Article (Scientific journals)
Lipopolysaccharide-mediated interferon regulatory factor activation involves TBK1-IKK epsilon-dependent lys(63)-linked polyubiquitination and phosphorylation of TANK/I-TRAF
GATOT, Jean-Stéphane; Gioia, Romain; Chau, Tieu-Lan et al.
2007In Journal of Biological Chemistry, 282 (43), p. 31131-31146
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Abstract :
[en] Type I interferon gene induction relies on IKK-related kinase TBK1 and IKK epsilon-mediated phosphorylations of IRF3/7 through the Toll-like receptor-dependent signaling pathways. The scaffold proteins that assemble these kinase complexes are poorly characterized. We show here that TANK/ITRAF is required for the TBK1- and IKK epsilon-mediated IRF3/7 phosphorylations through some Toll-like receptor-dependent pathways and is part of a TRAF3-containing complex. Moreover, TANK is dispensable for the early phase of double-stranded RNA-mediated IRF3 phosphorylation. Interestingly, TANK is heavily phosphorylated by TBK1-IKK epsilon upon lipopolysaccharide stimulation and is also subject to lipopolysaccharide- and TBK1-IKK epsilon-mediated Lys(63)-linked polyubiquitination, a mechanism that does not require TBK1-IKK epsilon kinase activity. Thus, we have identified TANK as a scaffold protein that assembles some but not all IRF3/7-phosphorylating TBK1-IKK epsilon complexes and demonstrated that these kinases possess two functions, namely the phosphorylation of both IRF3/7 and TANK as well as the recruitment of an E3 ligase for Lys63-linked polyubiquitination of their scaffold protein, TANK.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
GATOT, Jean-Stéphane ;  Free University of Brussels > Institute of Molecular Biology and Medicine > Dept. of Applied Genetics
Gioia, Romain ;  Université de Liège - ULiège > Chimie médicale
Chau, Tieu-Lan ;  Université de Liège - ULiège > Département de pharmacie > Chimie médicale
Patrascu, Felicia Alina ;  Université de Liège - ULiège > Chimie médicale
Warnier, Michael
Close, Pierre  ;  Université de Liège - ULiège > Département de pharmacie > Chimie médicale
Chapelle, Jean-Paul ;  Université de Liège - ULiège > Département de pharmacie > Chimie médicale
Muraille, Eric
Brown, Keith
Siebenlist, Ulrich
Piette, Jacques ;  Université de Liège - ULiège > Département des sciences de la vie > Virologie - Immunologie
Dejardin, Emmanuel ;  Université de Liège - ULiège > Virologie - Immunologie
Chariot, Alain ;  Université de Liège - ULiège > Département de pharmacie > Chimie médicale
More authors (3 more) Less
Language :
English
Title :
Lipopolysaccharide-mediated interferon regulatory factor activation involves TBK1-IKK epsilon-dependent lys(63)-linked polyubiquitination and phosphorylation of TANK/I-TRAF
Alternative titles :
[fr] Une stimulation des macrophages par le LPS induit une phosphorylation et une polyubiquitination de la protéine d'assemblage TANK/I-TRAF
Publication date :
26 October 2007
Journal title :
Journal of Biological Chemistry
ISSN :
0021-9258
eISSN :
1083-351X
Publisher :
American Society for Biochemistry and Molecular Biology, Baltimore, United States - Maryland
Volume :
282
Issue :
43
Pages :
31131-31146
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 06 January 2009

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