钙调蛋白依赖的蛋白激酶Ⅱ在卵母细胞减数分裂和受精中的作用(英文)  

Roles of Calmodulin-dependent Protein Kinase Ⅱ in Meiotic Maturation and Fertilization of Oocytes

作　　者：范衡宇[1] 霍立军[1] 孙青原[1] 

机构地区：[1]中国科学院动物研究所

出　　处：《生物化学与生物物理进展》2003年第2期171-174,共4页Progress In Biochemistry and Biophysics

基　　金：国家重点基础研究发展规划项目(973)(G19990 5 5 90 2 );中国科学院知识创新工程重要方向性项目(KSCX2 SW 3 0 3 );国家杰出青年基金 (3 0 2 2 5 0 10 )资助~~

摘　　要：钙调蛋白依赖的蛋白激酶 (CaMK)是一类分布广泛的丝 /苏氨酸蛋白激酶家族 ,在钙离子和钙调蛋白存在的条件下发生自磷酸化而被激活 ,在细胞内对于钙信号的传递具有重要的介导作用 .近年来的研究表明CaMKⅡ是参与调节卵母细胞减数分裂的重要分子 ,在卵母细胞成熟、极体排放、受精和活化等过程中发挥作用 .CaMKⅡ作为Ca2 + 的下游信号分子 ,在受精后促进成熟促进因子 (MPF)和细胞静止因子 (CSF)的失活 ,并调节纺锤体微管的组装和中心体的复制过程 .虽然CaMKⅡ在减数分裂中的作用广泛而关键 ,但目前的研究主要集中于低等动物和小鼠 。Calmodulin dependent protein kinase (CaMK), activated by auto phosphorylation at the presence of calcium and calmodulin, is widely distributed in eukaryotes. CaMKs are important mediators of calcium signal in eukaryotes. Recent researches have suggested that CaMKⅡ is involved in the regulation of meiotic cell cycle of oocytes. It plays functional roles in meiotic maturation, polar body extrusion, fertilization and egg activation. As one of the down stream signaling molecules of calcium, CaMKⅡ facilitates the inactivation of maturation promoting factor (MPF) and cytostatic factor (CSF) following fertilization, as well as the spindle microtubule organization and centrosome duplication. Although the functions of CaMKⅡ in oocyte meiosis are versatile and essential, the present results are primarily obtained from low vertebrates and mouse. In future studies, the function and regulation of this kinase in other mammals should be stressed.

关 键 词：钙调蛋白依赖的蛋白激酶Ⅱ 卵母细胞 减数分裂 受精 CAMK 细胞周期 

分 类 号：Q26[生物学—细胞生物学]