ClinVar Miner

Submissions for variant NM_015506.3(MMACHC):c.506T>C (p.Ile169Thr)

dbSNP: rs1643678565
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Labcorp Genetics (formerly Invitae), Labcorp RCV001221525 SCV001393575 uncertain significance Cobalamin C disease 2019-06-05 criteria provided, single submitter clinical testing This sequence change replaces isoleucine with threonine at codon 169 of the MMACHC protein (p.Ile169Thr). The isoleucine residue is moderately conserved and there is a moderate physicochemical difference between isoleucine and threonine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with MMACHC-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The threonine amino acid residue is found in multiple mammalian species, suggesting that this missense change does not adversely affect protein function. These predictions have not been confirmed by published functional studies and their clinical significance is uncertain. 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.
Natera, Inc. RCV001221525 SCV002089544 uncertain significance Cobalamin C disease 2020-04-01 no assertion criteria provided clinical testing

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