Crystal Structure of the Clamp Loader Small Subunit from Pyrococcus furiosus

Experimental Data Snapshot

  • Resolution: 2.80 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.224 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Atomic Structure of the Clamp Loader Small Subunit from Pyrococcus furiosus

Oyama, T.Ishino, Y.Cann, I.K.O.Ishino, S.Morikawa, K.

(2001) Mol Cell 8: 455-463

  • DOI: https://doi.org/10.1016/s1097-2765(01)00328-8
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    In eukaryotic DNA replication, replication factor-C (RFC) acts as the clamp loader, which correctly installs the sliding clamp onto DNA strands at replication forks. The eukaryotic RFC is a complex consisting of one large and four small subunits. We have determined the crystal structure of the clamp loader small subunit (RFCS) from Pyrococcus furiosus. The six subunits, of which four bind ADP in their canonical nucleotide binding clefts, assemble into a dimer of semicircular trimers. The crescent-like architecture of each subunit formed by the three domains resembles that of the delta' subunit of the E. coli clamp loader. The trimeric architecture of archaeal RFCS, with its mobile N-terminal domains, involves intersubunit interactions that may be conserved in eukaryotic functional complexes.

  • Organizational Affiliation

    Department of Structural Biology and, Biomolecular Engineering Research Institute, 6-2-3 Furuedai, Suita-City, 565-0874, Osaka, Japan.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D, E
A, B, C, D, E, F
327Pyrococcus furiosusMutation(s): 0 
Gene Names: rfcS
Find proteins for Q8U4J3 (Pyrococcus furiosus (strain ATCC 43587 / DSM 3638 / JCM 8422 / Vc1))
Explore Q8U4J3 
Go to UniProtKB:  Q8U4J3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8U4J3
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.80 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.224 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 98.361α = 90
b = 105.608β = 90
c = 316.898γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-09-19
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance