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Biology

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Cell Biology

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Cell Division

Cell Cycle Control by APC

Description

The anaphase-promoting complex, or APC, helps control cell cycle progression. It acts during cell division to help move the process from one stage to the next. This control is important for proper timing in the cell cycle.

APC is a protein complex that works as a regulator. It helps trigger key s...

Transcript

有丝分裂后期的成功完成还依赖于一种称为后期促进复合物或周期素体(APC/C)的泛素连接酶的活性。

在向后期过渡的过程中,Cdc20 蛋白结合并激活 APC/C。被激活的 APC/C 对调控蛋白 S 型周期蛋白和 M 型周期蛋白进行泛素化,从而使其靶向蛋白酶体降解。

细胞周期蛋白的降解会抑制大多数周期蛋白依赖性激酶(Cdks)的活性。周期蛋白依赖性激酶活性的缺失使得磷酸酶能够去磷酸化细胞内大多数Cdk底物,这是完成后期(anaphase)所必需的。

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