SCN5A Variant G35S

Summary of observed carriers, functional annotations, and structural context for SCN5A G35S. Data combine curated literature, international cohorts, and gnomAD observations.

Estimated LQT3 penetrance

4%

1/38 effective observations

Estimated BrS1 penetrance

4%

1/38 effective observations

Total carriers

28

1 BrS1 · 1 LQT3 · 26 unaffected

G35S is present in 26 alleles in gnomAD. This residue resides in a Non_Hotspot region for Brugada syndrome and a Non_Hotspot region for LQT3.

Variant features alone are equivalent to phenotyping 0 individuals for Brugada syndrome and 0 individuals for LQT3.

In silico predictors

Variant-level computational predictors.
PROVEAN PolyPhen-2 BLAST-PSSM REVEL Penetrance Density BrS (%) Penetrance Density LQT3 (%)
0.89 0.001 0.49 0.212 2 4

PROVEAN scores below -2 suggest deleterious impact. REVEL scores above 0.5–0.75 are often interpreted as likely pathogenic. PolyPhen-2 scores above 0.85 are typically pathogenic. Penetrance density summarises neighbouring residue risk (Kroncke et al. 2019).

Reported carrier data

Observed carriers by publication or cohort.
Source Year Carriers Unaffected LQT3 BrS1 Other Other Disease
11960580 2001 1 0 1 0
18752142 2008 1 1 0 0
29325976 2018 1 0 1 0
Literature, cohort, and gnomAD – 28 26 1 1 –
Variant features alone – 15 15 0 0 – –

Totals may differ from individual publications due to duplicate patients removed during curation.

Functional data

Peak and late/persistent current values are relative to wild-type (100% indicates no change). V1/2 activation and inactivation denote the membrane potentials (mV) at which half-maximal current is achieved.

Published electrophysiology measurements.
PubMed ID Year Cell Type Peak Current (% WT) V1/2 Activation (mV) V1/2 Inactivation (mV) Late/Persistent Current (% WT)
23805106 2013 HEK 116 -1.7 -1.8
11960580 2001
18752142 2008
29325976 2018

Nearby variants

Neighbouring residues within 15 Ångström provide structural context. Variants listed in the right-most column have been observed clinically or in gnomAD.

Previously observed variants near G35S.
Neighbour residue Distance (Å) Observed variants
20 15 S20F,
21 14 L21V,
22 14 A22V,
23 13 A23S,
24 13
25 12 E25K,
26 11
27 11 R27C, R27H, R27L,
28 10 M28L, M28L, M28T, M28I, M28I, M28I,
29 9 A29E, A29V,
30 8 E30G,
31 8
32 7
33 5
34 4 R34C, R34H,
35 0 G35S,
36 4
37 5 T37A,
38 7
39 8 L39F, L39F,
40 8
41 9
42 10
43 11 R43X, R43Q,
44 11
45 12 G45A,
46 13
47 13
48 14 E48K,
49 14 E49K
50 15