Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.196 
  • R-Value Work: 0.147 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


The two types of 3-dehydroquinase have distinct structures but catalyze the same overall reaction.

Gourley, D.G.Shrive, A.K.Polikarpov, I.Krell, T.Coggins, J.R.Hawkins, A.R.Isaacs, N.W.Sawyer, L.

(1999) Nat Struct Biol 6: 521-525

  • DOI: https://doi.org/10.1038/9287
  • Primary Citation of Related Structures:  
    1QFE, 2DHQ

  • PubMed Abstract: 

    The structures of enzymes catalyzing the reactions in central metabolic pathways are generally well conserved as are their catalytic mechanisms. The two types of 3-dehydroquinate dehydratase (DHQase) are therefore most unusual since they are unrelated at the sequence level and they utilize completely different mechanisms to catalyze the same overall reaction. The type I enzymes catalyze a cis-dehydration of 3-dehydroquinate via a covalent imine intermediate, while the type II enzymes catalyze a trans-dehydration via an enolate intermediate. Here we report the three-dimensional structures of a representative member of each type of biosynthetic DHQase. Both enzymes function as part of the shikimate pathway, which is essential in microorganisms and plants for the biosynthesis of aromatic compounds including folate, ubiquinone and the aromatic amino acids. An explanation for the presence of two different enzymes catalyzing the same reaction is presented. The absence of the shikimate pathway in animals makes it an attractive target for antimicrobial agents. The availability of these two structures opens the way for the design of highly specific enzyme inhibitors with potential importance as selective therapeutic agents.

  • Organizational Affiliation

    Division of Biochemistry and Molecular Biology, Institute of Biomedical and Life Sciences, University of Glasgow, Scotland, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PROTEIN (3-DEHYDROQUINATE DEHYDRATASE)146Mycobacterium tuberculosis H37RvMutation(s): 0 
Find proteins for P9WPX7 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WPX7 
Go to UniProtKB:  P9WPX7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP9WPX7
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.196 
  • R-Value Work: 0.147 
  • Space Group: F 2 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 127.68α = 90
b = 127.68β = 90
c = 127.68γ = 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: 1999-05-27
    Type: Initial release
  • Version 1.1: 2008-04-26
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2023-12-27
    Changes: Data collection, Database references