ClinVar Miner

Submissions for variant NM_000249.4(MLH1):c.983A>C (p.Gln328Pro)

dbSNP: rs2082986773
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV001224160 SCV001396343 uncertain significance Hereditary nonpolyposis colorectal neoplasms 2022-11-29 criteria provided, single submitter clinical testing 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. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt MLH1 protein function. ClinVar contains an entry for this variant (Variation ID: 952113). This variant has not been reported in the literature in individuals affected with MLH1-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces glutamine, which is neutral and polar, with proline, which is neutral and non-polar, at codon 328 of the MLH1 protein (p.Gln328Pro).
Ambry Genetics RCV002379849 SCV002689252 uncertain significance Hereditary cancer-predisposing syndrome 2022-03-21 criteria provided, single submitter clinical testing The p.Q328P variant (also known as c.983A>C), located in coding exon 11 of the MLH1 gene, results from an A to C substitution at nucleotide position 983. The glutamine at codon 328 is replaced by proline, an amino acid with similar properties. This amino acid position is well conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. In addition, this alteration is predicted to be deleterious by MAPP-MMR in silico analyses (Chao EC et al. Hum. Mutat. 2008 Jun;29:852-60). Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.

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