Caspase-2 Substrates: To Apoptosis, Cell Cycle Control, and Beyond.

Caspase-2 Substrates: To Apoptosis, Cell Cycle Control, and Beyond.
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DOI:
10.3389/fcell.2020.610022
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发表时间:
2020
影响因子:
5.5
通讯作者:
Bouchier-Hayes L
Bouchier-Hayes L
中科院分区:
生物学2区
文献类型:
--
作者:
Brown-Suedel AN;Bouchier-Hayes L

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caspase -2属于caspase家族,该家族的蛋白质负责细胞的基本功能,包括凋亡和炎症。独特的是,caspase-2已被确定为肿瘤抑制因子,但它如何调节这种功能仍然未知。多年来,caspase-2一直被认为是一种“孤儿”caspase,因为尽管它能够诱导细胞凋亡,但有大量相互矛盾的证据质疑它对细胞凋亡的必要性。最近的证据支持caspase-2在细胞周期和保护基因组不稳定性中具有非凋亡功能。目前尚不清楚caspase-2如何调节这些相反的功能,这使得caspase-2抑制肿瘤的机制难以确定。作为一种蛋白酶,caspase-2可能通过蛋白水解裂解细胞底物来发挥其功能。这篇综述强调了已知的caspase-2底物,特别关注它们与caspase-2作为肿瘤抑制因子作用的功能相关性。
Caspase-2 belongs to the caspase family of proteins responsible for essential cellular functions including apoptosis and inflammation. Uniquely, caspase-2 has been identified as a tumor suppressor, but how it regulates this function is still unknown. For many years, caspase-2 has been considered an “orphan” caspase because, although it is able to induce apoptosis, there is an abundance of conflicting evidence that questions its necessity for apoptosis. Recent evidence supports that caspase-2 has non-apoptotic functions in the cell cycle and protection from genomic instability. It is unclear how caspase-2 regulates these opposing functions, which has made the mechanism of tumor suppression by caspase-2 difficult to determine. As a protease, caspase-2 likely exerts its functions by proteolytic cleavage of cellular substrates. This review highlights the known substrates of caspase-2 with a special focus on their functional relevance to caspase-2’s role as a tumor suppressor.
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