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- PDB-9ga5: MtUvrA2 bound to endogenous E. coli DNA -

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Basic information

Entry
Database: PDB / ID: 9ga5
TitleMtUvrA2 bound to endogenous E. coli DNA
Components
  • (Endogenous E. coli DNA) x 2
  • UvrABC system protein A
KeywordsDNA BINDING PROTEIN / DNA repair / NER / UVRA / UVRB / UVR / MTB
Function / homology
Function and homology information


negative regulation of strand invasion / excinuclease ABC activity / excinuclease repair complex / SOS response / peptidoglycan-based cell wall / nucleotide-excision repair / DNA damage response / ATP hydrolysis activity / DNA binding / zinc ion binding ...negative regulation of strand invasion / excinuclease ABC activity / excinuclease repair complex / SOS response / peptidoglycan-based cell wall / nucleotide-excision repair / DNA damage response / ATP hydrolysis activity / DNA binding / zinc ion binding / ATP binding / plasma membrane / cytosol
Similarity search - Function
UvrA, interaction domain / UvrA interaction domain / UvrABC system subunit A / UvrA DNA-binding domain / UvrA DNA-binding domain / ABC transporter-like, conserved site / ABC transporters family signature. / ABC transporter-like, ATP-binding domain / ATP-binding cassette, ABC transporter-type domain profile. / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
ADENOSINE-5'-DIPHOSPHATE / DNA / DNA (> 10) / UvrABC system protein A
Similarity search - Component
Biological speciesMycobacterium tuberculosis (bacteria)
Escherichia coli (E. coli)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.2 Å
AuthorsGenta, M. / Capelli, R. / Ferrara, G. / Rizzi, M. / Rossi, F. / Jeruzalmi, D. / Bolognesi, M. / Chaves-Sanjuan, A. / Miggiano, R.
Funding support Italy, 1items
OrganizationGrant numberCountry
Ministero dell Universita e della RicercaP2022P8KMF Italy
CitationJournal: Nat Commun / Year: 2025
Title: Mechanistic understanding of UvrA damage detection and lesion hand-off to UvrB in Nucleotide Excision Repair.
Authors: Marianna Genta / Giulia Ferrara / Riccardo Capelli / Diego Rondelli / Sarah Sertic / Martino Bolognesi / Menico Rizzi / Franca Rossi / David Jeruzalmi / Antonio Chaves-Sanjuan / Riccardo Miggiano /
Abstract: Nucleotide excision repair (NER) represents one of the major molecular machineries that control chromosome stability in all living species. In Eubacteria, the initial stages of the repair process are ...Nucleotide excision repair (NER) represents one of the major molecular machineries that control chromosome stability in all living species. In Eubacteria, the initial stages of the repair process are carried out by the UvrABC excinuclease complex. Despite the wealth of structural data available, some crucial details of the pathway remain elusive. In this study, we present a structural investigation of the Mycobacterium tuberculosis UvrAUvrB complex and of the UvrA dimer, both in complex with damaged DNA. Our analyses yield insights into the DNA binding mode of UvrA, showing an unexplored conformation of Insertion Domains (IDs), underlying the essential role of these domains in DNA coordination. Furthermore, we observe an interplay between the ID and the UvrB Binding Domain (UBD): after the recognition of the damage, the IDs repositions with the concomitant reorganization of UBD, allowing the formation of the complex between UvrA and UvrB. These events are detected along the formation of the uncharacterized UvrAUvrB-DNA and the UvrAUvrB-DNA complexes which we interpret as hierarchical steps initiating the DNA repair cascade in the NER pathway, resulting in the formation of the pre-incision complex.
History
DepositionJul 26, 2024Deposition site: PDBE / Processing site: PDBE
Revision 1.0Apr 23, 2025Provider: repository / Type: Initial release
Revision 1.0Apr 23, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
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Revision 1.1Jun 4, 2025Group: Data collection / Database references / Category: citation / citation_author / em_admin
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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: UvrABC system protein A
B: UvrABC system protein A
C: Endogenous E. coli DNA
D: Endogenous E. coli DNA
hetero molecules


Theoretical massNumber of molelcules
Total (without water)239,00510
Polymers237,8894
Non-polymers1,1166
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

#1: Protein UvrABC system protein A / UvrA protein / Excinuclease ABC subunit A


Mass: 106945.383 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mycobacterium tuberculosis (bacteria) / Gene: uvrA, Rv1638, MTCY06H11.02 / Production host: Escherichia coli (E. coli) / References: UniProt: P9WQK7
#2: DNA chain Endogenous E. coli DNA


Mass: 12048.851 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: unknown sequence / Source: (natural) Escherichia coli (E. coli)
#3: DNA chain Endogenous E. coli DNA


Mass: 11949.698 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: unknown sequence / Source: (natural) Escherichia coli (E. coli)
#4: Chemical
ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Zn / Feature type: SUBJECT OF INVESTIGATION
#5: Chemical ChemComp-ADP / ADENOSINE-5'-DIPHOSPHATE


Mass: 427.201 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C10H15N5O10P2 / Feature type: SUBJECT OF INVESTIGATION / Comment: ADP, energy-carrying molecule*YM
Has ligand of interestY
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

Component
IDNameTypeDetailsEntity IDParent-IDSource
1MtUvrA2-DNA complexCOMPLEXMtUvrA2 dimer in complex with DNA#1-#30MULTIPLE SOURCES
2MtUvrA2COMPLEX#11RECOMBINANT
3DNACOMPLEX#2-#31NATURAL
Molecular weightValue: 0.22 MDa / Experimental value: NO
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
22Mycobacterium tuberculosis (bacteria)1773
33Escherichia coli (E. coli)562
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 8
Buffer component
IDConc.NameFormulaBuffer-ID
1300 mMNaClNaCl1
220 mMTris HCl1
SpecimenConc.: 0.5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportDetails: 30mA / Grid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K

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Electron microscopy imaging

Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company
MicroscopyModel: FEI TALOS ARCTICA
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal magnification: 105000 X / Nominal defocus max: 2500 nm / Nominal defocus min: 800 nm / Cs: 2.7 mm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingElectron dose: 40 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) / Num. of grids imaged: 1 / Num. of real images: 21232

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Processing

EM software
IDNameVersionCategory
1Warpparticle selection
4CTFFIND4CTF correction
10cryoSPARCinitial Euler assignment
11cryoSPARCfinal Euler assignment
12cryoSPARCclassification
13cryoSPARC3D reconstruction
CTF correctionType: PHASE FLIPPING ONLY
Particle selectionNum. of particles selected: 666671
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 229676 / Symmetry type: POINT

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