3-38604004-C-T

Position:

chr3-38604004-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 5P and 1B. PM2PM5PP2BP4

The NM_000335.5(SCN5A):c.1598G>A(p.Arg533His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000378 in 1,613,506 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R533C) has been classified as Likely pathogenic.

Frequency

Genomes: 𝑓 0.000092 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000032 ( 0 hom. )

Consequence

SCN5A
NM_000335.5 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:16B:1

Conservation

PhyloP100: 0.896

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]

SCN5A links:

SCN5A (HGNC:):

SCN5A links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr3-38604005-G-A is described in Lovd as [Likely_pathogenic].

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.

BP4

Computational evidence support a benign effect (MetaRNN=0.34710735).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SCN5A	NM_001099404.2 linkuse as main transcript	c.1598G>A	p.Arg533His	missense_variant	12/28	ENST00000413689.6	NP_001092874.1	Q14524H9KVD2
SCN5A	NM_000335.5 linkuse as main transcript	c.1598G>A	p.Arg533His	missense_variant	12/28	ENST00000423572.7	NP_000326.2	Q14524-2Q86V90

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SCN5A	ENST00000413689.6 linkuse as main transcript	c.1598G>A	p.Arg533His	missense_variant	12/28	5	NM_001099404.2	ENSP00000410257.1		H9KVD2
SCN5A	ENST00000423572.7 linkuse as main transcript	c.1598G>A	p.Arg533His	missense_variant	12/28	1	NM_000335.5	ENSP00000398266.2		Q14524-2

Frequencies

GnomAD3 genomes

AF:

0.0000920

AC:

AN:

152160

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000606

AC:

AN:

247590

Hom.:

AF XY:

0.0000744

AC XY:

AN XY:

134408

show subpopulations

Gnomad AFR exome

AF:

0.000393

Gnomad AMR exome

AF:

0.0000291

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000164

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000268

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000322

AC:

AN:

1461228

Hom.:

Cov.:

AF XY:

0.0000316

AC XY:

AN XY:

726838

show subpopulations

Gnomad4 AFR exome

AF:

0.000299

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000151

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000153

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.0000919

AC:

AN:

152278

Hom.:

Cov.:

AF XY:

0.0000806

AC XY:

AN XY:

74460

show subpopulations

Gnomad4 AFR

AF:

0.000241

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.0000277

Hom.:

Bravo

AF:

0.000125

ESP6500AA

AF:

0.000489

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000992

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:16Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:3

Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 20, 2024	This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 533 of the SCN5A protein (p.Arg533His). This variant is present in population databases (rs146848219, gnomAD 0.03%). This variant has not been reported in the literature in individuals affected with SCN5A-related conditions. ClinVar contains an entry for this variant (Variation ID: 180512). 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. 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. -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Aug 26, 2020	Reported in a patient with Brugada syndrome in an abstract presented at a Heart Rhythm Society meeting (Tan et al., 2012); Reported in ClinVar as a variant of uncertain significance (ClinVar Variant ID#180512; Landrum et al., 2016); 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) -
Uncertain significance, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Nov 14, 2019	- -

Brugada syndrome

Uncertain:2

Uncertain significance, no assertion criteria provided	clinical testing	Blueprint Genetics	Oct 14, 2014	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jun 14, 2016	- -

Cardiac arrhythmia

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Apr 07, 2023	This missense variant replaces arginine with histidine at codon 533 of the SCN5A protein. Computational prediction is inconclusive regarding the impact of this variant on protein structure and function (internally defined REVEL score threshold 0.5 < inconclusive < 0.7, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with SCN5A-related disorders in the literature. This variant has been identified in 16/278974 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 submitter	clinical testing	All of Us Research Program, National Institutes of Health	Jul 20, 2024	This missense variant replaces arginine with histidine at codon 533 of the SCN5A protein. Computational prediction is inconclusive regarding the impact of this variant on protein structure and function (internally defined REVEL score threshold 0.5 < inconclusive < 0.7, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with SCN5A-related disorders in the literature. This variant has been identified in 16/278974 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. -

Progressive familial heart block

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Cardiomyopathy

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario

Nov 29, 2021

- -

SUDDEN INFANT DEATH SYNDROME;C1832680:Dilated cardiomyopathy 1E;C1837845:Sick sinus syndrome 1;C1859062:Long QT syndrome 3;C1879286:Progressive familial heart block, type 1A;C2751898:Ventricular fibrillation, paroxysmal familial, type 1;C3151464:Atrial fibrillation, familial, 10;C4551804:Brugada syndrome 1

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Oct 16, 2021

- -

Congenital long QT syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Dilated cardiomyopathy 1E

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

New York Genome Center

Jun 24, 2022

The c.1598G>A variant has not previously been reported in affected individuals and it has been deposited in ClinVar [ClinVar ID: 180512] as Variant of Uncertain Significance by multiple submitters. The c.1598G>A variant is observed in 51 alleles (0.0086% minor allele frequency with 0 homozygotes) in population databases(gnomAD v2.1.1 and v3.1.2, TOPMed Freeze 8). This variant has been reported in 3 control individuals (out of 8,975 individuals) and has not been detected in a cohort of Brugada syndrome and long QT cases (PMID: 25904541). The c.1598G>A variant is located in exon 12 of this 28-exon gene and is predicted to replace an evolutionarily conserved arginine amino acid with histidine at position 533 in the interdomain linker of DI/DII region in the encoded protein [PMID: 30364184]. In silico predictions are in favor of damaging effect for p.(Arg533His) variant [(CADD v1.6 = 23.1, REVEL = 0.662)]; however, there are no functional studies to support or refute these predictions. Two different missense variants p.(Arg533Ser) and p.(Arg533Cys) affecting the same amino acid have been reported in ClinVar [ClinVar ID:918769and 575108] as a Variant of Uncertain Significance with arrhythmia phenotype. Based on available evidence this c.1598G>A p.(Arg533His) variant identified in SCN5A is classified as a Variant of Uncertain Significance. -

Paroxysmal familial ventricular fibrillation

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Dilated Cardiomyopathy, Dominant

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Long QT syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Sick sinus syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Cardiovascular phenotype

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 16, 2021

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.093

CardioboostCm

Benign

0.014

BayesDel_addAF

Uncertain

0.053

BayesDel_noAF

Pathogenic

0.14

CADD

Uncertain

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.76

.;.;.;.;.;D;.;.;.

Eigen

Uncertain

0.28

Eigen_PC

Benign

0.21

FATHMM_MKL

Benign

0.46

LIST_S2

Uncertain

0.97

.;D;D;D;D;D;D;.;D

M_CAP

Pathogenic

0.65

MetaRNN

Benign

0.35

T;T;T;T;T;T;T;T;T

MetaSVM

Pathogenic

1.1

MutationAssessor

Uncertain

2.5

.;M;.;.;.;M;.;.;.

PrimateAI

Benign

0.39

PROVEAN

Uncertain

-3.9

D;D;D;D;D;D;D;D;D

REVEL

Pathogenic

0.66

Sift

Uncertain

0.0010

D;D;D;D;D;D;D;D;D

Sift4G

Benign

0.11

T;T;T;T;T;T;T;T;T

Polyphen

0.41

B;D;.;B;.;D;D;.;.

Vest4

0.31

MVP

0.94

MPC

1.3

ClinPred

0.21

GERP RS

4.3

Varity_R

0.41

gMVP

0.60

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over