title: A novel tyrosine kinase, hyk, expressed in murine embryonic stem cells.
abstract: To identify tyrosine kinases which play roles in mammalian early development, the 3' rapid amplification of cDNA ends (RACE) was performed on mouse embryonic stem (ES) cells. Among eight tyrosine kinases thus identified, we report here a novel tyrosine kinase, hyk (adhesion structures linked tyrosine kinase). The sequences of the 4.7 kb cDNA indicated the presence of RGD motif and three epidermal growth factor-like domains put between two immunoglobulin-like domains and three fibronectin type III domains in its extracellular region. It is strongly expressed in ES cells and later stages of embryos, but at low levels in midgestation embryos. It is also expressed at a low level in neural precursor cells from 10-day embryos, but at high levels in embryonic day 15 and neonatal brains. In adult tissues it is expressed ubiquitously.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002460:Cell Line; D003001:Cloning, Molecular; D004247:DNA / Q000235:genetics / Q000302:isolation & purification; D004622:Embryo, Mammalian; D051379:Mice; D008810:Mice, Inbred C57BL; D008808:Mice, Inbred CBA; D008969:Molecular Sequence Data; D009838:Oligodeoxyribonucleotides; D011061:Poly A / Q000235:genetics / Q000302:isolation & purification; D016133:Polymerase Chain Reaction; D011487:Protein Conformation; D011505:Protein-Tyrosine Kinases / Q000235:genetics*; D012313:RNA / Q000235:genetics / Q000302:isolation & purification; D012333:RNA, Messenger / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism; D020794:Receptor Protein-Tyrosine Kinases; D042787:Receptor, TIE-2; D017384:Sequence Deletion; D017386:Sequence Homology, Amino Acid; D013234:Stem Cells / Q000201:enzymology*
chemical_list: D009838:Oligodeoxyribonucleotides; D012333:RNA, Messenger; D011061:Poly A; D012313:RNA; D004247:DNA; D011505:Protein-Tyrosine Kinases; D020794:Receptor Protein-Tyrosine Kinases; D042787:Receptor, TIE-2; C079086:Tek protein, mouse