- 作者: Tang-Yuan Chu; Peter Besmer
- 作者服務機構: Program of Molecular Biology, Memorial Sloan Kettering Cancer Center, New York, N.Y., USA
- 中文摘要: --
- 英文摘要: The proto-oncogene c-kit encodes a transmembrane receptor with tyrosine kinase activity, which transduces signal from kit ligand (KL), and is responsi- ble for hematogenesis, melanogenesis and gametogenesis during fetal develop- ment and adult life. Partial or complete loss of c-kit function due to mutation of the c-kit or KL gene accounts for the phenotypes of the murine White- spotting and Steel mutations, respectively. The c-kit protein has the structural features of extracellular immunoglobulin-like domains and intracellular ki- nase domain with a hydrophilic 'insert'. These features have categorized c-kit along with platelet-derived growth factor receptors, colony-stimulating fac- tor 1 receptor (c-fms)and others to subclass III of the receptor tyrosine kinases. We report the structure of the murine c-kit gene. The c-kit gene consists of 21 exons and spans at least 70 kb. The 5' and 3' flanking exons encode the untranslated sequences as well as part of the coding sequence. The internal exons are typically small with each of them encoding a structurally important subunit of the protein. Comparison of gene structures of members of the sub- class III receptor tyrosine kinases has improved our understanding of the structure-functional relationship of the c-kit protein.
- 中文關鍵字: --
- 英文關鍵字: Proto-oncogene; Gene structure; Genetic locus