ClinVar Miner

Submissions for variant NM_000530.8(MPZ):c.364A>G (p.Asn122Asp)

dbSNP: rs1670263376
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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 RCV001313103 SCV001503581 uncertain significance Charcot-Marie-Tooth disease, type I 2022-03-15 criteria provided, single submitter clinical testing This sequence change replaces asparagine, which is neutral and polar, with aspartic acid, which is acidic and polar, at codon 122 of the MPZ protein (p.Asn122Asp). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individuals with Charcot-Marie-Tooth disease (PMID: 33179255). ClinVar contains an entry for this variant (Variation ID: 1014376). 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"). This variant disrupts the p.Asn122 amino acid residue in MPZ. Other variant(s) that disrupt this residue have been observed in individuals with MPZ-related conditions (PMID: 8844219), which suggests that this may be a clinically significant amino acid residue. 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.
Athena Diagnostics RCV004998810 SCV005622403 likely pathogenic not provided 2024-11-15 criteria provided, single submitter clinical testing This variant has not been reported in large, multi-ethnic general populations. (http://gnomad.broadinstitute.org) This variant has been identified in at least one individual with clinical features associated with this gene. Polyphen and MutationTaster yielded discordant predictions regarding whether this amino acid change is damaging to the protein. The variant is located in a region that is considered important for protein function and/or structure.

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