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Myogenic microRNA expression requires ATP-dependent chromatin remodeling enzyme function.

ABSTRACT: Knockdown of the Brg1 ATPase subunit of SWI/SNF chromatin remodeling enzymes in developing zebrafish caused stunted tail formation and altered sarcomeric actin organization, which phenocopies the loss of the microRNA processing enzyme Dicer, or the knockdown of myogenic microRNAs. Furthermore, myogenic microRNA expression and differentiation was blocked in Brg1 conditional myoblasts differentiated ex vivo. The binding of Brg1 upstream of myogenic microRNA sequences correlated with MyoD binding and accessible chromatin structure in satellite cells and myofibers, and it was required for chromatin accessibility and microRNA expression in a tissue culture model for myogenesis. The results implicate ATP-dependent chromatin remodelers in myogenic microRNA gene regulation.

SUBMITTER: Mallappa C

PROVIDER: S-EPMC2897572 | biostudies-literature | 2010 Jul

REPOSITORIES: biostudies-literature

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Myogenic microRNA expression requires ATP-dependent chromatin remodeling enzyme function.

Mallappa Chandrashekara C Nasipak Brian T BT Etheridge Letitiah L Androphy Elliot J EJ Jones Stephen N SN Sagerström Charles G CG Ohkawa Yasuyuki Y Imbalzano Anthony N AN

Molecular and cellular biology 20100426 13

Knockdown of the Brg1 ATPase subunit of SWI/SNF chromatin remodeling enzymes in developing zebrafish caused stunted tail formation and altered sarcomeric actin organization, which phenocopies the loss of the microRNA processing enzyme Dicer, or the knockdown of myogenic microRNAs. Furthermore, myogenic microRNA expression and differentiation was blocked in Brg1 conditional myoblasts differentiated ex vivo. The binding of Brg1 upstream of myogenic microRNA sequences correlated with MyoD binding a ...[more]

PMID: 20421421

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