1JR3

Crystal Structure of the Processivity Clamp Loader Gamma Complex of E. coli DNA Polymerase III

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.268 

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This is version 1.3 of the entry. See complete history. 


Literature

Crystal structure of the processivity clamp loader gamma (gamma) complex of E. coli DNA polymerase III.

Jeruzalmi, D., O'Donnell, M., Kuriyan, J.

(2001) Cell 106: 429-441

  • DOI: 10.1016/s0092-8674(01)00463-9
  • Primary Citation of Related Structures:  
    1JR3

  • PubMed Abstract: 

    • The gamma complex, an AAA+ ATPase, is the bacterial homolog of eukaryotic replication factor C (RFC) that loads the sliding clamp (beta, homologous to PCNA) onto DNA. The 2.7/3.0 A crystal structure of gamma complex reveals a pentameric arrangement of subunits, with stoichiometry delta':gamma(3):delta ...

    The gamma complex, an AAA+ ATPase, is the bacterial homolog of eukaryotic replication factor C (RFC) that loads the sliding clamp (beta, homologous to PCNA) onto DNA. The 2.7/3.0 A crystal structure of gamma complex reveals a pentameric arrangement of subunits, with stoichiometry delta':gamma(3):delta. The C-terminal domains of the subunits form a circular collar that supports an asymmetric arrangement of the N-terminal ATP binding domains of the gamma motor and the structurally related domains of the delta' stator and the delta wrench. The structure suggests a mechanism by which the gamma complex switches between a closed state, in which the beta-interacting element of delta is hidden by delta', and an open form similar to the crystal structure, in which delta is free to bind to beta.

    Organizational Affiliation: 

    Howard Hughes Medical Institute, The Rockefeller University, 1230 York Avenue, New York, NY 10021, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA polymerase III subunit gammaA, B, C373Escherichia coliMutation(s): 0 
EC: 2.7.7.7
UniProt
Find proteins for P06710 (Escherichia coli (strain K12))
Explore P06710 
Go to UniProtKB:  P06710
Entity Groups  
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UniProt GroupP06710
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
DNA polymerase III, delta subunitD343Escherichia coliMutation(s): 0 
EC: 2.7.7.7
UniProt
Find proteins for P28630 (Escherichia coli (strain K12))
Explore P28630 
Go to UniProtKB:  P28630
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UniProt GroupP28630
Protein Feature View
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
DNA polymerase III, delta' subunitE334Escherichia coliMutation(s): 0 
EC: 2.7.7.7
UniProt
Find proteins for P28631 (Escherichia coli (strain K12))
Explore P28631 
Go to UniProtKB:  P28631
Entity Groups  
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UniProt GroupP28631
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.268 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 95.698α = 90
b = 95.857β = 90
c = 285.41γ = 90
Software Package:
Software NamePurpose
MLPHAREphasing
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-09-26
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-01-31
    Changes: Experimental preparation