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Gene MAP2K1
Variant Q56P
Impact List missense
Protein Effect gain of function
Gene Variant Descriptions MAP2K1 Q56P does not lie within any known functional domains of the Map2k1 protein (UniProt.org). Q56P confers a gain of function to the Map2k1 protein as indicated by increased kinase activity and the ability to transform cultured cells (PMID: 7651428, PMID: 22327936, PMID: 25351745) and increased proliferation in a competition assay (PMID: 36442478), and demonstrates resistance to some Mek and Braf inhibitors (PMID: 29753091).
Associated Drug Resistance Y
Category Variants Paths

MAP2K1 mutant MAP2K1 act mut MAP2K1 Q56P

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Transcript NM_002755.4
gDNA chr15:g.66435113A>C
cDNA c.167A>C
Protein p.Q56P
Source Database RefSeq
Genome Build GRCh38/hg38
Transcript gDNA cDNA Protein Source Database Genome Build
NM_002755.3 chr15:g.66435113A>C c.167A>C p.Q56P RefSeq GRCh38/hg38
NM_002755 chr15:g.66435113A>C c.167A>C p.Q56P RefSeq GRCh38/hg38
XM_017022411.2 chr15:g.66435113A>C c.167A>C p.Q56P RefSeq GRCh38/hg38
XM_017022411.3 chr15:g.66435113A>C c.167A>C p.Q56P RefSeq GRCh38/hg38
XM_017022411 chr15:g.66435113A>C c.167A>C p.Q56P RefSeq GRCh38/hg38
NM_002755.4 chr15:g.66435113A>C c.167A>C p.Q56P RefSeq GRCh38/hg38

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Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
MAP2K1 Q56P lung adenocarcinoma sensitive Trametinib Preclinical Actionable In a preclinical study, a lung adenocarcinoma cell line harboring MAP2K1 Q56P demonstrated sensitivity to Mekinist (trametinib), resulting in decreased cell viability (PMID: 26582713). 26582713
MAP2K1 Q56P stomach cancer sensitive Trametinib Preclinical Actionable In a preclinical study, a gastric cancer cell line harboring MAP2K1 Q56P demonstrated sensitivity to Mekinist (trametinib), resulting in decreased cell viability (PMID: 26582713). 26582713
MAP2K1 Q56P Advanced Solid Tumor sensitive Trametinib Preclinical - Biochemical Actionable In a preclinical study, Mekinist (trametinib) inhibited Erk phosphorylation in transformed cells expressing MAP2K1 Q56P in culture (PMID: 32641410). 32641410
MAP2K1 Q56P Advanced Solid Tumor sensitive Trametinib Preclinical - Cell culture Actionable In a preclinical study, Mekinist (trametinib) inhibited viability of a transformed cell line expressing MAP2K1 Q56P in culture (PMID: 36442478). 36442478
MAP2K1 Q56P Advanced Solid Tumor resistant AZD8330 Preclinical - Cell culture Actionable In a preclinical study, Map2k1 Q56P displayed resistance to the Mek inhibitor, AZD8330, as demonstrated by constitutive activation of Map2k1 in transformed human kidney cells (PMID: 29753091). 29753091
MAP2K1 Q56P lung adenocarcinoma sensitive PD-0325901 Preclinical Actionable In a preclinical study, a lung adenocarcinoma cell line harboring MAP2K1 Q56P demonstrated sensitivity to PD-0325901, resulting in decreased cell viability (PMID: 26582713). 26582713
MAP2K1 Q56P lung adenocarcinoma sensitive Refametinib Preclinical Actionable In a preclinical study, a lung adenocarcinoma cell line harboring MAP2K1 Q56P demonstrated sensitivity to Refametinib (BAY86-9766), resulting in decreased cell viability (PMID: 26582713). 26582713
MAP2K1 Q56P Advanced Solid Tumor resistant Regorafenib Preclinical - Cell culture Actionable In a preclinical study, Map2k1 Q56P displayed resistance to Stivarga (regorafenib; BAY 73-4506), as demonstrated by constitutive activation of Map2k1 in transformed human kidney cells (PMID: 29753091). 29753091
MAP2K1 Q56P lung adenocarcinoma sensitive Selumetinib Preclinical Actionable In a preclinical study, a lung adenocarcinoma cell line harboring MAP2K1 Q56P demonstrated sensitivity to Selumetinib (AZD6244), resulting in decreased cell viability (PMID: 26582713). 26582713
MAP2K1 Q56P stomach cancer sensitive Selumetinib Preclinical - Cell culture Actionable In a preclinical study, Koselugo (selumetinib) inhibited growth of a gastric cancer cell line that requires MAP2K1 Q56P and inhibited phosphorylation of ERK in these cells (PMID: 22327936). 22327936
MAP2K1 Q56P Advanced Solid Tumor sensitive Selumetinib Preclinical - Cell culture Actionable In a preclinical study, Koselugo (selumetinib) inhibited colony formation of transformed cells expressing MAP2K1 Q56P in culture (PMID: 25351745). 25351745
MAP2K1 Q56P Advanced Solid Tumor sensitive Selumetinib Preclinical - Cell culture Actionable In a preclinical study, Map2k1 Q56P displayed sensitivity to the Mek inhibitor, Selumetinib (AZD6244), as demonstrated by reversal of active Map2k1 in transformed human kidney cells (PMID: 29753091). 29753091
MAP2K1 Q56P Erdheim-Chester disease predicted - sensitive Cobimetinib Case Reports/Case Series Actionable In a clinical case study, a patient with refractory Erdheim-Chester disease harboring a MAP2K1 Q56P mutation had a reduction of lymphatic infiltrates to background within a month of receiving Cotellic (cobimetinib) therapy (PMID: 26566875). 26566875
MAP2K1 Q56P Erdheim-Chester disease predicted - sensitive Cobimetinib Case Reports/Case Series Actionable In a Phase II trial, treatment with Cotellic (cobimetinib) in patients with histiocytic neoplasms resulted in a PET overall response rate of 89% (16/18), with complete response in 72% (13/18) and partial response in 17% (3/18), and stable disease in 6% (1/18) of patients, including a complete response in a patient with Erdheim-Chester disease harboring MAP2K1 Q56P (PMID: 30867592; NCT01953926). 30867592
MAP2K1 Q56P Advanced Solid Tumor sensitive PLX4720 Preclinical - Cell culture Actionable In a preclinical study, Map2k1 Q56P displayed sensitivity to the Braf inhibitor, PLX4720, as demonstrated by reversal of active Map2k1 in transformed human kidney cells (PMID: 29753091). 29753091
MAP2K1 Q56P Advanced Solid Tumor resistant GDC0879 Preclinical - Cell culture Actionable In a preclinical study, Map2k1 Q56P displayed resistance to the Braf inhibitor, GDC-0879, as demonstrated by constitutive activation of Map2k1 in transformed human kidney cells (PMID: 29753091). 29753091
MAP2K1 Q56P Advanced Solid Tumor resistant PD98059 Preclinical - Cell culture Actionable In a preclinical study, Map2k1 Q56P displayed resistance to the Mek inhibitor, PD98059, as demonstrated by constitutive activation of Map2k1 in transformed human kidney cells (PMID: 29753091). 29753091
MAP2K1 Q56P lung cancer predicted - sensitive LY3214996 Preclinical - Cell culture Actionable In a preclinical study, a lung cancer cell line harboring MAP2K1 Q56P was sensitive to treatment with LY3214996 in culture, demonstrating decreased cell proliferation (PMID: 31744895). 31744895