dbSNP rs758628437: SCN4B:p.Lys199Met (chr11-118137118-T-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_174934.4(SCN4B):c.596A>T(p.Lys199Met) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.000000686 in 1,458,460 control chromosomes in the GnomAD database, with no homozygous occurrence. 1/1 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. K199R) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

SCN4B
NM_174934.4 missense, splice_region

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 5.42

Publications

0 publications found

Variant links:

Genes affected

SCN4B (HGNC:10592): (sodium voltage-gated channel beta subunit 4) The protein encoded by this gene is one of several sodium channel beta subunits. These subunits interact with voltage-gated alpha subunits to change sodium channel kinetics. The encoded transmembrane protein forms interchain disulfide bonds with SCN2A. Defects in this gene are a cause of long QT syndrome type 10 (LQT10). Three protein-coding and one non-coding transcript variant have been found for this gene.[provided by RefSeq, Mar 2009]

SCN4B Gene-Disease associations (from GenCC):

familial atrial fibrillation
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
long QT syndrome 10
Inheritance: Unknown, AD Classification: LIMITED Submitted by: Laboratory for Molecular Medicine, Labcorp Genetics (formerly Invitae)
long QT syndrome
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

SCN4B links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein
SCN4B	NM_174934.4 link	c.596A>T	p.Lys199Met	missense_variant, splice_region_variant	Exon 5 of 5	ENST00000324727.9	NP_777594.1
SCN4B	NM_001142349.2 link	c.266A>T	p.Lys89Met	missense_variant, splice_region_variant	Exon 4 of 4		NP_001135821.1
SCN4B	NM_001142348.2 link	c.194A>T	p.Lys65Met	missense_variant, splice_region_variant	Exon 3 of 3		NP_001135820.1
SCN4B	NR_024527.2 link	n.585A>T		splice_region_variant, non_coding_transcript_exon_variant	Exon 4 of 4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SCN4B	ENST00000324727.9 link	c.596A>T	p.Lys199Met	missense_variant, splice_region_variant	Exon 5 of 5	1	NM_174934.4	ENSP00000322460.4

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000398

AC:

AN:

251298

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.86e-7

AC:

AN:

1458460

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

725746

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33408

American (AMR)

AF:

0.00

AC:

AN:

44714

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26118

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39692

South Asian (SAS)

AF:

0.00

AC:

AN:

86158

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53410

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1108918

Other (OTH)

AF:

0.00

AC:

AN:

60280

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

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

Cov.:

ExAC

AF:

0.00000824

AC:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.59

BayesDel_addAF

Uncertain

0.10

BayesDel_noAF

Uncertain

0.070

CADD

Pathogenic

(source)

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.44

T;.

Eigen

Uncertain

0.39

Eigen_PC

Uncertain

0.34

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.87

D;D

M_CAP

Pathogenic

0.43

MetaRNN

Uncertain

0.56

D;D

MetaSVM

Pathogenic

0.99

MutationAssessor

Uncertain

2.1

M;.

PhyloP100

5.4

PrimateAI

Uncertain

0.59

PROVEAN

Uncertain

-3.3

D;D

REVEL

Uncertain

0.64

Sift

Uncertain

0.0010

D;D

Sift4G

Pathogenic

0.0

D;D

Polyphen

1.0

D;.

Vest4

0.41

MutPred

0.38

Gain of catalytic residue at K199 (P = 2e-04);.;

MVP

0.96

MPC

0.72

ClinPred

0.98

GERP RS

4.5

Varity_R

0.33

gMVP

0.54

Mutation Taster

=37/63

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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over