1GE8

PROLIFERATING CELL NUCLEAR ANTIGEN (PCNA) HOMOLOG FROM PYROCOCCUS FURIOSUS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.228 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal structure of an archaeal DNA sliding clamp: proliferating cell nuclear antigen from Pyrococcus furiosus.

Matsumiya, S.Ishino, Y.Morikawa, K.

(2001) Protein Sci 10: 17-23

  • DOI: 10.1110/ps.36401
  • Primary Citation of Related Structures:  
    1GE8

  • PubMed Abstract: 
  • The proliferating cell nuclear antigen (PCNA) is now recognized as one of the key proteins in DNA metabolic events because of its direct interactions with many proteins involved in important cellular processes. We have determined the crystal structure of PCNA from a hyperthermophilic archaeon, Pyrococcus furiosus (pfuPCNA), at 2 ...

    The proliferating cell nuclear antigen (PCNA) is now recognized as one of the key proteins in DNA metabolic events because of its direct interactions with many proteins involved in important cellular processes. We have determined the crystal structure of PCNA from a hyperthermophilic archaeon, Pyrococcus furiosus (pfuPCNA), at 2.1 A resolution. pfuPCNA forms a toroidal, ring-shaped structure consisting of homotrimeric molecules, which is also observed in the PCNA crystals from human and yeast. The overall structure of pfuPCNA is highly conserved with other PCNA proteins, as well as with the bacterial ss clamp and the bacteriophage gp45. This result shows that the three-dimensional structure of the sliding clamp is conserved in the three domains of life. pfuPCNA has two remarkable features compared with the human and yeast PCNA molecules: it has more ion pairs and fewer intermolecular main chain hydrogen bonds. The former may contribute to the thermal stability of pfuPCNA, and the latter may be the cause of the stimulatory effect of pfuPCNA on the DNA synthesizing activity of P. furiosus DNA polymerases in the absence of the clamp loader replication factor C in vitro.


    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROLIFERATION CELL NUCLEAR ANTIGENA249Pyrococcus furiosusMutation(s): 1 
UniProt
Find proteins for O73947 (Pyrococcus furiosus (strain ATCC 43587 / DSM 3638 / JCM 8422 / Vc1))
Explore O73947 
Go to UniProtKB:  O73947
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.228 
  • Space Group: P 63
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 89.682α = 90
b = 89.682β = 90
c = 63.269γ = 120
Software Package:
Software NamePurpose
AMoREphasing
CNSrefinement
MOSFLMdata reduction
CCP4data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-01-24
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance