State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, School of Marine Sciences, Ningbo University, Ningbo 315211, P.R. China; Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Ningbo University, Ningbo 315211, P.R. China; Key Laboratory of Aquacultural Biotechnology of Ministry of Education, Ningbo University, Ningbo 315211, P.R. China.
State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, School of Marine Sciences, Ningbo University, Ningbo 315211, P.R. China; Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Ningbo University, Ningbo 315211, P.R. China; Key Laboratory of Aquacultural Biotechnology of Ministry of Education, Ningbo University, Ningbo 315211, P.R. China.
Mol Cell. 2024 Sep 5;84(17):3336-3353.e7. doi: 10.1016/j.molcel.2024.08.001. Epub 2024 Aug 21.
NLRP3 inflammasome activation, essential for cytokine secretion and pyroptosis in response to diverse stimuli, is closely associated with various diseases. Upon stimulation, NLRP3 undergoes subcellular membrane trafficking and conformational rearrangements, preparing itself for inflammasome assembly at the microtubule-organizing center (MTOC). Here, we elucidate an orchestrated mechanism underlying these ordered processes using human and murine cells. Specifically, NLRP3 undergoes palmitoylation at two sites by palmitoyl transferase zDHHC1, facilitating its trafficking between subcellular membranes, including the mitochondria, trans-Golgi network (TGN), and endosome. This dynamic trafficking culminates in the localization of NLRP3 to the MTOC, where LATS1/2, pre-recruited to MTOC during priming, phosphorylates NLRP3 to further facilitate its interaction with NIMA-related kinase 7 (NEK7), ultimately leading to full NLRP3 activation. Consistently, Zdhhc1-deficiency mitigated LPS-induced inflammation and conferred protection against mortality in mice. Altogether, our findings provide valuable insights into the regulation of NLRP3 membrane trafficking and inflammasome activation, governed by palmitoylation and phosphorylation events.
NLRP3 炎性小体的激活对于应对各种刺激的细胞因子分泌和细胞焦亡至关重要,与各种疾病密切相关。在受到刺激后,NLRP3 会经历亚细胞膜转运和构象重排,为在微管组织中心(MTOC)组装炎性小体做准备。在这里,我们使用人和鼠细胞阐明了这些有序过程背后的协调机制。具体来说,NLRP3 通过棕榈酰转移酶 zDHHC1 在两个位点发生棕榈酰化,促进其在包括线粒体、高尔基体网络(TGN)和内体在内的亚细胞膜之间的转运。这种动态转运最终导致 NLRP3 定位到 MTOC,在那里,在初始阶段预先募集到 MTOC 的 LATS1/2 磷酸化 NLRP3,以进一步促进其与丝氨酸/苏氨酸激酶相关激酶 7(NEK7)的相互作用,最终导致 NLRP3 完全激活。一致地,Zdhhc1 缺陷减轻了 LPS 诱导的炎症,并在小鼠中提供了对死亡率的保护。总之,我们的发现为 NLRP3 膜转运和炎性小体激活的调控提供了有价值的见解,受棕榈酰化和磷酸化事件的调控。
Cell Rep. 2024-4-23
Nat Commun. 2021-10-6
J Hematol Oncol. 2025-9-1
Cell Mol Biol Lett. 2025-8-15
Innovation (Camb). 2025-4-29
Biochem Soc Trans. 2025-7-4
Pediatr Res. 2025-6-5
Cell Mol Immunol. 2025-4-30