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- PDB-7ywa: Structure of DinI in complex with RecA filament -

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Basic information

Entry
Database: PDB / ID: 7ywa
TitleStructure of DinI in complex with RecA filament
Components
  • DNA (5'-D(P*TP*TP*TP*TP*TP*T)-3')
  • DNA damage-inducible protein I
  • Protein RecA
KeywordsDNA BINDING PROTEIN/DNA / SOS response / Filament / DNA repair / DNA BINDING PROTEIN-DNA COMPLEX
Function / homology
Function and homology information


ATP-dependent DNA damage sensor activity / SOS response / single-stranded DNA binding / DNA recombination / damaged DNA binding / DNA repair / enzyme binding / ATP hydrolysis activity / ATP binding / cytosol
Similarity search - Function
DNA damage-inducible protein DinI-like / DinI-like superfamily / DinI-like family / : / : / RecA C-terminal domain / DNA recombination/repair protein RecA, conserved site / DNA recombination and repair protein RecA, C-terminal / recA signature. / DNA recombination and repair protein RecA ...DNA damage-inducible protein DinI-like / DinI-like superfamily / DinI-like family / : / : / RecA C-terminal domain / DNA recombination/repair protein RecA, conserved site / DNA recombination and repair protein RecA, C-terminal / recA signature. / DNA recombination and repair protein RecA / recA bacterial DNA recombination protein / DNA recombination and repair protein RecA, monomer-monomer interface / RecA family profile 2. / DNA recombination and repair protein RecA-like, ATP-binding domain / RecA family profile 1. / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER / DNA / Protein RecA / DNA damage-inducible protein I
Similarity search - Component
Biological speciesEscherichia coli (E. coli)
MethodELECTRON MICROSCOPY / helical reconstruction / cryo EM / Resolution: 3.26 Å
AuthorsGao, B. / Feng, Y.
Funding support China, 1items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)31970040 China
CitationJournal: Proc Natl Acad Sci U S A / Year: 2023
Title: Structural basis for regulation of SOS response in bacteria.
Authors: Bo Gao / Liang Liang / Lu Su / Aijia Wen / Chun Zhou / Yu Feng /
Abstract: In response to DNA damage, bacterial RecA protein forms filaments with the assistance of DinI protein. The RecA filaments stimulate the autocleavage of LexA, the repressor of more than 50 SOS genes, ...In response to DNA damage, bacterial RecA protein forms filaments with the assistance of DinI protein. The RecA filaments stimulate the autocleavage of LexA, the repressor of more than 50 SOS genes, and activate the SOS response. During the late phase of SOS response, the RecA filaments stimulate the autocleavage of UmuD and λ repressor CI, leading to mutagenic repair and lytic cycle, respectively. Here, we determined the cryo-electron microscopy structures of RecA filaments in complex with DinI, LexA, UmuD, and λCI by helical reconstruction. The structures reveal that LexA and UmuD dimers bind in the filament groove and cleave in an intramolecular and an intermolecular manner, respectively, while λCI binds deeply in the filament groove as a monomer. Despite their distinct folds and oligomeric states, all RecA filament binders recognize the same conserved protein features in the filament groove. The SOS response in bacteria can lead to mutagenesis and antimicrobial resistance, and our study paves the way for rational drug design targeting the bacterial SOS response.
History
DepositionAug 22, 2022Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Dec 21, 2022Provider: repository / Type: Initial release
Revision 1.1Jan 18, 2023Group: 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.year / _citation_author.identifier_ORCID

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: DNA damage-inducible protein I
F: Protein RecA
G: Protein RecA
S: DNA (5'-D(P*TP*TP*TP*TP*TP*T)-3')
hetero molecules


Theoretical massNumber of molelcules
Total (without water)87,8668
Polymers86,7714
Non-polymers1,0954
Water0
1


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

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Components

#1: Protein DNA damage-inducible protein I


Mass: 8957.937 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (E. coli) / Strain: K-12 / Gene: dinI / Production host: Escherichia coli (E. coli) / References: UniProt: P0ABR1
#2: Protein Protein RecA / Recombinase A


Mass: 38016.277 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (E. coli) / Gene: recA / Production host: Escherichia coli (E. coli) / References: UniProt: A0A485JBB4
#3: DNA chain DNA (5'-D(P*TP*TP*TP*TP*TP*T)-3')


Mass: 1780.199 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Escherichia coli (E. coli)
#4: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Mg
#5: Chemical ChemComp-AGS / PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER / ATP-GAMMA-S / ADENOSINE 5'-(3-THIOTRIPHOSPHATE) / ADENOSINE 5'-(GAMMA-THIOTRIPHOSPHATE) / ADENOSINE-5'-DIPHOSPHATE MONOTHIOPHOSPHATE


Mass: 523.247 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C10H16N5O12P3S / Comment: ATP-gamma-S, energy-carrying molecule analogue*YM
Has ligand of interestN

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: HELICAL ARRAY / 3D reconstruction method: helical reconstruction

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Sample preparation

Component
IDNameTypeEntity IDParent-IDSource
1RecA-DinI complexCOMPLEX#1-#30MULTIPLE SOURCES
2RecA-DinICOMPLEX#1-#21RECOMBINANT
3DNACOMPLEX#31SYNTHETIC
Molecular weightExperimental value: NO
Source (natural)Organism: Escherichia coli (E. coli)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.5
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 FIELDBright-field microscopy / Nominal defocus max: 2000 nm / Nominal defocus min: 1000 nm
Image recordingElectron dose: 62 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Helical symmertyAngular rotation/subunit: 118 ° / Axial rise/subunit: 31.5 Å / Axial symmetry: C1
3D reconstructionResolution: 3.26 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 40451 / Symmetry type: HELICAL

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