13-20223005-T-C

Position:

chr13-20223005-T-C

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_001110219.3(GJB6):c.476A>G(p.Asn159Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000377 in 1,614,126 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0021 ( 2 hom., cov: 32)

Exomes 𝑓: 0.00019 ( 2 hom. )

Consequence

GJB6
NM_001110219.3 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:7

Conservation

PhyloP100: 1.56

Variant links:

Genes affected

GJB6 (HGNC:4288): (gap junction protein beta 6) Gap junctions allow the transport of ions and metabolites between the cytoplasm of adjacent cells. They are formed by two hemichannels, made up of six connexin proteins assembled in groups. Each connexin protein has four transmembrane segments, two extracellular loops, a cytoplasmic loop formed between the two inner transmembrane segments, and the N- and C-terminus both being in the cytoplasm. The specificity of the gap junction is determined by which connexin proteins comprise the hemichannel. In the past, connexin protein names were based on their molecular weight, however the new nomenclature uses sequential numbers based on which form (alpha or beta) of the gap junction is present. This gene encodes one of the connexin proteins. Mutations in this gene have been found in some forms of deafness and in some families with hidrotic ectodermal dysplasia. [provided by RefSeq, Jul 2008]

GJB6 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.015368283).

BP6

Variant 13-20223005-T-C is Benign according to our data. Variant chr13-20223005-T-C is described in ClinVar as [Likely_benign]. Clinvar id is 45502.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00213 (324/152258) while in subpopulation AFR AF= 0.00732 (304/41542). AF 95% confidence interval is 0.00664. There are 2 homozygotes in gnomad4. There are 159 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 2 AR,Digenic gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GJB6	NM_001110219.3 linkuse as main transcript	c.476A>G	p.Asn159Ser	missense_variant	5/5	ENST00000647029.1	NP_001103689.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GJB6	ENST00000647029.1 linkuse as main transcript	c.476A>G	p.Asn159Ser	missense_variant	5/5		NM_001110219.3	ENSP00000493834	P1

Frequencies

GnomAD3 genomes

AF:

0.00212

AC:

322

AN:

152140

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00729

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00124

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000545

AC:

137

AN:

251482

Hom.:

AF XY:

0.000441

AC XY:

AN XY:

135910

show subpopulations

Gnomad AFR exome

AF:

0.00720

Gnomad AMR exome

AF:

0.000405

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.000489

GnomAD4 exome

AF:

0.000194

AC:

284

AN:

1461868

Hom.:

Cov.:

AF XY:

0.000177

AC XY:

129

AN XY:

727238

show subpopulations

Gnomad4 AFR exome

AF:

0.00693

Gnomad4 AMR exome

AF:

0.000402

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000450

Gnomad4 OTH exome

AF:

0.000464

GnomAD4 genome

AF:

0.00213

AC:

324

AN:

152258

Hom.:

Cov.:

AF XY:

0.00214

AC XY:

159

AN XY:

74458

show subpopulations

Gnomad4 AFR

AF:

0.00732

Gnomad4 AMR

AF:

0.00124

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000243

Hom.:

Bravo

AF:

0.00243

ESP6500AA

AF:

0.00681

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.000692

AC:

Asia WGS

AF:

0.000866

AC:

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:2

Benign, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Nov 07, 2011	Asn159Ser in exon 3 of GJB6: This variant is not expected to have clinical signi ficance because it has been identified in 0.6% (36/5297) of a broad population ( dbSNP rs35277762). -
Likely benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jun 07, 2016	- -

not provided

Benign:2

Benign, criteria provided, single submitter	clinical testing	GeneDx	Aug 10, 2021	Has not been previously published as pathogenic or benign to our knowledge; In-silico analysis, which includes splice predictors and evolutionary conservation, is inconclusive as to whether the variant alters gene splicing. In the absence of RNA/functional studies, the actual effect of this sequence change is unknown.; Observed in 205/282878 (0.0725%) alleles in large population cohorts (Lek et al., 2016); In-silico analysis, which includes splice predictors and evolutionary conservation, is inconclusive as to whether the variant alters gene splicing. In the absence of RNA/functional studies, the actual effect of this sequence change is unknown. -
Likely benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -

Hidrotic ectodermal dysplasia syndrome

Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Apr 27, 2017

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases was too high to be consistent with this variant causing disease. Therefore, this variant is classified as benign. -

Hidrotic ectodermal dysplasia syndrome;C2673759:Autosomal recessive nonsyndromic hearing loss 1A;C2675235:Autosomal recessive nonsyndromic hearing loss 1B;C2675237:Autosomal dominant nonsyndromic hearing loss 3B

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 06, 2024

- -

GJB6-related disorder

Benign:1

Benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Nov 06, 2019

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.077

BayesDel_addAF

Benign

-0.37

BayesDel_noAF

Benign

-0.31

CADD

Benign

DANN

Benign

0.69

DEOGEN2

Uncertain

0.56

D;D;D;D;D;D;D;D;D;D;D

Eigen

Benign

-0.65

Eigen_PC

Benign

-0.46

FATHMM_MKL

Uncertain

0.89

LIST_S2

Benign

0.72

.;.;.;.;.;.;.;.;.;.;T

M_CAP

Uncertain

0.11

MetaRNN

Benign

0.015

T;T;T;T;T;T;T;T;T;T;T

MetaSVM

Uncertain

-0.22

MutationAssessor

Benign

1.2

L;L;L;L;L;L;L;L;L;L;L

MutationTaster

Benign

0.91

N;N;N;N

PrimateAI

Benign

0.41

PROVEAN

Benign

-0.48

N;.;N;N;.;.;N;.;.;.;.

REVEL

Benign

0.27

Sift

Benign

0.29

T;.;T;T;.;.;T;.;.;.;.

Sift4G

Benign

0.51

T;.;T;T;.;.;T;.;.;.;.

Polyphen

0.0090

B;B;B;B;B;B;B;B;B;B;B

Vest4

0.070

MVP

0.80

MPC

0.083

ClinPred

0.0064

GERP RS

4.0

Varity_R

0.036

gMVP

0.72

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

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