炎症体
相扑蛋白
上睑下垂
半胱氨酸蛋白酶1
蛋白酵素
细胞生物学
化学
炎症
生物
泛素
生物化学
酶
免疫学
基因
作者
Rachael Barry,Sidonie Wicky John,Gianmaria Liccardi,Tencho Tenev,Isabel Jaco,Chih-Hong Chen,Justin Chin-Bong Choi,Paulina Kasperkiewicz,Teresa Fernandes-Alnemri,Emad S. Alnemri,Marcin Drąg,Yuan Chen,Pascal Meier
标识
DOI:10.1038/s41467-018-05321-2
摘要
The NLRP3 inflammasome responds to infection and tissue damage, and rapidly escalates the intensity of inflammation by activating interleukin (IL)-1β, IL-18 and cell death by pyroptosis. How the NLRP3 inflammasome is negatively regulated is poorly understood. Here we show that NLRP3 inflammasome activation is suppressed by sumoylation. NLRP3 is sumoylated by the SUMO E3-ligase MAPL, and stimulation-dependent NLRP3 desumoylation by the SUMO-specific proteases SENP6 and SENP7 promotes NLRP3 activation. Defective NLRP3 sumoylation, either by NLRP3 mutation of SUMO acceptor lysines or depletion of MAPL, results in enhanced caspase-1 activation and IL-1β release. Conversely, depletion of SENP7 suppresses NLRP3-dependent ASC oligomerisation, caspase-1 activation and IL-1β release. These data indicate that sumoylation of NLRP3 restrains inflammasome activation, and identify SUMO proteases as potential drug targets for the treatment of inflammatory diseases.
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