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Selective repression of MEF2 activity by PKA-dependent proteolysis of HDAC4

Histone deacetylase 4 (HDAC4) regulates numerous gene expression programs through its signal-dependent repression of myocyte enhancer factor 2 (MEF2) and serum response factor (SRF) transcription factors. In cardiomyocytes, calcium/calmodulin-dependent protein kinase II (CaMKII) signaling promotes h...

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Main Authors: Backs, Johannes (Author) , Worst, Barbara C. (Author) , Lehmann, Lorenz (Author) , Patrick, David M. (Author) , Jebessa, Zegeye Hailu (Author) , Kreußer, Michael (Author) , Sun, Qiang (Author) , Chen, Lan (Author) , Heft, Claudia (Author) , Katus, Hugo (Author) , Olson, Eric N. (Author)
Format: Article (Journal)
Language:English
Published: October 31 2011
In: The journal of cell biology
Year: 2011, Volume: 195, Issue: 3, Pages: 403-415
ISSN:1540-8140
DOI:10.1083/jcb.201105063
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1083/jcb.201105063
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Author Notes:Johannes Backs, Barbara C. Worst, Lorenz H. Lehmann, David M. Patrick, Zegeye Jebessa, Michael M. Kreusser, Qiang Sun, Lan Chen, Claudia Heft, Hugo A. Katus, and Eric N. Olson
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Summary:Histone deacetylase 4 (HDAC4) regulates numerous gene expression programs through its signal-dependent repression of myocyte enhancer factor 2 (MEF2) and serum response factor (SRF) transcription factors. In cardiomyocytes, calcium/calmodulin-dependent protein kinase II (CaMKII) signaling promotes hypertrophy and pathological remodeling, at least in part by phosphorylating HDAC4, with consequent stimulation of MEF2 activity. In this paper, we describe a novel mechanism whereby protein kinase A (PKA) overcomes CaMKII-mediated activation of MEF2 by regulated proteolysis of HDAC4. PKA induces the generation of an N-terminal HDAC4 cleavage product (HDAC4-NT). HDAC4-NT selectively inhibits activity of MEF2 but not SRF, thereby antagonizing the prohypertrophic actions of CaMKII signaling without affecting cardiomyocyte survival. Thus, HDAC4 functions as a molecular nexus for the antagonistic actions of the CaMKII and PKA pathways. These findings have implications for understanding the molecular basis of cardioprotection and other cellular processes in which CaMKII and PKA exert opposing effects.
Item Description:Gesehen am 25.03.2022
Physical Description:Online Resource
ISSN:1540-8140
DOI:10.1083/jcb.201105063

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