rs878855292
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Variant summary
Our verdict is Pathogenic. Variant got 17 ACMG points: 17P and 0B. PM1PM2PP2PP3_StrongPP5_Very_Strong
The NM_000335.5(SCN5A):c.4891C>T(p.Arg1631Cys) variant causes a missense change. The variant allele was found at a frequency of 0.00000248 in 1,613,886 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 13/22 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★).
Frequency
Genomes: 𝑓 0.0000066 ( 0 hom., cov: 31)
Exomes 𝑓: 0.0000021 ( 0 hom. )
Consequence
SCN5A
NM_000335.5 missense
NM_000335.5 missense
Scores
19
1
Clinical Significance
Conservation
PhyloP100: 6.75
Genes affected
SCN5A (HGNC:10593): (sodium voltage-gated channel alpha subunit 5) The protein encoded by this gene is an integral membrane protein and tetrodotoxin-resistant voltage-gated sodium channel subunit. This protein is found primarily in cardiac muscle and is responsible for the initial upstroke of the action potential in an electrocardiogram. Defects in this gene have been associated with long QT syndrome type 3 (LQT3), atrial fibrillation, cardiomyopathy, and Brugada syndrome 1, all autosomal dominant cardiac diseases. Alternative splicing results in several transcript variants encoding different isoforms. [provided by RefSeq, May 2022]
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ACMG classification
Classification made for transcript
Verdict is Pathogenic. Variant got 17 ACMG points.
PM1
In a transmembrane_region Helical; Name=S4 of repeat IV (size 16) in uniprot entity SCN5A_HUMAN there are 5 pathogenic changes around while only 0 benign (100%) in NM_000335.5
PM2
Very rare variant in population databases, with high coverage;
PP2
Missense variant in gene, where missense usually causes diseases (based on misZ statistic), SCN5A. . Gene score misZ 2.7504 (greater than the threshold 3.09). Trascript score misZ 4.8279 (greater than threshold 3.09). GenCC has associacion of gene with progressive familial heart block, type 1A, Brugada syndrome, familial sick sinus syndrome, short QT syndrome, paroxysmal familial ventricular fibrillation, progressive familial heart block, long QT syndrome 3, familial atrial fibrillation, catecholaminergic polymorphic ventricular tachycardia, dilated cardiomyopathy, dilated cardiomyopathy 1E, arrhythmogenic right ventricular cardiomyopathy, Brugada syndrome 1, atrial standstill, familial isolated dilated cardiomyopathy, familial long QT syndrome, sick sinus syndrome 1.
PP3
MetaRNN computational evidence supports a deleterious effect, 0.992
PP5
Variant 3-38551478-G-A is Pathogenic according to our data. Variant chr3-38551478-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 242199.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr3-38551478-G-A is described in Lovd as [Likely_pathogenic].
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
SCN5A | NM_001099404.2 | c.4894C>T | p.Arg1632Cys | missense_variant | 28/28 | ENST00000413689.6 | NP_001092874.1 | |
SCN5A | NM_000335.5 | c.4891C>T | p.Arg1631Cys | missense_variant | 28/28 | ENST00000423572.7 | NP_000326.2 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
SCN5A | ENST00000413689.6 | c.4894C>T | p.Arg1632Cys | missense_variant | 28/28 | 5 | NM_001099404.2 | ENSP00000410257.1 | ||
SCN5A | ENST00000423572.7 | c.4891C>T | p.Arg1631Cys | missense_variant | 28/28 | 1 | NM_000335.5 | ENSP00000398266.2 |
Frequencies
GnomAD3 genomes AF: 0.00000657 AC: 1AN: 152096Hom.: 0 Cov.: 31
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GnomAD3 exomes AF: 0.00000398 AC: 1AN: 251352Hom.: 0 AF XY: 0.00 AC XY: 0AN XY: 135842
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GnomAD4 exome AF: 0.00000205 AC: 3AN: 1461790Hom.: 0 Cov.: 35 AF XY: 0.00000138 AC XY: 1AN XY: 727182
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GnomAD4 genome AF: 0.00000657 AC: 1AN: 152096Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0AN XY: 74302
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ClinVar
Significance: Pathogenic
Submissions summary: Pathogenic:3
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
not provided Pathogenic:2
Pathogenic, criteria provided, single submitter | clinical testing | GeneDx | Dec 12, 2024 | Published functional studies showed that p.(R1632C) resulted in loss of sodium channel availability (PMID: 26031372); Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 26031372, 30193851, 31191357, 33131149, 33221895, 30935997, 33164571, 30203441, 33797273, 26582918, 31928070, 27082542) - |
Pathogenic, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Apr 18, 2023 | For these reasons, this variant has been classified as Pathogenic. Experimental studies have shown that this missense change affects SCN5A function (PMID: 26031372). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. ClinVar contains an entry for this variant (Variation ID: 242199). This missense change has been observed in individuals with Brugada syndrome (PMID: 26031372, 27082542, 31191357). It has also been observed to segregate with disease in related individuals. This variant is present in population databases (no rsID available, gnomAD 0.0009%). This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 1632 of the SCN5A protein (p.Arg1632Cys). - |
Cardiovascular phenotype Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Ambry Genetics | Sep 05, 2020 | The p.R1632C pathogenic mutation (also known as c.4894C>T), located in coding exon 27 of the SCN5A gene, results from a C to T substitution at nucleotide position 4894. The arginine at codon 1632 is replaced by cysteine, an amino acid with highly dissimilar properties, and is located in the DIV-S4 transmembrane region. This variant has been detected in unrelated probands with Brugada syndrome (BrS) and has shown some segregation with disease in families (Nakajima T et al. Heart Rhythm, 2015 Nov;12:2296-304; García-Molina E et al. Mol Med Rep, 2016 Jun;13:4677-80; Monasky MM et al. Front Physiol, 2019 May;10:666). Internal structural analysis indicates that the arginine impacted by this alteration is part of a highly conserved set of residues that generate a characteristic motif necessary to the function of voltage-sensing channels (Gandhi CS et al. J. Gen. Physiol., 2002 Oct;120:455-63; Starace DM et al. Nature, 2004 Feb;427:548-53). In vitro functional studies have indicated that this variant may impact channel kinetics, and a deep mutational scanning study categorized this alteration as a possible loss of function alteration (Nakajima T et al. Heart Rhythm, 2015 Nov;12:2296-304; Glazer AM et al. Circ Genom Precis Med, 2020 02;13:e002786). Other variants affecting this codon (p.R1632H, c.4895G>A and p.R1632L, c.4895G>T) have also been reported in association with arrhythmias, including Brugada syndrome (Benson DW et al. J. Clin. Invest. 2003;112:1019-28; Batchvarov VN et al. J Electrocardiol;44:308). Based on the supporting evidence, this alteration is interpreted as a disease-causing mutation. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
CardioboostCm
Pathogenic
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
CADD
Pathogenic
DANN
Pathogenic
DEOGEN2
Pathogenic
.;.;.;.;.;D;.;.;.
Eigen
Pathogenic
Eigen_PC
Pathogenic
FATHMM_MKL
Pathogenic
D
LIST_S2
Pathogenic
.;D;D;D;D;D;D;.;D
M_CAP
Pathogenic
D
MetaRNN
Pathogenic
D;D;D;D;D;D;D;D;D
MetaSVM
Pathogenic
D
MutationAssessor
Pathogenic
.;.;.;.;.;H;.;.;.
PrimateAI
Pathogenic
D
PROVEAN
Pathogenic
D;D;D;D;D;D;D;D;D
REVEL
Pathogenic
Sift
Pathogenic
D;D;D;D;D;D;D;D;D
Sift4G
Pathogenic
D;D;D;D;D;D;D;D;D
Polyphen
D;D;.;D;.;D;D;.;.
Vest4
MutPred
0.95
.;.;Gain of methylation at R1629 (P = 0.0595);.;.;Gain of methylation at R1629 (P = 0.0595);.;.;.;
MVP
MPC
1.7
ClinPred
D
GERP RS
Varity_R
gMVP
Splicing
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at