Background: Two CDK subunits of the Mediator complex play pivotal roles in transcription by a mechanism that has not yet been elucidated. Results: The histone arginine methyltransferase PRMT5 is a Mediator CDK-interacting protein.
Conclusion:Mediator-associated PRMT5 symmetrically dimethylates histone H4 arginine 3, and this might cause transcriptional repression. Significance: This work enables further exploration of Mediator functions in transcriptional repression.
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