SCN5A Variant S1073P Detail

We estimate the penetrance of LQTS for SCN5A S1073P around 37% and the Brugada syndrome penetrance around 9%. SCN5A S1073P was found in a total of 0 carriers in 0 papers and/or in gnomAD: 0 had Brugada syndrome, 0 had LQTS. S1073P is not present in gnomAD. S1073P has been functionally characterized in 0 papers. This residue is located in a Non_Hotspot region for Brugada syndrome and a Hotspot region for LQTS. In silico predictions, functional data (if available), and location in structure are equivalent to phenotyping 10 individuals for Brugada syndrome (0 diagnosed with Brugada syndrome) and 5 individuals for LQTS (1 with LQTS). These data combined with observations of carriers lead us to estimate the LQTS penetrance for SCN5A S1073P around 37% (1/10) and the Brugada syndrome penetrance around 9% (0/10).

In Silico Data

PROVEAN PolyPhen-2 BLAST-PSSM REVEL Penetrance Density BrS (%) Penetrance Density LQT3 (%)
NA NA NA 0.575 5 50
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: - 0 0 0 0 -
VARIANT FEATURES ALONE: - 15 14 1 0 - -
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.

S1073P 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
1058 15 c.3171_3172delTGinsA,
1059 14 Q1059X,
1060 14
1061 13 E1061D,
1062 13 D1062H,
1063 12 E1063G,
1064 11 p.E1064del,
1065 11
1066 10 S1066G,
1067 9 L1067R,
1068 8 G1068D, G1068A,
1069 8 T1069M,
1070 7
1071 5 E1071K, p.E1071GfsX76,
1072 4 p.E1072del,
1073 0
1074 4 S1074G, S1074R,
1075 5
1076 7
1077 8 c.3228+2delT,
1078 8
1079 9 S1079F, S1079T, S1079Y,
1080 10
1081 11
1082 11 V1082A,
1083 12 S1083C,
1084 13 G1084R, G1084D, G1084S,
1085 13
1086 14
1087 14
1088 15 A1088T, A1088V,