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- PDB-6eec: Mycobacterium tuberculosis RNAP promoter unwinding intermediate c... -

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Basic information

Entry
Database: PDB / ID: 6eec
TitleMycobacterium tuberculosis RNAP promoter unwinding intermediate complex with RbpA/CarD and AP3 promoter captured by Corallopyronin
Components
  • (DNA-directed RNA polymerase subunit ...) x 4
  • (RNA polymerase-binding ...) x 2
  • DNA (63-MER)
  • DNA (65-MER)
  • RNA polymerase sigma factor SigA
KeywordsTRANSCRIPTION/DNA / initiation / transcription bubble / closed clamp / open promoter complex / TRANSCRIPTION / TRANSCRIPTION-DNA complex
Function / homology
Function and homology information


response to water / bacterial-type RNA polymerase holo enzyme binding / Antimicrobial action and antimicrobial resistance in Mtb / sigma factor activity / bacterial-type RNA polymerase core enzyme binding / rRNA transcription / cytosolic DNA-directed RNA polymerase complex / DNA-directed RNA polymerase complex / peptidoglycan-based cell wall / DNA-templated transcription initiation ...response to water / bacterial-type RNA polymerase holo enzyme binding / Antimicrobial action and antimicrobial resistance in Mtb / sigma factor activity / bacterial-type RNA polymerase core enzyme binding / rRNA transcription / cytosolic DNA-directed RNA polymerase complex / DNA-directed RNA polymerase complex / peptidoglycan-based cell wall / DNA-templated transcription initiation / ribonucleoside binding / : / : / : / : / : / : / DNA-directed RNA polymerase / nucleic acid binding / protein dimerization activity / response to antibiotic / positive regulation of DNA-templated transcription / magnesium ion binding / DNA binding / zinc ion binding / plasma membrane / cytosol / cytoplasm
Similarity search - Function
CarD-like, C-terminal domain / CarD-like, C-terminal domain / : / : / CarD, C-terminal domain / RNA polymerase-binding protein RbpA / RbpA superfamily / RNA polymerase-binding protein / CarD-like/TRCF, RNAP-interacting domain / CarD-like/TRCF, RNAP-interacting domain superfamily ...CarD-like, C-terminal domain / CarD-like, C-terminal domain / : / : / CarD, C-terminal domain / RNA polymerase-binding protein RbpA / RbpA superfamily / RNA polymerase-binding protein / CarD-like/TRCF, RNAP-interacting domain / CarD-like/TRCF, RNAP-interacting domain superfamily / CarD-like/TRCF RID domain / CarD-like/TRCF domain / Dna-directed Rna Polymerase Ii 140kd Polypeptide; Chain: B; domain 3 / RNA polymerase Rpb2, domain 2 / RNA polymerase Rpb1, domain 3 / RNA polymerase Rpb1 funnel domain / RNA polymerase, RBP11-like subunit / Sigma-70 factors family signature 1. / Enzyme I; Chain A, domain 2 / RNA polymerase sigma factor RpoD, C-terminal / RNA polymerase sigma factor RpoD / Topoisomerase I; Chain A, domain 4 / DNA-directed RNA polymerase, insert domain / : / 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 Alpha Subunit; Chain A, domain 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 / Gyrase A; domain 2 / 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 / Methane Monooxygenase Hydroxylase; Chain G, domain 1 / Beta Complex / DNA-directed RNA polymerase, subunit beta-prime / RNA polymerase Rpb6 / RNA polymerase, subunit omega/Rpo6/RPB6 / RNA polymerase Rpb6 / RNA polymerase Rpb2, domain 2 superfamily / RNA polymerase Rpb1, domain 3 superfamily / RPB6/omega subunit-like superfamily / 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 / RNA polymerase Rpb1, clamp domain superfamily / RNA polymerase Rpb1, domain 3 / RNA polymerase Rpb1, domain 3 / RNA polymerase Rpb1, domain 1 / RNA polymerase, beta subunit, protrusion / RNA polymerase beta subunit / RNA polymerase Rpb1, domain 1 / RNA polymerase, alpha subunit / RNA polymerase Rpb1, domain 5 / RNA polymerase Rpb1, domain 4 / DNA-directed RNA polymerase, insert domain superfamily / RNA polymerase Rpb1, domain 2 / RNA polymerase Rpb1, domain 5 / RNA polymerase Rpb1, domain 4 / RNA polymerase Rpb2, domain 2 / RNA polymerase Rpb2, domain 2 / RNA polymerase, RBP11-like subunit / RNA polymerase, N-terminal / RNA polymerase Rpb1, funnel domain superfamily / RNA polymerase I subunit A N-terminus / 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 / Alpha-Beta Complex / Up-down Bundle / 2-Layer Sandwich / Orthogonal Bundle / Mainly Beta / Mainly Alpha
Similarity search - Domain/homology
methyl / DNA / DNA (> 10) / DNA-directed RNA polymerase subunit omega / DNA-directed RNA polymerase subunit beta' / DNA-directed RNA polymerase subunit alpha / RNA polymerase sigma factor SigA / RNA polymerase sigma factor SigA / DNA-directed RNA polymerase subunit omega / DNA-directed RNA polymerase subunit beta' ...methyl / DNA / DNA (> 10) / DNA-directed RNA polymerase subunit omega / DNA-directed RNA polymerase subunit beta' / DNA-directed RNA polymerase subunit alpha / RNA polymerase sigma factor SigA / RNA polymerase sigma factor SigA / DNA-directed RNA polymerase subunit omega / DNA-directed RNA polymerase subunit beta' / DNA-directed RNA polymerase subunit beta / DNA-directed RNA polymerase subunit alpha / RNA polymerase-binding protein RbpA / RNA polymerase-binding protein RbpA / RNA polymerase-binding transcription factor CarD / RNA polymerase-binding transcription factor CarD / DNA-directed RNA polymerase subunit beta
Similarity search - Component
Biological speciesMycobacterium tuberculosis (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.55 Å
AuthorsDarst, S.A. / Campbell, E.A. / Boyaci Selcuk, H. / Chen, J.
CitationJournal: Nature / Year: 2019
Title: Structures of an RNA polymerase promoter melting intermediate elucidate DNA unwinding.
Authors: Hande Boyaci / James Chen / Rolf Jansen / Seth A Darst / Elizabeth A Campbell /
Abstract: A key regulated step of transcription is promoter melting by RNA polymerase (RNAP) to form the open promoter complex. To generate the open complex, the conserved catalytic core of the RNAP combines ...A key regulated step of transcription is promoter melting by RNA polymerase (RNAP) to form the open promoter complex. To generate the open complex, the conserved catalytic core of the RNAP combines with initiation factors to locate promoter DNA, unwind 12-14 base pairs of the DNA duplex and load the template-strand DNA into the RNAP active site. Formation of the open complex is a multi-step process during which transient intermediates of unknown structure are formed. Here we present cryo-electron microscopy structures of bacterial RNAP-promoter DNA complexes, including structures of partially melted intermediates. The structures show that late steps of promoter melting occur within the RNAP cleft, delineate key roles for fork-loop 2 and switch 2-universal structural features of RNAP-in restricting access of DNA to the RNAP active site, and explain why clamp opening is required to allow entry of single-stranded template DNA into the active site. The key roles of fork-loop 2 and switch 2 suggest a common mechanism for late steps in promoter DNA opening to enable gene expression across all domains of life.
History
DepositionAug 13, 2018Deposition site: RCSB / Processing site: RCSB
Revision 1.0Nov 21, 2018Provider: repository / Type: Initial release
Revision 1.0Nov 21, 2018Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Nov 21, 2018Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
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Revision 1.0Nov 21, 2018Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Nov 21, 2018Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.0Nov 21, 2018Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Nov 21, 2018Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Nov 21, 2018Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.0Nov 21, 2018Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Nov 21, 2018Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Nov 21, 2018Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.0Nov 21, 2018Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Nov 21, 2018Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Nov 21, 2018Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.1Jan 23, 2019Group: Data collection / Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year
Revision 1.2Jan 30, 2019Group: Data collection / Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first / _citation.page_last
Revision 1.3Dec 18, 2019Group: Other / Category: atom_sites
Item: _atom_sites.fract_transf_matrix[1][1] / _atom_sites.fract_transf_matrix[2][2] / _atom_sites.fract_transf_matrix[3][3]
Revision 1.4Mar 13, 2024Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Structure summary
Category: chem_comp / chem_comp_atom ...chem_comp / chem_comp_atom / chem_comp_bond / database_2 / entity / pdbx_entity_nonpoly
Item: _chem_comp.name / _database_2.pdbx_DOI ..._chem_comp.name / _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _entity.pdbx_description / _pdbx_entity_nonpoly.name
Revision 1.5Jun 4, 2025Group: Data collection / Structure summary / Category: em_admin / em_software / pdbx_entry_details / Item: _em_admin.last_update / _em_software.name
Revision 1.1Jun 4, 2025Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Data processing / Experimental summary / Data content type: EM metadata / EM metadata / Category: em_admin / em_software / Data content type: EM metadata / EM metadata / Item: _em_admin.last_update / _em_software.name

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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 SigA
J: RNA polymerase-binding protein RbpA
O: DNA (65-MER)
P: DNA (63-MER)
M: RNA polymerase-binding transcription factor CarD
hetero molecules


Theoretical massNumber of molelcules
Total (without water)510,84614
Polymers510,16410
Non-polymers6834
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: microscopy
TypeNameSymmetry operationNumber
identity operation1_5551

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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 / RNAP subunit alpha / RNA polymerase subunit alpha / Transcriptase subunit alpha


Mass: 37745.328 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mycobacterium tuberculosis (bacteria) / Gene: rpoA / Production host: Escherichia coli (E. coli)
References: UniProt: A5U8D3, UniProt: P9WGZ1*PLUS, DNA-directed RNA polymerase
#2: Protein DNA-directed RNA polymerase subunit beta / RNAP subunit beta / RNA polymerase subunit beta / Transcriptase subunit beta


Mass: 130070.797 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mycobacterium tuberculosis (bacteria) / Gene: rpoB, SAMEA2682864_01701 / Production host: Escherichia coli (E. coli)
References: UniProt: V9Z879, UniProt: P9WGY9*PLUS, DNA-directed RNA polymerase
#3: Protein DNA-directed RNA polymerase subunit beta' / RNAP subunit beta' / RNA polymerase subunit beta' / Transcriptase subunit beta'


Mass: 148202.219 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mycobacterium tuberculosis (bacteria) / Gene: rpoC / Production host: Escherichia coli (E. coli)
References: UniProt: A5U053, UniProt: P9WGY7*PLUS, DNA-directed RNA polymerase
#4: Protein DNA-directed RNA polymerase subunit omega / RNAP omega subunit / RNA polymerase omega subunit / Transcriptase subunit omega


Mass: 11776.996 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mycobacterium tuberculosis (bacteria)
Gene: rpoZ, ERS007672_03979, ERS007703_04032, ERS007720_04749, ERS027652_00548, ERS027654_02543, ERS027656_03959, ERS124361_02246
Production host: Escherichia coli (E. coli)
References: UniProt: A0A0T9N9K3, UniProt: P9WGY5*PLUS, DNA-directed RNA polymerase

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Protein , 1 types, 1 molecules F

#5: Protein RNA polymerase sigma factor SigA / Sigma-A


Mass: 58169.477 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mycobacterium tuberculosis (bacteria) / Gene: sigA, mysA, rpoD, rpoV / Production host: Escherichia coli (E. coli) / References: UniProt: P9WGI0, UniProt: P9WGI1*PLUS

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RNA polymerase-binding ... , 2 types, 2 molecules JM

#6: Protein RNA polymerase-binding protein RbpA


Mass: 12993.695 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mycobacterium tuberculosis (bacteria) / Gene: rbpA / Production host: Escherichia coli (E. coli) / References: UniProt: P9WHJ4, UniProt: P9WHJ5*PLUS
#9: Protein RNA polymerase-binding transcription factor CarD


Mass: 17933.361 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mycobacterium tuberculosis (bacteria) / Gene: carD / Production host: Escherichia coli (E. coli) / References: UniProt: P9WJG2, UniProt: P9WJG3*PLUS

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DNA chain , 2 types, 2 molecules OP

#7: DNA chain DNA (65-MER)


Mass: 27907.809 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Mycobacterium tuberculosis (bacteria)
#8: DNA chain DNA (63-MER)


Mass: 27618.625 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Mycobacterium tuberculosis (bacteria)

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Non-polymers , 3 types, 4 molecules

#10: Chemical ChemComp-C0L / methyl [(1E,5R)-5-{(3E)-3-[(2E,4E,8R,9E,12E)-1,8-dihydroxy-2,5,9-trimethyltetradeca-2,4,9,12-tetraen-1-ylidene]-2,4-dioxo-3,4-d ihydro-2H-pyran-6-yl}hex-1-en-1-yl]carbamate / Corallopyronin A


Mass: 527.649 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C30H41NO7 / Feature type: SUBJECT OF INVESTIGATION
#11: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Zn
#12: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Mg

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Details

Has protein modificationN

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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: Mycobacterium tuberculosis RNAP open promoter complex / Type: COMPLEX / Entity ID: #1-#9 / Source: RECOMBINANT
Source (natural)Organism: Mycobacterium tuberculosis (bacteria)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 8
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportDetails: unspecified
VitrificationCryogen name: ETHANE

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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 FIELD
Image recordingElectron dose: 69.9 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.13_2998: / Classification: refinement
EM softwareName: PHENIX / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.55 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 246409 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00930696
ELECTRON MICROSCOPYf_angle_d0.86142154
ELECTRON MICROSCOPYf_dihedral_angle_d13.18918275
ELECTRON MICROSCOPYf_chiral_restr0.0484789
ELECTRON MICROSCOPYf_plane_restr0.0055082

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