Decreased linear ubiquitination of NEMO and FADD on apoptosis with caspase-mediated cleavage of HOIP.
Biochem Biophys Res Commun
; 485(1): 152-159, 2017 03 25.
Article
en En
| MEDLINE
| ID: mdl-28189684
ABSTRACT
NF-κB is crucial to regulate immune and inflammatory responses and cell survival. LUBAC generates a linear ubiquitin chain and activates NF-κB through ubiquitin ligase (E3) activity in the HOIP subunit. Here, we show that HOIP is predominantly cleaved by caspase at Asp390 upon apoptosis, and that is subjected to proteasomal degradation. We identified that FADD, as well as NEMO, is a substrate for LUBAC. Although the C-terminal fragment of HOIP retains NF-κB activity, linear ubiquitination of NEMO and FADD decreases upon apoptosis. Moreover, the N-terminal fragment of HOIP binds with deubiquitinases, such as OTULIN and CYLD-SPATA2. These results indicate that caspase-mediated cleavage of HOIP divides critical functional regions of HOIP, and that this regulates linear (de)ubiquitination of substrates upon apoptosis.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Apoptosis
/
Caspasas
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Ubiquitina-Proteína Ligasas
/
Quinasa I-kappa B
/
Proteína de Dominio de Muerte Asociada a Fas
/
Ubiquitinación
Tipo de estudio:
Prognostic_studies
Límite:
Humans
Idioma:
En
Revista:
Biochem Biophys Res Commun
Año:
2017
Tipo del documento:
Article
País de afiliación:
Japón