AATYK: a novel tyrosine kinase induced during growth arrest and apoptosis of myeloid cells

Oncogene
E GaozzaE P Reddy

Abstract

Apoptosis, or programmed cell death, is a process where developmental or environmental stimuli activate a genetic program to implement a series of events that culminate in cell death. To study the nature of genes that are induced during the apoptotic death of myeloid precursor cells, we utilized the 32Dcl3 cell line, which is derived from normal mouse bone marrow, is non-tumorigenic and diploid. These cells are strictly dependent on IL-3 for growth and apoptose when deprived of IL-3. However, when these cells are transferred to medium containing G-CSF, the cell number increases 4-5-fold and after 12 days the entire population is differentiated into granulocytes followed by apoptotic death. In our search for genes that are induced during apoptosis and/or terminal differentiation of 32Dcl3 cells, we identified a novel gene termed AATYK (Apoptosis Associated Tyrosine Kinase), whose expression is dramatically upregulated during IL-3 deprivation as well as G-CSF-induced terminal differentiation. In this report, we describe the sequence of the cDNA clone, derived from the mRNA transcript of this gene. These studies show that this gene encodes a protein with a tyrosine kinase domain at the N-terminal end and a proline-rich domain at t...Continue Reading

Citations

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Apoptosis

Apoptosis is a specific process that leads to programmed cell death through the activation of an evolutionary conserved intracellular pathway leading to pathognomic cellular changes distinct from cellular necrosis