ClinVar Miner

Submissions for variant NM_000251.3(MSH2):c.1018dup (p.Arg340fs)

dbSNP: rs63750703
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Total submissions: 3
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
International Society for Gastrointestinal Hereditary Tumours (InSiGHT) RCV000076001 SCV000107011 pathogenic Lynch syndrome 2013-09-05 reviewed by expert panel research Coding sequence variant introducing a premature termination codon
Myriad Genetics, Inc. RCV003315596 SCV004019582 pathogenic Lynch syndrome 1 2023-03-03 criteria provided, single submitter clinical testing This variant is considered pathogenic. This variant creates a frameshift predicted to result in premature protein truncation.
Department of Pathology and Laboratory Medicine, Sinai Health System RCV001353842 SCV000592486 pathogenic Carcinoma of colon no assertion criteria provided clinical testing The MSH2 p.Arg340LysfsX4 variant was not identified in the literature nor was it identified in dbSNP, 1000 Genomes Project, NHLBI Exome Sequencing Project (Exome Variant Server), Exome Aggregation Consortium (ExAC) database, COSMIC, “Mismatch Repair Genes Variant Database”, “MMR Gene Unclassified Variants Database”, “Zhejiang Colon Cancer Database”, and UMD. The variant was identified in the Clinvitae database (1X), InSiGHT Colon Cancer Gene Variant Database, the ClinVar database (reviewed by an expert panel and classified as pathogenic), GeneInsight COGR database(1X, classified as pathogenic by a clinical laboratory). The p.Arg340LysfsX4 duplication variant is predicted to cause a frameshift, which alters the protein's amino acid sequence beginning at codon 340 and leads to a premature stop codon 4 codons downstream. This alteration is then predicted to result in a truncated or absent protein and loss of function. Loss of function variants of the MSH2 gene are an established mechanism of disease in Lynch syndrome and this is the type of variant expected to cause the disorder. In summary, based on the above information, this variant meets our laboratory’s criteria to be classified as pathogenic.

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