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Gene KIT
Variant T22A
Impact List missense
Protein Effect unknown
Gene Variant Descriptions KIT T22A lies within the signal peptide region of the Kit protein (UniProt.org). T22A has been identified in sequencing studies (PMID: 21720365), but has not been biochemically characterized and therefore, its effect on Kit protein function is unknown (PubMed, Nov 2024).
Associated Drug Resistance
Category Variants Paths

KIT mutant KIT T22A

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Transcript NM_000222.3
gDNA chr4:g.54658078A>G
cDNA c.64A>G
Protein p.T22A
Source Database RefSeq
Genome Build GRCh38/hg38
Transcript gDNA cDNA Protein Source Database Genome Build
XM_005265740.1 chr4:g.54658078A>G c.64A>G p.T22A RefSeq GRCh38/hg38
NM_000222.3 chr4:g.54658078A>G c.64A>G p.T22A RefSeq GRCh38/hg38
XM_005265742 chr4:g.54658078A>G c.64A>G p.T22A RefSeq GRCh38/hg38
NM_001093772.1 chr4:g.54658078A>G c.64A>G p.T22A RefSeq GRCh38/hg38
XM_017008180 chr4:g.54658078A>G c.64A>G p.T22A RefSeq GRCh38/hg38
XM_005265741.1 chr4:g.54658078A>G c.64A>G p.T22A RefSeq GRCh38/hg38
NM_001385288.1 chr4:g.54658078A>G c.64A>G p.T22A RefSeq GRCh38/hg38
XM_005265741 chr4:g.54658078A>G c.64A>G p.T22A RefSeq GRCh38/hg38
XM_005265742.3 chr4:g.54658078A>G c.64A>G p.T22A RefSeq GRCh38/hg38
XM_005265740 chr4:g.54658078A>G c.64A>G p.T22A RefSeq GRCh38/hg38
NM_000222.2 chr4:g.54658078A>G c.64A>G p.T22A RefSeq GRCh38/hg38
NM_001385285.1 chr4:g.54658078A>G c.64A>G p.T22A RefSeq GRCh38/hg38
XM_017008179 chr4:g.54658078A>G c.64A>G p.T22A RefSeq GRCh38/hg38
NM_001385286.1 chr4:g.54658078A>G c.64A>G p.T22A RefSeq GRCh38/hg38
XM_017008178.1 chr4:g.54658078A>G c.64A>G p.T22A RefSeq GRCh38/hg38
XM_017008180.1 chr4:g.54658078A>G c.64A>G p.T22A RefSeq GRCh38/hg38
NM_001093772.2 chr4:g.54658078A>G c.64A>G p.T22A RefSeq GRCh38/hg38
NM_001093772 chr4:g.54658078A>G c.64A>G p.T22A RefSeq GRCh38/hg38
NM_001385292.1 chr4:g.54658078A>G c.64A>G p.T22A RefSeq GRCh38/hg38
XM_017008178 chr4:g.54658078A>G c.64A>G p.T22A RefSeq GRCh38/hg38
XM_017008179.1 chr4:g.54658078A>G c.64A>G p.T22A RefSeq GRCh38/hg38
NM_000222 chr4:g.54658078A>G c.64A>G p.T22A RefSeq GRCh38/hg38
NM_001385284.1 chr4:g.54658078A>G c.64A>G p.T22A RefSeq GRCh38/hg38
NM_001385290.1 chr4:g.54658078A>G c.64A>G p.T22A RefSeq GRCh38/hg38

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Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
KIT mutant melanoma sensitive Nilotinib Phase II Actionable In a Phase II trial, Tasigna (nilotinib) treatment in patients with melanoma harboring KIT mutations resulted in an overall response rate of 26.2% (11/42), which included 11 patients with a partial response, a median duration of response of 7.1 months, and an overall survival of 18 months (PMID: 28327988; NCT01028222). 28327988
KIT mutant melanoma sensitive Nilotinib Phase II Actionable In a Phase II trial, Tasigna (nilotinib) treatment resulted in complete response in 4% (1/25), durable partial response in 16% (4/25), and stable disease in 56% (14/25) of melanoma patients harboring KIT mutations (PMID: 28843487; NCT01168050). 28843487
KIT mutant gastrointestinal stromal tumor predicted - sensitive Ripretinib Phase I Actionable In a Phase I trial, Qinlock (ripretinib) demonstrated preliminary safety and efficacy in patients with advanced solid tumors, including KIT-mutant gastrointestinal stromal tumor (GIST), with 1 patient harboring KIT exon 11 and 17 mutations demonstrating a partial response, and 7/7 KIT-mutant GIST patients demonstrating a partial metabolic response (EORTC-NCI-AACR 2016, Abs 7LBA). detail...
KIT mutant gastrointestinal stromal tumor predicted - sensitive Ripretinib Phase I Actionable In a Phase I trial, Qinlock (ripretinib) was well tolerated, resulted in an objective response in 11.3% (16/142, 16 partial responses) and stable disease in 61.3% (87/142) of patients with advanced gastrointestinal stromal tumor harboring KIT (exon 11, n=103; exon 9, n=26; other, n=6) or PDGFRA mutations (n=7), with a median progression-free survival of 5.6 months (PMID: 32804590; NCT02571036). 32804590
KIT mutant gastrointestinal stromal tumor not applicable N/A Clinical Study Diagnostic KIT mutations are used in the diagnosis of gastrointestinal stromal tumors (PMID: 25193432, PMID: 26276366, PMID: 25729899). 25193432 26276366 25729899
KIT mutant gastrointestinal stromal tumor predicted - sensitive Avapritinib Phase I Actionable In a Phase I (NAVIGATOR) trial, Ayvakit (avapritinib) treatment resulted in an objective response rate of 13% (7/52, 7 partial responses) and a disease control rate of 63% (33/52) in patients with KIT-mutant gastrointestinal stromal tumor (The CTOS 2018 Annual Meeting, Nov 14-17, Rome Italy, Paper 012 3027631; NCT02508532). detail...
KIT mutant melanoma predicted - sensitive Ripretinib Phase I Actionable In a Phase I trial, Qinlock (ripretinib) treatment demonstrated manageable safety and preliminary efficacy in patients with KIT-mutated melanoma, and led to an objective response rate of 23% (6/26, 1 complete and 5 partial responses), a median progression-free survival of 7.3 months, and a median duration of response of 9.1 months (PMID: 35753087; NCT02571036). 35753087
KIT mutant gastrointestinal stromal tumor sensitive Imatinib + Infigratinib Preclinical - Pdx Actionable In a preclinical study, Truseltiq (infigratinib) and Gleevec (imatinib) combination treatment demonstrated enhanced antitumor activity in patient derived xenograft models of gastrointestinal stromal tumor harboring KIT mutations (PMID: 25673643). 25673643