ClinVar Miner

Submissions for variant NM_000528.4(MAN2B1):c.2389C>T (p.Arg797Cys)

gnomAD frequency: 0.00001  dbSNP: rs772742355
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Total submissions: 4
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Illumina Laboratory Services, Illumina RCV001128270 SCV001287690 uncertain significance Deficiency of alpha-mannosidase 2018-01-13 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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease.
Invitae RCV001128270 SCV001420476 uncertain significance Deficiency of alpha-mannosidase 2021-09-01 criteria provided, single submitter clinical testing This sequence change replaces arginine with cysteine at codon 797 of the MAN2B1 protein (p.Arg797Cys). The arginine residue is highly conserved and there is a large physicochemical difference between arginine and cysteine. This variant is present in population databases (rs772742355, ExAC 0.003%). This variant has not been reported in the literature in individuals affected with MAN2B1-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance.
Genome-Nilou Lab RCV001128270 SCV002027038 uncertain significance Deficiency of alpha-mannosidase 2021-09-05 criteria provided, single submitter clinical testing
Natera, Inc. RCV001128270 SCV002086905 uncertain significance Deficiency of alpha-mannosidase 2020-07-16 no assertion criteria provided clinical testing

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