chr11-118144057-A-G

Position:

chr11-118144057-A-G

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BS2

The NM_174934.4(SCN4B):c.239T>C(p.Ile80Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000559 in 1,609,412 control chromosomes in the GnomAD database, with no homozygous occurrence. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000055 ( 0 hom. )

Consequence

SCN4B
NM_174934.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.83

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 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

BS2

High AC in GnomAdExome4 at 8 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
SCN4B	NM_174934.4 linkuse as main transcript	c.239T>C	p.Ile80Thr	missense_variant	3/5	ENST00000324727.9	NP_777594.1
SCN4B	NM_001142349.2 linkuse as main transcript	c.-92T>C		5_prime_UTR_variant	2/4		NP_001135821.1
SCN4B	NM_001142348.2 linkuse as main transcript	c.62-2721T>C		intron_variant			NP_001135820.1
SCN4B	NR_024527.2 linkuse as main transcript	n.382T>C		non_coding_transcript_exon_variant	2/4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SCN4B	ENST00000324727.9 linkuse as main transcript	c.239T>C	p.Ile80Thr	missense_variant	3/5	1	NM_174934.4	ENSP00000322460	P1	Q8IWT1-1
SCN4B	ENST00000415030.6 linkuse as main transcript	n.382T>C		non_coding_transcript_exon_variant	2/4	1
SCN4B	ENST00000529878.1 linkuse as main transcript	c.62-2721T>C		intron_variant		4		ENSP00000436343		Q8IWT1-3
SCN4B	ENST00000532138.1 linkuse as main transcript	n.649T>C		non_coding_transcript_exon_variant	2/3	4

Frequencies

GnomAD3 genomes

AF:

0.00000658

AC:

AN:

152074

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:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000239

AC:

AN:

251358

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135858

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000217

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000549

AC:

AN:

1457220

Hom.:

Cov.:

AF XY:

0.00000552

AC XY:

AN XY:

725122

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000447

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000756

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000181

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152192

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74414

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Long QT syndrome 10

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Mar 21, 2016

This sequence change replaces isoleucine with threonine at codon 80 of the SCN4B protein (p.Ile80Thr). The isoleucine residue is moderately conserved and there is a moderate physicochemical difference between isoleucine and threonine. In summary, this variant is a rare missense change that is not predicted to affect protein function. There is no indication that it causes disease, but the available evidence is currently insufficient to prove that conclusively. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated, but these predictions have not been confirmed by published functional studies. This variant is present in population databases (rs546190140, ExAC 0.01%) but has not been reported in the literature in individuals with a SCN4B-related disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.27

BayesDel_addAF

Benign

-0.24

BayesDel_noAF

Benign

-0.29

CADD

Benign

DANN

Benign

0.91

DEOGEN2

Benign

0.22

Eigen

Benign

-0.65

Eigen_PC

Benign

-0.61

FATHMM_MKL

Benign

0.38

LIST_S2

Benign

0.68

M_CAP

Benign

0.014

MetaRNN

Uncertain

0.47

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.4

MutationTaster

Benign

1.0

N;N

PrimateAI

Uncertain

0.62

PROVEAN

Benign

-0.78

REVEL

Benign

0.26

Sift

Benign

0.17

Sift4G

Benign

0.37

Polyphen

0.036

Vest4

0.68

MutPred

0.69

Loss of stability (P = 0.0251);

MVP

0.081

MPC

0.20

ClinPred

0.028

GERP RS

4.8

Varity_R

0.26

gMVP

0.78

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over