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Open data
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Basic information
Entry | Database: PDB / ID: 8giy | ||||||
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Title | E. coli clamp loader with closed clamp | ||||||
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![]() | DNA BINDING PROTEIN/DNA / clamp loader / DNA clamp / AAA+ / ATPase / DNA BINDING PROTEIN-DNA complex | ||||||
Function / homology | ![]() DNA polymerase III, clamp loader complex / Hda-beta clamp complex / bacterial-type DNA replication / replication inhibiting complex / DNA clamp loader activity / DNA polymerase III complex / replisome / regulation of DNA-templated DNA replication initiation / DNA strand elongation involved in DNA replication / DNA polymerase processivity factor activity ...DNA polymerase III, clamp loader complex / Hda-beta clamp complex / bacterial-type DNA replication / replication inhibiting complex / DNA clamp loader activity / DNA polymerase III complex / replisome / regulation of DNA-templated DNA replication initiation / DNA strand elongation involved in DNA replication / DNA polymerase processivity factor activity / error-prone translesion synthesis / negative regulation of DNA-templated DNA replication initiation / 3'-5' exonuclease activity / ribonucleoside triphosphate phosphatase activity / response to radiation / DNA-templated DNA replication / DNA replication / DNA-directed DNA polymerase / DNA-directed DNA polymerase activity / DNA repair / DNA damage response / protein homodimerization activity / ATP hydrolysis activity / DNA binding / ATP binding / identical protein binding / cytosol Similarity search - Function | ||||||
Biological species | ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.7 Å | ||||||
![]() | Oakley, A.J. / Xu, Z.-Q. / Dixon, N.E. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Structural characterisation of the complete cycle of sliding clamp loading in E. coli Authors: Xu, Z.-Q. / Oakley, A.J. / Dixon, N.E. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 992.1 KB | Display | ![]() |
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PDB format | ![]() | 688.1 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 1.5 MB | Display | ![]() |
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Full document | ![]() | 1.5 MB | Display | |
Data in XML | ![]() | 72 KB | Display | |
Data in CIF | ![]() | 107.1 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 40079MC ![]() 8gizC ![]() 8gj0C ![]() 8gj1C ![]() 8gj2C ![]() 8gj3C M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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1 |
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Components
-DNA polymerase III subunit ... , 4 types, 6 molecules ABCDEF
#1: Protein | Mass: 38745.574 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() | ||||
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#2: Protein | Mass: 47601.766 Da / Num. of mol.: 3 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() #3: Protein | | Mass: 36980.484 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() #4: Protein | | Mass: 15188.276 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
-Protein , 1 types, 2 molecules HI
#5: Protein | Mass: 40630.508 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
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-Non-polymers , 3 types, 10 molecules ![](data/chem/img/AGS.gif)
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#6: Chemical | #7: Chemical | #8: Chemical | ChemComp-ZN / |
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-Details
Has ligand of interest | N |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: E. coli clamp loader with closed clamp / Type: COMPLEX Details: Clamp loader complex composed of DNA polymerase III delta gamma(3) delta' chi and psi subunits. Clamp composed of DNA polymerase III beta(2) subunits. Entity ID: #1-#5 / Source: RECOMBINANT | |||||||||||||||||||||||||||||||||||
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Molecular weight | Value: 0.331 MDa / Experimental value: NO | |||||||||||||||||||||||||||||||||||
Source (natural) | Organism: ![]() ![]() | |||||||||||||||||||||||||||||||||||
Source (recombinant) | Organism: ![]() ![]() | |||||||||||||||||||||||||||||||||||
Buffer solution | pH: 7.5 Details: 30 mM Na.HEPES pH 7.5, 3 mM MgCl2, 2 mM dithiothreitol, 0.25 mM EDTA, 2% glycerol, 1 mM ATPgammaS. | |||||||||||||||||||||||||||||||||||
Buffer component |
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Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES Details: 30 microL of 6 microM delta/gamma3/delta' mixed with chi/psi complex at a molar ratio of 1:1.2, beta2 at 1:1.3, and dialysed twice at 4 degrees C against 250 mL of 30 mM Na.HEPES pH 7.5, 3 ...Details: 30 microL of 6 microM delta/gamma3/delta' mixed with chi/psi complex at a molar ratio of 1:1.2, beta2 at 1:1.3, and dialysed twice at 4 degrees C against 250 mL of 30 mM Na.HEPES pH 7.5, 3 mM MgCl2, 2 mM dithiothreitol, 0.25 mM EDTA, 2% glycerol. 1 mM ATPgammaS was added to the dialysate. | |||||||||||||||||||||||||||||||||||
Specimen support | Details: Use a Zepto Low-pressure plasma systems (PLASMA CLEANER) (Diener Electronic) at 10% power for 120 seconds. Grid material: GOLD / Grid type: Quantifoil R1.2/1.3 | |||||||||||||||||||||||||||||||||||
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 279 K |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 165000 X / Nominal defocus max: 1300 nm / Nominal defocus min: 400 nm / Cs: 2.7 mm / C2 aperture diameter: 70 µm / Alignment procedure: COMA FREE |
Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Image recording | Average exposure time: 6 sec. / Electron dose: 50 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 1 / Num. of real images: 7269 |
EM imaging optics | Energyfilter name: GIF Bioquantum / Details: unfiltered mode |
Image scans | Width: 4096 / Height: 4096 / Movie frames/image: 60 / Used frames/image: 1-60 |
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Processing
Software |
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EM software |
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CTF correction | Details: CTF refinement per-particle was performed in RELION before final 3D reconstruction. Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||
Particle selection | Num. of particles selected: 1376000 | ||||||||||||||||||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 3.7 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 373000 / Algorithm: BACK PROJECTION / Num. of class averages: 2 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||||||
Atomic model building | Protocol: RIGID BODY FIT | ||||||||||||||||||||||||||||||||||||||||
Atomic model building |
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Refinement | Cross valid method: NONE Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2 | ||||||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso mean: 271.99 Å2 | ||||||||||||||||||||||||||||||||||||||||
Refine LS restraints |
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