Gene Variant Detail

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Gene KIT
Variant W557_K558del
Impact List deletion
Protein Effect gain of function
Gene Variant Descriptions KIT W557_K558del results in the deletion of 2 amino acids in the juxtamembrane domain (exon 11) of the Kit protein from amino acids 557 to 558 (PMID: 12918066). W557_K558del results in constitutive activation of Kit and increased Erk phosphorylation, and leads to increased invasiveness and expression of ETV1 in cell culture (PMID: 25239608, PMID: 26936919).
Associated Drug Resistance
Category Variants Paths

KIT mutant KIT act mut KIT exon 11 del KIT W557_K558del

KIT mutant KIT exon11 KIT exon 11 del KIT W557_K558del

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Transcript NM_000222.3
gDNA chr4:g.54727437_54727442delTGGAAG
cDNA c.1669_1674delTGGAAG
Protein p.W557_K558delWK
Source Database RefSeq
Genome Build GRCh38/hg38
Transcript gDNA cDNA Protein Source Database Genome Build
NM_001385286.1 chr4:g.54727449_54727454delGAGGAG c.1669_1674delGAGGAG p.E557_E558delEE RefSeq GRCh38/hg38
NM_001093772.2 chr4:g.54727449_54727454delGAGGAG c.1669_1674delGAGGAG p.E557_E558delEE RefSeq GRCh38/hg38
NM_001385292.1 chr4:g.54727447_54727452delTTGAGG c.1670_1675delTTGAGG p.V557_E558delVE RefSeq GRCh38/hg38
NM_001385288.1 chr4:g.54727447_54727452delTTGAGG c.1670_1675delTTGAGG p.V557_E558delVE RefSeq GRCh38/hg38
NM_001385290.1 chr4:g.54727434_54727439delCAGTGG c.1669_1674delCAGTGG p.Q557_W558delQW RefSeq GRCh38/hg38
NM_000222.3 chr4:g.54727437_54727442delTGGAAG c.1669_1674delTGGAAG p.W557_K558delWK RefSeq GRCh38/hg38
NM_001385284.1 chr4:g.54727434_54727439delCAGTGG c.1669_1674delCAGTGG p.Q557_W558delQW RefSeq GRCh38/hg38
XM_017008178.1 chr4:g.54727437_54727442delTGGAAG c.1669_1674delTGGAAG p.W557_K558del RefSeq GRCh38/hg38
NM_000222.2 chr4:g.54727437_54727442delTGGAAG c.1669_1674delTGGAAG p.W557_K558del RefSeq GRCh38/hg38
XM_017008178 chr4:g.54727437_54727442delTGGAAG c.1669_1674delTGGAAG p.W557_K558del RefSeq GRCh38/hg38
NM_000222 chr4:g.54727437_54727442delTGGAAG c.1669_1674delTGGAAG p.W557_K558del RefSeq GRCh38/hg38
NM_001385285.1 chr4:g.54727437_54727442delTGGAAG c.1669_1674delTGGAAG p.W557_K558delWK 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 V654A Advanced Solid Tumor sensitive Ponatinib Preclinical - Cell line xenograft Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT V654A demonstrated sensitivity to treatment with Iclusig (ponatinib) in both culture and cell line xenograft models, resulting in reduced cell viability and decreased tumor volume (PMID: 25239608). 25239608
KIT W557_K558del KIT V654A Advanced Solid Tumor sensitive Sunitinib Preclinical - Cell line xenograft Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT V654A demonstrated sensitivity to treatment with Sutent (sunitinib) in both culture and cell line xenograft models, resulting in reduced cell viability, decreased tumor volume, and tumor regression (PMID: 25239608). 25239608
KIT W557_K558del KIT V654A Advanced Solid Tumor no benefit Imatinib Preclinical - Cell line xenograft Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT V654A demonstrated no response to treatment with Gleevec (imatinib) in both culture and xenograft models (PMID: 25239608). 25239608
KIT W557_K558del KIT V654A Advanced Solid Tumor resistant Regorafenib Preclinical Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT V654A demonstrated resistance to treatment with Stivarga (regorafenib) in culture (PMID: 25239608). 25239608
KIT W557_K558del KIT V654A gastrointestinal stromal tumor sensitive Avapritinib Preclinical - Pdx Actionable In a preclinical study, Ayvakit (avapritinib) inhibited Kit phosphorylation and resulted in tumor regression in patient-derived xenograft models of Gleevec (imatinib)-resistant gastrointestinal stromal tumor harboring KIT W557_K558del and V654A (PMID: 29093181). 29093181
KIT W557_K558del KIT V654A 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 W557_K558del and KIT V654A, which was established from a patient who did not respond to Gleevec (imatinib) treatment (PMID: 32350132). 32350132
KIT W557_K558del KIT V654A gastrointestinal stromal tumor sensitive Sunitinib Preclinical - Pdx Actionable In a preclinical study, Sutent (sunitinib) inhibited tumor growth in a patient-derived xenograft (PDX) model of gastrointestinal stromal tumor harboring KIT W557_K558del and KIT V654A, which was established from a patient who did not respond to Gleevec (imatinib) treatment (PMID: 32350132). 32350132
KIT W557_K558del KIT V654A Advanced Solid Tumor sensitive AZD3229 Preclinical - Cell line xenograft Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT V654A demonstrated sensitivity to treatment with AZD3229 in both culture and cell line xenograft models, resulting in reduced cell viability, decreased KIT signaling, and tumor regression (PMID: 32350132). 32350132
KIT W557_K558del KIT V654A Advanced Solid Tumor resistant Avapritinib Preclinical - Cell line xenograft Actionable In a preclinical study, Ayvakit (avapritinib) failed to inhibit cell growth or KIT signaling in culture and did not suppress tumor growth in cell line xenograft models of transformed cells expressing KIT W557_K558del and KIT V654A (PMID: 32350132). 32350132
KIT W557_K558del KIT V654A Advanced Solid Tumor resistant Ripretinib Preclinical - Cell culture Actionable In a preclinical study, Qinlock (ripretinib) failed to reduce cell viability and inhibit KIT signaling in transformed cells expressing KIT W557_K558del and KIT V654A in culture (PMID: 32350132). 32350132
KIT W557_K558del KIT V654A gastrointestinal stromal tumor predicted - resistant Imatinib Case Reports/Case Series Actionable In a clinical case study, three patients with gastrointestinal stromal tumors harboring KIT W557_K558del progressed following an initial response to Gleevec (imatinib), and were found to have acquired the secondary resistance mutation KIT V654A (PMID: 18294292). 18294292
KIT W557_K558del KIT V654A gastrointestinal stromal tumor predicted - resistant Ripretinib Case Reports/Case Series Actionable In a retrospective study, a patient with a gastrointestinal stromal tumor harboring KIT W557_K558del progressed on second-line treatment with Qinlock (ripretinib) after 3 months and was found to have acquired KIT V654A in the metastatic lesion (PMID: 38408285). 38408285
KIT W557_K558del KIT T670I Advanced Solid Tumor sensitive Ponatinib Preclinical Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT T670I demonstrated sensitivity to treatment with Iclusig (ponatinib) in both culture and cell line xenograft models, resulting in reduced cell viability and decreased tumor volume (PMID: 25239608). 25239608
KIT W557_K558del KIT T670I Advanced Solid Tumor sensitive Sunitinib Preclinical - Cell line xenograft Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT T670I demonstrated sensitivity to treatment with Sutent (sunitinib) in both culture and cell line xenograft models, resulting in reduced cell viability, decreased tumor volume, and tumor regression (PMID: 25239608). 25239608
KIT W557_K558del KIT T670I Advanced Solid Tumor no benefit Imatinib Preclinical - Cell line xenograft Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT T670I demonstrated no response to treatment with Gleevec (imatinib) in both culture and xenograft models (PMID: 25239608). 25239608
KIT W557_K558del KIT T670I Advanced Solid Tumor decreased response Regorafenib Preclinical Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT T670I demonstrated a decreased response to treatment with Stivarga (regorafenib) compared to cells expressing KIT W557_K558del alone in culture (PMID: 25239608). 25239608
KIT W557_K558del KIT T670I Advanced Solid Tumor decreased response Regorafenib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT T670I demonstrated a decreased response to treatment with Stivarga (regorafenib) compared to cells expressing KIT W557_K558del alone in culture (PMID: 32350132). 32350132
KIT W557_K558del KIT T670I Advanced Solid Tumor resistant Dasatinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing a KIT W557_K558del/T670I double mutation demonstrated resistance to Sprycel (dasatinib) in culture (PMID: 17699867). 17699867
KIT W557_K558del KIT T670I Advanced Solid Tumor resistant Nilotinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing a KIT W557_K558del/T670I double mutation demonstrated resistance to Tasigna (nilotinib) in culture (PMID: 17699867). 17699867
KIT W557_K558del KIT T670I Advanced Solid Tumor sensitive Sorafenib Preclinical - Cell culture Actionable In a preclinical study, Nexavar (sorafenib) inhibited proliferation and induced apoptosis of transformed cells expressing a KIT W557_K558del/T670I double mutation in culture (PMID: 17699867). 17699867
KIT W557_K558del KIT T670I Advanced Solid Tumor sensitive AZD3229 Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT T670I demonstrated sensitivity to AZD3229 in culture, resulting in reduced cell viability (PMID: 32350132). 32350132
KIT W557_K558del KIT T670I Advanced Solid Tumor resistant Avapritinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT T670I demonstrated resistance to Ayvakit (avapritinib) in culture (PMID: 32350132). 32350132
KIT W557_K558del KIT T670I Advanced Solid Tumor decreased response Ripretinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT T670I demonstrated a decreased response to treatment with Qinlock (ripretinib) compared to cells expressing KIT W557_K558del alone in culture (PMID: 32350132). 32350132
KIT W557_K558del KIT T670I gastrointestinal stromal tumor predicted - resistant Imatinib Case Reports/Case Series Actionable In a clinical case study, a patient with gastrointestinal stromal tumor harboring KIT W557_K558del progressed following an initial response to Gleevec (imatinib), and was found to have acquired the secondary resistance mutation KIT T670I (PMID: 18294292). 18294292
KIT W557_K558del KIT D816H Advanced Solid Tumor sensitive Ponatinib Preclinical - Cell line xenograft Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT D816H demonstrated sensitivity to treatment with Iclusig (ponatinib) in both culture and cell line xenograft models, resulting in reduced cell viability and tumor regression (PMID: 25239608). 25239608
KIT W557_K558del KIT D816H Advanced Solid Tumor decreased response Sunitinib Preclinical - Cell line xenograft Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT D816H demonstrated a decreased response to treatment with Sutent (sunitinib) in both culture and cell line xenograft models, resulting in only a slight decrease in tumor volume (PMID: 25239608). 25239608
KIT W557_K558del KIT D816H Advanced Solid Tumor decreased response Imatinib Preclinical - Cell line xenograft Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT D816H demonstrated a decreased response to treatment with Gleevec (imatinib) in both culture and xenograft models, resulting in only a slight decrease in tumor volume (PMID: 25239608). 25239608
KIT W557_K558del KIT D816H Advanced Solid Tumor decreased response Regorafenib Preclinical Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT D816H demonstrated a decreased response to treatment with Stivarga (regorafenib) in culture (PMID: 25239608). 25239608
KIT W557_K558del KIT D816H Advanced Solid Tumor sensitive AZD3229 Preclinical - Cell line xenograft Actionable In a preclinical study, AZD3229 inhibited growth of cells in culture and tumor growth in a cell line xenograft model of transformed cells expressing KIT W557_K558del and KIT D816H (PMID: 32350132). 32350132
KIT W557_K558del KIT D816H Advanced Solid Tumor sensitive Avapritinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT D816H demonstrated sensitivity to Ayvakit (avapritinib) in culture, resulting in reduced cell viability (PMID: 32350132). 32350132
KIT W557_K558del KIT D816H Advanced Solid Tumor sensitive Ripretinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT D816H demonstrated sensitivity to Qinlock (ripretinib) in culture, resulting in reduced cell viability (PMID: 32350132). 32350132
KIT W557_K558del KIT D816H gastrointestinal stromal tumor predicted - resistant Imatinib Case Reports/Case Series Actionable In a clinical case study, a patient with gastrointestinal stromal tumor harboring KIT W557_K558del progressed after experiencing stable disease on treatment with Gleevec (imatinib), and was found to have acquired the secondary resistance mutation KIT D816H (PMID: 18294292). 18294292
KIT W557_K558del KIT Y823D gastrointestinal stromal tumor sensitive Ponatinib Preclinical - Pdx & cell culture Actionable In a preclinical study, a patient derived GIST cell line co-harboring KIT W557_K558del and KIT Y823D demonstrated sensitivity to Iclusig (ponatinib) in a PDX model, resulting in complete tumor regression (PMID: 25239608). 25239608
KIT W557_K558del KIT Y823D gastrointestinal stromal tumor sensitive Ripretinib Preclinical - Pdx Actionable In a preclinical study, Qinlock (ripretinib) induced tumor regression in a patient-derived xenograft (PDX) model of gastrointestinal stromal tumor harboring KIT W557_K558del and KIT Y823D (PMID: 31085175). 31085175
KIT W557_K558del KIT Y823D gastrointestinal stromal tumor sensitive Avapritinib Preclinical - Pdx Actionable In a preclinical study, Ayvakit (avapritinib) inhibited Kit phosphorylation and resulted in tumor regression in patient-derived xenograft models of Gleevec (imatinib mesylate)-resistant gastrointestinal stromal tumor harboring KIT W557_K558del and Y823D (PMID: 29093181). 29093181
KIT W557_K558del KIT Y823D 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 W557_K558del and KIT Y823D (PMID: 32350132). 32350132
KIT W557_K558del KIT Y823D gastrointestinal stromal tumor sensitive Regorafenib Preclinical - Pdx Actionable In a preclinical study, Stivarga (regorafenib) inhibited tumor growth in a patient-derived xenograft (PDX) model of gastrointestinal stromal tumor harboring KIT W557_K558del and KIT Y823D (PMID: 32350132). 32350132
KIT W557_K558del KIT Y823D Advanced Solid Tumor decreased response Ripretinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT Y823D demonstrated a decreased response to treatment with Qinlock (ripretinib) compared to cells expressing KIT W557_K558del alone in culture (PMID: 32350132). 32350132
KIT W557_K558del KIT Y823D Advanced Solid Tumor predicted - sensitive Regorafenib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT Y823D demonstrated sensitivity to treatment with Stivarga (regorafenib), but was decreased compared to cells expressing KIT W557_K558del alone in culture (PMID: 32350132). 32350132
KIT W557_K558del KIT Y823D Advanced Solid Tumor decreased response Avapritinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT Y823D demonstrated a decreased response to treatment with Ayvakit (avapritinib) compared to cells expressing KIT W557_K558del alone in culture (PMID: 32350132). 32350132
KIT W557_K558del KIT Y823D Advanced Solid Tumor resistant Sunitinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT Y823D demonstrated resistance to Sutent (sunitinib) in culture (PMID: 32350132). 32350132
KIT W557_K558del KIT Y823D Advanced Solid Tumor resistant Imatinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT Y823D demonstrated resistance to Gleevec (imatinib) in culture (PMID: 32350132). 32350132
KIT W557_K558del KIT Y823D Advanced Solid Tumor sensitive AZD3229 Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT Y823D demonstrated sensitivity to AZD3229 in culture, resulting in reduced cell viability (PMID: 32350132). 32350132
KIT W557_K558del KIT Y823D gastrointestinal stromal tumor sensitive PLX9486 Preclinical - Pdx Actionable In a preclinical study, PLX9486 treatment decreased Mapk phosphorylation, inhibited proliferation, and reduced tumor growth and induced regression in a Gleevec (imatinib)-resistant patient-derived xenograft (PDX) model of gastrointestinal stromal tumor harboring KIT W557_K558del and Y823D (PMID: 30523507). 30523507
KIT W557_K558del KIT Y823D gastrointestinal stromal tumor predicted - resistant Imatinib Case Reports/Case Series Actionable In a clinical case study, two patients with gastrointestinal stromal tumors harboring KIT W557_K558del progressed following an initial response to Gleevec (imatinib), and were found to have acquired the secondary resistance mutation KIT Y823D in one lesion (PMID: 18294292). 18294292
KIT W557_K558del KIT D816G Advanced Solid Tumor resistant Ponatinib Preclinical Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT D816G were sensitive to Iclusig (ponatinib) in an in vitro kinase assay (PMID: 25239608). 25239608
KIT W557_K558del KIT D816G Advanced Solid Tumor resistant Sunitinib Preclinical Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT D816G were resistant to Sutent (sunitinib) in an in vitro kinase assay (PMID: 25239608). 25239608
KIT W557_K558del KIT D816G Advanced Solid Tumor resistant Imatinib Preclinical Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT D816G were resistant to Gleevec (imatinib) in an in vitro kinase assay (PMID: 25239608). 25239608
KIT W557_K558del KIT D816G Advanced Solid Tumor resistant Regorafenib Preclinical Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT D816G were resistant to Stivarga (regorafenib) in an in vitro kinase assay (PMID: 25239608). 25239608
KIT W557_K558del KIT D820A Advanced Solid Tumor sensitive Ponatinib Preclinical Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT D820A were sensitive to Iclusig (ponatinib) in an in vitro kinase assay (PMID: 25239608). 25239608
KIT W557_K558del KIT D820A Advanced Solid Tumor resistant Sunitinib Preclinical Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT D820A were resistant to Sutent (sunitinib) in an in vitro kinase assay (PMID: 25239608). 25239608
KIT W557_K558del KIT D820A Advanced Solid Tumor resistant Sunitinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT D820A demonstrated resistance to Sutent (sunitinib) in culture (PMID: 32350132). 32350132
KIT W557_K558del KIT D820A Advanced Solid Tumor resistant Imatinib Preclinical Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT D820A were resistant to Gleevec (imatinib) in an in vitro kinase assay (PMID: 25239608). 25239608
KIT W557_K558del KIT D820A Advanced Solid Tumor resistant Imatinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT D820A demonstrated resistance to Gleevec (imatinib) in culture (PMID: 32350132). 32350132
KIT W557_K558del KIT D820A Advanced Solid Tumor conflicting Regorafenib Preclinical Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT D820A were resistant to Stivarga (regorafenib) in an in vitro kinase assay (PMID: 25239608). 25239608
KIT W557_K558del KIT D820A Advanced Solid Tumor conflicting Regorafenib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT D820A were sensitive to treatment with Stivarga (regorafenib), demonstrating reduced cell viability in culture (PMID: 32350132). 32350132
KIT W557_K558del KIT D820A 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 D820A in culture, but was less effective compared to other treatments (PMID: 32350132). 32350132
KIT W557_K558del KIT D820A Advanced Solid Tumor sensitive Ripretinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT D820A demonstrated sensitivity to Qinlock (ripretinib) in culture, resulting in reduced cell viability (PMID: 32350132). 32350132
KIT W557_K558del KIT D820A Advanced Solid Tumor sensitive AZD3229 Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT D820A demonstrated sensitivity to AZD3229 in culture, resulting in reduced cell viability (PMID: 32350132). 32350132
KIT W557_K558del KIT D820G Advanced Solid Tumor sensitive Ponatinib Preclinical Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT D820G were sensitive to Iclusig (ponatinib) in an in vitro kinase assay (PMID: 25239608). 25239608
KIT W557_K558del KIT D820G Advanced Solid Tumor resistant Sunitinib Preclinical Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT D820G were resistant to Sutent (sunitinib) in an in vitro kinase assay (PMID: 25239608). 25239608
KIT W557_K558del KIT D820G Advanced Solid Tumor resistant Imatinib Preclinical Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT D820G were resistant to Gleevec (imatinib) in an in vitro kinase assay (PMID: 25239608). 25239608
KIT W557_K558del KIT D820G Advanced Solid Tumor resistant Regorafenib Preclinical Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT D820G were resistant to Stivarga (regorafenib) in an in vitro kinase assay (PMID: 25239608). 25239608
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 W557_K558del KIT A829P Advanced Solid Tumor sensitive Ponatinib Preclinical Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT A829P were sensitive to Iclusig (ponatinib) in an in vitro kinase assay (PMID: 25239608). 25239608
KIT W557_K558del KIT A829P Advanced Solid Tumor resistant Sunitinib Preclinical - Biochemical Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT A829P were resistant to Sutent (sunitinib) in an in vitro kinase assay (PMID: 25239608). 25239608
KIT W557_K558del KIT A829P Advanced Solid Tumor resistant Sunitinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT A829P demonstrated resistance to Sutent (sunitinib) in culture (PMID: 32350132). 32350132
KIT W557_K558del KIT A829P Advanced Solid Tumor resistant Imatinib Preclinical Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT A829P were resistant to Gleevec (imatinib) in an in vitro kinase assay (PMID: 25239608). 25239608
KIT W557_K558del KIT A829P Advanced Solid Tumor resistant Imatinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT A829P demonstrated resistance to Gleevec (imatinib) in culture (PMID: 32350132). 32350132
KIT W557_K558del KIT A829P Advanced Solid Tumor conflicting Regorafenib Preclinical Actionable In a preclinical study, transformed cells co-expressing KIT W557_K558del and KIT A829P were resistant to Stivarga (regorafenib) in an in vitro kinase assay (PMID: 25239608). 25239608
KIT W557_K558del KIT A829P Advanced Solid Tumor conflicting Regorafenib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT A829P were sensitive to treatment with Stivarga (regorafenib), but demonstrated a decreased response compared to cells expressing KIT W557_K558del alone in culture (PMID: 32350132). 32350132
KIT W557_K558del KIT A829P Advanced Solid Tumor sensitive AZD3229 Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT A829P demonstrated sensitivity to AZD3229 in culture, resulting in reduced cell viability (PMID: 32350132). 32350132
KIT W557_K558del KIT A829P Advanced Solid Tumor sensitive Ripretinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT W557_K558del and KIT A829P demonstrated sensitivity to Qinlock (ripretinib) in culture, resulting in reduced cell viability (PMID: 32350132). 32350132
KIT W557_K558del KIT A829P 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 A829P in culture, but was less effective compared to other treatments (PMID: 32350132). 32350132
KIT W557_K558del KIT D816E KIT D820V gastrointestinal stromal tumor predicted - resistant Imatinib Case Reports/Case Series Actionable In a clinical study, KIT D816E and D820V were identified as secondary mutations in a patient with gastrointestinal stromal tumor harboring KIT W557_K558del who developed resistance to Gleevec (imatinib) (PMID: 18294292). 18294292
KIT W557_K558del KIT V654A KIT D820V gastrointestinal stromal tumor predicted - resistant Ripretinib Case Reports/Case Series Actionable In a retrospective study, a patient with a gastrointestinal stromal tumor harboring KIT W557_K558del progressed on fourth-line treatment with Qinlock (ripretinib) after 3.0 months and was found to have acquired KIT V654A and D820V in the metastatic lesion (PMID: 38408285). 38408285
KIT W557_K558del KIT V654G KIT D816H gastrointestinal stromal tumor predicted - resistant Ripretinib Case Reports/Case Series Actionable In a retrospective study, a patient with a gastrointestinal stromal tumor harboring KIT W557_K558del and D816H progressed on sixth-line treatment with Qinlock (ripretinib) after 11.5 months and was found to have acquired KIT V654G in the metastatic lesion (PMID: 38408285). 38408285
KIT W557_K558del KIT V654A KIT I748D gastrointestinal stromal tumor predicted - resistant Ripretinib Case Reports/Case Series Actionable In a retrospective study, a patient with a gastrointestinal stromal tumor harboring KIT W557_K558del and T670E progressed on fifth-line treatment with Qinlock (ripretinib) after 12 months and was found to have lost T670E but acquired KIT V654A and I748D in the metastatic lesion (PMID: 38408285). 38408285