Article (Scientific journals)
New Role For Hpar-1 Kinases Emk And C-Tak1 In Regulating Localization And Activity Of Class Iia Histone Deacetylases
Dequiedt, Franck; Martin, Maud; Von Blume, Julia et al.
2006In Molecular and Cellular Biology, 26 (19), p. 7086-7102
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Keywords :
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
Abstract :
[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.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Dequiedt, Franck  ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech et GIGA-Research
Martin, Maud ;  Université de Liège - ULiège > 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  ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech
Huang, Mei Chris
Rider, Mark H
Piwnica-Worms, Helen
Seufferlein, Thomas
Kettmann, Richard ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech
More authors (4 more) Less
Language :
English
Title :
New Role For Hpar-1 Kinases Emk And C-Tak1 In Regulating Localization And Activity Of Class Iia Histone Deacetylases
Publication date :
2006
Journal title :
Molecular and Cellular Biology
ISSN :
0270-7306
eISSN :
1098-5549
Publisher :
American Society for Microbiology (ASM), Washington, United States - District of Columbia
Volume :
26
Issue :
19
Pages :
7086-7102
7086-102
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 09 December 2009

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