rs374314562

Positions:

chr3-38575439-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2PP2BP4_Moderate

The NM_001099404.2(SCN5A):c.3524G>A(p.Arg1175His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000352 in 1,589,530 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 Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R1175C) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000034 ( 0 hom. )

Consequence

SCN5A
NM_001099404.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:6

Conservation

PhyloP100: 0.672

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant where missense usually causes diseases, SCN5A

BP4

Computational evidence support a benign effect (MetaRNN=0.2612486).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SCN5A	NM_001099404.2 linkuse as main transcript	c.3524G>A	p.Arg1175His	missense_variant	20/28	ENST00000413689.6
SCN5A	NM_000335.5 linkuse as main transcript	c.3521G>A	p.Arg1174His	missense_variant	20/28	ENST00000423572.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SCN5A	ENST00000413689.6 linkuse as main transcript	c.3524G>A	p.Arg1175His	missense_variant	20/28	5	NM_001099404.2	P4
SCN5A	ENST00000423572.7 linkuse as main transcript	c.3521G>A	p.Arg1174His	missense_variant	20/28	1	NM_000335.5	A1	Q14524-2

Frequencies

GnomAD3 genomes

AF:

0.0000460

AC:

AN:

152220

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

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:

0.0000441

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000435

AC:

AN:

229824

Hom.:

AF XY:

0.0000562

AC XY:

AN XY:

124566

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000614

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000108

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000485

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000341

AC:

AN:

1437310

Hom.:

Cov.:

AF XY:

0.0000450

AC XY:

AN XY:

710886

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000927

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000256

Gnomad4 SAS exome

AF:

0.0000239

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000338

Gnomad4 OTH exome

AF:

0.0000843

GnomAD4 genome

AF:

0.0000460

AC:

AN:

152220

Hom.:

Cov.:

AF XY:

0.0000538

AC XY:

AN XY:

74362

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000196

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.000478

Alfa

AF:

0.0000959

Hom.:

Bravo

AF:

0.0000604

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000412

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Apr 08, 2022	Identified in 1/8975 control individuals assembled from a combination of in-house controls and data from the 1000 Genomes Project and the NHLBI Exome Sequencing Project (Kapplinger et al., 2015); 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	Invitae	Nov 28, 2023	This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 1175 of the SCN5A protein (p.Arg1175His). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. 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: 406448). 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. -

Cardiac arrhythmia

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Mar 02, 2023	This missense variant replaces arginine with histidine at codon 1175 of the SCN5A protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with cardiovascular disorders in the literature. This variant has been identified in 10/229824 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	Dec 01, 2023	This missense variant replaces arginine with histidine at codon 1175 of the SCN5A protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with cardiovascular disorders in the literature. This variant has been identified in 10/229824 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. -

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

Sep 18, 2021

- -

Cardiovascular phenotype

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 07, 2020

The p.R1175H variant (also known as c.3524G>A), located in coding exon 19 of the SCN5A gene, results from a G to A substitution at nucleotide position 3524. The arginine at codon 1175 is replaced by histidine, an amino acid with highly similar properties, and is located in the DII/DIII region of the protein. This alteration was reported in one ostensibly healthy individual (Kapplinger JD et al. Circ Cardiovasc Genet, 2015 Aug;8:582-95). This amino acid position is not well conserved in available vertebrate species, and histidine is the reference amino acid in other vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. 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

Benign

0.070

CardioboostCm

Benign

0.0044

BayesDel_addAF

Uncertain

0.041

BayesDel_noAF

Benign

-0.18

CADD

Uncertain

DANN

Pathogenic

1.0

Eigen

Benign

-0.12

Eigen_PC

Benign

-0.078

FATHMM_MKL

Benign

0.46

M_CAP

Uncertain

0.20

MetaRNN

Benign

0.26

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

MetaSVM

Uncertain

-0.12

MutationTaster

Benign

0.80

N;N;N;N;N;N;N;N;N;N

PrimateAI

Benign

0.48

PROVEAN

Uncertain

-2.6

D;D;D;D;N;D;N;N;N

REVEL

Uncertain

0.36

Sift

Benign

0.15

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

Sift4G

Benign

0.17

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

Polyphen

0.21

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

Vest4

0.38

MVP

0.43

MPC

0.22

ClinPred

0.21

GERP RS

4.3

Varity_R

0.10

gMVP

0.77

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.

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