NCIt definition : Cyclin-A2 (432 aa, 49 kDa) is encoded by the human CCNA2 gene. This protein is involved
in the regulation of both the cell cycle and mitosis.;
NCIt note : Cyclin A2 accumulates during G2, is abruptly destroyed at mitosis, controls the cell
cycle, and promotes both G1/S and G2/M transitions. Inhibition of cyclin A synthesis
or activity inhibits DNA synthesis. Highly conserved cyclins (proliferating cell nuclear
antigens) regulate CDK kinases. Cyclin A interacts with CDK2 protein kinase and Ser/Thr
kinase p34CDC2 (during G2/M) to form a holoenzyme complex; cyclin imparts substrate
specificity to the complex. (LocusLink, Swiss-Prot, OMIM);