ClinVar Miner

Submissions for variant NM_000528.4(MAN2B1):c.233T>C (p.Leu78Pro)

dbSNP: rs1387086908
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Illumina Laboratory Services, Illumina RCV001128452 SCV001287906 uncertain significance Deficiency of alpha-mannosidase 2018-01-12 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 RCV001128452 SCV002283585 uncertain significance Deficiency of alpha-mannosidase 2021-10-22 criteria provided, single submitter clinical testing This sequence change replaces leucine with proline at codon 78 of the MAN2B1 protein (p.Leu78Pro). The leucine residue is highly conserved and there is a moderate physicochemical difference between leucine and proline. This variant is not present in population databases (ExAC no frequency). This missense change has been observed in individual(s) with alpha-mannosidosis (Invitae). ClinVar contains an entry for this variant (Variation ID: 892434). Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive. 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.

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