Aliases for CDC25B Gene
External Ids for CDC25B Gene
CDC25B is a member of the CDC25 family of phosphatases. CDC25B activates the cyclin dependent kinase CDC2 by removing two phosphate groups and it is required for entry into mitosis. CDC25B shuttles between the nucleus and the cytoplasm due to nuclear localization and nuclear export signals. The protein is nuclear in the M and G1 phases of the cell cycle and moves to the cytoplasm during S and G2. CDC25B has oncogenic properties, although its role in tumor formation has not been determined. Multiple transcript variants for this gene exist. [provided by RefSeq, Jul 2008]
GeneCards Summary for CDC25B Gene
CDC25B (Cell Division Cycle 25B) is a Protein Coding gene. Among its related pathways are MAPK signaling pathway and ERK Signaling. GO annotations related to this gene include protein kinase binding and protein tyrosine phosphatase activity. An important paralog of this gene is CDC25C.
UniProtKB/Swiss-Prot for CDC25B Gene
Tyrosine protein phosphatase which functions as a dosage-dependent inducer of mitotic progression. Required for G2/M phases of the cell cycle progression and abscission during cytokinesis in a ECT2-dependent manner. Directly dephosphorylates CDK1 and stimulates its kinase activity. The three isoforms seem to have a different level of activity.
Cdc25 is a dual specificity phosphatase with three isoforms in mammalian cells - cdc25A, B and C. Cdc25 activates cdk complexes that control progression through the cell cycle. Cdc25 is also involved in the DNA damage checkpoints. Regulation of cdc25 occurs through a variety of mechanisms including phosphorylation, interaction with 14.3.3 proteins, subcellular localization and protein degradation. Cdc25B is phosphorylated and activated by aurora kinase A at the start of mitosis, and as mitosis progresses is then further phosphorylated in an auto-amplification loop, along with cdc25C, by the CDK1/cyclin B complex. Cdc25C is also phosphorylated during mitosis by PLK1, leading to greater activity of the CDK1/cyclin B complex. Similarly, Cdc25A acts during the G1/S phase of the cell cycle in concert with the CDK2/cyclin E complex. Both cdc25A and cdc25B can be activated by the DNA damage checkpoint kinase, Chk1 and thereby inhibit mitosis.