Association of the Mediator complex with enhancers of active genes.

  • Kuras L
  • Borggrefe T
  • Kornberg R
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Abstract

The multiprotein Mediator complex has been shown to interact with gene-specific regulatory proteins and RNA polymerase II in vitro. Here, we use chromatin immunoprecipitation to analyze the recruitment of Mediator to GAL genes of yeast in vivo. We find that Mediator associates exclusively with transcriptionally active and not inactive GAL genes. This association maps to the upstream activating sequence, rather than the core promoter, and is independent of RNA polymerase II, general transcription factors, and core promoter sequences. These findings support the idea of Mediator as a primary conduit of regulatory information from enhancers to promoters in eukaryotic cells.

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Authors

  • Laurent Kuras

  • Tilman Borggrefe

  • Roger D Kornberg

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