Sequence of this protein is as follows: MALRVTRNSK INAENKAKIN MAGAKRVPTA PAATSKPGLR PRTALGDIGN KVSEQLQAKM PMKKEAKPSA TGKVIDKKLP KPLEKVPMLV PVPVSEPVPE PEPEPEPEPV KEEKLSPEPI LVDTASPSPM ETSGCAPAEE DLCQAFSDVI LAVNDVDAED GADPNLCSEY VKDIYAYLRQ LEEEQAVRPK YLLGREVTGN MRAILIDWLV QVQMKFRLLQ ETMYMTVSII DRFMQNNCVP KKMLQLVGVT AMFIASKYEE MYPPEIGDFA FVTDNTYTKH QIRQMEMKIL RALNFGLGRP LPLHFLRRAS KIGEVDVEQH TLAKYLMELT MLDYDMVHFP PSQIAAGAFC LALKILDNGE WTPTLQHYLS YTEESLLPVM QHLAKNVVMV NQGLTKHMTV KNKYATSKHA KISTLPQLNS ALVQDLAKAV AKV
Cyclins bind to and regulate the activity of the Cyclin dependent protein kinases (CDKs). Cyclin B1 or CCNB1 is a regulatory protein involved in mitosis. It is essential for the control of the cell cycle at the G2/M transition. Cyclin B1 complexes with p34 (cdc2) to form the maturation-promoting factor (MPF). Two alternative transcripts have been found, a constitutively expressed transcript and a cell cycle-regulated transcript, that is expressed predominantly during G2/M phase. Cyclin B1 is not ubiquitinated during G2/M phase, resulting in its steady accumulation during G2 phase, followed by abrupt APC dependent destruction at the end of mitosis. Destruction of Cyclin B1 is required for cell cycle progression. Cyclin B1 is overexpressed in various cancers, including breast, prostate, and non-small cell lung cancer.
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Protein Aliases: G2/mitotic-specific cyclin B1; G2/mitotic-specific cyclin-B1; OTTHUMP00000221981; OTTHUMP00000223023
Gene Aliases: CCNB; CCNB1
UniProt ID: (Human) P14635
Entrez Gene ID: (Human) 891