3-38620901-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_StrongBP6_Very_Strong

The NM_001099404.2(SCN5A):c.553G>A(p.Ala185Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000204 in 1,612,930 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A185V) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00045 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00018 ( 1 hom. )

Consequence

SCN5A
NM_001099404.2 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:3O:1

Conservation

PhyloP100: 1.47

Publications

12 publications found

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 Gene-Disease associations (from GenCC):

Brugada syndrome
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
Brugada syndrome 1
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Laboratory for Molecular Medicine, G2P, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
dilated cardiomyopathy
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
dilated cardiomyopathy 1E
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
familial long QT syndrome
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
long QT syndrome 3
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P
sick sinus syndrome 1
Inheritance: AD, AR Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae)
progressive familial heart block, type 1A
Inheritance: SD, AD Classification: STRONG, MODERATE Submitted by: Ambry Genetics, Genomics England PanelApp
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
short QT syndrome
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

SCN5A links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -12 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.013079286).

BP6

Variant 3-38620901-C-T is Benign according to our data. Variant chr3-38620901-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 67996.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001099404.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
SCN5A	NM_001099404.2	MANE Plus Clinical	c.553G>A	p.Ala185Thr	missense	Exon 5 of 28	NP_001092874.1
SCN5A	NM_000335.5	MANE Select	c.553G>A	p.Ala185Thr	missense	Exon 5 of 28	NP_000326.2
SCN5A	NM_198056.3		c.553G>A	p.Ala185Thr	missense	Exon 5 of 28	NP_932173.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
SCN5A	ENST00000413689.6	TSL:5 MANE Plus Clinical	c.553G>A	p.Ala185Thr	missense	Exon 5 of 28	ENSP00000410257.1
SCN5A	ENST00000423572.7	TSL:1 MANE Select	c.553G>A	p.Ala185Thr	missense	Exon 5 of 28	ENSP00000398266.2
SCN5A	ENST00000333535.9	TSL:1	c.553G>A	p.Ala185Thr	missense	Exon 5 of 28	ENSP00000328968.4

Frequencies

GnomAD3 genomes

AF:

0.000447

AC:

AN:

152208

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00603

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000397

AC:

AN:

247012

AF XY:

0.000395

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 FIN exome

AF:

0.00429

Gnomad NFE exome

AF:

0.0000447

Gnomad OTH exome

AF:

0.000166

GnomAD4 exome

AF:

0.000179

AC:

261

AN:

1460604

Hom.:

Cov.:

AF XY:

0.000184

AC XY:

134

AN XY:

726478

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33466

American (AMR)

AF:

0.00

AC:

AN:

44574

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26112

East Asian (EAS)

AF:

0.00

AC:

AN:

39664

South Asian (SAS)

AF:

0.0000116

AC:

AN:

85948

European-Finnish (FIN)

AF:

0.00457

AC:

244

AN:

53340

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000117

AC:

AN:

1111390

Other (OTH)

AF:

0.0000497

AC:

AN:

60342

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.472

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000446

AC:

AN:

152326

Hom.:

Cov.:

AF XY:

0.000765

AC XY:

AN XY:

74492

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41576

American (AMR)

AF:

0.00

AC:

AN:

15308

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5172

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00603

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000588

AC:

AN:

68028

Other (OTH)

AF:

0.00

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.493

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000332

Hom.:

Bravo

AF:

0.0000151

ExAC

AF:

0.000298

AC:

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:3Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Brugada syndrome 1

Benign:1

Aug 22, 2023

Mendelics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

not provided

Benign:1

Oct 23, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Cardiac arrhythmia

Benign:1

Dec 03, 2018

Color Diagnostics, LLC DBA Color Health

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Congenital long QT syndrome

Other:1

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

Significance:not provided

Review Status:no classification provided

Collection Method:literature only

This variant has been reported as associated with Long QT syndrome in the following publications (PMID:15176425). 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 v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.086

CardioboostArm

Benign

0.00095

CardioboostCm

Benign

0.018

BayesDel_addAF

Pathogenic

0.24

BayesDel_noAF

Pathogenic

0.22

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.67

Eigen

Benign

-0.22

Eigen_PC

Benign

-0.25

FATHMM_MKL

Benign

0.094

LIST_S2

Uncertain

0.86

M_CAP

Pathogenic

0.35

MetaRNN

Benign

0.013

MetaSVM

Uncertain

0.41

MutationAssessor

Benign

0.0

PhyloP100

1.5

PrimateAI

Uncertain

0.51

PROVEAN

Benign

-0.60

REVEL

Uncertain

0.53

Sift

Benign

0.10

Sift4G

Benign

0.081

Polyphen

0.90

Vest4

0.81

MVP

0.97

MPC

0.81

ClinPred

0.13

GERP RS

4.1

Varity_R

0.13

gMVP

0.79

Mutation Taster

=0/100

disease causing

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over