FunctionEssential for the control of the cell cycle at the G1/S (start) transition.
Tissue specificityHighly expressed in testis and placenta. Low levels in bronchial epithelial cells.
Sequence similaritiesBelongs to the cyclin family. Cyclin E subfamily.
Post-translational modificationsPhosphorylation of Thr-395 by GSK3 and of Ser-399 by CDK2 accelerates degradation via the ubiquitin proteasome pathway. Phosphorylated upon DNA damage, probably by ATM or ATR.