ClinVar Miner

Submissions for variant NM_001281492.1(MSH6):c.740_744AGAGA[1] (p.Arg248_Arg249insTer) (rs267608077)

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Total submissions: 9
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
International Society for Gastrointestinal Hereditary Tumours (InSiGHT) RCV000074635 SCV000107835 pathogenic Lynch syndrome 2013-09-05 reviewed by expert panel research Coding sequence variation resulting in a stop codon
Ambry Genetics RCV000129834 SCV000184650 pathogenic Hereditary cancer-predisposing syndrome 2019-02-23 criteria provided, single submitter clinical testing Alterations resulting in premature truncation (e.g.reading frame shift, nonsense);Other strong data supporting pathogenic classification
GeneDx RCV000202120 SCV000211383 pathogenic not provided 2018-01-15 criteria provided, single submitter clinical testing This deletion of 5 nucleotides is denoted MSH6 c.1135_1139delAGAGA at the cDNA level and p.Arg379Ter (R379X) at the protein level. The normal sequence, with the bases that are deleted in braces, is GAGA[AGAGA]TGAG. The deletion creates a nonsense variant, which changes an Arginine to a premature stop codon. This variant is predicted to cause loss of normal protein function through either protein truncation or nonsense-mediated mRNA decay. MSH6 1135_1139delAGAGA has been observed in at least two individuals with a personal history of endometrial cancer and a family history of Lynch syndrome-related cancers (Kets 2006, Frolova 2015). This variant is considered pathogenic.
University of Washington Department of Laboratory Medicine, University of Washington RCV000074635 SCV000266088 pathogenic Lynch syndrome 2015-11-20 criteria provided, single submitter clinical testing
Genetic Services Laboratory,University of Chicago RCV000504011 SCV000595850 pathogenic Hereditary nonpolyposis colorectal cancer type 5 2016-08-19 criteria provided, single submitter clinical testing
Color RCV000129834 SCV000685168 pathogenic Hereditary cancer-predisposing syndrome 2020-01-15 criteria provided, single submitter clinical testing
Invitae RCV000629947 SCV000750903 pathogenic Hereditary nonpolyposis colorectal neoplasms 2019-12-22 criteria provided, single submitter clinical testing This sequence change creates a premature translational stop signal (p.Arg379*) in the MSH6 gene. It is expected to result in an absent or disrupted protein product. This variant is present in population databases (rs777907133, ExAC 0.001%). This variant has been observed in several individuals affected with colorectal polyps, endometrial cancer, and cervical cancer (PMID: 26845104, 17117178, 26681312, 25617771), as well as in individuals undergoing testing for Lynch syndrome (PMID: 28514183). ClinVar contains an entry for this variant (Variation ID: 89174). Loss-of-function variants in MSH6 are known to be pathogenic (PMID: 18269114, 24362816). For these reasons, this variant has been classified as Pathogenic.
Integrated Genetics/Laboratory Corporation of America RCV000074635 SCV000917791 pathogenic Lynch syndrome 2018-12-26 criteria provided, single submitter clinical testing Variant summary: MSH6 c.1135_1139delAGAGA (p.Arg379X) results in a premature termination codon, predicted to cause a truncation of the encoded protein or absence of the protein due to nonsense mediated decay, which are commonly known mechanisms for disease. The variant allele was found at a frequency of 4.1e-06 in 245726 control chromosomes (gnomAD). c.1135_1139delAGAGA has been reported in the literature in individuals affected with Breast cancer, Ovarian cancer, polyups, and cervical cancer (Frolova_2017, Kets_2006, Shirts_2015, Susswein_2015). These data indicate that the variant is likely to be associated with disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Six ClinVar submissions from clinical diagnostic laboratories (evaluation after 2014) cite the variant as pathogenic. Based on the evidence outlined above, the variant was classified as pathogenic.
Mayo Clinic Genetic Testing Laboratories,Mayo Clinic RCV000202120 SCV000257205 likely pathogenic not provided no assertion criteria provided research

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