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. 1995 Nov 21;92(24):10864-8.
doi: 10.1073/pnas.92.24.10864.

Yeast global transcriptional regulators Sin4 and Rgr1 are components of mediator complex/RNA polymerase II holoenzyme

Y Li  1 , S Bjorklund, Y W Jiang, Y J Kim, W S Lane, D J Stillman, R D Kornberg
Affiliations

Yeast global transcriptional regulators Sin4 and Rgr1 are components of mediator complex/RNA polymerase II holoenzyme

Y Li et al. Proc Natl Acad Sci U S A. .

Abstract

Sin4 and Rgr1 proteins, previously shown by genetic studies to play both positive and negative roles in the transcriptional regulation of many genes, are identified here as components of mediator and RNA polymerase II holoenzyme complexes. Results with Sin4 deletion and Rgr1 truncation strains indicate the association of these proteins in a subcomplex comprising Sin4, Rgr1, Gal11, and a 50-kDa polypeptide. Taken together with the previous genetic evidence, our findings point to a role of the mediator in repression as well as in transcriptional activation.

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