rs41313699

Variant names:

• chr3-38605987-G-A
• rs41313699
• NM_001099404.2:c.1302C>T

Variant summary

Our verdict is Benign. The variant received -19 ACMG points: 0P and 19B. BP4_Moderate BP6_Very_Strong BP7 BS1 BS2

The NM_000335.5(SCN5A):​c.1302C>T​(p.Phe434Phe) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00235 in 1,612,222 control chromosomes in the GnomAD database, including 84 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.012 (39 hom., cov: 32)
  • Exomes 𝑓: 0.0013 (45 hom.)
• Consequence: SCN5A NM_000335.5 synonymous
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:18
• Conservation: PhyloP100: 1.37
• Publications: 3 publications found

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 Gene-Disease associations (from GenCC):

• Brugada syndrome

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
• Brugada syndrome 1

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine, Genomics England PanelApp, G2P, Ambry Genetics
• cardiac rhythm disease

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• dilated cardiomyopathy

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• dilated cardiomyopathy 1E

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
• familial long QT syndrome

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• long QT syndrome 3

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
• progressive familial heart block, type 1A

  Inheritance: AD, SD Classification: STRONG, MODERATE Submitted by: Genomics England PanelApp, Ambry Genetics
• sick sinus syndrome 1

  Inheritance: AR, AD Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae)
• atrial standstill

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• familial atrial fibrillation

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• familial isolated dilated cardiomyopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• familial sick sinus syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• paroxysmal familial ventricular fibrillation

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• progressive familial heart block

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• arrhythmogenic right ventricular cardiomyopathy

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen
• catecholaminergic polymorphic ventricular tachycardia

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
• congenital heart disease

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
• short QT syndrome

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Benign. The variant received -19 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.41).
• BP6: Variant 3-38605987-G-A is Benign according to our data. Variant chr3-38605987-G-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 48282.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=1.37 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.0125 (1897/152292) while in subpopulation AFR AF = 0.0434 (1804/41566). AF 95% confidence interval is 0.0417. There are 39 homozygotes in GnomAd4. There are 878 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.
• BS2: High Homozygotes in GnomAd4 at 39 SD,AD,AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000335.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SCN5A	NM_001099404.2	MANE Plus Clinical	c.1302C>T	p.Phe434Phe	synonymous	Exon 10 of 28	NP_001092874.1	H9KVD2
	SCN5A	NM_000335.5	MANE Select	c.1302C>T	p.Phe434Phe	synonymous	Exon 10 of 28	NP_000326.2
	SCN5A	NM_198056.3		c.1302C>T	p.Phe434Phe	synonymous	Exon 10 of 28	NP_932173.1	Q14524-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SCN5A	ENST00000413689.6	TSL:5 MANE Plus Clinical	c.1302C>T	p.Phe434Phe	synonymous	Exon 10 of 28	ENSP00000410257.1	H9KVD2
	SCN5A	ENST00000423572.7	TSL:1 MANE Select	c.1302C>T	p.Phe434Phe	synonymous	Exon 10 of 28	ENSP00000398266.2	Q14524-2
	SCN5A	ENST00000333535.9	TSL:1	c.1302C>T	p.Phe434Phe	synonymous	Exon 10 of 28	ENSP00000328968.4	Q14524-1

Frequencies

GnomAD3 genomes AF: 0.0124 AC: 1892 AN: 152174 Hom.: 39 Cov.: 32

Gnomad AFR AF: 0.0434

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00471

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: 0.0000882

Gnomad OTH AF: 0.00765

GnomAD2 exomes AF: 0.00318 AC: 790 AN: 248330 AF XY: 0.00247

Gnomad AFR exome AF: 0.0441

Gnomad AMR exome AF: 0.00250

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000533

Gnomad OTH exome AF: 0.00265

GnomAD4 exome AF: 0.00129 AC: 1885 AN: 1459930 Hom.: 45 Cov.: 31 AF XY: 0.00109 AC XY: 790 AN XY: 726004

African (AFR) AF: 0.0469 AC: 1567 AN: 33398

American (AMR) AF: 0.00273 AC: 122 AN: 44608

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26070

East Asian (EAS) AF: 0.00 AC: 0 AN: 39670

South Asian (SAS) AF: 0.0000465 AC: 4 AN: 86074

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53364

Middle Eastern (MID) AF: 0.000868 AC: 5 AN: 5760

European-Non Finnish (NFE) AF: 0.0000522 AC: 58 AN: 1110682

Other (OTH) AF: 0.00214 AC: 129 AN: 60304

GnomAD4 genome AF: 0.0125 AC: 1897 AN: 152292 Hom.: 39 Cov.: 32 AF XY: 0.0118 AC XY: 878 AN XY: 74464

African (AFR) AF: 0.0434 AC: 1804 AN: 41566

American (AMR) AF: 0.00464 AC: 71 AN: 15294

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5176

South Asian (SAS) AF: 0.00 AC: 0 AN: 4824

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10618

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.0000882 AC: 6 AN: 68028

Other (OTH) AF: 0.00757 AC: 16 AN: 2114

Alfa AF: 0.0122 Hom.: 38

Bravo AF: 0.0146

Asia WGS AF: 0.00289 AC: 10 AN: 3478

EpiCase AF: 0.000164

EpiControl AF: 0.000237

ClinVar

ClinVar submissions

Significance: Benign/Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	5	not provided (5)
-	-	3	not specified (3)
-	-	1	Brugada syndrome 1 (1)
-	-	1	Cardiac arrhythmia (1)
-	-	1	Cardiomyopathy (1)
-	-	1	Cardiovascular phenotype (1)
-	-	1	Congenital long QT syndrome (1)
-	-	1	Dilated cardiomyopathy 1E (1)
-	-	1	Long QT syndrome 3 (1)
-	-	1	Progressive familial heart block, type 1A (1)
-	-	1	Sick sinus syndrome 1 (1)
-	-	1	Ventricular fibrillation, paroxysmal familial, type 1 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.41
CADD	Benign	8.7
DANN	Benign	0.83
PhyloP100		1.4
Mutation Taster		=99/1	polymorphism

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

Other links and lift over

dbSNP: rs41313699; hg19: chr3-38647478;