Structure of N-(5'-phosphoribosyl)anthranilate isomerase from Pyrococcus furiosus

Experimental Data Snapshot

  • Resolution: 1.75 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.219 
  • R-Value Observed: 0.221 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


A Monomeric Tim-Barrel Structure from Pyrococcus Furiosus is Optimized for Extreme Temperatures

Repo, H.Oeemig, J.S.Djupsjobacka, J.B.Iwai, H.Heikinheimo, P.

(2012) Acta Crystallogr D Biol Crystallogr 68: 1479

  • DOI: https://doi.org/10.1107/S0907444912037171
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The structure of phosphoribosyl anthranilate isomerase (TrpF) from the hyperthermophilic archaeon Pyrococcus furiosus (PfTrpF) has been determined at 1.75 Å resolution. The PfTrpF structure has a monomeric TIM-barrel fold which differs from the dimeric structures of two other known thermophilic TrpF proteins. A comparison of the PfTrpF structure with the two known bacterial thermophilic TrpF structures and the structure of a related mesophilic protein from Escherichia coli (EcTrpF) is presented. The thermophilic TrpF structures contain a higher proportion of ion pairs and charged residues compared with the mesophilic EcTrpF. These residues contribute to the closure of the central barrel and the stabilization of the barrel and the surrounding α-helices. In the monomeric PfTrpF conserved structural water molecules are mostly absent; instead, the structural waters are replaced by direct side-chain-main-chain interactions. As a consequence of these combined mechanisms, the P. furiosus enzyme is a thermodynamically stable and entropically optimized monomeric TIM-barrel enzyme which defines a good framework for further protein engineering for industrial applications.

  • Organizational Affiliation

    Institute of Biotechnology, University of Helsinki, PO Box 65, FI-00014 Helsinki, Finland.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
N-(5'-PHOSPHORIBOSYL)ANTHRANILATE ISOMERASE228Pyrococcus furiosusMutation(s): 0 
Find proteins for Q8U092 (Pyrococcus furiosus (strain ATCC 43587 / DSM 3638 / JCM 8422 / Vc1))
Explore Q8U092 
Go to UniProtKB:  Q8U092
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8U092
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.75 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.219 
  • R-Value Observed: 0.221 
  • Space Group: P 61
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 105.51α = 90
b = 105.51β = 90
c = 34.46γ = 120
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-10-31
    Type: Initial release
  • Version 1.1: 2012-11-07
    Changes: Database references
  • Version 1.2: 2019-01-30
    Changes: Data collection, Experimental preparation
  • Version 1.3: 2023-12-20
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description