1NJG

Nucleotide-free form of an Isolated E. coli Clamp Loader Gamma Subunit


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.238 
  • R-Value Observed: 0.238 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Nucleotide-Induced Conformational Changes in an Isolated Escherichia coli DNA Polymerase III Clamp Loader Subunit

Podobnik, M.Weitze, T.F.O'Donnell, M.Kuriyan, J.

(2003) Structure 11: 253-263

  • DOI: 10.1016/s0969-2126(03)00027-3
  • Primary Citation of Related Structures:  
    1NJF, 1NJG

  • PubMed Abstract: 
  • Sliding clamps are loaded onto DNA by ATP-driven clamp loader complexes. The structure of the E. coli clamp loader in a nucleotide-free state has been determined previously. We now report crystal structures of a truncated form of the isolated gamma-ATPase subunit, gamma(1-243), of the E ...

    Sliding clamps are loaded onto DNA by ATP-driven clamp loader complexes. The structure of the E. coli clamp loader in a nucleotide-free state has been determined previously. We now report crystal structures of a truncated form of the isolated gamma-ATPase subunit, gamma(1-243), of the E. coli clamp loader, in nucleotide-free and bound forms. The gamma subunit adopts a defined conformation when empty, in which the nucleotide binding site is blocked. The binding of either ATPgammaS or ADP, which are shown to bind with equal affinity to gamma(1-243), induces a change in the relative orientation of the two domains such that nucleotides can be accommodated. This change would break one of the gamma:gamma interfaces seen in the empty clamp loader complex, and may represent one step in the activation process.


    Organizational Affiliation

    Department of Molecular and Cell Biology, Howard Hughes Medical Institute, University of California, Berkeley, Berkeley, CA 94720, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA polymerase III subunit gammaA, B250Escherichia coliMutation(s): 0 
Gene Names: dnaX
EC: 2.7.7.7
UniProt
Find proteins for P06710 (Escherichia coli (strain K12))
Explore P06710 
Go to UniProtKB:  P06710
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP06710
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.238 
  • R-Value Observed: 0.238 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47.335α = 90
b = 85.471β = 93.15
c = 56.932γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-04-01
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance