Cdc2蛋白激酶与环素A和B复杂化:证据表明MPF的蛋白质分解性失活
G Draetta1, F Luca, J Westendorf
1Cold Spring Harbor Laboratory, New York 11724.
Cell
|March 10, 1989
概括
卵细胞和胚胎含有与循环素A和B相关的cdc2蛋白激酶.循环素蛋白解使M阶段促进因子 (MPF) 失活,使其能够从线粒分裂中退出.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 发展生物学 发展生物学
背景情况:
- 斯皮苏拉贝中的A和B环素在线粒分裂后经历了降解.
- cdc2蛋白激酶是细胞周期进展的关键调节剂.
研究的目的:
- 为了研究cdc2蛋白激酶的作用及其与菌粒分裂中的环林的关联.
- 阐明卵细胞和胚胎中M阶段促进因子 (MPF) 调节的机制.
主要方法:
- 对cdc2蛋白激酶和环林相互作用的生物化学分析.
- 在细胞循环依赖复合体中测定基因素H1激酶活性.
- 使用p13suc1-Sepharose和免疫沉技术.
主要成果:
- 卵细胞和胚胎具有cdc2蛋白激酶活性.
- cdc2与环林A和环林B结合,形成不同的复合体.
- 这些复合体表现出细胞循环依赖的 histone H1 激酶活性.
结论:
- 环A和B是M阶段促进因子 (MPF) 的组成部分.
- 环林的蛋白质分解降解是MPF失活的可能机制.
- 这一过程促进了贝卵细胞和胚胎的脱离线分裂的过程.
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