11-118137097-G-T

Position:

• chr11-118137097-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_174934.4(SCN4B):​c.617C>A​(p.Ser206*) variant causes a stop gained change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SCN4B NM_174934.4 stop_gained
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 8.88

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 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SCN4B	NM_174934.4	c.617C>A	p.Ser206*	stop_gained	5/5	ENST00000324727.9	NP_777594.1
SCN4B	NM_001142349.2	c.287C>A	p.Ser96*	stop_gained	4/4		NP_001135821.1
SCN4B	NM_001142348.2	c.215C>A	p.Ser72*	stop_gained	3/3		NP_001135820.1
SCN4B	NR_024527.2	n.606C>A		non_coding_transcript_exon_variant	4/4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SCN4B	ENST00000324727.9	c.617C>A	p.Ser206*	stop_gained	5/5	1	NM_174934.4	ENSP00000322460.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.61	D
BayesDel_noAF	Pathogenic	0.63
CADD	Pathogenic	38
DANN	Uncertain	0.99
Eigen	Pathogenic	0.75
Eigen_PC	Uncertain	0.57
FATHMM_MKL	Pathogenic	0.98	D
Vest4		0.81
GERP RS		4.5

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

LitVar

Other links and lift over

dbSNP: rs140348243; hg19: chr11-118007812;