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| Gene | CHEK2 |
| Variant | K244R |
| Impact List | missense |
| Protein Effect | no effect - predicted |
| Gene Variant Descriptions | CHEK2 K244R lies within the protein kinase domain of the Chek2 protein (UniProt.org). K244R results in kinase activity similar to wild-type Chek2 in an in vitro assay (PMID: 22114986) and Kap1 phosphorylation and Chek2 autophosphorylation similar to wild-type in CHEK2-null cells in culture (PMID: 37449874), and therefore, is predicted to have no effect on Chek2 protein function. |
| Associated Drug Resistance | |
| Category Variants Paths |
CHEK2 mutant CHEK2 K244R |
| Transcript | NM_007194.4 |
| gDNA | chr22:g.28711970T>C |
| cDNA | c.731A>G |
| Protein | p.K244R |
| Source Database | RefSeq |
| Genome Build | GRCh38/hg38 |
| Transcript | gDNA | cDNA | Protein | Source Database | Genome Build |
|---|---|---|---|---|---|
| NM_007194.4 | chr22:g.28711970T>C | c.731A>G | p.K244R | RefSeq | GRCh38/hg38 |
| XM_011529845 | chr22:g.28694099T>C | c.731A>G | p.K244R | RefSeq | GRCh38/hg38 |
| XM_017028561 | chr22:g.28694099T>C | c.731A>G | p.K244R | RefSeq | GRCh38/hg38 |
| NM_007194.3 | chr22:g.28711970T>C | c.731A>G | p.K244R | RefSeq | GRCh38/hg38 |
| NM_145862 | chr22:g.28711970T>C | c.731A>G | p.K244R | RefSeq | GRCh38/hg38 |
| NM_001257387 | chr22:g.28694099T>C | c.731A>G | p.K244R | RefSeq | GRCh38/hg38 |
| NM_145862.2 | chr22:g.28711970T>C | c.731A>G | p.K244R | RefSeq | GRCh38/hg38 |
| NM_145862.2 | chr22:g.28711970T>C | c.731A>G | p.K244R | RefSeq | GRCh38/hg38 |
| NM_001257387.1 | chr22:g.28694099T>C | c.731A>G | p.K244R | RefSeq | GRCh38/hg38 |
| NM_001257387.2 | chr22:g.28694099T>C | c.731A>G | p.K244R | RefSeq | GRCh38/hg38 |
| XM_017028561.2 | chr22:g.28694099T>C | c.731A>G | p.K244R | RefSeq | GRCh38/hg38 |
| XM_011529845.3 | chr22:g.28694099T>C | c.731A>G | p.K244R | RefSeq | GRCh38/hg38 |
| XM_011529845.2 | chr22:g.28694099T>C | c.731A>G | p.K244R | RefSeq | GRCh38/hg38 |
| NM_007194 | chr22:g.28711970T>C | c.731A>G | p.K244R | RefSeq | GRCh38/hg38 |
| Molecular Profile | Indication/Tumor Type | Response Type | Therapy Name | Approval Status | Evidence Type | Efficacy Evidence | References |
|---|---|---|---|---|---|---|---|
| CHEK2 mutant | prostate cancer | not applicable | N/A | Guideline | Risk Factor | Germline CHEK2 mutations are associated with increased risk of developing prostate cancer (NCCN.org). | detail... |
| CHEK2 mutant | Advanced Solid Tumor | no benefit | Olaparib | Phase II | Actionable | In a Phase II trial, Lynparza (olaparib) treatment did not demonstrate clinical activity in patients with advanced solid tumors harboring ATM (n=13) or CHEK2 (n=14) mutations (Ann Oncol (2023) 34 (suppl_2): S242; NCT03967938). | detail... |
| CHEK2 mutant | breast cancer | no benefit | Olaparib | Case Reports/Case Series | Actionable | In a Phase II trial (TBCRC 048), Lynparza (olaparib) treatment did not result in an objective response in 7 patients with metastatic breast cancer harboring only germline mutations in CHEK2 (PMID: 33119476; NCT03344965). | 33119476 |
| CHEK2 mutant | breast cancer | not applicable | N/A | Guideline | Risk Factor | Germline CHEK2 mutations are associated with increased risk of developing breast cancer (NCCN.org). | detail... |