Biology:Endogenous mediator

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Endogenous mediators are intracellular proteins that enhance and activate the functions of other proteins. This term is commonly used in molecular biology, cell biology and in pharmacology to describe a specific protein complex that acts in transcription as a coactivator. This Mediator complex is located within the cell nucleus. The Mediator complex is required for the successful transcription of nearly all class II gene promoters in yeast.[1] It works in the same manner in mammals. The mediator functions as a coactivator and binds to the C-terminal domain of RNA polymerase II holoenzyme, acting as a bridge between this enzyme and transcription factors.[2]

References

  1. "Yeast mediator and its role in transcriptional regulation". Comptes Rendus Biologies 328 (9): 773–82. September 2005. doi:10.1016/j.crvi.2005.03.004. PMID 16168358. 
  2. "The yeast Mediator complex and its regulation". Trends in Biochemical Sciences 30 (5): 240–4. May 2005. doi:10.1016/j.tibs.2005.03.008. PMID 15896741.