Reference: Yeong FM, et al. (2001) Early expressed Clb proteins allow accumulation of mitotic cyclin by inactivating proteolytic machinery during S phase. Mol Cell Biol 21(15):5071-81

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Abstract


Periodic accumulation and destruction of mitotic cyclins are important for the initiation and termination of M phase. It is known that both APC(Cdc20) and APC(Hct1) collaborate to destroy mitotic cyclins during M phase. Here we show that this relationship between anaphase-promoting complex (APC) and Clb proteins is reversed in S phase such that the early Clb kinases (Clb3, Clb4, and Clb5 kinases) inactivate APC(Hct1) to allow Clb2 accumulation. This alternating antagonism between APC and Clb proteins during S and M phases constitutes an oscillatory system that generates undulations in the levels of mitotic cyclins.

Reference Type
Journal Article | Research Support, Non-U.S. Gov't
Authors
Yeong FM, Lim HH, Wang Y, Surana U
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