Reference : New Role For Hpar-1 Kinases Emk And C-Tak1 In Regulating Localization And Activity Of Cl...
Scientific journals : Article
Life sciences : Biochemistry, biophysics & molecular biology
http://hdl.handle.net/2268/32348
New Role For Hpar-1 Kinases Emk And C-Tak1 In Regulating Localization And Activity Of Class Iia Histone Deacetylases
English
Dequiedt, Franck mailto [Université de Liège > > Gembloux Agro-Bio Tech et GIGA-Research > > >]
Martin, Maud mailto [Université de Liège - ULg > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech >]
Von Blume, Julia [> > > >]
Vertommen, Didier [> > > >]
Lecomte, Emily [> > > >]
Mari, Nathalie [> > > >]
Heinen, Marie-France [> > > >]
Bachmann, Malte [> >]
Twizere, Jean-Claude mailto [Université de Liège - ULg > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech >]
Huang, Mei Chris [> > > >]
Rider, Mark H [> > > >]
Piwnica-Worms, Helen [> > > >]
Seufferlein, Thomas [> > > >]
Kettmann, Richard mailto [Université de Liège - ULg > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech >]
2006
Molecular and Cellular Biology
American Society for Microbiology (ASM)
26
19
7086-102
Yes (verified by ORBi)
International
0270-7306
1098-5549
Washington
DC
[en] 14-3-3 Proteins/metabolism ; Active Transport, Cell Nucleus ; Amino Acid Sequence ; Animals ; Binding Sites ; COS Cells ; Cell Nucleus/metabolism ; Cells, Cultured ; Cercopithecus aethiops ; Cytoplasm/metabolism ; Hela Cells ; Histone Deacetylases/chemistry/metabolism ; Humans ; Molecular Sequence Data ; Phosphorylation ; Phosphoserine/metabolism ; Protein Transport ; Protein-Serine-Threonine Kinases/metabolism ; Substrate Specificity
[en] Class IIa histone deacetylases (HDACs) are found both in the cytoplasm and in the nucleus where they repress genes involved in several major developmental programs. In response to specific signals, the repressive activity of class IIa HDACs is neutralized through their phosphorylation on multiple N-terminal serine residues and 14-3-3-mediated nuclear exclusion. Here, we demonstrate that class IIa HDACs are subjected to signal-independent nuclear export that relies on their constitutive phosphorylation. We identify EMK and C-TAK1, two members of the microtubule affinity-regulating kinase (MARK)/Par-1 family, as regulators of this process. We further show that EMK and C-TAK1 phosphorylate class IIa HDACs on one of their multiple 14-3-3 binding sites and alter their subcellular localization and repressive function. Using HDAC7 as a paradigm, we extend these findings by demonstrating that signal-independent phosphorylation of the most N-terminal serine residue by the MARK/Par-1 kinases, i.e., Ser155, is a prerequisite for the phosphorylation of the nearby 14-3-3 site, Ser181. We propose that this multisite hierarchical phosphorylation by a variety of kinases allows for sophisticated regulation of class IIa HDACs function.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/32348
also: http://hdl.handle.net/2268/32127
10.1128/MCB.00231-06

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