ClinVar Miner

Submissions for variant NM_004990.4(MARS1):c.699T>G (p.Ile233Met) (rs201597392)

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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
GeneDx RCV000523299 SCV000618076 uncertain significance not provided 2017-07-17 criteria provided, single submitter clinical testing The I233M variant has not been published as a pathogenic variant, nor has it been reported as a benign variant to our knowledge. The I233M variant is observed in 2/6614 alleles from individuals of Finnish background, in the ExAC dataset (Lek et al., 2016). The I233M variant is a conservative amino acid substitution, which is not likely to impact secondary protein structure as these residues share similar properties. This substitution occurs at a position that is conserved in mammals. In silico analysis is inconsistent in its predictions as to whether or not the variant is damaging to the protein structure/function. In summary, based on the currently available information, it is unclear whether this variant is a pathogenic variant or a rare benign variant.
Invitae RCV000652554 SCV000774424 uncertain significance Interstitial lung and liver disease; Charcot-Marie-Tooth disease, axonal, type 2u 2017-12-11 criteria provided, single submitter clinical testing This sequence change replaces isoleucine with methionine at codon 233 of the MARS protein (p.Ile233Met). The isoleucine residue is moderately conserved and there is a small physicochemical difference between isoleucine and methionine. This variant is present in population databases (rs201597392, ExAC 0.03%). This variant has not been reported in the literature in individuals with MARS-related disease. 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 tolerated, but 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.

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