ClinVar Miner

Submissions for variant NM_015506.3(MMACHC):c.640dup (p.Arg214fs)

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Total submissions: 1
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Labcorp Genetics (formerly Invitae), Labcorp RCV003600260 SCV004482645 pathogenic Cobalamin C disease 2023-07-28 criteria provided, single submitter clinical testing For these reasons, this variant has been classified as Pathogenic. This variant disrupts a region of the MMACHC protein in which other variant(s) (p.Tyr222*) have been determined to be pathogenic (PMID: 16311595, 19767224, 30157807). This suggests that this is a clinically significant region of the protein, and that variants that disrupt it are likely to be disease-causing. This variant has not been reported in the literature in individuals affected with MMACHC-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change creates a premature translational stop signal (p.Arg214Profs*31) in the MMACHC gene. While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 69 amino acid(s) of the MMACHC protein.

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