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| Gene | MAP2K1 |
| Variant | H100_I103delinsPL |
| Impact List | indel |
| Protein Effect | gain of function - predicted |
| Gene Variant Descriptions | MAP2K1 H100_I103delinsPL results in a deletion of four amino acids of the Map2k1 protein from amino acids 100 to 103, combined with the insertion of a proline (P) and a leucine (L) at the same site (UniProt.org). H100_I103delinsPL results in proliferation under low serum conditions similar to wild-type Map2k1 in a competition assay but is predicted to lead to a gain of Map2k1 protein function as demonstrated by increased proliferation in a competition assay and increased transformation activity in cultured cells and resistance to Braf inhibitors in the context of BRAF V600E in culture (PMID: 36442478). |
| Associated Drug Resistance | |
| Category Variants Paths |
MAP2K1 mutant MAP2K1 act mut MAP2K1 H100_I103delinsPL |
| Transcript | NM_002755.4 |
| gDNA | chr15:g.66436752_66436763delinsCCTCTT |
| cDNA | c.298_309delinsCCTCTT |
| Protein | p.H100_I103delinsPL |
| Source Database | RefSeq |
| Genome Build | GRCh38/hg38 |
| Transcript | gDNA | cDNA | Protein | Source Database | Genome Build |
|---|---|---|---|---|---|
| XM_017022411.2 | chr15:g.66436752_66436763delinsCCTCTT | c.298_309delinsCCTCTT | p.H100_I103delinsPL | RefSeq | GRCh38/hg38 |
| NM_002755.4 | chr15:g.66436752_66436763delinsCCTCTT | c.298_309delinsCCTCTT | p.H100_I103delinsPL | RefSeq | GRCh38/hg38 |
| XM_017022411.3 | chr15:g.66436752_66436763delinsCCTCTT | c.298_309delinsCCTCTT | p.H100_I103delinsPL | RefSeq | GRCh38/hg38 |
| NM_002755.3 | chr15:g.66436752_66436763delinsCCTCTT | c.298_309delinsCCTCTT | p.H100_I103delinsPL | RefSeq | GRCh38/hg38 |
| Molecular Profile | Indication/Tumor Type | Response Type | Therapy Name | Approval Status | Evidence Type | Efficacy Evidence | References |
|---|---|---|---|---|---|---|---|
| MAP2K1 mutant | Erdheim-Chester disease | sensitive | Trametinib | Guideline | Actionable | Mekinist (trametinib) is included in guidelines as first-line or subsequent-line therapy for patients with Erdheim-Chester disease harboring mutations in the MAPK pathway such as ARAF, NRAS, KRAS, MAP2K1/2, PIK3CA, or with no detectable mutations, or for whom testing is not available (NCCN.org). | detail... |
| MAP2K1 mutant | follicular lymphoma | not applicable | N/A | Guideline | Diagnostic | MAP2K1 mutations aid in the diagnosis of follicular lymphoma (NCCN.org). | detail... |
| MAP2K1 mutant | Erdheim-Chester disease | sensitive | Cobimetinib | Guideline | Actionable | Cotellic (cobimetinib) is included in guidelines as preferred first-line or subsequent-line therapy for patients with Erdheim-Chester disease harboring mutations in the MAPK pathway such as ARAF, NRAS, KRAS, MAP2K1/2, PIK3CA, or with no detectable mutations, or for whom testing is not available (NCCN.org). | detail... |