期刊
NATURE COMMUNICATIONS
卷 12, 期 1, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/s41467-021-23474-5
关键词
-
资金
- Toby Robins Research Centre [CTR-QR14-007]
- Cancer Research UK (CRUK) [CRM089X]
- NIH [AI135709]
- NHMRC [1105754, 1172929, 1124735]
- IRIISS [9000587]
- Victorian Government Operational Infrastructure Support scheme
- National Science Foundation [MCB-1852677]
- NHS
- National Health and Medical Research Council of Australia [1172929, 1124735, 1105754] Funding Source: NHMRC
Necroptosis is a form of cell death characterized by membrane rupture via MLKL oligomerization, and K219 ubiquitylation of MLKL significantly contributes to its cytotoxic potential.
Necroptosis is a form of cell death characterized by membrane rupture via MLKL oligomerization, although mechanistic details remain unclear. Here, the authors show that MLKL ubiquitylation of K219 facilitates high-order membrane assembly and subsequent rupture, promoting cytotoxicity. Necroptosis is a lytic, inflammatory form of cell death that not only contributes to pathogen clearance but can also lead to disease pathogenesis. Necroptosis is triggered by RIPK3-mediated phosphorylation of MLKL, which is thought to initiate MLKL oligomerisation, membrane translocation and membrane rupture, although the precise mechanism is incompletely understood. Here, we show that K63-linked ubiquitin chains are attached to MLKL during necroptosis and that ubiquitylation of MLKL at K219 significantly contributes to the cytotoxic potential of phosphorylated MLKL. The K219R MLKL mutation protects animals from necroptosis-induced skin damage and renders cells resistant to pathogen-induced necroptosis. Mechanistically, we show that ubiquitylation of MLKL at K219 is required for higher-order assembly of MLKL at membranes, facilitating its rupture and necroptosis. We demonstrate that K219 ubiquitylation licenses MLKL activity to induce lytic cell death, suggesting that necroptotic clearance of pathogens as well as MLKL-dependent pathologies are influenced by the ubiquitin-signalling system.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据