Experimental Data Snapshot

  • Resolution: 2.45 Å
  • R-Value Work: 0.177 
  • R-Value Observed: 0.177 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Pressure-induced activation of latent dihydroorotase from Aquifex aeolicus as revealed by high pressure protein crystallography.

Prange, T.Girard, E.Fourme, R.Dhaussy, A.C.Edwards, B.Vaishnav, A.Patel, C.Guy-Evans, H.Herve, G.Evans, D.R.

(2019) FEBS J 286: 1204-1213

  • DOI: https://doi.org/10.1111/febs.14758
  • Primary Citation of Related Structures:  
    6GDD, 6GDE, 6GDF

  • PubMed Abstract: 

    Dihydroorotase (DHOase) is involved in the de novo synthesis of pyrimidine in virtually all organisms, and it is usually associated with two other enzymes found in this biosynthetic pathway, carbamylphosphate synthetase and/or aspartate transcarbamylase (ATCase). In the hyperthermophilic bacterium Aquifex aeolicus, ATCase and DHOase are noncovalently associated. Upon dissociation, ATCase keeps its activity entirely while DHOase is totally inactivated. It was previously shown that high pressure fully restores the activity of this isolated DHOase. On the basis of kinetic studies, site-directed mutagenesis and the use of peptides mimicking loop A, a loop that appears to block access to the active site, was proposed that this pressure-induced reactivation was due to the decrease in the volume of the system, -ΔV, resulting from the disruption of known ionic interactions between the loop and the main part of the protein. In this study, this interpretation is more precisely demonstrated by the determination of the crystallographic structure of isolated DHOase under pressure. In addition to the loop displacements, pressure induces a discrete rearrangement of the catalytic site aspartate 305, an effect that might additionally contribute to the reactivation of this enzyme.

  • Organizational Affiliation

    Laboratoire de Cristallographie & RMN biologiques (UMR 8015 CNRS), Paris, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Dihydroorotase423Aquifex aeolicus VF5Mutation(s): 0 
Gene Names: pyrCaq_806
Find proteins for O66990 (Aquifex aeolicus (strain VF5))
Explore O66990 
Go to UniProtKB:  O66990
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO66990
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on ZN

Download Ideal Coordinates CCD File 
B [auth A]ZINC ION
Experimental Data & Validation

Experimental Data

  • Resolution: 2.45 Å
  • R-Value Work: 0.177 
  • R-Value Observed: 0.177 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 91.229α = 90
b = 177.557β = 90
c = 66.336γ = 90
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: 2019-01-30
    Type: Initial release
  • Version 1.1: 2019-03-27
    Changes: Data collection, Database references
  • Version 1.2: 2024-01-17
    Changes: Data collection, Database references, Refinement description