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 

Starting Models: experimental
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This is version 1.5 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: https://doi.org/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). 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
MoleculeChains Sequence LengthOrganismDetailsImage
Activator 1 95 kDa subunit516Saccharomyces 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
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP38630
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Activator 1 37 kDa subunit323Saccharomyces cerevisiaeMutation(s): 1 
Gene Names: RFC4YOL094CO0923
UniProt
Find proteins for P40339 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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UniProt GroupP40339
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Activator 1 40 kDa subunit340Saccharomyces cerevisiaeMutation(s): 1 
Gene Names: RFC3YNL290WN0533
UniProt
Find proteins for P38629 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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UniProt GroupP38629
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Activator 1 41 kDa subunit353Saccharomyces cerevisiaeMutation(s): 1 
Gene Names: RFC2YJR068WJ1808
UniProt
Find proteins for P40348 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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UniProt GroupP40348
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
Activator 1 40 kDa subunit354Saccharomyces cerevisiaeMutation(s): 1 
Gene Names: RFC5YBR087WYBR0810
UniProt
Find proteins for P38251 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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UniProt GroupP38251
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
Proliferating cell nuclear antigen
F, G, H
283Saccharomyces cerevisiaeMutation(s): 6 
Gene Names: POL30YBR088CYBR0811
UniProt
Find proteins for P15873 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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UniProt GroupP15873
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Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
AGS
Query on AGS

Download Ideal Coordinates CCD File 
J [auth A],
L [auth B],
N [auth C],
P [auth D]
PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER
C10 H16 N5 O12 P3 S
NLTUCYMLOPLUHL-KQYNXXCUSA-N
ADP
Query on ADP

Download Ideal Coordinates CCD File 
Q [auth E]ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
MG
Query on MG

Download Ideal Coordinates CCD File 
I [auth A],
K [auth B],
M [auth C],
O [auth D]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
MSE
Query on MSE
F, G, H
L-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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Ligand Structure Quality Assessment 


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
  • Version 1.3: 2021-10-27
    Changes: Database references, Derived calculations
  • Version 1.4: 2023-08-23
    Changes: Data collection, Refinement description
  • Version 1.5: 2023-11-15
    Changes: Data collection