NM_004004.6(GJB2):c.79G>A (p.Val27Ile) AND Autosomal recessive nonsyndromic hearing loss 1A

Germline classification:: Benign (5 submissions)
Last evaluated:: Jul 1, 2021
Review status:: 2 stars out of maximum of 4 stars
criteria provided, multiple submitters, no conflicts

Somatic classification of clinical impact:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Somatic classification of oncogenicity:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Record status:: current
Accession:: RCV000029942.16

Allele description [Variation Report for NM_004004.6(GJB2):c.79G>A (p.Val27Ile)]

NM_004004.6(GJB2):c.79G>A (p.Val27Ile)

Gene:

GJB2:gap junction protein beta 2 [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

13q12.11

Genomic location:

Preferred name:

NM_004004.6(GJB2):c.79G>A (p.Val27Ile)

HGVS:

NC_000013.11:g.20189503C>T
NG_008358.1:g.8473G>A
NM_004004.6:c.79G>AMANE SELECT
NP_003995.2:p.Val27Ile
NP_003995.2:p.Val27Ile
LRG_1350t1:c.79G>A
LRG_1350:g.8473G>A
LRG_1350p1:p.Val27Ile
NC_000013.10:g.20763642C>T
NM_004004.5:c.79G>A
P29033:p.Val27Ile
c.79G>A

Protein change:

V27I

Links:

UniProtKB: P29033#VAR_002137; dbSNP: rs2274084

NCBI 1000 Genomes Browser:

rs2274084

Molecular consequence:

NM_004004.6:c.79G>A - missense variant - [Sequence Ontology: SO:0001583]

Functional consequence:

functionally_normal [Sequence Ontology: SO:0002219]

Observations:

Condition(s)

Name:: Autosomal recessive nonsyndromic hearing loss 1A (DFNB1A)
Synonyms:: Deafness nonsyndromic, Connexin 26 linked; Deafness, autosomal recessive 1A; DFNB 1 Nonsyndromic Hearing Loss and Deafness; See all synonyms [MedGen]
Identifiers:: MONDO: MONDO:0009076; MedGen: C2673759; Orphanet: 90636; OMIM: 220290

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000052597	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	no assertion criteria provided	Benign (Mar 31, 2015)	germline	clinical testing
SCV000383045	Illumina Laboratory Services, Illumina	criteria provided, single submitter (ICSL Variant Classification Criteria 13 December 2019)	Benign (Mar 6, 2018)	germline	clinical testing	Citation Link,
SCV000599728	Genomic Diagnostic Laboratory, Division of Genomic Diagnostics, Children's Hospital of Philadelphia	criteria provided, single submitter (DGD Variant Analysis Guidelines)	Benign (May 9, 2017)	germline	clinical testing	Citation Link,
SCV001453360	Natera, Inc.	no assertion criteria provided	Benign (Sep 16, 2020)	germline	clinical testing
SCV001750053	Pars Genome Lab	criteria provided, single submitter (ACMG Guidelines, 2015)	Benign (Jul 1, 2021)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]

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Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	yes	22	not provided	not provided	not provided	not provided	clinical testing
not provided	germline	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing
not provided	germline	no	not provided	not provided	not provided	not provided	not provided	clinical testing

Citations

PubMed

Standards and guidelines for the interpretation of sequence variants: a joint consensus recommendation of the American College of Medical Genetics and Genomics and the Association for Molecular Pathology.

Richards S, Aziz N, Bale S, Bick D, Das S, Gastier-Foster J, Grody WW, Hegde M, Lyon E, Spector E, Voelkerding K, Rehm HL; ACMG Laboratory Quality Assurance Committee..

Genet Med. 2015 May;17(5):405-24. doi: 10.1038/gim.2015.30. Epub 2015 Mar 5.

PubMed [citation]

PMID:: 25741868
PMCID:: PMC4544753

Details of each submission

From Women's Health and Genetics/Laboratory Corporation of America, LabCorp, SCV000052597.2

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	not provided

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Illumina Laboratory Services, Illumina, SCV000383045.3

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	not provided

Description

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Genomic Diagnostic Laboratory, Division of Genomic Diagnostics, Children's Hospital of Philadelphia, SCV000599728.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	22	not provided	not provided	clinical testing	not provided

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	yes	not provided	not provided	not provided		22	not provided	not provided	not provided

From Natera, Inc., SCV001453360.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	not provided

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Pars Genome Lab, SCV001750053.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (1)

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	no	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: Oct 26, 2024

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