rs17215493

Positions:

• chr3-38606792-G-A

Variant summary

Our verdict is Benign. Variant got -17 ACMG points: 0P and 17B. BP4_Strong BP6_Very_Strong BP7 BS2

The NM_000335.5(SCN5A):​c.1017C>T​(p.Tyr339Tyr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000565 in 1,613,514 control chromosomes in the GnomAD database, including 6 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0033 (4 hom., cov: 33)
  • Exomes 𝑓: 0.00028 (2 hom.)
• Consequence: SCN5A NM_000335.5 synonymous
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:15
• Conservation: PhyloP100: 0.487

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 (HGNC:):

ACMG classification

Verdict is Benign. Variant got -17 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.57).
• BP6: Variant 3-38606792-G-A is Benign according to our data. Variant chr3-38606792-G-A is described in ClinVar as [Benign]. Clinvar id is 227057.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr3-38606792-G-A is described in Lovd as [Benign]. Variant chr3-38606792-G-A is described in Lovd as [Likely_benign].
• BP7: Synonymous conserved (PhyloP=0.487 with no splicing effect.
• BS2: High Homozygotes in GnomAd4 at 4 SD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SCN5A	NM_001099404.2	c.1017C>T	p.Tyr339Tyr	synonymous_variant	9/28	ENST00000413689.6	NP_001092874.1
SCN5A	NM_000335.5	c.1017C>T	p.Tyr339Tyr	synonymous_variant	9/28	ENST00000423572.7	NP_000326.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SCN5A	ENST00000413689.6	c.1017C>T	p.Tyr339Tyr	synonymous_variant	9/28	5	NM_001099404.2	ENSP00000410257.1
SCN5A	ENST00000423572.7	c.1017C>T	p.Tyr339Tyr	synonymous_variant	9/28	1	NM_000335.5	ENSP00000398266.2

Frequencies

GnomAD3 genomes AF: 0.00334 AC: 509 AN: 152236 Hom.: 4 Cov.: 33

Gnomad AFR AF: 0.0105

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00412

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000770

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000441

Gnomad OTH AF: 0.00239

GnomAD3 exomes AF: 0.000898 AC: 223 AN: 248414 Hom.: 3 AF XY: 0.000661 AC XY: 89 AN XY: 134718

Gnomad AFR exome AF: 0.0119

Gnomad AMR exome AF: 0.000609

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000612

Gnomad SAS exome AF: 0.0000654

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000178

Gnomad OTH exome AF: 0.000497

GnomAD4 exome AF: 0.000276 AC: 403 AN: 1461160 Hom.: 2 Cov.: 31 AF XY: 0.000257 AC XY: 187 AN XY: 726822

Gnomad4 AFR exome AF: 0.00827

Gnomad4 AMR exome AF: 0.00101

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.000252

Gnomad4 SAS exome AF: 0.0000464

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000144

Gnomad4 OTH exome AF: 0.000828

GnomAD4 genome AF: 0.00334 AC: 509 AN: 152354 Hom.: 4 Cov.: 33 AF XY: 0.00344 AC XY: 256 AN XY: 74496

Gnomad4 AFR AF: 0.0104

Gnomad4 AMR AF: 0.00411

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.000771

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000441

Gnomad4 OTH AF: 0.00237

Alfa AF: 0.00147 Hom.: 0

Bravo AF: 0.00411

EpiCase AF: 0.0000545

EpiControl AF: 0.0000593

ClinVar

Significance: Benign

Submissions summary: Benign:15

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:7

Benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Feb 02, 2018	- -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 31, 2024	- -
Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	May 01, 2023	SCN5A: BP4, BP7, BS1, BS2 -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Mar 03, 2015	- -
Likely benign, no assertion criteria provided	clinical testing	Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	-	- -
Likely benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -

not specified Benign:4

Benign, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Mar 19, 2012	p.Tyr339Tyr in Exon 09 of SCN5A: This variant is not expected to have clinical s ignificance because it does not alter an amino acid residue, is not located with in the splice consensus sequence and has been identified in 0.9% (32/3422) of Af rican American chromosomes from a broad population by the NHLBI Exome Sequencing Project (http://evs.gs.washington.edu/EVS; dbSNP rs17215493). -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -
Benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -
Benign, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -

Cardiac arrhythmia Benign:2

Benign, criteria provided, single submitter	clinical testing	All of Us Research Program, National Institutes of Health	Feb 05, 2024	- -
Benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Oct 18, 2018	- -

SCN5A-related disorder Benign:1

Benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

May 03, 2019

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Cardiovascular phenotype Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 06, 2016

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.57
CADD	Benign	6.4
DANN	Benign	0.44

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs17215493; hg19: chr3-38648283;