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-Structure paper
Title | Structural basis of Rho-dependent transcription termination. |
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Journal, issue, pages | Nature, Vol. 614, Issue 7947, Page 367-374, Year 2023 |
Publish date | Jan 25, 2023 |
Authors | Vadim Molodtsov / Chengyuan Wang / Emre Firlar / Jason T Kaelber / Richard H Ebright / |
PubMed Abstract | Rho is a ring-shaped hexameric ATP-dependent molecular motor. Together with the transcription elongation factor NusG, Rho mediates factor-dependent transcription termination and transcription- ...Rho is a ring-shaped hexameric ATP-dependent molecular motor. Together with the transcription elongation factor NusG, Rho mediates factor-dependent transcription termination and transcription-translation-coupling quality control in Escherichia coli. Here we report the preparation of complexes that are functional in factor-dependent transcription termination from Rho, NusG, RNA polymerase (RNAP), and synthetic nucleic acid scaffolds, and we report cryogenic electron microscopy structures of the complexes. The structures show that functional factor-dependent pre-termination complexes contain a closed-ring Rho hexamer; have RNA threaded through the central channel of Rho; have 60 nucleotides of RNA interacting sequence-specifically with the exterior of Rho and 6 nucleotides of RNA interacting sequence-specifically with the central channel of Rho; have Rho oriented relative to RNAP such that ATP-dependent translocation by Rho exerts mechanical force on RNAP; and have NusG bridging Rho and RNAP. The results explain five decades of research on Rho and provide a foundation for understanding Rho's function. |
External links | Nature / PubMed:36697824 / PubMed Central |
Methods | EM (single particle) |
Resolution | 4.1 - 12.0 Å |
Structure data | EMDB-27864, PDB-8e3f: EMDB-27865, PDB-8e3h: EMDB-27897: Escherichia coli Rho-dependent transcription pre-termination complex containing 18 nt long RNA spacer, Mg-ADP-BeF3, and NusG EMDB-27913, PDB-8e5k: EMDB-27914, PDB-8e5l: EMDB-27915: Escherichia coli Rho-dependent transcription pre-termination complex containing 21 nt long RNA spacer, Mg-ADP-BeF3, and NusG EMDB-27916, PDB-8e5o: EMDB-27917, PDB-8e5p: EMDB-27918: Escherichia coli Rho-dependent transcription pre-termination complex containing 24 nt long RNA spacer, Mg-ADP-BeF3, and NusG EMDB-27928, PDB-8e6w: EMDB-27929: Escherichia coli Rho-dependent transcription pre-termination complex containing 18 nt long RNA spacer, lambda-tR1 rut RNA, Mg-ADP-BeF3, and NusG EMDB-27930, PDB-8e6x: EMDB-27931, PDB-8e6z: EMDB-27932, PDB-8e70: EMDB-27933: Escherichia coli Rho-dependent transcription pre-termination complex containing 18 nt long RNA spacer, dC75 rut mimic RNA |
Chemicals | ChemComp-MG: ChemComp-ZN: ChemComp-ADP: ChemComp-BEF: |
Source |
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Keywords | TRANSCRIPTION / TRANSFERASE/DNA/RNA / factor-dependent termination / Rho / transcription termination / transcription elongation complex / helicase / ATPase / TRANSFERASE-DNA-RNA complex / TRANSCRIPTION/RNA / TRANSCRIPTION-RNA complex |