rs373118001

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1PM2PP2PP3

The NM_000335.5(SCN5A):​c.5689C>T​(p.Arg1897Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000341 in 1,613,986 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000066 ( 0 hom., cov: 33)
Exomes 𝑓: 0.000031 ( 0 hom. )

Consequence

SCN5A
NM_000335.5 missense

Scores

13
6
1

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:15

Conservation

PhyloP100: 3.54
Variant links:
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 Likely_pathogenic. Variant got 6 ACMG points.

PM1
In a region_of_interest Interaction with FGF13 (size 62) 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, 0.78

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect #exon/exons MANE Protein UniProt
SCN5ANM_001099404.2 linkuse as main transcriptc.5692C>T p.Arg1898Cys missense_variant 28/28 ENST00000413689.6 NP_001092874.1 Q14524H9KVD2
SCN5ANM_000335.5 linkuse as main transcriptc.5689C>T p.Arg1897Cys missense_variant 28/28 ENST00000423572.7 NP_000326.2 Q14524-2Q86V90

Ensembl

Gene Transcript HGVSc HGVSp Effect #exon/exons TSL MANE Protein Appris UniProt
SCN5AENST00000413689.6 linkuse as main transcriptc.5692C>T p.Arg1898Cys missense_variant 28/285 NM_001099404.2 ENSP00000410257.1 H9KVD2
SCN5AENST00000423572.7 linkuse as main transcriptc.5689C>T p.Arg1897Cys missense_variant 28/281 NM_000335.5 ENSP00000398266.2 Q14524-2

Frequencies

GnomAD3 genomes
AF:
0.0000657
AC:
10
AN:
152208
Hom.:
0
Cov.:
33
show subpopulations
Gnomad AFR
AF:
0.0000241
Gnomad AMI
AF:
0.00
Gnomad AMR
AF:
0.000131
Gnomad ASJ
AF:
0.00
Gnomad EAS
AF:
0.000387
Gnomad SAS
AF:
0.00
Gnomad FIN
AF:
0.00
Gnomad MID
AF:
0.00
Gnomad NFE
AF:
0.0000588
Gnomad OTH
AF:
0.000478
GnomAD3 exomes
AF:
0.0000321
AC:
8
AN:
249288
Hom.:
0
AF XY:
0.0000370
AC XY:
5
AN XY:
135232
show subpopulations
Gnomad AFR exome
AF:
0.00
Gnomad AMR exome
AF:
0.00
Gnomad ASJ exome
AF:
0.00
Gnomad EAS exome
AF:
0.0000556
Gnomad SAS exome
AF:
0.00
Gnomad FIN exome
AF:
0.00
Gnomad NFE exome
AF:
0.0000531
Gnomad OTH exome
AF:
0.000165
GnomAD4 exome
AF:
0.0000308
AC:
45
AN:
1461660
Hom.:
0
Cov.:
32
AF XY:
0.0000275
AC XY:
20
AN XY:
727104
show subpopulations
Gnomad4 AFR exome
AF:
0.00
Gnomad4 AMR exome
AF:
0.00
Gnomad4 ASJ exome
AF:
0.00
Gnomad4 EAS exome
AF:
0.0000504
Gnomad4 SAS exome
AF:
0.0000580
Gnomad4 FIN exome
AF:
0.00
Gnomad4 NFE exome
AF:
0.0000297
Gnomad4 OTH exome
AF:
0.0000663
GnomAD4 genome
AF:
0.0000656
AC:
10
AN:
152326
Hom.:
0
Cov.:
33
AF XY:
0.0000940
AC XY:
7
AN XY:
74468
show subpopulations
Gnomad4 AFR
AF:
0.0000240
Gnomad4 AMR
AF:
0.000131
Gnomad4 ASJ
AF:
0.00
Gnomad4 EAS
AF:
0.000388
Gnomad4 SAS
AF:
0.00
Gnomad4 FIN
AF:
0.00
Gnomad4 NFE
AF:
0.0000588
Gnomad4 OTH
AF:
0.000473
Alfa
AF:
0.000114
Hom.:
0
Bravo
AF:
0.0000340
ESP6500AA
AF:
0.00
AC:
0
ESP6500EA
AF:
0.000119
AC:
1
ExAC
AF:
0.0000248
AC:
3
Asia WGS
AF:
0.000289
AC:
1
AN:
3478
EpiCase
AF:
0.0000545
EpiControl
AF:
0.0000593

ClinVar

Significance: Uncertain significance
Submissions summary: Uncertain:15
Revision: criteria provided, multiple submitters, no conflicts
LINK: link

Submissions by phenotype

not provided Uncertain:3
Uncertain significance, criteria provided, single submitterclinical testingGeneDxMar 19, 2024Reported in patients with clinically diagnosed Brugada syndrome, some of whom harbored additional cardiogenetic variants (PMID: 26173111, 27707468, 29306897, 25904541); Published functional studies suggest a damaging effect (PMID: 32533946); 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: 25904541, 27707468, 30662450, 34426522, 32880476, 30847666, 26746457, 30203441, 34621001, 26173111, 29306897, 29447731, 32533946) -
Uncertain significance, no assertion criteria providedclinical testingClinical Genetics, Academic Medical Center-- -
Uncertain significance, no assertion criteria providedclinical testingJoint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+-- -
Brugada syndrome 1 Uncertain:2
Uncertain significance, criteria provided, single submitterclinical testingMendelicsMay 28, 2019- -
Uncertain significance, criteria provided, single submitterclinical testingIllumina Laboratory Services, IlluminaApr 27, 2017This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. However, the evidence from the literature, in combination with allele frequency data from public databases where available, was not sufficient to rule this variant in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -
Cardiac arrhythmia Uncertain:2
Uncertain significance, criteria provided, single submitterclinical testingColor Diagnostics, LLC DBA Color HealthJan 27, 2023This missense variant replaces arginine with cysteine at codon 1898 of the SCN5A protein. Computational prediction suggests that this variant may have deleterious impact on protein structure and function (internally defined REVEL score threshold >= 0.7, PMID: 27666373). A functional study has shown that this variant had 28% of the peak current density compared to wild type (PMID: 32533946). This variant has been reported in two individuals affected with Brugada syndrome (PMID: 26173111, 29306897). One of these individuals carried a pathogenic truncation variant in the same gene that could explain the observed phenotype. This variant has also been reported in an individual affected with noncompaction cardiomyopathy (PMID: 29447731). This variant has been identified in 10/280692 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -
Uncertain significance, criteria provided, single submitterclinical testingAll of Us Research Program, National Institutes of HealthDec 01, 2023This missense variant replaces arginine with cysteine at codon 1898 of the SCN5A protein. Computational prediction suggests that this variant may have deleterious impact on protein structure and function (internally defined REVEL score threshold >= 0.7, PMID: 27666373). A functional study has shown that the variant protein exhibit 28% of the peak current density compared to wild type protein (PMID: 32533946). This variant has been reported in two individuals affected with Brugada syndrome (PMID: 26173111, 29306897). One of these individuals carried a pathogenic truncation variant in the same gene that could explain the observed phenotype. This variant has also been reported in an individual affected with noncompaction cardiomyopathy (PMID: 29447731). This variant has been identified in 10/280692 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -
not specified Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingWomen's Health and Genetics/Laboratory Corporation of America, LabCorpAug 09, 2023Variant summary: SCN5A c.5692C>T (p.Arg1898Cys) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 3.2e-05 in 249288 control chromosomes (gnomAD). The variant, c.5692C>T, has been reported in the literature in at least two individuals affected with Brugada syndrome, however one of these patient also carried a potentially pathogenic SCN5A variant (Selga_2015, Zhang_2016, Huang_2018). In addition, the variant has been reported in at least two patients affected with noncompaction cardiomyopathy and dilated cardiomyopathy, however without strong evidence for causality (van Waning_2018, van Lint_2019, Verdonschot_2020). These data do not allow any conclusion about variant significance. At least one publication reports experimental evidence evaluating an impact on protein function, and demonstrated a reduced ion channel current, indicating a partial loss of function for the variant protein (Glazer_2020). The following publications have been ascertained in the context of this evaluation (PMID: 32533946, 26173111, 25904541, 27707468, 29306897, 29447731, 30847666, 32880476). Six submitters have cited clinical-significance assessments for this variant to ClinVar after 2014. All submitters classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as VUS-possibly pathogenic. -
Ventricular fibrillation, paroxysmal familial, type 1 Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingIllumina Laboratory Services, IlluminaApr 27, 2017This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -
Dilated cardiomyopathy 1E Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingIllumina Laboratory Services, IlluminaApr 27, 2017This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -
Brugada syndrome Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingLabcorp Genetics (formerly Invitae), LabcorpNov 01, 2022This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 1898 of the SCN5A protein (p.Arg1898Cys). This variant is present in population databases (rs373118001, gnomAD 0.006%). This missense change has been observed in individual(s) with Brugada syndrome and/or dilated cardiomyopathy (PMID: 26173111, 29306897, 30847666, 32880476). ClinVar contains an entry for this variant (Variation ID: 518750). Advanced modeling performed at Invitae incorporating data from internal and/or published experimental studies (PMID: 32533946) indicates that this missense variant is expected to disrupt SCN5A function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -
Sick sinus syndrome 1 Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingIllumina Laboratory Services, IlluminaApr 27, 2017This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -
Progressive familial heart block, type 1A Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingIllumina Laboratory Services, IlluminaApr 27, 2017This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -
Long QT syndrome 3 Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingIllumina Laboratory Services, IlluminaApr 27, 2017This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -
Cardiovascular phenotype Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingAmbry GeneticsMar 23, 2023The p.R1898C variant (also known as c.5692C>T), located in coding exon 27 of the SCN5A gene, results from a C to T substitution at nucleotide position 5692. The arginine at codon 1898 is replaced by cysteine, an amino acid with highly dissimilar properties. This alteration has been reported in Brugada syndrome and sudden unexplained nocturnal death cohorts; however, clinical details were limited and the sudden death case also had a second SCN5A variant detected (Selga E et al. PLoS ONE, 2015 Jul;10:e0132888; Zhang L et al. Mayo Clin. Proc., 2016 Nov;91:1503-1514). This variant has also been detected in individuals reported to have dilated cardiomyopathy or noncompaction cardiomyopathy; however, clinical details were limited and some reports may overlap (van Waning JI et al. J Am Coll Cardiol. 2018 Feb;71(7):711-722; van Lint FHM et al. Neth Heart J. 2019 Jun;27(6):304-309; Verdonschot JAJ et al. Circ Genom Precis Med. 2020 Oct;13(5):476-487). In addition, this variant has been detected in cohorts not selected for the presence of cardiovascular disease; however, details were limited (Chetruengchai W et al. J Hum Genet. 2022 Mar;67(3):137-142; Kars ME et al. Proc Natl Acad Sci U S A. 2021 Sep;118(36)). Functional studies suggest this variant may result in reduced ion channel current; however, additional evidence is needed to confirm this finding (Glazer AM et al. Am J Hum Genet. 2020 Jul;107(1):111-123).This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
0.59
CardioboostCm
Uncertain
0.24
BayesDel_addAF
Pathogenic
0.30
D
BayesDel_noAF
Pathogenic
0.37
CADD
Pathogenic
29
DANN
Pathogenic
1.0
DEOGEN2
Pathogenic
0.86
.;.;.;.;.;D;.;.;.
Eigen
Uncertain
0.37
Eigen_PC
Uncertain
0.36
FATHMM_MKL
Pathogenic
0.98
D
LIST_S2
Uncertain
0.93
.;D;D;D;D;D;D;.;D
M_CAP
Pathogenic
0.68
D
MetaRNN
Pathogenic
0.78
D;D;D;D;D;D;D;D;D
MetaSVM
Pathogenic
1.1
D
MutationAssessor
Pathogenic
3.1
.;.;.;.;.;M;.;.;.
PrimateAI
Pathogenic
0.80
T
PROVEAN
Pathogenic
-5.7
D;D;D;D;D;D;D;D;D
REVEL
Pathogenic
0.81
Sift
Uncertain
0.020
D;D;D;D;D;D;D;D;D
Sift4G
Uncertain
0.0090
D;D;D;D;D;D;D;D;D
Polyphen
0.37
B;B;.;B;.;D;D;.;.
Vest4
0.88
MVP
0.81
MPC
1.7
ClinPred
0.82
D
GERP RS
4.0
Varity_R
0.68
gMVP
0.95

Splicing

Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
0.0
Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Other links and lift over

dbSNP: rs373118001; hg19: chr3-38592171; COSMIC: COSV61136840; COSMIC: COSV61136840; API