chr3-38599026-C-G

Position:

chr3-38599026-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2PP2BP4

The ENST00000423572.7(SCN5A):c.1915G>C(p.Gly639Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000687 in 1,456,168 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as not provided (no stars). Another nucleotide change resulting in same amino acid change has been previously reported as Likely benignin ClinVar. Synonymous variant affecting the same amino acid position (i.e. G639G) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

SCN5A
ENST00000423572.7 missense

Scores

Clinical Significance

not provided no classification provided O:1

Conservation

PhyloP100: 2.12

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:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

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.

BP4

Computational evidence support a benign effect (MetaRNN=0.2837165).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SCN5A	NM_001099404.2 linkuse as main transcript	c.1915G>C	p.Gly639Arg	missense_variant	13/28	ENST00000413689.6	NP_001092874.1
SCN5A	NM_000335.5 linkuse as main transcript	c.1915G>C	p.Gly639Arg	missense_variant	13/28	ENST00000423572.7	NP_000326.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SCN5A	ENST00000413689.6 linkuse as main transcript	c.1915G>C	p.Gly639Arg	missense_variant	13/28	5	NM_001099404.2	ENSP00000410257	P4
SCN5A	ENST00000423572.7 linkuse as main transcript	c.1915G>C	p.Gly639Arg	missense_variant	13/28	1	NM_000335.5	ENSP00000398266	A1	Q14524-2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000406

AC:

AN:

246566

Hom.:

AF XY:

0.00

AC XY:

AN XY:

133972

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:

0.00

Gnomad OTH exome

AF:

0.000167

GnomAD4 exome

AF:

6.87e-7

AC:

AN:

1456168

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

723126

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000167

GnomAD4 genome

Cov.:

ClinVar

Significance: not provided

Submissions summary: Other:1

Revision: no classification provided

LINK: link

Submissions by phenotype

Congenital long QT syndrome

Other:1

not provided, no classification provided

literature only

Cardiovascular Biomedical Research Unit, Royal Brompton & Harefield NHS Foundation Trust

This variant has been reported as associated with Long QT syndrome in the following publications (PMID:16922724). This is a literature report, and does not necessarily reflect the clinical interpretation of the Imperial College / Royal Brompton Cardiovascular Genetics laboratory. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.075

CardioboostCm

Benign

0.015

BayesDel_addAF

Uncertain

0.13

BayesDel_noAF

Uncertain

-0.060

CADD

Benign

DANN

Benign

0.88

DEOGEN2

Benign

0.41

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

Eigen

Benign

-0.70

Eigen_PC

Benign

-0.51

FATHMM_MKL

Uncertain

0.87

LIST_S2

Uncertain

0.87

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

M_CAP

Uncertain

0.27

MetaRNN

Benign

0.28

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

MetaSVM

Benign

-0.66

MutationAssessor

Benign

1.1

.;L;.;.;.;L;.;.;.

MutationTaster

Benign

0.80

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

PrimateAI

Benign

0.34

PROVEAN

Benign

1.7

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

REVEL

Uncertain

0.49

Sift

Benign

0.79

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

Sift4G

Benign

0.61

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

Polyphen

0.0

B;B;.;B;.;B;B;.;.

Vest4

0.89

MutPred

0.68

Gain of glycosylation at P637 (P = 0.1215);Gain of glycosylation at P637 (P = 0.1215);Gain of glycosylation at P637 (P = 0.1215);Gain of glycosylation at P637 (P = 0.1215);Gain of glycosylation at P637 (P = 0.1215);Gain of glycosylation at P637 (P = 0.1215);Gain of glycosylation at P637 (P = 0.1215);Gain of glycosylation at P637 (P = 0.1215);Gain of glycosylation at P637 (P = 0.1215);

MVP

0.81

MPC

0.42

ClinPred

0.16

GERP RS

1.9

Varity_R

0.036

gMVP

0.55

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