TRIM11 binds to and destabilizes a key component of the activator-mediated cofactor complex (ARC105) through the ubiquitin-proteasome system.
TRIM11 is a member of the tripartite-motif-containing protein family and is known to destabilize humanin, an inhibitor of Alzheimer-like neuronal insults. In this study, we demonstrate that TRIM11 interacts with activator-recruited cofactor 105-kDa component (ARC105) that mediates chromatin-directed transcription activation and is a key regulatory factor for transforming growth factor ... beta (TGFbeta) signaling. Co-expression of TRIM11 increased ARC105 degradation but a proteasome inhibitor suppressed this. Co-expression of TRIM11 and ARC105 also increased ubiquitination of ARC105. In addition, TRIM11 suppressed ARC105-mediated transcriptional activation induced with TGFbeta in a reporter assay. These results suggest that TRIM11, with the ubiquitin-proteasome pathway, regulates ARC105 function in TGFbeta signaling.
Mesh Terms:
Animals, Carrier Proteins, Cell Line, Genes, Reporter, Humans, Mediator Complex, Proteasome Endopeptidase Complex, Recombinant Fusion Proteins, Signal Transduction, Transcription Factors, Transcriptional Activation, Transforming Growth Factor beta, Ubiquitin, Ubiquitin-Protein Ligases
Animals, Carrier Proteins, Cell Line, Genes, Reporter, Humans, Mediator Complex, Proteasome Endopeptidase Complex, Recombinant Fusion Proteins, Signal Transduction, Transcription Factors, Transcriptional Activation, Transforming Growth Factor beta, Ubiquitin, Ubiquitin-Protein Ligases
FEBS Lett.
Date: Sep. 04, 2006
PubMed ID: 16904669
View in: Pubmed Google Scholar
Download Curated Data For This Publication
100736
Switch View:
- Interactions 3
- PTM Genes 1