1GQN

Native 3-dehydroquinase from Salmonella typhi


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.78 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.199 

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This is version 1.3 of the entry. See complete history


Literature

Comparison of Different Crystal Forms of 3-Dehydroquinase from Salmonella Typhi and its Implications for Enzyme Activity

Lee, W.-H.Perles, L.A.Shrive, A.K.Hawkins, A.Sawyer, L.Polikarpov, I.

(2002) Acta Crystallogr D Biol Crystallogr 58: 798

  • DOI: 10.1107/s0907444902003918
  • Primary Citation of Related Structures:  
    1L9W, 1GQN

  • PubMed Abstract: 
  • The type I 3-dehydroquinate dehydratase (DHQase) which catalyses the reversible dehydration of 3-dehydroquinic acid to 3-dehydroshikimic acid is involved in the shikimate pathway for the biosynthesis of aromatic compounds. The shikimate pathway is absent in mammals, which makes structural information about DHQase vital for the rational design of antimicrobial drugs and herbicides ...

    The type I 3-dehydroquinate dehydratase (DHQase) which catalyses the reversible dehydration of 3-dehydroquinic acid to 3-dehydroshikimic acid is involved in the shikimate pathway for the biosynthesis of aromatic compounds. The shikimate pathway is absent in mammals, which makes structural information about DHQase vital for the rational design of antimicrobial drugs and herbicides. The crystallographic structure of the type I DHQase from Salmonella typhi has now been determined for the native form at 1.78 A resolution (R = 19.9%; R(free) = 24.7%). The structure of the modified enzyme to which the product has been covalently bound has also been determined but in a different crystal form (2.1 A resolution; R = 17.7%; R(free) = 24.5%). An analysis of the three available crystal forms has provided information about the physiological dimer interface. The enzyme relies upon the closure of a lid-like loop to complete its active site. As the lid-loop tends to stay in the closed position, dimerization appears to play a role in biasing the arrangement of the loop towards its open position, thus facilitating substrate access.


    Organizational Affiliation

    Laboratório Nacional de Luz Síncrotron/LNLS, Campinas, SP, Brazil.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
3-DEHYDROQUINATE DEHYDRATASE A252Salmonella enterica subsp. enterica serovar TyphiMutation(s): 0 
Gene Names: aroDSTY1760t1231
EC: 4.2.1.10
Find proteins for P24670 (Salmonella typhi)
Explore P24670 
Go to UniProtKB:  P24670
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.78 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.199 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48.78α = 90
b = 112.33β = 90
c = 42.94γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-11-20
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-07-24
    Changes: Data collection