NEK7 activates the NLRP1 Inflammasome
Muela-Zarzuela, I.; Gallardo-Orihuela, A.; Pino-Angeles, A.; Suarez-Rivero, J. M.; Boy-Ruiz, D.; de Gregorio-Procopio, M.; Oroz, J.; Mbalaviele, G.; Cordero, M. D.
Show abstract
Inflammasomes including those assembled by NLRP1 and NLRP3 regulate the innate immune system by inducing interleukin (IL)-1{beta} and IL-18 maturation. Inflammasomes are functionally regulated by post-translational modifications such as phosphorylation. The current paradigm posits that NEK7 is the essential and seletive activator of NLRP3; whether this kinase interacts with NLRP3 structurally-related member, NLRP1, has never been explored. Here, we find that NEK7 binds to NLRP1 and promotes its activation independently of NLRP3. IL-1{beta} maturation induced by NLRP1 or NLRP3 inflammasome activators, but not those of the NLRC4 or AIM2 inflammasome is impared in Nek7 deficient cells. This discovery expands the spectrum of NEK7 actions in the regulation of inflammasome pathways.
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