rs199473116

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP2

The NM_001099404.2(SCN5A):c.1425A>C(p.Arg475Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000174 in 1,613,828 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. R475T) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00012 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000062 ( 0 hom. )

Consequence

SCN5A
NM_001099404.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:5O:1

Conservation

PhyloP100: -0.0610

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 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant where missense usually causes diseases, SCN5A

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SCN5A	NM_001099404.2 linkuse as main transcript	c.1425A>C	p.Arg475Ser	missense_variant	11/28	ENST00000413689.6
SCN5A	NM_000335.5 linkuse as main transcript	c.1425A>C	p.Arg475Ser	missense_variant	11/28	ENST00000423572.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SCN5A	ENST00000413689.6 linkuse as main transcript	c.1425A>C	p.Arg475Ser	missense_variant	11/28	5	NM_001099404.2	P4
SCN5A	ENST00000423572.7 linkuse as main transcript	c.1425A>C	p.Arg475Ser	missense_variant	11/28	1	NM_000335.5	A1	Q14524-2

Frequencies

GnomAD3 genomes

AF:

0.000125

AC:

AN:

152166

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000386

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000197

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000120

AC:

AN:

249098

Hom.:

AF XY:

0.0000222

AC XY:

AN XY:

135126

show subpopulations

Gnomad AFR exome

AF:

0.000194

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000616

AC:

AN:

1461662

Hom.:

Cov.:

AF XY:

0.00000550

AC XY:

AN XY:

727102

show subpopulations

Gnomad4 AFR exome

AF:

0.000209

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

8.99e-7

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.000125

AC:

AN:

152166

Hom.:

Cov.:

AF XY:

0.000148

AC XY:

AN XY:

74336

show subpopulations

Gnomad4 AFR

AF:

0.000386

Gnomad4 AMR

AF:

0.000197

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000322

Hom.:

Bravo

AF:

0.000117

ESP6500AA

AF:

0.000511

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000248

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:5Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Cardiac arrhythmia

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	All of Us Research Program, National Institutes of Health	Sep 05, 2023	This missense variant replaces arginine with serine at codon 475 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 been reported in two healthy, African American individuals in the literature (PMID: 20129283, 15851227). This variant has been identified in 9/280488 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	Color Diagnostics, LLC DBA Color Health	Nov 09, 2022	This missense variant replaces arginine with serine at codon 475 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 been reported in two healthy, African American individuals in the literature (PMID: 20129283, 15851227). This variant has been identified in 9/280488 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 provided

Uncertain:1Other:1

not provided, no classification provided	literature only	Cardiovascular Biomedical Research Unit, Royal Brompton & Harefield NHS Foundation Trust	-	This variant has been reported in the following publications (PMID:19841300;PMID:20129283). -
Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Dec 12, 2023	This sequence change replaces arginine, which is basic and polar, with serine, which is neutral and polar, at codon 475 of the SCN5A protein (p.Arg475Ser). This variant is present in population databases (rs199473116, gnomAD 0.04%). 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: 67662). 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 tolerated. 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. -

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 21, 2021

- -

Cardiovascular phenotype

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 27, 2023

The p.R475S variant (also known as c.1425A>C), located in coding exon 10 of the SCN5A gene, results from an A to C substitution at nucleotide position 1425. The arginine at codon 475 is replaced by serine, an amino acid with dissimilar properties. This variant has been detected in a cohort of individuals with pacemakers (Celestino-Soper PB et al. PLoS One. 2016 Jan;11(1):e0147455); however, detail was limited. This variant has also been detected in ostensibly healthy cohorts (Ackerman MJ et al. Heart Rhythm, 2004 Nov;1:600-7; Kapplinger JD et al. Heart Rhythm, 2010 Jan;7:33-46). This alteration has also been reported in a sudden death cohort and a pediatric dilated cardiomyopathy (DCM) cohort (Salfati EL et al. Genome Med, 2019 Dec;11:83; Khan RS et al. J Am Heart Assoc, 2022 Jan;11:e022854). This amino acid position is well conserved in available 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

0.30

CardioboostArm

Benign

0.000048

CardioboostCm

Benign

0.0032

BayesDel_addAF

Benign

-0.18

BayesDel_noAF

Benign

-0.13

Cadd

Benign

Dann

Uncertain

0.99

Eigen

Benign

-0.23

Eigen_PC

Benign

-0.29

FATHMM_MKL

Benign

0.54

M_CAP

Pathogenic

0.52

MetaRNN

Uncertain

0.68

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

MetaSVM

Uncertain

0.33

MutationTaster

Benign

0.87

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

PrimateAI

Benign

0.46

PROVEAN

Pathogenic

-4.7

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

REVEL

Uncertain

0.47

Sift

Benign

0.12

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

Sift4G

Benign

0.35

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

Polyphen

0.99

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

Vest4

0.60

MutPred

0.29

Gain of phosphorylation at R475 (P = 0.0034);Gain of phosphorylation at R475 (P = 0.0034);Gain of phosphorylation at R475 (P = 0.0034);Gain of phosphorylation at R475 (P = 0.0034);Gain of phosphorylation at R475 (P = 0.0034);Gain of phosphorylation at R475 (P = 0.0034);Gain of phosphorylation at R475 (P = 0.0034);Gain of phosphorylation at R475 (P = 0.0034);Gain of phosphorylation at R475 (P = 0.0034);

MVP

0.76

MPC

0.51

ClinPred

0.53

GERP RS

2.4

Varity_R

0.18

gMVP

0.64

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