Conserved RNA polymerase II initiation complex structure
- PMID: 28437704
- DOI: 10.1016/j.sbi.2017.03.013
Conserved RNA polymerase II initiation complex structure
Abstract
Recent cryo-electron microscopic studies have arrived at atomic models of the core transcription initiation complex comprising RNA polymerase (Pol) II and the basal transcription factors TBP, TFIIA, TFIIB, TFIIE, and TFIIF. A detailed comparison of two independently derived yeast and human core initiation complex structures reveals that they are virtually identical, demonstrating the conservation of the basic transcription machinery amongst eukaryotes. The additional factors TFIID, TFIIH, and Mediator have been located on the periphery of the core initiation complex, providing the topology of the entire initiation assembly, which comprises approximately 70 polypeptides with a molecular weight of ∼4 Megadalton.
Copyright © 2017 Elsevier Ltd. All rights reserved.
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