ClinVar Miner

Submissions for variant NM_001378454.1(ALMS1):c.8274A>G (p.Gln2758=) (rs181226362)

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Total submissions: 3
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV000553001 SCV000631806 likely benign Alstrom syndrome 2020-11-26 criteria provided, single submitter clinical testing
GeneDx RCV001534589 SCV000732085 likely benign not provided 2021-03-05 criteria provided, single submitter clinical testing
Women's Health and Genetics/Laboratory Corporation of America, LabCorp RCV000612301 SCV000864118 likely benign not specified 2018-11-12 criteria provided, single submitter clinical testing Variant summary: ALMS1 c.8271A>G (alternative name c.8277A>G) alters a non-conserved nucleotide resulting in a synonymous change. 5/5 computational tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 0.00047 in 276572 control chromosomes, predominantly at a frequency of 0.0048 within the African subpopulation in the gnomAD database. The observed variant frequency within African control individuals in the gnomAD database is approximately 2.15 fold of the estimated maximal expected allele frequency for a pathogenic variant in ALMS1 causing Cardiomyopathy phenotype (0.0022), suggesting that the variant is a benign polymorphism found primarily in populations of African origin. To our knowledge, no occurrence of c.8271A>G in individuals affected with Cardiomyopathy and no experimental evidence demonstrating its impact on protein function have been reported. Two clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation, and both of them classified the variant as likely benign. Based on the evidence outlined above, the variant was classified as likely benign.

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