ZAKα-driven ribotoxic stress response activates the human NLRP1 inflammasome.
Science
; 377(6603): 328-335, 2022 07 15.
Article
en En
| MEDLINE
| ID: mdl-35857590
Human NLRP1 (NACHT, LRR, and PYD domain-containing protein 1) is an innate immune sensor predominantly expressed in the skin and airway epithelium. Here, we report that human NLRP1 senses the ultraviolet B (UVB)- and toxin-induced ribotoxic stress response (RSR). Biochemically, RSR leads to the direct hyperphosphorylation of a human-specific disordered linker region of NLRP1 (NLRP1DR) by MAP3K20/ZAKα kinase and its downstream effector, p38. Mutating a single ZAKα phosphorylation site in NLRP1DR abrogates UVB- and ribotoxin-driven pyroptosis in human keratinocytes. Moreover, fusing NLRP1DR to CARD8, which is insensitive to RSR by itself, creates a minimal inflammasome sensor for UVB and ribotoxins. These results provide insight into UVB sensing by human skin keratinocytes, identify several ribotoxins as NLRP1 agonists, and establish inflammasome-driven pyroptosis as an integral component of the RSR.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Ribosomas
/
Estrés Fisiológico
/
Quinasas Quinasa Quinasa PAM
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Inflamasomas
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Piroptosis
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Proteínas NLR
Límite:
Humans
Idioma:
En
Revista:
Science
Año:
2022
Tipo del documento:
Article
Pais de publicación:
Estados Unidos