rs6795580

chr3-38626082-C-G

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_001099404.2(SCN5A):c.393-3593G>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.548 in 152,100 control chromosomes in the GnomAD database, including 23,185 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.55 (23185 hom., cov: 32)
• Consequence: SCN5A NM_001099404.2 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.154

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]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.68).
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.591 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SCN5A	NM_000335.5	c.393-3593G>C		intron_variant		ENST00000423572.7
SCN5A	NM_001099404.2	c.393-3593G>C		intron_variant		ENST00000413689.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SCN5A	ENST00000413689.6	c.393-3593G>C		intron_variant		5	NM_001099404.2	P4
SCN5A	ENST00000423572.7	c.393-3593G>C		intron_variant		1	NM_000335.5	A1

Frequencies

GnomAD3 genomes AF: 0.548 AC: 83225 AN: 151982 Hom.: 23164 Cov.: 32

Gnomad AFR AF: 0.529

Gnomad AMI AF: 0.635

Gnomad AMR AF: 0.467

Gnomad ASJ AF: 0.596

Gnomad EAS AF: 0.349

Gnomad SAS AF: 0.552

Gnomad FIN AF: 0.506

Gnomad MID AF: 0.500

Gnomad NFE AF: 0.595

Gnomad OTH AF: 0.538

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.548 AC: 83298 AN: 152100 Hom.: 23185 Cov.: 32 AF XY: 0.538 AC XY: 40007 AN XY: 74344

Gnomad4 AFR AF: 0.529

Gnomad4 AMR AF: 0.466

Gnomad4 ASJ AF: 0.596

Gnomad4 EAS AF: 0.349

Gnomad4 SAS AF: 0.554

Gnomad4 FIN AF: 0.506

Gnomad4 NFE AF: 0.595

Gnomad4 OTH AF: 0.543

Alfa AF: 0.571 Hom.: 3142

Bravo AF: 0.542

Asia WGS AF: 0.458 AC: 1595 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.68
Cadd	Benign	6.5
Dann	Benign	0.82

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

Other links and lift over

dbSNP: rs6795580; hg19: chr3-38667573;