Initiator caspases in apoptosis signaling pathways

Initiator caspases in apoptosis signaling pathways
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DOI:
10.1023/a:1016167228059
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发表时间:
2002-08-01
期刊:
影响因子:
7.2
通讯作者:
Wang, J
Wang, J
中科院分区:
生物学2区
文献类型:
--
作者:
Chen, M;Wang, J

文献摘要

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死亡受体依赖型或线粒体依赖型细胞凋亡是由细胞凋亡信号通路中顶端胱天蛋白酶的募集和激活所引发的。在死亡受体介导的细胞凋亡中,死亡受体的结合会导致死亡诱导信号复合物(DISC)的形成,该复合物包含死亡受体、衔接蛋白、胱天蛋白酶 - 8和胱天蛋白酶 - 10。在线粒体依赖型细胞凋亡中,细胞色素C释放到细胞质中会导致包含细胞色素C、凋亡蛋白酶激活因子 - 1(Apaf - 1)和胱天蛋白酶 - 9的凋亡小体形成。胱天蛋白酶 - 8、胱天蛋白酶 - 10和胱天蛋白酶 - 9被认为是胱天蛋白酶信号级联顶端的起始胱天蛋白酶。胱天蛋白酶被募集到DISC和凋亡小体后,通过二聚体形成而被激活。最近对DISC和凋亡小体成分的生化和结构分析为它们在诱导细胞凋亡信号起始中的作用提供了新的见解。
Death receptor- or mitochondrion-dependent apoptosis is initiated by the recruitment and activation of apical caspases in the apoptosis signaling pathways. In death receptor- mediated apoptosis, engagement of death receptors leads to the formation of the death-inducing signaling complex (DISC) containing the death receptors, adaptor proteins, caspase-8 and caspase-10. In mitochondrion-dependent apoptosis, release of cytochrome C into the cytosol results in the formation of apoptosome containing cytochrome C, Apaf-1 and caspase-9. Caspase-8, caspase-10 and caspase-9 are believed to be the initiator caspases at the top of the caspase signaling cascade. Recruitment of caspases to DISC and apoptosome leads to their activation by dimer formation. Recent biochemical and structural analyses of components in the DISC and apoptosome shed new lights on their roles in inducing the onset of apoptosis signaling.