SCN5A Variant F530S Detail

We estimate the penetrance of LQTS for SCN5A F530S around 10% and the Brugada syndrome penetrance around 13%. SCN5A F530S was found in a total of 1 carriers in 0 papers and/or in gnomAD: 0 had Brugada syndrome, 0 had LQTS. F530S is present in 1 alleles in gnomAD. F530S has been functionally characterized in 0 papers. This residue is located in a Non_Hotspot region for Brugada syndrome and a Non_Hotspot region for LQTS. In silico predictions, functional data (if available), and location in structure are equivalent to phenotyping 10 individuals for Brugada syndrome (1 diagnosed with Brugada syndrome) and 5 individuals for LQTS (0 with LQTS). These data combined with observations of carriers lead us to estimate the LQTS penetrance for SCN5A F530S around 10% (0/11) and the Brugada syndrome penetrance around 13% (1/11).

In Silico Data

PROVEAN PolyPhen-2 BLAST-PSSM REVEL Penetrance Density BrS (%) Penetrance Density LQT3 (%)
-7.07 0.906 -0.99 0.793 3 6
PROVEAN scores less than -2 are considered deleterious. REVEL scores higher than 0.5 or 0.75 are considered likely pathogenic (higher sensitivity with the former cutoff, higher specificity with the latter cutoff). A PolyPhen-2 score of 0.85 or greater is considered likely pathogenic. BLAST-PSSM reflects the evolutionary conservation of residue substitutions, more negative numbers indicate fewer observations of the specific substitution than is expected. Penetrance Density is our previously published method to calculate the average BrS/LQTS probability density in a shell of residues surrounding a residue of interest (Kroncke et al. 2019).

Reported Carrier Data

PubMed ID Year Carriers Unaffected LQT3 BrS1 Other Other Disease
LITERATURE, COHORT, AND GNOMAD: - 1 1 0 0 -
VARIANT FEATURES ALONE: - 15 14 0 1 - -
Summary totals might not agree with the literature table because of duplicate patients, which were excluded from the total counts. We do not distinguish here between multiple missense codons. Missense variants are combined across degenerate codon substitutions since codon-level data were not consistently available for curation.

F530S has 31 previously observed neighbors within 15 angstroms

A residue within a folded protein on average has nearest neighbors that fall roughly into two shells: a "nearest" neighbor around 5-6 angstroms and a second shell around 11 angstroms. All variants shown in the rightmost column have been observed in at least one individual in the literature or gnomAD.

Neighbor Distance (Angstroms) Variants Observed in Individuals
515 15
516 14
517 14 R517S,
518 13
519 13 S519F,
520 12 M520V, M520R,
521 11 K521E, c.1562delA,
522 11 P522S,
523 10 R523H, R523S, R523C,
524 9 c.1570_1571insG, S524Y,
525 8 S525G,
526 8 R526C, R526H,
527 7 G527R,
528 5 S528R,
529 4
530 0 F530S, F530V,
531 4 T531A, T531I,
532 5 F532L, F532C,
533 7 R533C, R533S, R533H,
534 8
535 8 R535X, R535G, R535Q,
536 9 D536H,
537 10
538 11 G538D,
539 11
540 12
541 13
542 13
543 14 F543L,
544 14
545 15