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

gnomAD frequency: 0.02218  dbSNP: rs2274084

Total submissions: 21

Submitter	RCV	SCV	Clinical significance	Condition	Last evaluated	Review status	Method	Comment
Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	RCV000037872	SCV000061534	benign	not specified	2011-06-09	criteria provided, single submitter	clinical testing	Val27Ile in exon 2 of GJB2: This variant is benign based on its high frequency i n the general population (rs2274084) with a homozygous frequency of 12-20% in th e Asian population.
Eurofins Ntd Llc (ga)	RCV000037872	SCV000112278	benign	not specified	2014-11-14	criteria provided, single submitter	clinical testing
Genetic Services Laboratory, University of Chicago	RCV000037872	SCV000193183	benign	not specified	2013-02-08	criteria provided, single submitter	clinical testing
PreventionGenetics, part of Exact Sciences	RCV000037872	SCV000309918	benign	not specified		criteria provided, single submitter	clinical testing
Illumina Laboratory Services, Illumina	RCV000029942	SCV000383045	benign	Autosomal recessive nonsyndromic hearing loss 1A	2018-03-06	criteria provided, single submitter	clinical testing	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.
GeneDx	RCV000037872	SCV000513146	benign	not specified	2015-12-30	criteria provided, single submitter	clinical testing	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease.
Genomic Diagnostic Laboratory, Division of Genomic Diagnostics, Children's Hospital of Philadelphia	RCV000029942	SCV000599728	benign	Autosomal recessive nonsyndromic hearing loss 1A	2017-05-09	criteria provided, single submitter	clinical testing
ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	RCV001510693	SCV000603815	benign	not provided	2023-11-11	criteria provided, single submitter	clinical testing
Athena Diagnostics	RCV000576408	SCV000677264	benign	Autosomal recessive nonsyndromic hearing loss 1A; Autosomal dominant nonsyndromic hearing loss 3A	2017-04-25	criteria provided, single submitter	clinical testing
Illumina Laboratory Services, Illumina	RCV001110665	SCV001268128	benign	Ichthyosis, hystrix-like, with hearing loss	2018-03-06	criteria provided, single submitter	clinical testing	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.
Illumina Laboratory Services, Illumina	RCV001110666	SCV001268129	benign	Autosomal dominant nonsyndromic hearing loss 3A	2018-03-06	criteria provided, single submitter	clinical testing	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.
INGEBI, INGEBI / CONICET	RCV001257145	SCV001433661	benign	Nonsyndromic genetic hearing loss	2020-08-31	criteria provided, single submitter	clinical testing	Based on ACMG/AMP guidelines and Hearing Loss Expert Panel specific criteria: the filtering allele frequency of c.79G>A variant (p.Val27Ile) in GJB2 gene is 27,2% (5547/ 19950 East Asian alleles with 95% CI), 21,7% in Latino population and 4,97% in all ethnic groups from Genome Aggregation Database (http://gnomad.broadinstitute.org; calculated by using inverse allele frequency at https://www.cardiodb.org/allelefrequencyapp/), which meets the allele frequency threshold defined by the ClinGen Hearing Loss Expert Panel for considering very strong evidence against pathogenicity for autosomal recessive hearing loss variants (BA1). The c.79G>A variant has been detected in high frequency in control individuals among different population (PMID: 10633133, 10983956, 15504600, 23503914, 24645897). This variant has been found in cis with pathogenic variants, applying to BP2 (PMID: 24158611). Besides, functional studies showed that p.Val27Ile mutant generated electrical conductance equal to wild type between paired Xenopus laevis oocytes. The same result was obtained when p.Val27Ile mutant was co-injected to hWtCX30, (PMID: 16300957; BS3_Supporting). In summary, this variant meets criteria to be classified as benign for autosomal recessive non-syndromic hearing loss BA1, BP2 and BS3_Supporting.
Labcorp Genetics (formerly Invitae), Labcorp	RCV001510693	SCV001717791	benign	not provided	2024-02-01	criteria provided, single submitter	clinical testing
Pars Genome Lab	RCV001110666	SCV001749993	benign	Autosomal dominant nonsyndromic hearing loss 3A	2021-07-01	criteria provided, single submitter	clinical testing
Pars Genome Lab	RCV000029942	SCV001750053	benign	Autosomal recessive nonsyndromic hearing loss 1A	2021-07-01	criteria provided, single submitter	clinical testing
Breakthrough Genomics, Breakthrough Genomics	RCV001510693	SCV005230752	benign	not provided		criteria provided, single submitter	not provided
Women's Health and Genetics/Laboratory Corporation of America, LabCorp	RCV000029942	SCV000052597	benign	Autosomal recessive nonsyndromic hearing loss 1A	2015-03-31	no assertion criteria provided	clinical testing
Natera, Inc.	RCV000029942	SCV001453360	benign	Autosomal recessive nonsyndromic hearing loss 1A	2020-09-16	no assertion criteria provided	clinical testing
Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	RCV001510693	SCV001743396	likely benign	not provided		no assertion criteria provided	clinical testing
Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	RCV000037872	SCV001959636	benign	not specified		no assertion criteria provided	clinical testing
Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	RCV000037872	SCV001968831	benign	not specified		no assertion criteria provided	clinical testing