PurE (N5-carboxyaminoimidazole Ribonucleotide Mutase) from the acidophile Acetobacter aceti

Experimental Data Snapshot

  • Resolution: 1.55 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.189 

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This is version 1.2 of the entry. See complete history


Acidophilic adaptations in the structure of Acetobacter aceti N5-carboxyaminoimidazole ribonucleotide mutase (PurE).

Settembre, E.C.Chittuluru, J.R.Mill, C.P.Kappock, T.J.Ealick, S.E.

(2004) Acta Crystallogr D Biol Crystallogr 60: 1753-1760

  • DOI: https://doi.org/10.1107/S090744490401858X
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The crystal structure of Acetobacter aceti PurE was determined to a resolution of 1.55 A and is compared with the known structures of the class I PurEs from a mesophile, Escherichia coli, and a thermophile, Thermotoga maritima. Analyses of the general factors that increase protein stability are examined as potential explanations for the acid stability of A. aceti PurE. Increased inter-subunit hydrogen bonding and an increased number of arginine-containing salt bridges appear to account for the bulk of the increased acid stability. A chain of histidines linking two active sites is discussed in the context of the proton transfers catalyzed by the enzyme.

  • Organizational Affiliation

    Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PurE (N5-carboxyaminoimidazole Ribonucleotide Mutase)
A, B
182Acetobacter acetiMutation(s): 0 
Gene Names: purE
Find proteins for Q2QJL3 (Acetobacter aceti)
Explore Q2QJL3 
Go to UniProtKB:  Q2QJL3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ2QJL3
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.55 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.189 
  • Space Group: I 4 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 99.25α = 90
b = 99.25β = 90
c = 164.81γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-09-28
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance