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- PDB-6jnx: Cryo-EM structure of a Q-engaged arrested complex -

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Basic information

Entry
Database: PDB / ID: 6jnx
TitleCryo-EM structure of a Q-engaged arrested complex
Components
  • (DNA (63-MER)) x 2
  • (DNA-directed RNA polymerase subunit ...Polymerase) x 4
  • Antiterminator Q protein
  • RNA (5'-R(P*AP*UP*AP*AP*GP*GP*UP*GP*GP*GP*GP*UP*UP*AP*GP*UP*GP*A)-3')
  • RNA polymerase sigma factor RpoD
KeywordsTRANSCRIPTION / DNA / RNA / RNA polymerase / Antitermination
Function / homology
Function and homology information


negative regulation of termination of DNA-templated transcription / sigma factor antagonist complex / RNA polymerase complex / submerged biofilm formation / cellular response to cell envelope stress / cytosolic DNA-directed RNA polymerase complex / regulation of DNA-templated transcription initiation / bacterial-type flagellum assembly / sigma factor activity / bacterial-type flagellum-dependent cell motility ...negative regulation of termination of DNA-templated transcription / sigma factor antagonist complex / RNA polymerase complex / submerged biofilm formation / cellular response to cell envelope stress / cytosolic DNA-directed RNA polymerase complex / regulation of DNA-templated transcription initiation / bacterial-type flagellum assembly / sigma factor activity / bacterial-type flagellum-dependent cell motility / nitrate assimilation / transcription elongation factor complex / regulation of DNA-templated transcription elongation / transcription antitermination / cell motility / DNA-templated transcription initiation / ribonucleoside binding / DNA-directed 5'-3' RNA polymerase activity / DNA-directed RNA polymerase / response to heat / protein-containing complex assembly / intracellular iron ion homeostasis / protein dimerization activity / response to antibiotic / negative regulation of DNA-templated transcription / magnesium ion binding / DNA binding / zinc ion binding / membrane / cytosol / cytoplasm
Similarity search - Function
Bacteriophage 933W, GpQ / Phage antitermination protein Q / RNA polymerase sigma factor 70, non-essential domain / Sigma-70, non-essential region / RNA polymerase sigma factor 70, region 1.1 / Sigma-70 factor, region 1.1 superfamily / Sigma-70 factor, region 1.1 / Sigma-70 factors family signature 1. / RNA polymerase sigma factor RpoD, C-terminal / RNA polymerase sigma factor RpoD ...Bacteriophage 933W, GpQ / Phage antitermination protein Q / RNA polymerase sigma factor 70, non-essential domain / Sigma-70, non-essential region / RNA polymerase sigma factor 70, region 1.1 / Sigma-70 factor, region 1.1 superfamily / Sigma-70 factor, region 1.1 / Sigma-70 factors family signature 1. / RNA polymerase sigma factor RpoD, C-terminal / RNA polymerase sigma factor RpoD / RNA polymerase sigma-70 region 1.2 / Sigma-70 factor, region 1.2 / RNA polymerase sigma-70 region 3 / Sigma-70 region 3 / Sigma-70 factors family signature 2. / RNA polymerase sigma-70 / RNA polymerase sigma-70 region 4 / Sigma-70, region 4 / RNA polymerase sigma-70 region 2 / RNA polymerase sigma-70 like domain / Sigma-70 region 2 / RNA polymerase sigma factor, region 2 / RNA polymerase sigma factor, region 3/4-like / 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 Rpb1, domain 3 / RNA polymerase Rpb1, domain 3 / RNA polymerase Rpb2, domain 2 superfamily / 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, 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 / RNA polymerase, beta subunit, protrusion / RNA polymerase beta subunit / 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 / Winged helix-like DNA-binding domain superfamily
Similarity search - Domain/homology
DNA / DNA (> 10) / RNA / RNA (> 10) / Antiterminator Q protein / RNA polymerase sigma factor RpoD / DNA-directed RNA polymerase subunit alpha / DNA-directed RNA polymerase subunit omega / DNA-directed RNA polymerase subunit beta' / DNA-directed RNA polymerase subunit beta
Similarity search - Component
Biological speciesEscherichia coli K-12 (bacteria)
Enterobacteria phage SfI (virus)
Enterobacteria phage P21 (virus)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.08 Å
AuthorsFeng, Y. / Shi, J.
CitationJournal: Nat Commun / Year: 2019
Title: Structural basis of Q-dependent transcription antitermination.
Authors: Jing Shi / Xiang Gao / Tongguan Tian / Zhaoyang Yu / Bo Gao / Aijia Wen / Linlin You / Shenghai Chang / Xing Zhang / Yu Zhang / Yu Feng /
Abstract: Bacteriophage Q protein engages σ-dependent paused RNA polymerase (RNAP) by binding to a DNA site embedded in late gene promoter and renders RNAP resistant to termination signals. Here, we report a ...Bacteriophage Q protein engages σ-dependent paused RNA polymerase (RNAP) by binding to a DNA site embedded in late gene promoter and renders RNAP resistant to termination signals. Here, we report a single-particle cryo-electron microscopy (cryo-EM) structure of an intact Q-engaged arrested complex. The structure reveals key interactions responsible for σ-dependent pause, Q engagement, and Q-mediated transcription antitermination. The structure shows that two Q protomers (Q and Q) bind to a direct-repeat DNA site and contact distinct elements of the RNA exit channel. Notably, Q forms a narrow ring inside the RNA exit channel and renders RNAP resistant to termination signals by prohibiting RNA hairpin formation in the RNA exit channel. Because the RNA exit channel is conserved among all multisubunit RNAPs, it is likely to serve as an important contact site for regulators that modify the elongation properties of RNAP in other organisms, as well.
History
DepositionMar 18, 2019Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Jun 12, 2019Provider: repository / Type: Initial release
Revision 1.1Jul 17, 2019Group: Data collection / Database references / Category: citation / citation_author
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation_author.identifier_ORCID / _citation_author.name
Revision 1.2Nov 6, 2019Group: Data collection / Other / Category: cell / Item: _cell.Z_PDB
Revision 1.3Mar 27, 2024Group: Data collection / Database references / Derived calculations
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / struct_conn
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr1_label_seq_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_comp_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_atom_id / _struct_conn.ptnr2_label_comp_id / _struct_conn.ptnr2_label_seq_id

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Structure visualization

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Assembly

Deposited unit
A: DNA-directed RNA polymerase subunit alpha
B: DNA-directed RNA polymerase subunit alpha
C: DNA-directed RNA polymerase subunit beta
D: DNA-directed RNA polymerase subunit beta'
E: DNA-directed RNA polymerase subunit omega
F: RNA polymerase sigma factor RpoD
N: DNA (63-MER)
R: RNA (5'-R(P*AP*UP*AP*AP*GP*GP*UP*GP*GP*GP*GP*UP*UP*AP*GP*UP*GP*A)-3')
T: DNA (63-MER)
P: Antiterminator Q protein
Q: Antiterminator Q protein
hetero molecules


Theoretical massNumber of molelcules
Total (without water)542,22214
Polymers542,06711
Non-polymers1553
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area54020 Å2
ΔGint-275 kcal/mol
Surface area186500 Å2

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Components

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DNA-directed RNA polymerase subunit ... , 4 types, 5 molecules ABCDE

#1: Protein DNA-directed RNA polymerase subunit alpha / Polymerase / RNAP subunit alpha / RNA polymerase subunit alpha / Transcriptase subunit alpha


Mass: 36558.680 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli K-12 (bacteria) / Strain: K-12 / Gene: rpoA / Production host: Escherichia coli (E. coli) / References: UniProt: P0A7Z4, DNA-directed RNA polymerase
#2: Protein DNA-directed RNA polymerase subunit beta / Polymerase / RNAP subunit beta / RNA polymerase subunit beta / Transcriptase subunit beta


Mass: 150820.875 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli K-12 (bacteria) / Strain: K-12 / Gene: rpoB / Production host: Escherichia coli (E. coli) / References: UniProt: P0A8V2, DNA-directed RNA polymerase
#3: Protein DNA-directed RNA polymerase subunit beta' / Polymerase / RNAP subunit beta' / RNA polymerase subunit beta' / Transcriptase subunit beta'


Mass: 155366.781 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli K-12 (bacteria) / Strain: K-12 / Gene: rpoC / Production host: Escherichia coli (E. coli) / References: UniProt: P0A8T7, DNA-directed RNA polymerase
#4: Protein DNA-directed RNA polymerase subunit omega / Polymerase / RNAP omega subunit / RNA polymerase omega subunit / Transcriptase subunit omega


Mass: 10249.547 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli K-12 (bacteria) / Strain: K-12 / Gene: rpoZ / Production host: Escherichia coli (E. coli) / References: UniProt: P0A800, DNA-directed RNA polymerase

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Protein , 2 types, 3 molecules FPQ

#5: Protein RNA polymerase sigma factor RpoD / Sigma-70


Mass: 70352.242 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli K-12 (bacteria) / Strain: K-12 / Gene: rpoD / Production host: Escherichia coli (E. coli) / References: UniProt: P00579
#9: Protein Antiterminator Q protein


Mass: 18712.908 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Enterobacteria phage SfI (virus) / Gene: Q / Production host: Escherichia coli (E. coli) / References: UniProt: M1FPN0

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DNA chain , 2 types, 2 molecules NT

#6: DNA chain DNA (63-MER)


Mass: 19558.576 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Enterobacteria phage P21 (virus)
#8: DNA chain DNA (63-MER)


Mass: 19282.377 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Enterobacteria phage P21 (virus)

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RNA chain , 1 types, 1 molecules R

#7: RNA chain RNA (5'-R(P*AP*UP*AP*AP*GP*GP*UP*GP*GP*GP*GP*UP*UP*AP*GP*UP*GP*A)-3')


Mass: 5893.548 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Enterobacteria phage P21 (virus)

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Non-polymers , 2 types, 3 molecules

#10: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Mg
#11: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Zn

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: 21Q-engaged arrested complex / Type: COMPLEX / Entity ID: #1-#9 / Source: MULTIPLE SOURCES
Molecular weightExperimental value: NO
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
11Escherichia coli K-12 (bacteria)83333
21Enterobacteria phage SfI (virus)1225789
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 8
SpecimenConc.: 8 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE / Humidity: 95 % / Chamber temperature: 283 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy
Image recordingElectron dose: 56 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 4.08 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 64497 / Symmetry type: POINT

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