Total submissions: 24
Submitter | RCV | SCV | Clinical significance | Condition | Last evaluated | Review status | Method | Comment |
---|---|---|---|---|---|---|---|---|
International Society for Gastrointestinal Hereditary Tumours |
RCV000035325 | SCV000108181 | pathogenic | Lynch syndrome | 2013-09-05 | reviewed by expert panel | research | Coding sequence variation resulting in a stop codon (variant causes splicing aberration) |
Laboratory for Molecular Medicine, |
RCV000035325 | SCV000058973 | pathogenic | Lynch syndrome | 2019-04-19 | criteria provided, single submitter | clinical testing | The p.Arg1331X variant in MSH6 has been reported in the heterozygous state in 6 individuals with MSH6-associated cancers (Stormorken 2005, Sjursen 2010, Bonadona 2011, Susswein 2015, LMM data). This variant has also been reported in 2 individuals with clinical features of constitutional mismatch repair syndrome in the compound heterozygous state with another MSH6 variant (Plaschke 2006) or in the homozygous state (Lavoine 2015). In addition, The p.Arg1331X variant has been identified in 1/30646 South Asian chromosomes by gnomAD (http://gnomad.broadinstitute.org). This nonsense variant leads to a premature termination codon at position 1331. This alteration occurs within the terminal 50 bases of the second to last exon and is more likely to escape nonsense mediated decay (NMD) and result in a truncated protein. Studies have demonstrated that the variant results in skipping of exon 9, giving rise to a truncated mRNA leading to drastically reduced MSH6 protein levels, suggesting that this truncated protein is unstable (Plaschke 2006). Moreover, the p.Arg1331X variant has been classified as pathogenic on September 5, 2013 by the ClinGen-approved InSiGHT Expert Panel (ClinVar SCV000108181.2). In summary, this variant meets criteria to be classified as pathogenic for Lynch syndrome in an autosomal dominant manner. ACMG/AMP Criteria applied: PS4_Moderate, PM2, PVS1_Strong, PM3_Supporting. |
Ambry Genetics | RCV000131743 | SCV000186784 | pathogenic | Hereditary cancer-predisposing syndrome | 2021-08-12 | criteria provided, single submitter | clinical testing | The p.R1331* pathogenic mutation (also known as c.3991C>T), located in coding exon 9 of the MSH6 gene, results from a C to T substitution at nucleotide position 3991. This changes the amino acid from an arginine to a stop codon within coding exon 9. This mutation has been reported in multiple individuals with Lynch syndrome (Plaschke J et al. Eur. J. Hum. Genet. 2006 May;14:561-6; Sjursen W et al. J. Med. Genet. 2010 Sep;47:579-85; van Lier MG et al. J. Pathol. 2012 Apr;226:764-74; Lagerstedt-Robinson K et al. Oncol Rep, 2016 Nov;36:2823-2835), including at least one with breast cancer (Roberts ME et al. Genet. Med. 2018 10;20:1167-1174) and one individual with ovarian cancer (Carter NJ et al. Gynecol Oncol, 2018 12;151:481-488). This mutation has also been reported in the homozygous state in an individual with constitutional mismatch repair deficiency who was diagnosed with multiple café-au-lait macules and colorectal cancer at age 11 (Lavoine N et al. Med. Genet. 2015 Nov;52:770-8). In addition to the clinical data presented in the literature, this alteration is expected to result in loss of function by premature protein truncation. As such, this alteration is interpreted as a disease-causing mutation. |
Gene |
RCV000202305 | SCV000211329 | pathogenic | not provided | 2023-05-25 | criteria provided, single submitter | clinical testing | Nonsense variant in the C-terminus predicted to result in protein truncation, as the last 30 amino acids are lost, and also demonstrated to cause skipping of exon 9 in a portion of transcripts (Plaschke et al., 2006); Observed in patients with Lynch-related cancers and tumor studies consistent with pathogenic variants in this gene (Stormorken et al., 2005; Sjursen et al., 2010; van Lier et al., 2012; Goodfellow et al., 2015; Usha et al., 2016; Tian et al., 2019); Observed in the homozygous or compound heterozygous state in individuals with a personal history consistent with constitutional mismatch repair deficiency (CMMR-D) syndrome (Plaschke et al., 2006; Lavoine et al., 2015); Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 24989436, 25525159, 20587412, 18409202, 18709565, 26681312, 26552419, 26318770, 12019211, 22081473, 16034045, 21056691, 21674763, 21376568, 18301448, 27380347, 21642682, 16418736, 27601186, 24362816, 19851887, 30322717, 31447099, 32019277, 31054147, 21120944, 17531815, 33087929, 34445333, 32427313, 30787465, 28888541, 29922827) |
Invitae | RCV000524203 | SCV000283835 | pathogenic | Hereditary nonpolyposis colorectal neoplasms | 2024-01-31 | criteria provided, single submitter | clinical testing | This sequence change creates a premature translational stop signal (p.Arg1331*) in the MSH6 gene. While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 30 amino acid(s) of the MSH6 protein. This variant is present in population databases (rs267608094, gnomAD 0.003%). This premature translational stop signal has been observed in individual(s) with clinical features of Lynch syndrome (PMID: 16034045, 18301448, 20587412, 21056691, 21642682, 27601186). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. ClinVar contains an entry for this variant (Variation ID: 42472). Algorithms developed to predict the effect of variants on protein structure and function are not available or were not evaluated for this variant. Experimental studies have shown that this premature translational stop signal affects MSH6 function (PMID: 16418736). Studies have shown that this premature translational stop signal is associated with inconclusive levels of altered splicing (Invitae). This variant disrupts a region of the MSH6 protein in which other variant(s) (p.Leu1330Valfs*12) have been determined to be pathogenic (PMID: 19851887, 21155762). This suggests that this is a clinically significant region of the protein, and that variants that disrupt it are likely to be disease-causing. For these reasons, this variant has been classified as Pathogenic. |
Counsyl | RCV000410467 | SCV000488239 | pathogenic | Lynch syndrome 5 | 2016-02-02 | criteria provided, single submitter | clinical testing | |
Quest Diagnostics Nichols Institute San Juan Capistrano | RCV000202305 | SCV000601596 | pathogenic | not provided | 2022-02-06 | criteria provided, single submitter | clinical testing | This nonsense variant causes the premature termination of MSH6 protein synthesis. A published experimental study indicated that this variant results in partial skipping of exon 9 (PMID: 16418736). Additionally, this variant has been reported in individuals with breast (PMID: 26681312 (2016)), ovarian (PMID: 30322717 (2018)), endometrial (PMIDs: 16034045 (2005) and 26552419 (2015)), colorectal (PMIDs: 20587412 (2010), 21056691 (2011), 22081473 (2012), 26318770 (2015), and 27601186 (2016)), and other lynch-related cancers whose tumors showed loss of MSH6 expression in the immunohistochemistry staining (PMIDs: 16034045 (2005), 18301448 (2008), 20587412 (2010), and 22081473 (2012)). In addition, this variant has also been reported in a couple of individuals with constitutional mismatch repair syndrome in the compound heterozygous state with another pathogenic MSH6 variant or in the homozygous state (PMIDs: 16418736 (2006) and 26318770 (2015)). Based on the available information, this variant is classified as pathogenic. |
Women's Health and Genetics/Laboratory Corporation of America, |
RCV001824584 | SCV000695906 | pathogenic | Hereditary nonpolyposis colon cancer | 2022-01-26 | criteria provided, single submitter | clinical testing | Variant summary: MSH6 c.3991C>T (p.Arg1331X) 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 245746 control chromosomes (gnomAD). c.3991C>T has been reported in the literature in individuals affected with varying cancer phenotypes including colorectal (Sjursen_2010, Limburg_2011, van Lier_2012, Lavoine_2015), endometrial (Goodfellow_2015), and breast (Susswein_2016), and in individuals with a family history of Lynch syndrome (Plaschke_2006). These data indicate that the variant is very likely to be associated with disease. The variant has, however, also been reported in seemingly healthy individuals, including the father of a compound heterozygote child with Lynch Syndrome, indicating that it may exhibit reduced penetrance (Plaschke_2006). One publication reports experimental evidence indicating that the variant results in exon 9 skipping (Plaschke_2006), and multiple publications report a reduction of IHC staining for MSH6 protein in samples from individuals with this variant. 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. |
Color Diagnostics, |
RCV000131743 | SCV001340973 | pathogenic | Hereditary cancer-predisposing syndrome | 2023-02-21 | criteria provided, single submitter | clinical testing | This variant changes 1 nucleotide in exon 9 of the MSH6 gene, creating a premature translation stop signal. This variant is expected to result in an absent or non-functional protein product. This variant has been reported in individuals affected with colorectal and/or endometrial cancer, Lynch syndrome, and Constitutional mismatch repair-deficiency syndrome (PMID: 16034045, 16418736, 20587412, 21056691, 21674763, 22081473, 26318770, 26552419, 27601186, 29345684). This variant has been identified in 1/245746 chromosomes in the general population by the Genome Aggregation Database (gnomAD). Loss of MSH6 function is a known mechanism of disease (clinicalgenome.org). Based on the available evidence, this variant is classified as Pathogenic. |
Institute of Human Genetics, |
RCV000410467 | SCV001429321 | pathogenic | Lynch syndrome 5 | 2019-02-08 | criteria provided, single submitter | clinical testing | |
Human Genome Sequencing Center Clinical Lab, |
RCV000410467 | SCV001434868 | pathogenic | Lynch syndrome 5 | 2018-10-14 | criteria provided, single submitter | clinical testing | The c.3991C>T (p.Arg1331*) variant in the MSH6 gene is predicted to introduce a premature translation termination codon. This variant has been reported in multiple unrelated individuals with Lynch Syndrome-associated tumors and loss of MSH6 expression through immunohistochemistry staining were identified in the tumors of these individuals (PMID 16034045,18301448, 20587412). This variant has also been reported in two individuals with constitutional mismatch repair syndrome. One the two individuals carry this variant in trans with a likely pathogenic MSH6 variant (p.Arg1076Cys, PMID 16418736) and the other individual was homozygous with this variant (PMID 26318770). This variant is extremely rare in general population databases. Therefore, this c.3991C>T (p.Arg1331*) variant in the MSH6 gene is classified as pathogenic. |
MGZ Medical Genetics Center | RCV000410467 | SCV002580515 | pathogenic | Lynch syndrome 5 | 2021-10-20 | criteria provided, single submitter | clinical testing | |
Institute of Human Genetics, |
RCV000410467 | SCV002757861 | pathogenic | Lynch syndrome 5 | 2022-09-27 | criteria provided, single submitter | clinical testing | |
Fulgent Genetics, |
RCV002490471 | SCV002790837 | pathogenic | Endometrial carcinoma; Lynch syndrome 5; Mismatch repair cancer syndrome 3 | 2022-03-17 | criteria provided, single submitter | clinical testing | |
Myriad Genetics, |
RCV000410467 | SCV004019084 | pathogenic | Lynch syndrome 5 | 2023-03-30 | criteria provided, single submitter | clinical testing | This variant is considered pathogenic. This variant creates a termination codon and is predicted to result in premature protein truncation. Functional studies indicate this variant impacts protein function [PMID:16418736]. |
Institute for Clinical Genetics, |
RCV000202305 | SCV004026435 | pathogenic | not provided | 2023-06-20 | criteria provided, single submitter | clinical testing | |
Human Genetics Bochum, |
RCV000410467 | SCV004042787 | pathogenic | Lynch syndrome 5 | 2023-05-31 | criteria provided, single submitter | clinical testing | ACMG criteria used to clasify this variant:PVS1, PS4_MOD, PM1, PS3_SUP, PM2_SUP |
Preventiongenetics, |
RCV003398595 | SCV004106058 | pathogenic | MSH6-related condition | 2023-04-13 | criteria provided, single submitter | clinical testing | The MSH6 c.3991C>T variant is predicted to result in premature protein termination (p.Arg1331*). This variant has been repeatedly reported in the heterozygous state in individuals with variable cancer phenotypes, including patients with colorectal, endometrial, and breast cancer (see for example Sjursen et al. 2010. PubMed ID: 20587412; Goodfellow et al. 2015. PubMed ID: 26552419; Susswein et al. 2016. PubMed ID: 26681312). This variant has also been reported in the homozygous and compound heterozygous states in patients with constitutional mismatch repair syndrome (see for example Plaschke et al. 2006. PubMed ID: 16418736; Lavoine et al. 2015. PubMed ID: 26318770). This variant is reported in 0.0033% of alleles in individuals of South Asian descent in gnomAD (http://gnomad.broadinstitute.org/variant/2-48033780-C-T). This variant is classified as pathogenic in ClinVar (https://www.ncbi.nlm.nih.gov/clinvar/variation/42472/). Nonsense variants in MSH6 are expected to be pathogenic. Taken together, this variant is interpreted as pathogenic. |
Baylor Genetics | RCV003460548 | SCV004195832 | pathogenic | Endometrial carcinoma | 2023-02-21 | criteria provided, single submitter | clinical testing | |
CHEO Genetics Diagnostic Laboratory, |
RCV003492340 | SCV004239322 | pathogenic | Breast and/or ovarian cancer | 2023-02-06 | criteria provided, single submitter | clinical testing | |
Mayo Clinic Laboratories, |
RCV000202305 | SCV000257292 | likely pathogenic | not provided | no assertion criteria provided | research | ||
Diagnostic Laboratory, |
RCV000202305 | SCV001744264 | pathogenic | not provided | no assertion criteria provided | clinical testing | ||
Joint Genome Diagnostic Labs from Nijmegen and Maastricht, |
RCV000202305 | SCV001952768 | pathogenic | not provided | no assertion criteria provided | clinical testing | ||
Clinical Genetics DNA and cytogenetics Diagnostics Lab, |
RCV000202305 | SCV001969250 | pathogenic | not provided | no assertion criteria provided | clinical testing |