Article (Scientific journals)
The homeodomain transcription factor Hoxa2 interacts with and promotes the proteasomal degradation of the E3 ubiquitin protein ligase RCHY1.
Bergiers, Isabelle; Bridoux, Laure; Nguyen, Nathan et al.
2013In PLoS ONE, 8 (11), p. 80387
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Abstract :
[en] Hox proteins are conserved homeodomain transcription factors known to be crucial regulators of animal development. As transcription factors, the functions and modes of action (co-factors, target genes) of Hox proteins have been very well studied in a multitude of animal models. However, a handful of reports established that Hox proteins may display molecular activities distinct from gene transcription regulation. Here, we reveal that Hoxa2 interacts with 20S proteasome subunits and RCHY1 (also known as PIRH2), an E3 ubiquitin ligase that targets p53 for degradation. We further show that Hoxa2 promotes proteasome-dependent degradation of RCHY1 in an ubiquitin-independent manner. Correlatively, Hoxa2 alters the RCHY1-mediated ubiquitination of p53 and promotes p53 stabilization. Together, our data establish that Hoxa2 can regulate the proteasomal degradation of RCHY1 and stabilization of p53.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Bergiers, Isabelle
Bridoux, Laure
Nguyen, Nathan
Twizere, Jean-Claude  ;  Université de Liège - ULiège > Chimie et bio-industries > Biologie cell. et moléc.
Rezsohazy, Rene
Language :
English
Title :
The homeodomain transcription factor Hoxa2 interacts with and promotes the proteasomal degradation of the E3 ubiquitin protein ligase RCHY1.
Publication date :
2013
Journal title :
PLoS ONE
eISSN :
1932-6203
Publisher :
Public Library of Science, United States - California
Volume :
8
Issue :
11
Pages :
e80387
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 05 March 2014

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