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| Gene | KIT |
| Variant | Q575_P577delinsH |
| Impact List | indel |
| Protein Effect | gain of function - predicted |
| Gene Variant Descriptions | KIT Q575_P577delinsH results in a deletion of three amino acids in the juxtamembrane domain (exon 11) of the Kit protein from amino acids 575 to 577, combined with the insertion of a histidine (H) at the same site (PMID: 16226710). Q575_P577delinsH has not been characterized, however similar Kit exon 11 deletions are activating (PMID: 9438854, PMID: 15365079), and therefore, is predicted to lead to a gain of Kit protein function. |
| Associated Drug Resistance | |
| Category Variants Paths |
KIT mutant KIT act mut KIT exon 11 del KIT Q575_P577delinsH KIT mutant KIT exon11 KIT exon 11 del KIT Q575_P577delinsH |
| Transcript | NM_000222.3 |
| gDNA | chr4:g.54727493_54727498delACTTCC |
| cDNA | c.1725_1730delACTTCC |
| Protein | p.Q575_P577delinsH |
| Source Database | RefSeq |
| Genome Build | GRCh38/hg38 |
| Transcript | gDNA | cDNA | Protein | Source Database | Genome Build |
|---|---|---|---|---|---|
| NM_001385285.1 | chr4:g.54727493_54727498delACTTCC | c.1725_1730delACTTCC | p.Q575_P577delinsH | RefSeq | GRCh38/hg38 |
| NM_000222.3 | chr4:g.54727493_54727498delACTTCC | c.1725_1730delACTTCC | p.Q575_P577delinsH | RefSeq | GRCh38/hg38 |
| Molecular Profile | Indication/Tumor Type | Response Type | Therapy Name | Approval Status | Evidence Type | Efficacy Evidence | References |
|---|---|---|---|---|---|---|---|
| KIT Q575_P577delinsH | thymus squamous cell carcinoma | predicted - sensitive | Lenvatinib | Case Reports/Case Series | Actionable | In a clinical case study, Lenvima (lenvatinib) treatment resulted in a partial response with treatment lasting 10 months in a patient with metastatic thymic squamous cell carcinoma harboring KIT Q575_P577delinsH (PMID: 38706977). | 38706977 |
| KIT Q575_P577delinsH | gastrointestinal stromal tumor | predicted - sensitive | Imatinib | Case Reports/Case Series | Actionable | In a clinical study, Gleevec (imatinib) treatment resulted in partial responses in 2 patients with metastatic rectal gastrointestinal stromal tumor harboring germline KIT Q575_P577delinsH, with treatment ongoing for at least 58 months in one patient and disease stabilization ongoing for at least 12 months in the second patient (PMID: 18183595). | 18183595 |