ClinVar Miner

Submissions for variant NM_000535.7(PMS2):c.509A>G (p.His170Arg)

dbSNP: rs1583402418
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV000823076 SCV000963918 uncertain significance Hereditary nonpolyposis colorectal neoplasms 2022-02-18 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. RNA analysis performed to evaluate the impact of this missense change on mRNA splicing indicates it does not significantly alter splicing (Invitae). 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 PMS2 protein function. ClinVar contains an entry for this variant (Variation ID: 664895). This variant has not been reported in the literature in individuals affected with PMS2-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces histidine, which is basic and polar, with arginine, which is basic and polar, at codon 170 of the PMS2 protein (p.His170Arg).
Ambry Genetics RCV002336718 SCV002642456 uncertain significance Hereditary cancer-predisposing syndrome 2021-08-31 criteria provided, single submitter clinical testing The p.H170R variant (also known as c.509A>G), located in coding exon 5 of the PMS2 gene, results from an A to G substitution at nucleotide position 509. The histidine at codon 170 is replaced by arginine, an amino acid with highly similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.

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