[HTML][HTML] Pellino proteins are more than scaffold proteins in TLR/IL-1R signalling: A role as novel RING E3–ubiquitin-ligases
R Schauvliege, S Janssens, R Beyaert - FEBS letters, 2006 - Elsevier
R Schauvliege, S Janssens, R Beyaert
FEBS letters, 2006•ElsevierMembers of the Toll-like receptor (TLR) and IL-1 receptor (IL-1R) family initiate signalling
pathways that shape innate immunity. Pellino proteins have recently been implicated as
evolutionary conserved scaffold proteins in TLR/IL-1R signalling leading to nuclear factor-κB
and mitogen activated protein kinase-dependent gene expression. We found that Pellino
proteins contain a new RING-like motif. Because RING motifs are a feature of a subclass of
E3–ubiquitin-ligases that target specific proteins for ubiquitination, we suggest that Pellino …
pathways that shape innate immunity. Pellino proteins have recently been implicated as
evolutionary conserved scaffold proteins in TLR/IL-1R signalling leading to nuclear factor-κB
and mitogen activated protein kinase-dependent gene expression. We found that Pellino
proteins contain a new RING-like motif. Because RING motifs are a feature of a subclass of
E3–ubiquitin-ligases that target specific proteins for ubiquitination, we suggest that Pellino …
Members of the Toll-like receptor (TLR) and IL-1 receptor (IL-1R) family initiate signalling pathways that shape innate immunity. Pellino proteins have recently been implicated as evolutionary conserved scaffold proteins in TLR/IL-1R signalling leading to nuclear factor-κB and mitogen activated protein kinase-dependent gene expression. We found that Pellino proteins contain a new RING-like motif. Because RING motifs are a feature of a subclass of E3–ubiquitin-ligases that target specific proteins for ubiquitination, we suggest that Pellino proteins are involved in TLR/IL-1R signalling not only as scaffold proteins but also as RING E3–ubiquitin-ligases. In support of this hypothesis we show that Pellino proteins induce IRAK-1 polyubiquitination in a RING-dependent manner. We further propose a model in which Pellino-mediated IRAK-1 polyubiquitination regulates TLR/IL-1R signalling.
Elsevier