely Benign	0.085	Likely Benign										-1.86	Neutral	0.891	Possibly Damaging	0.575	Possibly Damaging	2.47	Pathogenic	0.00	Affected	4.32	2	-2	-2	7.7	-29.98
c.2243T>G	L748R	Likely Benign		Conflicting		2	6-33441708-T-G	3	1.86e-6	-3.331	Likely Benign	0.245	Likely Benign	Likely Benign	0.055	Likely Benign										-0.67	Neutral	0.912	Possibly Damaging	0.448	Possibly Damaging	2.73	Benign	0.02	Affected	4.32	2	-3	-2	-8.3	43.03
c.2249G>A	G750E			Uncertain		1				-2.618	Likely Benign	0.413	Ambiguous	Likely Benign	0.146	Likely Benign										-2.27	Neutral	1.000	Probably Damaging	0.982	Probably Damaging	2.49	Pathogenic	0.01	Affected	3.99	5	0	-2	-3.1	72.06
c.2255C>T	S752L	Likely Benign		Uncertain		2	6-33441720-C-T	6	3.72e-6	-3.386	Likely Benign	0.182	Likely Benign	Likely Benign	0.195	Likely Benign										-2.09	Neutral	0.993	Probably Damaging	0.641	Possibly Damaging	1.51	Pathogenic	0.01	Affected	3.99	5	-3	-2	4.6	26.08
c.2282G>C	R761P	Likely Benign		Uncertain		3	6-33441747-G-C	1	6.20e-7	-5.091	Likely Benign	0.640	Likely Pathogenic	Likely Benign	0.201	Likely Benign										-1.89	Neutral	0.999	Probably Damaging	0.968	Probably Damaging	2.69	Benign	0.38	Tolerated	3.99	5	0	-2	2.9	-59.07
c.1787G>T	R596L (3D Viewer)	Likely Pathogenic	GAP	Uncertain		1				-13.197	Likely Pathogenic	0.992	Likely Pathogenic	Likely Pathogenic	0.756	Likely Pathogenic	1.51	Ambiguous	0.3	-0.58	Ambiguous	0.47	Likely Benign	-0.02	Likely Benign	-6.97	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	2.45	Pathogenic	0.00	Affected	3.37	35	-3	-2	8.3	-43.03	234.2	63.4	-0.1	0.0	-0.5	0.6		X		X				Potentially Pathogenic	The guanidinium group of Arg596, located in an α helix (res. Glu582-Met603), forms a salt bridge with the carboxylate group of Glu495 from another α helix (res. Leu489-Glu519). In the WT simulations, the side chain of Arg596 hydrogen bonds with the backbone carbonyl groups of Asn487, Glu486, Arg485, and Phe484. Additionally, Arg596 can hydrogen bond with the carboxamide group of the Asn487 side chain on an opposing loop that links two α helices (res. Ala461-Arg475, res. Leu489-Glu519).However, in the variant simulations, the branched hydrocarbon side chain of Leu596 cannot form any of the hydrogen bonds or salt bridges maintained by the considerably bulkier and positively charged Arg596 side chain. Instead, Leu596 packs hydrophobically with the phenyl ring of Phe484 in the linker loop or residues from the opposing helix (e.g., Ile494, Thr491).Thus, the residue swap could affect the tertiary structure assembly more profoundly than observed in the simulations. Notably, Arg596 plays a key role in positioning the aforementioned loop, which is crucial for the placement of the “arginine finger” or the Arg485 side chain during RasGTPase activation.	10.1016/j.ajhg.2020.11.011
c.233G>T	R78L	Likely Benign		Uncertain		1				-3.389	Likely Benign	0.635	Likely Pathogenic	Likely Benign	0.062	Likely Benign										-1.59	Neutral	0.385	Benign	0.021	Benign	3.84	Benign	0.00	Affected			-3	-2	8.3	-43.03
c.1811C>T	S604L (3D Viewer)	Likely Pathogenic	GAP	Uncertain		1	6-33440863-C-T	6	3.72e-6	-14.683	Likely Pathogenic	0.965	Likely Pathogenic	Likely Pathogenic	0.639	Likely Pathogenic	-0.94	Ambiguous	0.1	-1.24	Ambiguous	-1.09	Ambiguous	-0.31	Likely Benign	-5.97	Deleterious	1.000	Probably Damaging	0.991	Probably Damaging	3.09	Benign	0.00	Affected	3.37	35	-3	-2	4.6	26.08	234.0	-49.6	0.0	0.1	0.3	0.5	X			X				Potentially Pathogenic	Ser604 is located in a short turn between an α helix (res. Glu582-Met603) and a short α helical section (res. Ser606-Phe608). In the WT simulations, the hydroxyl side chain of Ser604 periodically hydrogen bonds with the backbone carbonyl groups of other α helix residues (e.g., Pro600, Met603). Serine weakens the α helix secondary structure, and thus, Ser604 along with Pro605 breaks the α helix, facilitating the turn in the WT structure.In contrast, in the variant simulations, Leu604 forms a few hydrophobic interactions (e.g., Leu607, Phe608). More importantly, the helix end is more stable than with Ser604 in the WT. The residue swap could have a more profound effect on the actual folding process, for example, by preventing the bending at the α helix end, than what the simulations suggest.Moreover, Ser604 directly hydrogen bonds with Ras residues Ser65 and Ala66 in the WT SynGAP-Ras complex. The hydrophobic leucine cannot maintain these interactions with Ras at the GAP-Ras interface. Thus, the effect of the residue swap on the complex formation with the GTPase cannot be fully explored in the solvent-only simulations.
c.1814C>G	P605R (3D Viewer)	Likely Pathogenic	GAP	Uncertain		1				-13.745	Likely Pathogenic	0.996	Likely Pathogenic	Likely Pathogenic	0.845	Likely Pathogenic	8.71	Destabilizing	2.5	6.46	Destabilizing	7.59	Destabilizing	0.92	Ambiguous	-8.95	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	0.69	Pathogenic	0.00	Affected	3.37	35	0	-2	-2.9	59.07	281.7	-118.1	-0.2	0.0	0.5	0.1		X	X	X			X	Potentially Pathogenic	Pro605 is located in a short turn between an α helix (res. Glu582-Met603) and a short α helical section (res. Ser606-Phe608). The pyrrolidine side chain of Pro605 packs hydrophobically with nearby hydrophobic residues (e.g., Ile514, Leu623, Leu610) in the inter-helix space. Additionally, proline lacks a free backbone amide group, which breaks the α helix and facilitates the turn in the WT structure.In the variant simulations, the guanidinium side chain of Arg605 is bulkier than proline, and its positively charged guanidinium group faces mostly hydrophobic residues (e.g., Ile514, Leu623, Leu610). As a result, it needs to rotate away from the hydrophobic niche. The residue swap could have a more profound effect on the actual folding process, for example, by preventing the bending at the α helix end.Moreover, due to its location at the GAP-Ras interface, the residue swap could affect the GAP-Ras association.
c.2420A>G	Y807C		SH3-binding motif	Uncertain		1	6-33442972-A-G	1	6.20e-7	-7.228	In-Between	0.204	Likely Benign	Likely Benign	0.243	Likely Benign										-3.89	Deleterious	0.997	Probably Damaging	0.934	Probably Damaging	2.42	Pathogenic	0.01	Affected	3.77	5	0	-2	3.8	-60.04
c.2435C>A	P812H		SH3-binding motif	Uncertain		2	6-33442987-C-A	3	1.86e-6	-7.470	In-Between	0.698	Likely Pathogenic	Likely Benign	0.272	Likely Benign										-2.81	Deleterious	1.000	Probably Damaging	0.995	Probably Damaging	2.68	Benign	0.00	Affected	4.32	4	0	-2	-1.6	40.02
c.1991T>C	L664S (3D Viewer)	Likely Pathogenic	GAP	Likely Benign		1	6-33441250-T-C	1	6.20e-7	-16.498	Likely Pathogenic	0.997	Likely Pathogenic	Likely Pathogenic	0.543	Likely Pathogenic	3.75	Destabilizing	0.2	3.63	Destabilizing	3.69	Destabilizing	2.77	Destabilizing	-5.99	Deleterious	1.000	Probably Damaging	0.996	Probably Damaging	2.85	Benign	0.00	Affected	3.38	28	-3	-2	-4.6	-26.08	215.5	50.1	0.0	0.0	-0.2	0.2						X		Potentially Benign	The iso-butyl side chain of L664, located on an α-helix (res. Ser641-Glu666), hydrophobically interacts with residues in the inter-helix space between three helices (res. Glu617-Asn635, res. Glu582-Met603, and res. Ser641-Glu666), such as Ile589, Phe663, and Met660. In the variant simulations, the hydroxyl group of Ser664 forms hydrogen bonds with the backbone carbonyl oxygen of another helix residue, such as Met660 or Gln661. This interaction is known to destabilize hydrogen bonding in the α-helix, but this effect was not observed in the simulations. Additionally, Ser664 occasionally forms hydrogen bonds with the carboxylate group of Asp586 on another α-helix (res. Glu582-Met603), which could minimally influence the tertiary structure assembly. Despite these interactions, no major negative effects on the protein structure were observed during the simulations.
c.1997A>G	E666G (3D Viewer)	Likely Pathogenic	GAP	Likely Benign		1	6-33441256-A-G	10	6.20e-6	-12.261	Likely Pathogenic	0.911	Likely Pathogenic	Ambiguous	0.522	Likely Pathogenic	1.57	Ambiguous	0.1	1.46	Ambiguous	1.52	Ambiguous	0.93	Ambiguous	-6.25	Deleterious	1.000	Probably Damaging	0.970	Probably Damaging	3.37	Benign	0.02	Affected	3.38	28	0	-2	3.1	-72.06	173.9	98.5	0.0	0.0	-0.7	0.0		X						Potentially Pathogenic	In the WT simulations, the carboxylate group of Glu666, located on the α-helix (res. Ser641-Glu666), is involved in a highly coordinated hydrogen-bonding network between residues from two α-helices (res. Ser641-Glu666 and res. Arg563-Glu578) and from the α-α loop connecting the two α-helices (res. Ser641-Glu666 and res. Leu685-Val699), such as Lys566, Thr672, and Asn669. In the variant simulations, the carbonyl group of Gly666 occasionally forms hydrogen bonds with Lys566 and Asn669. However, Gly666 lacks a side chain and thus cannot maintain as well-coordinated a hydrogen-bond network as Glu666 in the WT, which may affect the tertiary structure assembly.
c.2443C>G	R815G		SH3-binding motif	Uncertain		1				-7.983	In-Between	0.854	Likely Pathogenic	Ambiguous	0.146	Likely Benign										-3.22	Deleterious	0.999	Probably Damaging	0.997	Probably Damaging	2.62	Benign	0.02	Affected	4.32	4	-3	-2	4.1	-99.14
c.2458T>A	Y820N			Uncertain		1				-9.032	Likely Pathogenic	0.842	Likely Pathogenic	Ambiguous	0.143	Likely Benign										-1.53	Neutral	0.999	Probably Damaging	0.977	Probably Damaging	2.74	Benign	0.20	Tolerated			-2	-2	-2.2	-49.07
c.2459A>G	Y820C	Likely Pathogenic		Uncertain		1				-8.797	Likely Pathogenic	0.744	Likely Pathogenic	Likely Benign	0.113	Likely Benign										-3.16	Deleterious	1.000	Probably Damaging	0.983	Probably Damaging	2.68	Benign	0.06	Tolerated	3.77	5	0	-2	3.8	-60.04
c.2003C>T	S668F (3D Viewer)	Likely Pathogenic	GAP	Likely Pathogenic		1				-15.047	Likely Pathogenic	0.999	Likely Pathogenic	Likely Pathogenic	0.643	Likely Pathogenic	16.72	Destabilizing	5.0	11.07	Destabilizing	13.90	Destabilizing	0.00	Likely Benign	-5.98	Deleterious	0.999	Probably Damaging	0.935	Probably Damaging	3.18	Benign	0.00	Affected	3.38	28	-3	-2	3.6	60.10	250.9	-59.6	-0.1	0.1	0.0	0.1		X	X				X	Potentially Pathogenic	In the WT simulations, the hydroxyl side chain of Ser668, located on an α-α loop connecting the two α-helices (res. Ser641-Glu666 and res. Leu685-Val699), forms hydrogen bonds with the backbone carbonyl groups of Leu664, Tyr665, and Glu666, as well as the guanidinium group of Arg573 on a nearby α-helix (res. Arg563-Glu578). In the variant simulations, the side chain of Phe668 cannot maintain the same hydrogen-bond network. Due to its larger size, it moves away to avoid steric hindrance. In the WT simulations, a network of hydrogen bonds between several residues (e.g., Asn669, Lys566, and Glu666) keeps both α-helices and the proceeding loop (res. Asn669-Asp684) tightly connected, but this setup is not present in the variant simulations. Additionally, in the variant simulations, the side chain of Arg573 shifts to form a more stable salt bridge with the carboxylate group of Glu582 instead of hydrogen bonding with Ser668 as in the WT simulations.
c.250C>G	R84G			Uncertain		1				-6.627	Likely Benign	0.989	Likely Pathogenic	Likely Pathogenic	0.139	Likely Benign										-2.64	Deleterious	0.962	Probably Damaging	0.726	Possibly Damaging	3.68	Benign	0.00	Affected	4.32	1	-3	-2	4.1	-99.14
c.2525C>A	S842Y	Likely Pathogenic		Likely Pathogenic		1				-16.124	Likely Pathogenic	0.995	Likely Pathogenic	Likely Pathogenic	0.191	Likely Benign										-4.28	Deleterious	0.944	Possibly Damaging	0.676	Possibly Damaging	1.97	Pathogenic	0.00	Affected	3.77	5	-3	-2	-0.5	76.10
c.2548G>A	G850R	Likely Benign		Uncertain		1				-5.082	Likely Benign	0.398	Ambiguous	Likely Benign	0.194	Likely Benign										-0.07	Neutral	0.010	Benign	0.010	Benign	4.30	Benign	0.01	Affected	3.77	5	-3	-2	-4.1	99.14
c.2557G>C	G853R	Likely Benign		Uncertain		1				-4.749	Likely Benign	0.366	Ambiguous	Likely Benign	0.091	Likely Benign										-1.27	Neutral	0.846	Possibly Damaging	0.624	Possibly Damaging	4.18	Benign	0.00	Affected			-3	-2	-4.1	99.14
c.2582C>T	S861L	Likely Benign		Uncertain		1	6-33443134-C-T	2	1.24e-6	-4.966	Likely Benign	0.219	Likely Benign	Likely Benign	0.144	Likely Benign										-2.10	Neutral	0.904	Possibly Damaging	0.355	Benign	3.93	Benign	0.07	Tolerated	4.32	3	-3	-2	4.6	26.08
c.2162T>G	I721S (3D Viewer)	Likely Pathogenic	GAP	Uncertain		1				-14.032	Likely Pathogenic	0.996	Likely Pathogenic	Likely Pathogenic	0.466	Likely Benign	3.91	Destabilizing	0.1	3.96	Destabilizing	3.94	Destabilizing	2.28	Destabilizing	-5.26	Deleterious	1.000	Probably Damaging	1.000	Probably Damaging	2.21	Pathogenic	0.00	Affected	3.50	9	-1	-2	-5.3	-26.08	203.3	49.3	-0.1	0.0	-1.1	0.0							X	Uncertain	The sec-butyl side chain of Ile721, located on an α-helix (res. Leu714-Arg726), engages in hydrophobic packing with other residues in the hydrophobic inter-helix space, such as Phe420, Tyr417, His693, and Leu717. In the variant simulations, the hydroxyl side chain of Ser721 forms hydrogen bonds with nearby residues, such as Leu717 and His693. Although no major structural changes are observed during the variant simulations, the hydrophilic residue Ser721 could disrupt the hydrophobic packing during folding. However, because the model ends abruptly at the C-terminus, no definite conclusions can be drawn based on the simulations.
c.2669G>C	R890P	Likely Benign		Likely Benign		2	6-33443221-G-C	28	1.74e-5	-1.931	Likely Benign	0.301	Likely Benign	Likely Benign	0.191	Likely Benign										-1.21	Neutral	0.999	Probably Damaging	0.977	Probably Damaging	4.02	Benign	0.28	Tolerated	4.32	4	0	-2	2.9	-59.07
c.2681G>A	G894E	Likely Benign		Uncertain		1	6-33443233-G-A	6	3.72e-6	-5.377	Likely Benign	0.859	Likely Pathogenic	Ambiguous	0.180	Likely Benign										-2.07	Neutral	1.000	Probably Damaging	1.000	Probably Damaging	2.68	Benign	0.01	Affected	4.32	4	0	-2	-3.1	72.06
c.2690C>T	S897L	Likely Benign		Uncertain		1				-4.034	Likely Benign	0.299	Likely Benign	Likely Benign	0.028	Likely Benign										-1.71	Neutral	0.901	Possibly Damaging	0.636	Possibly Damaging	2.66	Benign	0.01	Affected			-3	-2	4.6	26.08
c.269T>A	V90E	Likely Benign		Uncertain		1				-4.079	Likely Benign	0.703	Likely Pathogenic	Likely Benign	0.108	Likely Benign										-0.38	Neutral	0.001	Benign	0.000	Benign	4.00	Benign	0.00	Affected	4.32	1	-2	-2	-7.7	29.98
c.272A>G	E91G	Likely Benign		Likely Benign		1				-3.226	Likely Benign	0.783	Likely Pathogenic	Likely Benign	0.110	Likely Benign										-2.18	Neutral	0.947	Possibly Damaging	0.727	Possibly Damaging	3.86	Benign	0.00	Affected	4.32	1	0	-2	3.1	-72.06
c.2741A>T	D914V	Likely Benign		Uncertain		1				-4.260	Likely Benign	0.723	Likely Pathogenic	Likely Benign	0.187	Likely Benign										-2.24	Neutral	0.999	Probably Damaging	0.986	Probably Damaging	2.64	Benign	0.01	Affected	3.77	5	-3	-2	7.7	-15.96