Human/Mouse/Rat CDC25A Antibody

Cell Division Cycle 25A (CDC25A) phosphatase removes inorganic phosphate groups covalently attached to tyrosine, serine and threonine residues in proteins (1). Overexpression of CDC25A in small mammary carcinomas has been associated with a poor patient survival prognosis (2). Levels of CDC25A activity are highest in S phase of the cell cycle, where it is suspected to be involved in “checkpoint” control of cell cycle progression (3). Induction of DNA damage with ultraviolet or ionizing radiation causes an increase in CDC25A ubiquinylation and proteosomal degradation, leading to cell cycle block between G1 and S phases (4). One of its major substrates, the kinase CDC2, is activated by dephosphorylation (5). Recombinant CDC25A is truncated to remove the N-terminal regulatory domains and is fully active.