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- PDB-6m6a: Cryo-EM structure of Thermus thermophilus Mfd in complex with RNA... -

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Basic information

Entry
Database: PDB / ID: 6m6a
TitleCryo-EM structure of Thermus thermophilus Mfd in complex with RNA polymerase
Components
  • (DNA-directed RNA polymerase subunit ...) x 4
  • Transcription-repair-coupling factor
  • nontemplate strand DNA
  • template strand DNA
KeywordsTRANSCRIPTION / RNA polymerase / DNA repair / Mfd
Function / homology
Function and homology information


transcription-coupled nucleotide-excision repair, DNA damage recognition / DNA-directed RNA polymerase complex / DNA helicase activity / Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement / ribonucleoside binding / DNA-directed RNA polymerase / DNA-directed RNA polymerase activity / damaged DNA binding / hydrolase activity / protein dimerization activity ...transcription-coupled nucleotide-excision repair, DNA damage recognition / DNA-directed RNA polymerase complex / DNA helicase activity / Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement / ribonucleoside binding / DNA-directed RNA polymerase / DNA-directed RNA polymerase activity / damaged DNA binding / hydrolase activity / protein dimerization activity / DNA-templated transcription / regulation of DNA-templated transcription / magnesium ion binding / DNA binding / zinc ion binding / ATP binding / cytoplasm
Similarity search - Function
Transcription-repair coupling factor / Transcription-repair-coupling factor, C-terminal domain / TRCF-like, C-terminal D7 domain / TRCF domain / TRCF / : / CarD-like/TRCF, RNAP-interacting domain / CarD-like/TRCF, RNAP-interacting domain superfamily / CarD-like/TRCF RID domain / CarD-like/TRCF domain ...Transcription-repair coupling factor / Transcription-repair-coupling factor, C-terminal domain / TRCF-like, C-terminal D7 domain / TRCF domain / TRCF / : / 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 subunit beta', hybrid domain / 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 beta subunit, bacterial-type / DNA-directed RNA polymerase, alpha subunit / DEAD/DEAH box helicase domain / DEAD/DEAH box helicase / DNA-directed RNA polymerase, subunit beta-prime / RNA polymerase Rpb6 / Helicase conserved C-terminal domain / 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 Rpb1, domain 1 / RNA polymerase, beta subunit, protrusion / RNA polymerase beta subunit / RNA polymerase, alpha subunit / RNA polymerase Rpb1, domain 5 / RNA polymerase Rpb1, domain 4 / RNA polymerase Rpb1, domain 2 / RNA polymerase Rpb1, domain 5 / RNA polymerase Rpb1, domain 4 / DNA-directed RNA polymerase, insert domain superfamily / RNA polymerase, N-terminal / RNA polymerase Rpb2, domain 2 / RNA polymerase Rpb1, funnel domain superfamily / RNA polymerase Rpb2, domain 2 / RNA polymerase I subunit A N-terminus / RNA polymerase, RBP11-like subunit / 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 / helicase superfamily c-terminal domain / Superfamilies 1 and 2 helicase C-terminal domain profile. / Superfamilies 1 and 2 helicase ATP-binding type-1 domain profile. / DEAD-like helicases superfamily / Helicase, C-terminal / Helicase superfamily 1/2, ATP-binding domain / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
DNA / DNA (> 10) / DNA-directed RNA polymerase subunit alpha / Transcription-repair-coupling factor / DNA-directed RNA polymerase subunit omega / DNA-directed RNA polymerase subunit beta' / DNA-directed RNA polymerase subunit beta
Similarity search - Component
Biological speciesThermus thermophilus (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 5 Å
AuthorsShi, J. / Wen, A. / Feng, Y.
Funding support China, 1items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)31970040 China
CitationJournal: Nucleic Acids Res / Year: 2020
Title: Structural basis of Mfd-dependent transcription termination.
Authors: Jing Shi / Aijia Wen / Minxing Zhao / Sha Jin / Linlin You / Yue Shi / Shuling Dong / Xiaoting Hua / Yu Zhang / Yu Feng /
Abstract: Mfd-dependent transcription termination plays an important role in transcription-coupled DNA repair, transcription-replication conflict resolution, and antimicrobial resistance development. Despite ...Mfd-dependent transcription termination plays an important role in transcription-coupled DNA repair, transcription-replication conflict resolution, and antimicrobial resistance development. Despite extensive studies, the molecular mechanism of Mfd-dependent transcription termination in bacteria remains unclear, with several long-standing puzzles. How Mfd is activated by stalled RNA polymerase (RNAP) and how activated Mfd translocates along the DNA are unknown. Here, we report the single-particle cryo-electron microscopy structures of T. thermophilus Mfd-RNAP complex with and without ATPγS. The structures reveal that Mfd undergoes profound conformational changes upon activation, contacts the RNAP β1 domain and its clamp, and pries open the RNAP clamp. These structures provide a foundation for future studies aimed at dissecting the precise mechanism of Mfd-dependent transcription termination and pave the way for rational drug design targeting Mfd for the purpose of tackling the antimicrobial resistance crisis.
History
DepositionMar 14, 2020Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Oct 14, 2020Provider: repository / Type: Initial release
Revision 1.1Dec 16, 2020Group: Database references / Category: citation
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
Revision 1.2Mar 27, 2024Group: Data collection / Database references / Category: chem_comp_atom / chem_comp_bond / database_2
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession

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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
M: Transcription-repair-coupling factor
T: template strand DNA
N: nontemplate strand DNA
hetero molecules


Theoretical massNumber of molelcules
Total (without water)526,76611
Polymers526,6108
Non-polymers1553
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: native gel electrophoresis
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area35940 Å2
ΔGint-206 kcal/mol
Surface area155900 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 / RNAP subunit alpha / RNA polymerase subunit alpha / Transcriptase subunit alpha


Mass: 35056.164 Da / Num. of mol.: 2 / Source method: isolated from a natural source
Source: (natural) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SHR6, DNA-directed RNA polymerase
#2: Protein DNA-directed RNA polymerase subunit beta / RNAP subunit beta / RNA polymerase subunit beta / Transcriptase subunit beta


Mass: 125436.539 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q8RQE9, DNA-directed RNA polymerase
#3: Protein DNA-directed RNA polymerase subunit beta' / RNAP subunit beta' / RNA polymerase subunit beta' / Transcriptase subunit beta'


Mass: 170997.391 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q8RQE8, DNA-directed RNA polymerase
#4: Protein DNA-directed RNA polymerase subunit omega / RNAP omega subunit / RNA polymerase omega subunit / Transcriptase subunit omega


Mass: 11533.316 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q8RQE7, DNA-directed RNA polymerase

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Protein , 1 types, 1 molecules M

#5: Protein Transcription-repair-coupling factor / TRCF


Mass: 109874.047 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Thermus thermophilus (strain HB27 / ATCC BAA-163 / DSM 7039) (bacteria)
Strain: HB27 / ATCC BAA-163 / DSM 7039 / Gene: mfd, TT_C0533 / Production host: Escherichia coli (E. coli)
References: UniProt: Q72KB4, Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement

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DNA chain , 2 types, 2 molecules TN

#6: DNA chain template strand DNA


Mass: 19290.348 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Thermus thermophilus (bacteria)
#7: DNA chain nontemplate strand DNA


Mass: 19366.436 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Thermus thermophilus (bacteria)

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Non-polymers , 2 types, 3 molecules

#8: Chemical ChemComp-ZN / ZINC ION


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

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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: Thermus thermophilus transcription-coupled DNA repair complex
Type: COMPLEX / Entity ID: #1-#7 / Source: MULTIPLE SOURCES
Molecular weightExperimental value: NO
Source (natural)Organism: Thermus thermophilus (bacteria)
Buffer solutionpH: 7.9
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
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: 59 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: 5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 24037 / Symmetry type: POINT

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