Cell cycle-regulated recognition of the destruction box of cyclin B by the APC/C in Xenopus egg extracts

被引:107
作者
Yamano, H [1 ]
Gannon, J [1 ]
Mahbubani, H [1 ]
Hunt, T [1 ]
机构
[1] Canc Res UK, Clare Hall Labs, S Mimms EN6 3LD, Herts, England
基金
日本科学技术振兴机构;
关键词
D O I
10.1016/S1097-2765(03)00480-5
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Substrates for mitotic proteolysis such as cyclin B have a 9 residue destruction motif, the destruction box (D-box). To identify the receptor that specifically binds the D-box, we used affinity chromatography with immobilized D-box matrices. We find that the APC/C from Xenopus egg extracts binds to the D-box of cyclin B, whereas Fizzy (Cdc20) does not. Mutations in the D-box abolished this interaction. We show that this binding is regulated in the cell cycle, such that the APC/C from egg extracts in interphase does not bind to the D-box matrix. Our results suggest that the APC/C forms a stable interaction with the D-box of its substrates in a cell cycle-dependent manner.
引用
收藏
页码:137 / 147
页数:11
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