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| Gene | MLH1 |
| Variant | R659Q |
| Impact List | missense |
| Protein Effect | no effect |
| Gene Variant Descriptions | MLH1 R659Q lies within the C-terminal dimerization domain of the Mlh1 protein (PMID: 22753075). R659Q is predicted to be non-pathogenic based on in silico analyses of the Mlh1 protein and has no effect on mismatch repair activity (MMR) in-vitro (PMID: 22753075, PMID: 21120944) and has subcellular localization similar to wild-type (PMID: 21120944). |
| Associated Drug Resistance | |
| Category Variants Paths |
MLH1 mutant MLH1 R659Q |
| Transcript | NM_000249.4 |
| gDNA | chr3:g.37048596G>A |
| cDNA | c.1976G>A |
| Protein | p.R659Q |
| Source Database | RefSeq |
| Genome Build | GRCh38/hg38 |
| Transcript | gDNA | cDNA | Protein | Source Database | Genome Build |
|---|---|---|---|---|---|
| NM_000249.3 | chr3:g.37048596G>A | c.1976G>A | p.R659Q | RefSeq | GRCh38/hg38 |
| NM_000249 | chr3:g.37048596G>A | c.1976G>A | p.R659Q | RefSeq | GRCh38/hg38 |
| NM_000249.4 | chr3:g.37048596G>A | c.1976G>A | p.R659Q | RefSeq | GRCh38/hg38 |
| Molecular Profile | Indication/Tumor Type | Response Type | Therapy Name | Approval Status | Evidence Type | Efficacy Evidence | References |
|---|---|---|---|---|---|---|---|
| MLH1 mutant | endometrial carcinoma | not applicable | N/A | Guideline | Risk Factor | Germline mutations in MLH1 result in Lynch syndrome, which is associated with increased risk of developing endometrial carcinoma (NCCN.org). | detail... |
| MLH1 mutant | small intestine adenocarcinoma | not applicable | N/A | Guideline | Risk Factor | Lynch syndrome results from germline mutations in DNA mismatch repair genes including MLH1, MSH2, MSH6, and PMS2, and is associated with increased risk of developing small bowel adenocarcinoma (NCCN.org). | detail... |
| MLH1 mutant | colon cancer | not applicable | N/A | Guideline | Risk Factor | Lynch syndrome results from germline mutations in DNA mismatch repair genes including MLH1, MSH2, MSH6, and PMS2, and is associated with increased risk of developing colon cancer (NCCN.org). | detail... |
| MLH1 mutant | pancreatic cancer | not applicable | N/A | Guideline | Risk Factor | Germline mutations in MLH1 result in Lynch syndrome, which is associated with increased risk of developing pancreatic cancer (NCCN.org). | detail... |
| MLH1 mutant | ovarian cancer | not applicable | N/A | Guideline | Risk Factor | Germline mutations in MLH1 result in Lynch syndrome, which is associated with increased risk of ovarian cancer (NCCN.org). | detail... |
| MLH1 mutant | adrenocortical carcinoma | not applicable | N/A | Guideline | Risk Factor | Lynch syndrome results from germline mutations in DNA mismatch repair genes including MLH1, MSH2, MSH6, and PMS2, and is associated with increased risk of developing adrenocortical carcinoma (NCCN.org). | detail... |
| MLH1 mutant | rectum cancer | not applicable | N/A | Guideline | Risk Factor | Lynch syndrome results from germline mutations in DNA mismatch repair genes including MLH1, MSH2, MSH6, and PMS2, and is associated with increased risk of developing colorectal cancer (NCCN.org). | detail... |
| MLH1 mutant | stomach cancer | not applicable | N/A | Guideline | Risk Factor | Germline mutations in MLH1 result in Lynch syndrome, which is associated with increased risk of early onset of gastric cancer (NCCN.org). | detail... |