A conserved Mediator-CDK8 kinase module association regulates Mediator-RNA polymerase II interaction.
2013
The CDK8 kinase module (CKM) is a subcomplex that interacts with Mediator and represses transcription. Structural and biochemical analyses now show that interaction of the CKM with Mediator interferes with C-terminal domain–dependent binding of RNA polymerase II to a previously unknown Mediator binding site and with holoenzyme formation, which forms the basis for CKM's repressive effect on transcription.
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