ClinVar Miner

Submissions for variant NM_001008216.2(GALE):c.770A>G (p.Lys257Arg)

gnomAD frequency: 0.00568  dbSNP: rs28940884
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Total submissions: 13
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Genomic Medicine Center of Excellence, King Faisal Specialist Hospital and Research Centre RCV000003864 SCV005438297 uncertain significance UDPglucose-4-epimerase deficiency 2024-12-18 criteria provided, single submitter clinical testing
Mayo Clinic Laboratories, Mayo Clinic RCV000592410 SCV005410423 uncertain significance not provided 2023-07-17 criteria provided, single submitter clinical testing BS1
Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine RCV000609606 SCV004847446 likely benign not specified 2024-02-21 criteria provided, single submitter clinical testing The p.Lys257Arg variant in GALE is classified as likely benign because it has been identified in 1.9% (1474/75008) of African chromosomes, including 24 total homozygotes by gnomAD (http://gnomad.broadinstitute.org). ACMG/AMP Criteria applied: BS1.
CeGaT Center for Human Genetics Tuebingen RCV000592410 SCV004700471 benign not provided 2025-04-01 criteria provided, single submitter clinical testing GALE: BS1, BS2
Greenwood Genetic Center Diagnostic Laboratories, Greenwood Genetic Center RCV000592410 SCV003799128 uncertain significance not provided 2022-10-19 criteria provided, single submitter clinical testing PS3_Supporting, BA1
Women's Health and Genetics/Laboratory Corporation of America, LabCorp RCV000609606 SCV002500159 benign not specified 2022-03-07 criteria provided, single submitter clinical testing Variant summary: GALE c.770A>G (p.Lys257Arg) results in a conservative amino acid change in the encoded protein sequence. Two of three in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 0.0014 in 248990 control chromosomes, predominantly at a frequency of 0.019 within the African or African-American subpopulation in the gnomAD database, including 5 homozygotes. The observed variant frequency within African or African-American control individuals in the gnomAD database is approximately 17 fold of the estimated maximal expected allele frequency for a pathogenic variant in GALE causing UDPglucose-4-Epimerase Deficiency phenotype (0.0011), strongly suggesting that the variant is a benign polymorphism found primarily in populations of African or African-American origin. Four clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation and a majority consensus as benign/likely benign. Based on the evidence outlined above, the variant was classified as benign.
Mendelics RCV000003864 SCV001135217 likely benign UDPglucose-4-epimerase deficiency 2019-05-28 criteria provided, single submitter clinical testing
GeneDx RCV000609606 SCV000730667 likely benign not specified 2018-02-01 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.
Eurofins Ntd Llc (ga) RCV000592410 SCV000700362 other not provided 2017-07-14 criteria provided, single submitter clinical testing
Labcorp Genetics (formerly Invitae), Labcorp RCV000003864 SCV000636278 benign UDPglucose-4-epimerase deficiency 2019-12-22 criteria provided, single submitter clinical testing
PreventionGenetics, part of Exact Sciences RCV004752683 SCV005357664 uncertain significance GALE-related disorder 2024-09-13 no assertion criteria provided clinical testing The GALE c.770A>G variant is predicted to result in the amino acid substitution p.Lys257Arg. This variant has been reported in several peripheral epimerase deficiency galactosemia patients (Maceratesi et al. 1998. PubMed ID: 9538513; Openo et al. 2006. PubMed ID: 16385452). However, none of these patients had a second clearly pathogenic GALE variant, and the reported results of in vitro and in vivo studies of the c.770A>G variant are conflicting (Timson 2005. PubMed ID: 16302980; Wasilenko et al. 2005. PubMed ID: 15639193). The c.770A>G variant has been documented with a minor allele frequency of ~2% in an African population, which is high for a pathogenic variant. Although we suspect that this variant is probably benign, its clinical significance is currently uncertain due to the absence of conclusive functional and genetic evidence.
GeneReviews RCV000003864 SCV000040659 pathogenic UDPglucose-4-epimerase deficiency 2021-02-24 no assertion criteria provided literature only Assoc with asymptomatic peripheral epimerase deficiency galactosemia in African Americans
OMIM RCV000003864 SCV000024029 pathogenic UDPglucose-4-epimerase deficiency 1998-01-01 no assertion criteria provided literature only

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