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Gene KIT
Variant N822K
Impact List missense
Protein Effect gain of function
Gene Variant Descriptions KIT N822K lies within the activation loop in the protein kinase domain of the Kit protein (PMID: 24205792). N822K results in constitutive activation of Kit, increased Erk1/2 and Stat3 phosphorylation, is transforming in culture (PMID: 24205792, PMID: 31484543), leads to mislocalization of Kit to endolysosomes (PMID: 31484543), and has been identified as a secondary mutation associated with imatinib resistance (PMID: 18488160).
Associated Drug Resistance Y
Category Variants Paths

KIT mutant KIT act mut KIT N822K

KIT mutant KIT exon17 KIT N822K

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Transcript NM_000222.3
gDNA chr4:g.54733174T>G
cDNA c.2466T>G
Protein p.N822K
Source Database RefSeq
Genome Build GRCh38/hg38
Transcript gDNA cDNA Protein Source Database Genome Build
NM_000222 chr4:g.54733174T>G c.2466T>G p.N822K RefSeq GRCh38/hg38
XM_005265741.1 chr4:g.54733174T>G c.2466T>G p.N822K RefSeq GRCh38/hg38
NM_000222.3 chr4:g.54733174T>G c.2466T>G p.N822K RefSeq GRCh38/hg38
NM_000222.2 chr4:g.54733174T>G c.2466T>G p.N822K RefSeq GRCh38/hg38
NM_001385290.1 chr4:g.54733174T>G c.2466T>G p.N822K RefSeq GRCh38/hg38
XM_005265741 chr4:g.54733174T>G c.2466T>G p.N822K RefSeq GRCh38/hg38

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Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
KIT W557_K558del KIT N822K Advanced Solid Tumor sensitive Ponatinib Preclinical Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT N822K were sensitive to Iclusig (ponatinib) in an in vitro kinase assay (PMID: 25239608). 25239608
KIT W557_K558del KIT N822K Advanced Solid Tumor resistant Sunitinib Preclinical Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT N822K were resistant to Sutent (sunitinb) in an in vitro kinase assay (PMID: 25239608). 25239608
KIT W557_K558del KIT N822K Advanced Solid Tumor resistant Sunitinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT N822K demonstrated resistance to Sutent (sunitinib) in culture (PMID: 32350132). 32350132
KIT W557_K558del KIT N822K Advanced Solid Tumor resistant Imatinib Preclinical Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT N822K were resistant to Gleevec (imatinib) in an in vitro kinase assay (PMID: 25239608). 25239608
KIT W557_K558del KIT N822K Advanced Solid Tumor resistant Imatinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT N822K demonstrated resistance to Gleevec (imatinib) in culture (PMID: 32350132). 32350132
KIT W557_K558del KIT N822K Advanced Solid Tumor conflicting Regorafenib Preclinical Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT N822K were resistant to Stivarga (regorafenib) in an in vitro kinase assay (PMID: 25239608). 25239608
KIT W557_K558del KIT N822K Advanced Solid Tumor conflicting Regorafenib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT N822K was sensitive to treatment with Stivarga (regorafenib), demonstrating decreased cell viability in culture (PMID: 32350132). 32350132
KIT W557_K558del KIT N822K Advanced Solid Tumor sensitive AZD3229 Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT N822K demonstrated sensitivity to AZD3229 in culture, resulting in reduced cell viability (PMID: 32350132). 32350132
KIT W557_K558del KIT N822K Advanced Solid Tumor sensitive Ripretinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT N822K demonstrated sensitivity to Qinlock (ripretinib) in culture, resulting in reduced cell viability (PMID: 32350132). 32350132
KIT W557_K558del KIT N822K Advanced Solid Tumor sensitive Avapritinib Preclinical - Cell culture Actionable In a preclinical study, Ayvakit (avapritinib) treatment resulted in decreased viability of transformed cells expressing KIT W557_K558del and KIT N822K in culture, but was less effective compared to other treatments (PMID: 32350132). 32350132
KIT W557_K558del KIT N822K gastrointestinal stromal tumor predicted - resistant Binimetinib + Imatinib Case Reports/Case Series Actionable In a Phase II trial, KIT N822K was identified as a secondary resistance mutation in a patient with a gastrointestinal stromal tumor harboring a primary KIT W557_K558del mutation who developed resistance to Gleevec (imatinib) and Mektovi (binimetinib) (PMID: 35041493; NCT01991379). 35041493
KIT V559D KIT N822K Advanced Solid Tumor no benefit Sunitinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells co-expressing KIT N822K and KIT V559D were insensitive to Sutent (sunitinib) in culture (PMID: 24205792). 24205792
KIT V559D KIT N822K Advanced Solid Tumor sensitive Flumatinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells co-expressing KIT N822K and KIT V559D were sensitive to Flumatinib in culture, demonstrating decreased cell proliferation and inhibition of Kit, Erk 1/2, and Stat3 phosphorylation (PMID: 24205792). 24205792
KIT A502_Y503dup KIT N822K gastrointestinal stromal tumor predicted - resistant Imatinib Case Reports/Case Series Actionable In a clinical study, KIT N822K was identified as a secondary mutation in a patient with gastrointestinal stromal tumor harboring a primary KIT A502_Y503dup mutation, who developed resistance to Gleevec (imatinib) (PMID: 18488160). 18488160
KIT A502_Y503dup KIT N822K gastrointestinal stromal tumor sensitive Ripretinib Preclinical - Cell culture Actionable In a preclinical study, Qinlock (ripretinib) inhibited viability of a gastrointestinal stromal tumor cell line harboring KIT A502_Y503dup and expressing KIT N822K in culture (PMID: 38408285). 38408285
KIT A502_Y503dup KIT N822K gastrointestinal stromal tumor resistant Sunitinib Preclinical - Cell culture Actionable In a preclinical study, a gastrointestinal stromal tumor cell line harboring KIT A502_Y503dup and expressing KIT N822K demonstrated resistance to Sutent (sunitinib) in culture (PMID: 38408285). 38408285
KIT W557_K558delinsCE KIT N822K gastrointestinal stromal tumor predicted - resistant Imatinib Case Reports/Case Series Actionable In a clinical study, KIT N822K was identified as a secondary mutation in a patient with gastrointestinal stromal tumor harboring a primary KIT W557_K558delinsCE mutation, who developed resistance to Gleevec (imatinib mesylate) (PMID: 18488160). 18488160
KIT V569_L576del KIT V654A KIT N822K gastrointestinal stromal tumor predicted - resistant Imatinib Case Reports/Case Series Actionable In a clinical study, KIT V654A and KIT N822K were identified as secondary mutations in a patient with gastrointestinal stromal tumor harboring a primary KIT V569_L576del mutation, who developed resistance to Gleevec (imatinib) (PMID: 18488160). 18488160
KIT K642E KIT N822K gastrointestinal stromal tumor sensitive AZD3229 Preclinical - Pdx Actionable In a preclinical study, AZD3229 inhibited Kit signaling and tumor growth in a patient-derived xenograft (PDX) model of gastrointestinal stromal tumor harboring KIT K642E and KIT N822K (PMID: 32350132). 32350132
KIT K642E KIT N822K gastrointestinal stromal tumor sensitive Regorafenib Preclinical - Pdx Actionable In a preclinical study, Stivarga (regorafenib) suppressed tumor growth in a patient-derived xenograft (PDX) model of gastrointestinal stromal tumor harboring KIT K642E and KIT N822K, but was less potent in comparison to treatment with AZD3229 (PMID: 32350132). 32350132
KIT exon 11 del KIT N822K Advanced Solid Tumor predicted - sensitive THE-630 Preclinical - Cell culture Actionable In a preclinical study, THE-630 treatment inhibited growth of cells co-expressing a KIT exon 11 deletion and KIT N822K in culture (Cancer Res 2021;81(13_Suppl):Abstract nr 1292). detail...
KIT exon 11 del KIT N822K gastrointestinal stromal tumor sensitive Ripretinib Preclinical - Cell culture Actionable In a preclinical study, Qinlock (ripretinib) inhibited viability of a gastrointestinal stromal tumor cell line harboring a KIT exon 11 deletion and expressing KIT N822K in culture (PMID: 38408285). 38408285
KIT exon 11 del KIT N822K gastrointestinal stromal tumor resistant Sunitinib Preclinical - Cell culture Actionable In a preclinical study, a gastrointestinal stromal tumor cell line harboring a KIT exon 11 deletion and expressing KIT N822K demonstrated resistance to Sutent (sunitinib) in culture (PMID: 38408285). 38408285
KIT V560D KIT D820G KIT N822K KIT Y870* gastrointestinal stromal tumor predicted - resistant Binimetinib + Imatinib Case Reports/Case Series Actionable In a Phase II trial, KIT N822K and KIT D820G were identified as secondary resistance mutations in a patient with a gastrointestinal stromal tumor harboring primary KIT Y870* and V560D mutations who developed resistance to Gleevec (imatinib) and Mektovi (binimetinib) treatment (PMID: 35041493; NCT01991379). 35041493
KIT V560del KIT N822K gastrointestinal stromal tumor predicted - resistant Imatinib Case Reports/Case Series Actionable In a clinical case study, a patient with gastrointestinal stromal tumor harboring KIT V560del progressed following an initial response to Gleevec (imatinib), and was found to have acquired the secondary resistance mutation KIT N822K (PMID: 18294292). 18294292
KIT V555_D572del KIT N822K gastrointestinal stromal tumor predicted - resistant Imatinib Case Reports/Case Series Actionable In a clinical case study, a patient with gastrointestinal stromal tumor harboring KIT V555_D572del progressed following an initial response to Gleevec (imatinib), and was found to have acquired the secondary resistance mutation KIT N822K (PMID: 18294292). 18294292
KIT exon 11 del KIT V654A KIT N822K gastrointestinal stromal tumor resistant Ripretinib Preclinical - Cell culture Actionable In a preclinical study, a gastrointestinal stromal tumor cell line harboring a KIT exon 11 deletion and expressing KIT V654A and N822K demonstrated resistance to Qinlock (ripretinib) in culture (PMID: 38408285). 38408285
KIT exon 11 del KIT V654A KIT N822K gastrointestinal stromal tumor sensitive Avapritinib Preclinical - Cell culture Actionable In a preclinical study, Ayvakit (avapritinib) inhibited viability of a gastrointestinal stromal tumor cell line harboring a KIT exon 11 deletion and KIT N822K and V654A in culture (PMID: 38408285). 38408285
KIT A502_Y503dup KIT T574_P577del KIT V654A KIT N822K gastrointestinal stromal tumor predicted - resistant Ripretinib Case Reports/Case Series Actionable In a retrospective study, a patient with a gastrointestinal stromal tumor harboring KIT A502_Y503dup progressed on third-line treatment with Qinlock (ripretinib) after 7.0 months and was found to have acquired KIT T574_P577del (reported as P573_L576del), V654A, and N822K in one of the metastatic lesions (PMID: 38408285). 38408285