TFIIB is only∗9 Å away from the 5'-end of a trimeric rna primer in a functional RNA polymerase II preinitiation complex

Document Type

Article

Publication Date

3-16-2015

Abstract

Recent X-ray crystallographic studies of Pol II in complex with the general transcription factor (GTF) IIB have begun to provide insights into the mechanism of transcription initiation. These structures have also shed light on the architecture of the transcription preinitiation complex (PIC). However, structural characterization of a functional PIC is still lacking, and even the topological arrangement of the GTFs in the Pol II complex is a matter of contention. We have extended our activity-based affinity crosslinking studies, initially developed to investigate the interaction of bacterial RNA polymerase with s, to the eukaryotic transcription machinery. Towards that end, we sought to identify GTFs that are within the Pol II active site in a functioning PIC. We provide biochemical evidence that TFIIB is located within∗9 Å of the -2 site of promoter DNA, where it is positioned to play a role in de novo transcription initiation.

Identifier

84925238084 (Scopus)

Publication Title

Plos One

External Full Text Location

https://doi.org/10.1371/journal.pone.0119007

e-ISSN

19326203

PubMed ID

25774659

Issue

3

Volume

10

Grant

GM081697

Fund Ref

National Institute of General Medical Sciences

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