TRIM30 alpha negatively regulates TLR-mediated NF-kappa B activation by targeting TAB2 and TAB3 for degradation.
Nat Immunol
; 9(4): 369-77, 2008 Apr.
Article
en En
| MEDLINE
| ID: mdl-18345001
ABSTRACT
Toll-like receptor (TLR) signaling is pivotal to innate and adaptive immune responses and must be tightly controlled. The mechanisms of TLR signaling have been the focus of extensive studies. Here we report that the tripartite-motif protein TRIM30alpha, a RING protein, was induced by TLR agonists and interacted with the TAB2-TAB3-TAK1 adaptor-kinase complex involved in the activation of transcription factor NF-kappaB. TRIM30alpha promoted the degradation of TAB2 and TAB3 and inhibited NF-kappaB activation induced by TLR signaling. In vivo studies showed that transfected or transgenic mice overexpressing TRIM30alpha were more resistant to endotoxic shock. Consistent with that, in vivo 'knockdown' of TRIM30alpha mRNA by small interfering RNA impaired lipopolysaccharide-induced tolerance. Finally, expression of TRIM30alpha depended on NF-kappaB activation. Our results collectively indicate that TRIM30alpha negatively regulates TLR-mediated NF-kappaB activation by targeting degradation of TAB2 and TAB3 by a 'feedback' mechanism.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
FN-kappa B
/
Péptidos y Proteínas de Señalización Intracelular
/
Proteínas Adaptadoras Transductoras de Señales
/
Receptores Toll-Like
Límite:
Animals
/
Female
/
Humans
Idioma:
En
Revista:
Nat Immunol
Asunto de la revista:
ALERGIA E IMUNOLOGIA
Año:
2008
Tipo del documento:
Article
País de afiliación:
China