Abstract:
:Necroptosis is a type of programmed cell death with great significance in many pathological processes. Tumour necrosis factor-α(TNF), a proinflammatory cytokine, is a prototypic trigger of necroptosis. It is known that mitochondrial reactive oxygen species (ROS) promote necroptosis, and that kinase activity of receptor interacting protein 1 (RIP1) is required for TNF-induced necroptosis. However, how ROS function and what RIP1 phosphorylates to promote necroptosis are largely unknown. Here we show that three crucial cysteines in RIP1 are required for sensing ROS, and ROS subsequently activates RIP1 autophosphorylation on serine residue 161 (S161). The major function of RIP1 kinase activity in TNF-induced necroptosis is to autophosphorylate S161. This specific phosphorylation then enables RIP1 to recruit RIP3 and form a functional necrosome, a central controller of necroptosis. Since ROS induction is known to require necrosomal RIP3, ROS therefore function in a positive feedback circuit that ensures effective induction of necroptosis.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Zhang Y,Su SS,Zhao S,Yang Z,Zhong CQ,Chen X,Cai Q,Yang ZH,Huang D,Wu R,Han Jdoi
10.1038/ncomms14329subject
Has Abstractpub_date
2017-02-08 00:00:00pages
14329issn
2041-1723pii
ncomms14329journal_volume
8pub_type
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