1SXJ

Crystal Structure of the Eukaryotic Clamp Loader (Replication Factor C, RFC) Bound to the DNA Sliding Clamp (Proliferating Cell Nuclear Antigen, PCNA)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.306 
  • R-Value Work: 0.251 
  • R-Value Observed: 0.251 

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This is version 1.2 of the entry. See complete history


Literature

Structural analysis of a eukaryotic sliding DNA clamp-clamp loader complex.

Bowman, G.D.O'Donnell, M.Kuriyan, J.

(2004) Nature 429: 724-730

  • DOI: 10.1038/nature02585
  • Primary Citation of Related Structures:  
    1SXJ

  • PubMed Abstract: 
  • Sliding clamps are ring-shaped proteins that encircle DNA and confer high processivity on DNA polymerases. Here we report the crystal structure of the five-protein clamp loader complex (replication factor-C, RFC) of the yeast Saccharomyces cerevisiae, bound to the sliding clamp (proliferating cell nuclear antigen, PCNA) ...

    Sliding clamps are ring-shaped proteins that encircle DNA and confer high processivity on DNA polymerases. Here we report the crystal structure of the five-protein clamp loader complex (replication factor-C, RFC) of the yeast Saccharomyces cerevisiae, bound to the sliding clamp (proliferating cell nuclear antigen, PCNA). Tight interfacial coordination of the ATP analogue ATP-gammaS by RFC results in a spiral arrangement of the ATPase domains of the clamp loader above the PCNA ring. Placement of a model for primed DNA within the central hole of PCNA reveals a striking correspondence between the RFC spiral and the grooves of the DNA double helix. This model, in which the clamp loader complex locks onto primed DNA in a screw-cap-like arrangement, provides a simple explanation for the process by which the engagement of primer-template junctions by the RFC:PCNA complex results in ATP hydrolysis and release of the sliding clamp on DNA.


    Organizational Affiliation

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



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Activator 1 95 kDa subunitA516Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: RFC1CDC44YOR217WYOR50-7
UniProt
Find proteins for P38630 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Go to UniProtKB:  P38630
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Activator 1 37 kDa subunitB323Saccharomyces cerevisiaeMutation(s): 1 
Gene Names: RFC4YOL094CO0923
UniProt
Find proteins for P40339 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Activator 1 40 kDa subunitC340Saccharomyces cerevisiaeMutation(s): 1 
Gene Names: RFC3YNL290WN0533
UniProt
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Activator 1 41 kDa subunitD353Saccharomyces cerevisiaeMutation(s): 1 
Gene Names: RFC2YJR068WJ1808
UniProt
Find proteins for P40348 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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  • Reference Sequence
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Activator 1 40 kDa subunitE354Saccharomyces cerevisiaeMutation(s): 1 
Gene Names: RFC5YBR087WYBR0810
UniProt
Find proteins for P38251 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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  • Reference Sequence
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
Proliferating cell nuclear antigenF, G, H283Saccharomyces cerevisiaeMutation(s): 6 
Gene Names: POL30YBR088CYBR0811
UniProt
Find proteins for P15873 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
F, G, HL-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.306 
  • R-Value Work: 0.251 
  • R-Value Observed: 0.251 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 104.209α = 90
b = 110.481β = 90
c = 268.206γ = 90
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data reduction
SCALEPACKdata scaling
SOLVEphasing
SHARPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-06-22
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance