rs1060501144

Positions:

chr3-38550643-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM1PM2PP2

The NM_000335.5(SCN5A):c.5726G>A(p.Arg1909Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,461,702 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

SCN5A
NM_000335.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 7.91

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 5 ACMG points.

PM1

In a domain IQ (size 29) in uniprot entity SCN5A_HUMAN there are 5 pathogenic changes around while only 1 benign (83%) 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.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SCN5A	NM_001099404.2 linkuse as main transcript	c.5729G>A	p.Arg1910Lys	missense_variant	28/28	ENST00000413689.6	NP_001092874.1	Q14524H9KVD2
SCN5A	NM_000335.5 linkuse as main transcript	c.5726G>A	p.Arg1909Lys	missense_variant	28/28	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.5729G>A	p.Arg1910Lys	missense_variant	28/28	5	NM_001099404.2	ENSP00000410257.1		H9KVD2
SCN5A	ENST00000423572.7 linkuse as main transcript	c.5726G>A	p.Arg1909Lys	missense_variant	28/28	1	NM_000335.5	ENSP00000398266.2		Q14524-2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000401

AC:

AN:

249280

Hom.:

AF XY:

0.00000739

AC XY:

AN XY:

135228

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000885

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1461702

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

727128

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

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:

0.00000180

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Feb 07, 2020

This variant identified in the SCN5A gene is located in the cytoplasmic C-terminal region of the resulting protein (PMID: 25348405), but it is unclear how this variant impacts the function of this protein. In summary, this variant is a novel missense change with uncertain impact on protein function. It has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive, but these predictions have not been confirmed by published functional studies. This variant is not present in population databases (ExAC no frequency) and has not been reported in the literature in individuals with a SCN5A-related disease. This sequence change replaces arginine with lysine at codon 1910 of the SCN5A protein (p.Arg1910Lys). The arginine residue is highly conserved and there is a small physicochemical difference between arginine and lysine. -

Cardiovascular phenotype

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 21, 2020

The p.R1910K variant (also known as c.5729G>A), located in coding exon 27 of the SCN5A gene, results from a G to A substitution at nucleotide position 5729. The arginine at codon 1910 is replaced by lysine, an amino acid with highly similar properties, and is located in the cytoplasmic C-terminal region. 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

Benign

0.20

CardioboostCm

Uncertain

0.64

BayesDel_addAF

Pathogenic

0.36

BayesDel_noAF

Pathogenic

0.27

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.65

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

Eigen

Uncertain

0.45

Eigen_PC

Uncertain

0.49

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Benign

0.72

.;T;T;T;T;T;T;.;T

M_CAP

Pathogenic

0.41

MetaRNN

Uncertain

0.63

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

MetaSVM

Pathogenic

1.0

MutationAssessor

Uncertain

2.9

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

PrimateAI

Uncertain

0.64

PROVEAN

Benign

-1.9

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

REVEL

Pathogenic

0.75

Sift

Benign

0.14

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

Sift4G

Benign

0.19

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

Polyphen

0.22

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

Vest4

0.60

MutPred

0.47

.;.;Gain of methylation at R1910 (P = 0.0087);.;.;Gain of methylation at R1910 (P = 0.0087);.;.;.;

MVP

0.94

MPC

1.4

ClinPred

0.98

GERP RS

4.9

Varity_R

0.82

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.

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