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-Structure paper
タイトル | Structural basis of archaeal FttA-dependent transcription termination. |
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ジャーナル・号・ページ | Nature, Vol. 635, Issue 8037, Page 229-236, Year 2024 |
掲載日 | 2024年9月25日 |
著者 | Linlin You / Chengyuan Wang / Vadim Molodtsov / Konstantin Kuznedelov / Xinyi Miao / Breanna R Wenck / Paul Ulisse / Travis J Sanders / Craig J Marshall / Emre Firlar / Jason T Kaelber / Thomas J Santangelo / Richard H Ebright / |
PubMed 要旨 | The ribonuclease FttA (also known as aCPSF and aCPSF1) mediates factor-dependent transcription termination in archaea. Here we report the structure of a Thermococcus kodakarensis transcription pre- ...The ribonuclease FttA (also known as aCPSF and aCPSF1) mediates factor-dependent transcription termination in archaea. Here we report the structure of a Thermococcus kodakarensis transcription pre-termination complex comprising FttA, Spt4, Spt5 and a transcription elongation complex (TEC). The structure shows that FttA interacts with the TEC in a manner that enables RNA to proceed directly from the TEC RNA-exit channel to the FttA catalytic centre and that enables endonucleolytic cleavage of RNA by FttA, followed by 5'→3' exonucleolytic cleavage of RNA by FttA and concomitant 5'→3' translocation of FttA on RNA, to apply mechanical force to the TEC and trigger termination. The structure further reveals that Spt5 bridges FttA and the TEC, explaining how Spt5 stimulates FttA-dependent termination. The results reveal functional analogy between bacterial and archaeal factor-dependent termination, functional homology between archaeal and eukaryotic factor-dependent termination, and fundamental mechanistic similarities in factor-dependent termination in bacteria, archaea, and eukaryotes. |
リンク | Nature / PubMed:39322680 |
手法 | EM (単粒子) |
解像度 | 2.2 - 2.67 Å |
構造データ | EMDB-44438, PDB-9bct: EMDB-44439, PDB-9bcu: EMDB-44454: Cryo-EM structure of Thermococcus kodakarensis FttA-dependent transcription pre-termination complex containing 44 nt RNA EMDB-44455: Cryo-EM structure of Thermococcus kodakarensis FttA-dependent transcription pre-termination complex containing 52 nt RNA EMDB-44649: Cryo-EM structure of Thermococcus kodakarensis FttA-dependent transcription pre-termination complex containing 44 nt RNA (local refinement map) EMDB-44650: Cryo-EM structure of Thermococcus kodakarensis FttA-dependent transcription pre-termination complex containing 52 nt RNA (local refinement map) |
化合物 | ChemComp-MG: ChemComp-ZN: |
由来 |
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キーワード | TRANSCRIPTION / RNA polymerase / pre-termination complex / FttA / archaea |