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-Structure paper
タイトル | Structural basis of bacterial transcription activation. |
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ジャーナル・号・ページ | Science, Vol. 358, Issue 6365, Page 947-951, Year 2017 |
掲載日 | 2017年11月17日 |
著者 | Bin Liu / Chuan Hong / Rick K Huang / Zhiheng Yu / Thomas A Steitz / |
PubMed 要旨 | In bacteria, the activation of gene transcription at many promoters is simple and only involves a single activator. The cyclic adenosine 3',5'-monophosphate receptor protein (CAP), a classic ...In bacteria, the activation of gene transcription at many promoters is simple and only involves a single activator. The cyclic adenosine 3',5'-monophosphate receptor protein (CAP), a classic activator, is able to activate transcription independently through two different mechanisms. Understanding the class I mechanism requires an intact transcription activation complex (TAC) structure at a high resolution. Here we report a high-resolution cryo-electron microscopy structure of an intact class I TAC containing a CAP dimer, a σ-RNA polymerase (RNAP) holoenzyme, a complete class I CAP-dependent promoter DNA, and a de novo synthesized RNA oligonucleotide. The structure shows how CAP wraps the upstream DNA and how the interactions recruit RNAP. Our study provides a structural basis for understanding how activators activate transcription through the class I recruitment mechanism. |
リンク | Science / PubMed:29146813 |
手法 | EM (単粒子) |
解像度 | 3.9 - 10.0 Å |
構造データ | EMDB-7059, PDB-6b6h: EMDB-7060: |
化合物 | ChemComp-ZN: ChemComp-MG: ChemComp-CMP: |
由来 |
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キーワード | TRANSCRIPTION/TRANSFERASE/DNA/RNA / transcription / RNA polymerase / catabolite activator protein / cAMP / TRANSCRIPTION-TRANSFERASE-DNA-RNA complex |