ClinVar Miner

Submissions for variant NM_000255.4(MMUT):c.1963C>T (p.Arg655Cys)

gnomAD frequency: 0.00007  dbSNP: rs541001298
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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 RCV001160810 SCV001322639 uncertain significance Methylmalonic aciduria due to methylmalonyl-CoA mutase deficiency 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.
Elsea Laboratory, Baylor College of Medicine RCV001250072 SCV001424184 uncertain significance Peroxisome biogenesis disorder 8A (Zellweger); Peroxisome biogenesis disorder 8B 2020-04-01 criteria provided, single submitter clinical testing
Fulgent Genetics, Fulgent Genetics RCV001160810 SCV002815861 uncertain significance Methylmalonic aciduria due to methylmalonyl-CoA mutase deficiency 2022-05-10 criteria provided, single submitter clinical testing
Invitae RCV002557373 SCV003278763 uncertain significance not provided 2022-08-10 criteria provided, single submitter clinical testing This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 655 of the MUT protein (p.Arg655Cys). This variant is present in population databases (rs541001298, gnomAD 0.2%). This variant has not been reported in the literature in individuals affected with MUT-related conditions. ClinVar contains an entry for this variant (Variation ID: 909634). 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: "Benign"; Align-GVGD: "Class C15"). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant is not likely to affect RNA splicing. 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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