SCN5A Variant G1631D
Summary of observed carriers, functional annotations, and structural context for SCN5A G1631D. Data combine curated literature, international cohorts, and gnomAD observations.
Estimated LQT3 penetrance
51%
3/12 effective observations
Estimated BrS1 penetrance
19%
2/12 effective observations
Total carriers
2
0 BrS1 · 2 LQT3 · 0 unaffected
Variant features alone are equivalent to phenotyping 2 individuals for Brugada syndrome and 1 individuals for LQT3.
In silico predictors
| PROVEAN | PolyPhen-2 | BLAST-PSSM | REVEL | Penetrance Density BrS (%) | Penetrance Density LQT3 (%) |
|---|---|---|---|---|---|
| -6.47 | 0.954 | -4.02 | 0.982 | 29 | 40 |
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
| Source | Year | Carriers | Unaffected | LQT3 | BrS1 | Other | Other Disease |
|---|---|---|---|---|---|---|---|
| 19808432 | 2008 | 2 | 2 | 0 | 0 | ||
| 27566755 | 2016 | 2 | 2 | 0 | 0 | ||
| 30059973 | 2018 | 1 | 1 | 0 | 0 | ||
| Literature, cohort, and gnomAD | – | 2 | 0 | 2 | 0 | – | |
| Variant features alone | – | 15 | 12 | 1 | 2 | – | – |
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.
Nearby variants
Neighbouring residues within 15 Ångström provide structural context. Variants listed in the right-most column have been observed clinically or in gnomAD.
| Neighbour residue | Distance (Å) | Observed variants |
|---|---|---|
| 266 | 14 | L266H, |
| 1643 | 14 | I1643L, |
| 1627 | 9 | |
| 1624 | 13 | V1624I, |
| 1536 | 14 | |
| 1538 | 9 | |
| 1531 | 13 | |
| 1635 | 7 | |
| 1634 | 5 | L1634P, |
| 1534 | 13 | |
| 1542 | 11 | |
| 1650 | 14 | L1650F |
| 260 | 10 | |
| 1571 | 15 | F1571C, |
| 258 | 14 | V258A, |
| 1654 | 15 | |
| 1630 | 4 | I1630V, I1630R, |
| 1532 | 14 | V1532I, V1532F, |
| 1626 | 13 | R1626C, R1626H, R1626P, R1626L, |
| 267 | 14 | |
| 1644 | 13 | R1644C, R1644H, R1644L, |
| 1625 | 12 | |
| 262 | 12 | S262G, |
| 256 | 11 | |
| 399 | 13 | |
| 261 | 14 | |
| 1628 | 6 | |
| 1589 | 12 | |
| 1632 | 5 | R1632C, R1632H, R1632L, |
| 1597 | 15 | V1597M, |
| 1539 | 10 | C1539Y, C1539F, |
| 255 | 14 | |
| 395 | 14 | |
| 1535 | 9 | |
| 1537 | 14 | |
| 1594 | 10 | F1594S, |
| 264 | 12 | |
| 1638 | 14 | R1638X, R1638Q, |
| 1651 | 12 | |
| 259 | 8 | |
| 1633 | 5 | |
| 1591 | 6 | W1591X, |
| 1593 | 13 | I1593M, |
| 1595 | 10 | |
| 1637 | 10 | |
| 1636 | 9 | |
| 263 | 9 | V263I, |
| 1629 | 8 | R1629G, R1629X, R1629Q, |
| 1574 | 15 | c.4719C>T, E1574K, |
| 1541 | 13 | |
| 1592 | 11 | |
| 1540 | 15 | |
| 1631 | 0 | G1631D, |
| 1590 | 10 | |
| 1647 | 11 | |
| 257 | 14 | |
| 400 | 15 | G400R, G400R, G400E, G400A, |
| 1598 | 14 | V1598A, |