- EMDB-8772: Core Factor local refinement from Pol I Initial Transcribing Comp... -
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基本情報
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データベース: EMDB / ID: EMD-8772
タイトル
Core Factor local refinement from Pol I Initial Transcribing Complex at 4.2 angstrom
マップデータ
Core Factor local refinement from Pol I Initial Transcribing Complex
試料
複合体: Yeast Core Factor
タンパク質・ペプチド: Rrn7
タンパク質・ペプチド: Rrn11
タンパク質・ペプチド: Rrn6
DNA: non-template strand DNA
DNA: template DNA
機能・相同性
機能・相同性情報
RNA polymerase I transcription regulatory region sequence-specific DNA binding / RNA polymerase I core factor complex / RNA polymerase I general transcription initiation factor activity / RNA polymerase I general transcription initiation factor binding / RNA polymerase I core promoter sequence-specific DNA binding / RNA Polymerase I Promoter Escape / transcription initiation at RNA polymerase I promoter / nucleolar large rRNA transcription by RNA polymerase I / TBP-class protein binding / nucleolus ...RNA polymerase I transcription regulatory region sequence-specific DNA binding / RNA polymerase I core factor complex / RNA polymerase I general transcription initiation factor activity / RNA polymerase I general transcription initiation factor binding / RNA polymerase I core promoter sequence-specific DNA binding / RNA Polymerase I Promoter Escape / transcription initiation at RNA polymerase I promoter / nucleolar large rRNA transcription by RNA polymerase I / TBP-class protein binding / nucleolus / zinc ion binding / nucleus / cytoplasm 類似検索 - 分子機能
National Institutes of Health/National Cancer Institute (NIH/NCI)
NCI 5K22CA184235
米国
American Cancer Society
IRG-15-173-21
米国
National Science Foundation (NSF, United States)
MCB-1149521
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
NIGMS GM110387
米国
引用
ジャーナル: Elife / 年: 2017 タイトル: Structural mechanism of ATP-independent transcription initiation by RNA polymerase I. 著者: Yan Han / Chunli Yan / Thi Hoang Duong Nguyen / Ashleigh J Jackobel / Ivaylo Ivanov / Bruce A Knutson / Yuan He / 要旨: Transcription initiation by RNA Polymerase I (Pol I) depends on the Core Factor (CF) complex to recognize the upstream promoter and assemble into a Pre-Initiation Complex (PIC). Here, we solve a ...Transcription initiation by RNA Polymerase I (Pol I) depends on the Core Factor (CF) complex to recognize the upstream promoter and assemble into a Pre-Initiation Complex (PIC). Here, we solve a structure of Pol I-CF-DNA to 3.8 Å resolution using single-particle cryo-electron microscopy. The structure reveals a bipartite architecture of Core Factor and its recognition of the promoter from -27 to -16. Core Factor's intrinsic mobility correlates well with different conformational states of the Pol I cleft, in addition to the stabilization of either Rrn7 N-terminal domain near Pol I wall or the tandem winged helix domain of A49 at a partially overlapping location. Comparison of the three states in this study with the Pol II system suggests that a ratchet motion of the Core Factor-DNA sub-complex at upstream facilitates promoter melting in an ATP-independent manner, distinct from a DNA translocase actively threading the downstream DNA in the Pol II PIC.