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    A SWI/SNF Chromatin Remodelling Protein Controls Cytokinin Production through the Regulation of Chromatin Architecture

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    Type
    Article
    Authors
    Jégu, Teddy
    Domenichini, SéVerine
    Blein, Thomas
    Ariel, Federico
    Christ, Aurélie
    Kim, SoonKap
    Crespi, Martin
    Boutet-Mercey, Stéphanie
    Mouille, Grégory
    Bourge, Mickaël
    Hirt, Heribert cc
    Bergounioux, Catherine
    Raynaud, Cécile
    Benhamed, Moussa cc
    KAUST Department
    Biological and Environmental Science and Engineering (BESE) Division
    Center for Desert Agriculture
    Chromatin and development Research Group
    Hirt Lab
    Plant Science
    Date
    2015-10-12
    Permanent link to this record
    http://hdl.handle.net/10754/579847
    
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    Abstract
    Chromatin architecture determines transcriptional accessibility to DNA and consequently gene expression levels in response to developmental and environmental stimuli. Recently, chromatin remodelers such as SWI/SNF complexes have been recognized as key regulators of chromatin architecture. To gain insight into the function of these complexes during root development, we have analyzed Arabidopsis knock-down lines for one sub-unit of SWI/SNF complexes: BAF60. Here, we show that BAF60 is a positive regulator of root development and cell cycle progression in the root meristem via its ability to down-regulate cytokinin production. By opposing both the deposition of active histone marks and the formation of a chromatin regulatory loop, BAF60 negatively regulates two crucial target genes for cytokinin biosynthesis (IPT3 and IPT7) and one cell cycle inhibitor (KRP7). Our results demonstrate that SWI/SNF complexes containing BAF60 are key factors governing the equilibrium between formation and dissociation of a chromatin loop controlling phytohormone production and cell cycle progression.
    Citation
    A SWI/SNF Chromatin Remodelling Protein Controls Cytokinin Production through the Regulation of Chromatin Architecture 2015, 10 (10):e0138276 PLOS ONE
    Publisher
    Public Library of Science (PLoS)
    Journal
    PLoS ONE
    DOI
    10.1371/journal.pone.0138276
    PubMed ID
    26457678
    Additional Links
    http://dx.plos.org/10.1371/journal.pone.0138276
    ae974a485f413a2113503eed53cd6c53
    10.1371/journal.pone.0138276
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Center for Desert Agriculture

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