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- PDB-8g7e: Cryo-EM structure of 3DVA component 0 of Escherichia coli que-PEC... -

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Basic information

Entry
Database: PDB / ID: 8g7e
TitleCryo-EM structure of 3DVA component 0 of Escherichia coli que-PEC (paused elongation complex) RNA Polymerase plus preQ1 ligand
Components
  • (DNA-directed RNA polymerase subunit ...) x 4
  • DNA (31-MER)
  • DNA (39-mer)
  • RNA (47-MER)
KeywordsTRANSCRIPTION / RNA Polymerase / Riboswitch / preQ1
Function / homology
Function and homology information


DNA-directed RNA polymerase complex / ribonucleoside binding / DNA-directed 5'-3' RNA polymerase activity / DNA-directed RNA polymerase / protein dimerization activity / DNA-templated transcription / magnesium ion binding / DNA binding / zinc ion binding / cytoplasm
Similarity search - Function
DNA-directed RNA polymerase, omega subunit / DNA-directed RNA polymerase, subunit beta-prime, bacterial type / DNA-directed RNA polymerase, beta subunit, external 1 domain superfamily / DNA-directed RNA polymerase, beta subunit, external 1 domain / RNA polymerase beta subunit external 1 domain / RNA polymerase, alpha subunit, C-terminal / Bacterial RNA polymerase, alpha chain C terminal domain / DNA-directed RNA polymerase, alpha subunit / DNA-directed RNA polymerase beta subunit, bacterial-type / RNA polymerase Rpb6 ...DNA-directed RNA polymerase, omega subunit / DNA-directed RNA polymerase, subunit beta-prime, bacterial type / DNA-directed RNA polymerase, beta subunit, external 1 domain superfamily / DNA-directed RNA polymerase, beta subunit, external 1 domain / RNA polymerase beta subunit external 1 domain / RNA polymerase, alpha subunit, C-terminal / Bacterial RNA polymerase, alpha chain C terminal domain / DNA-directed RNA polymerase, alpha subunit / DNA-directed RNA polymerase beta subunit, bacterial-type / RNA polymerase Rpb6 / RNA polymerase, subunit omega/Rpo6/RPB6 / RNA polymerase Rpb6 / RNA polymerase Rpb1, domain 3 superfamily / RNA polymerase Rpb1, clamp domain superfamily / RPB6/omega subunit-like superfamily / DNA-directed RNA polymerase, subunit beta-prime / RNA polymerase Rpb2, domain 2 superfamily / RNA polymerase Rpb1, domain 3 / RNA polymerase Rpb1, domain 3 / RNA polymerase Rpb1, domain 1 / RNA polymerase Rpb1, domain 1 / RNA polymerase, alpha subunit / RNA polymerase Rpb1, domain 4 / RNA polymerase Rpb1, domain 2 / RNA polymerase Rpb1, domain 4 / RNA polymerase, beta subunit, protrusion / RNA polymerase beta subunit / RNA polymerase, N-terminal / RNA polymerase Rpb1, funnel domain superfamily / RNA polymerase I subunit A N-terminus / RNA polymerase Rpb1, domain 5 / RNA polymerase Rpb1, domain 5 / DNA-directed RNA polymerase, insert domain / DNA-directed RNA polymerase, RpoA/D/Rpb3-type / RNA polymerase Rpb3/RpoA insert domain / RNA polymerase Rpb3/Rpb11 dimerisation domain / RNA polymerases D / DNA-directed RNA polymerase, insert domain superfamily / RNA polymerase, RBP11-like subunit / RNA polymerase Rpb2, domain 2 / RNA polymerase Rpb2, domain 2 / RNA polymerase, beta subunit, conserved site / RNA polymerase Rpb2, domain 7 / RNA polymerase Rpb2, domain 3 / RNA polymerase Rpb2, OB-fold / RNA polymerase Rpb2, domain 7 / RNA polymerase Rpb2, domain 3 / RNA polymerases beta chain signature. / DNA-directed RNA polymerase, subunit 2, hybrid-binding domain / DNA-directed RNA polymerase, subunit 2 / DNA-directed RNA polymerase, subunit 2, hybrid-binding domain superfamily / RNA polymerase Rpb2, domain 6
Similarity search - Domain/homology
7-DEAZA-7-AMINOMETHYL-GUANINE / DNA / DNA (> 10) / RNA / RNA (> 10) / DNA-directed RNA polymerase subunit alpha / DNA-directed RNA polymerase subunit beta / DNA-directed RNA polymerase subunit beta' / DNA-directed RNA polymerase subunit omega
Similarity search - Component
Biological speciesEscherichia coli (E. coli)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.9 Å
AuthorsPorta, J.C. / Chauvier, A. / Deb, I. / Ellinger, E. / Frank, A.T. / Meze, K. / Ohi, M.D. / Walter, N.G.
Funding support United States, 4items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM131922 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM118524 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)S10OD020011 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)S10OD030275 United States
CitationJournal: Nat Struct Mol Biol / Year: 2023
Title: Structural basis for control of bacterial RNA polymerase pausing by a riboswitch and its ligand.
Authors: Adrien Chauvier / Jason C Porta / Indrajit Deb / Emily Ellinger / Katarina Meze / Aaron T Frank / Melanie D Ohi / Nils G Walter /
Abstract: Folding of nascent transcripts can be modulated by the RNA polymerase (RNAP) that carries out their transcription, and vice versa. A pause of RNAP during transcription of a preQ riboswitch (termed ...Folding of nascent transcripts can be modulated by the RNA polymerase (RNAP) that carries out their transcription, and vice versa. A pause of RNAP during transcription of a preQ riboswitch (termed que-PEC) is stabilized by a previously characterized template consensus sequence and the ligand-free conformation of the nascent RNA. Ligand binding to the riboswitch induces RNAP pause release and downstream transcription termination; however, the mechanism by which riboswitch folding modulates pausing is unclear. Here, we report single-particle cryo-electron microscopy reconstructions of que-PEC in ligand-free and ligand-bound states. In the absence of preQ, the RNA transcript is in an unexpected hyper-translocated state, preventing downstream nucleotide incorporation. Strikingly, on ligand binding, the riboswitch rotates around its helical axis, expanding the surrounding RNAP exit channel and repositioning the transcript for elongation. Our study reveals the tight coupling by which nascent RNA structures and their ligands can functionally regulate the macromolecular transcription machinery.
History
DepositionFeb 16, 2023Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jun 21, 2023Provider: repository / Type: Initial release
Revision 1.1Jul 26, 2023Group: Database references / Refinement description / Category: citation / refine
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _refine.ls_d_res_high
Revision 1.2Jun 19, 2024Group: Data collection / Refinement description
Category: chem_comp_atom / chem_comp_bond / em_3d_fitting_list
Item: _em_3d_fitting_list.initial_refinement_model_id

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