Target gene-specific modulation of myocardin activity by GATA transcription factors

Jiyeon Oh, Zhigao Wang, Da Zhi Wang, Ching Ling Lien, Weibing Xing, Eric N. Olson

Research output: Contribution to journalArticlepeer-review

35 Scopus citations


Myocardin is a transcriptional coactivator that regulates cardiac and smooth muscle gene expression by associating with serum response factor. We show that GATA transcription factors can either stimulate or suppress the transcriptional activity of myocardin, depending on the target gene. Modulation of myocardin activity by GATA4 is mediated by the physical interaction of myocardin with the DNA binding domain of GATA4 but does not require binding of GATA4 to DNA. Paradoxically, the transcription activation domain of GATA4 is dispensable for the stimulatory effect of GATA4 on myocardin activity but is required for repression of myocardin activity. The ability of GATA transcription factors to modulate myocardin activity provides a potential mechanism for fine tuning the expression of serum response factor target genes in a gene-specific manner.

Original languageEnglish (US)
Pages (from-to)8519-8528
Number of pages10
JournalMolecular and cellular biology
Issue number19
StatePublished - Oct 2004

ASJC Scopus subject areas

  • Molecular Biology
  • Cell Biology


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