cyl encodes a putative cytoplasmic tyrosine kinase lacking the conserved tyrosine autophosphorylation site (Y416src).
We have isolated a cDNA encoding a novel tyrosine kinase family member, named cyl (consensus tyrosine-lacking kinase), from the K562 human leukemia cell line. The deduced cyl protein lacks signal and transmembrane sequences but contains features of known cytoplasmic tyrosine kinases, including amino-terminal SH3 and SH2 domains. However, having very short amino and carboxy termini, cyl does not seem to belong to any of the previously characterized subfamilies of cytoplasmic tyrosine kinases. Furthermore, cyl lacks the highly conserved tyrosine autophosphorylation site (Y416src) in the tyrosine kinase catalytic domain. The cyl gene is located on human chromosome 15. It is expressed ubiquitously as two independently regulated mRNA species of 2.6 and 3.4 kb in human leukemia cell lines and fetal tissues.
Partanen
J
J
Department of Pathology, University of Helsinki, Finland.
Armstrong
E
E
Bergman
M
M
Mäkelä
T P
TP
Hirvonen
H
H
Huebner
K
K
Alitalo
K
K
D000311:Adrenal Glands / Q000378:metabolism; D000595:Amino Acid Sequence; D001483:Base Sequence; D015152:Blotting, Northern; D015139:Blotting, Southern; D001853:Bone Marrow / Q000378:metabolism; D001921:Brain / Q000378:metabolism; D000081247:CSK Tyrosine-Protein Kinase; D002460:Cell Line; D002831:Choroid Plexus / Q000378:metabolism; D002874:Chromosome Mapping; D002884:Chromosomes, Human, Pair 15; D003001:Cloning, Molecular; D004247:DNA / Q000302:isolation & purification; D005333:Fetus / Q000378:metabolism; D006801:Humans; D007668:Kidney / Q000378:metabolism; D007938:Leukemia / Q000378:metabolism*; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D010770:Phosphotransferases; D011505:Protein-Tyrosine Kinases; D011518:Proto-Oncogene Proteins / Q000096:biosynthesis / Q000235:genetics*; D012333:RNA, Messenger / Q000096:biosynthesis; D013154:Spleen / Q000378:metabolism; D013950:Thymus Gland / Q000378:metabolism; D019061:src-Family Kinases
D011518:Proto-Oncogene Proteins; D012333:RNA, Messenger; D004247:DNA; D010770:Phosphotransferases; D011505:Protein-Tyrosine Kinases; D000081247:CSK Tyrosine-Protein Kinase; D019061:src-Family Kinases; C000631346:CSK protein, human