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CYL encodes a putative cytoplasmic tyrosine kinase lacking the conserved tyrosine autophosphorylation site (Y416src).

Partanen J., Armstrong E., Bergman M., Maekelae T.P., Hirvonen H., Huebner K., Alitalo K.

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.

Oncogene 6:2013-2018(1991) [PubMed] [Europe PMC]

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