细胞凋亡中的Bcl-2家族蛋白及其BH3结构域的功能研究

被引:19
作者
柳向军 [1 ]
张令强 [1 ]
刘小林 [2 ]
贺福初 [1 ]
机构
[1] 军事医学科学院放射与辐射医学研究所
[2] 西北农林科技大学动物科技学院
关键词
Bcl-2家族,BH3结构域; 细胞凋亡,线粒体,细胞色素c;
D O I
暂无
中图分类号
Q26 [细胞生物化学];
学科分类号
071009 ; 090102 ;
摘要
凋亡相关蛋白中的Bcl-2家族是细胞凋亡的关键调节分子,由抗凋亡和促凋亡成员组成,这些成员之间通过相互协同作用调节了线粒体结构与功能的稳定性,从而在线粒体水平发挥着细胞凋亡的“开关”作用.抗凋亡成员大都分布于线粒体的外膜,与促凋亡成员的BH3结构域相互作用对细胞凋亡发挥抵抗作用.促凋亡成员则主要分布于细胞浆中,细胞接受死亡信号刺激后,促凋亡成员自身受到一系列的调节,如典型的Bax构象改变、BAD和Bik的磷酸化调节以及Bid和Bim的蛋白裂解效应等,使得促凋亡成员在凋亡信号的刺激下整合于线粒体外膜,最终导致线粒体通透转换孔的开放,进而释放包括细胞色素c、凋亡诱导因子、Smac等重要的凋亡因子,随后caspase被激活进而断裂重要的细胞内结构蛋白与功能分子,执行细胞凋亡.
引用
收藏
页码:221 / 225
页数:5
相关论文
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