2HK8

Crystal structure of shikimate dehydrogenase from aquifex aeolicus at 2.35 angstrom resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.214 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural and biochemical analyses of shikimate dehydrogenase AroE from Aquifex aeolicus: implications for the catalytic mechanism.

Gan, J.Wu, Y.Prabakaran, P.Gu, Y.Li, Y.Andrykovitch, M.Liu, H.Gong, Y.Yan, H.Ji, X.

(2007) Biochemistry 46: 9513-9522

  • DOI: 10.1021/bi602601e
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The shikimate biosynthetic pathway is essential to microorganisms, plants, and parasites but absent from mammals. Therefore, shikimate dehydrogenase (SD) and other enzymes in the pathway are attractive targets for developing nontoxic antimicrobial ag ...

    The shikimate biosynthetic pathway is essential to microorganisms, plants, and parasites but absent from mammals. Therefore, shikimate dehydrogenase (SD) and other enzymes in the pathway are attractive targets for developing nontoxic antimicrobial agents, herbicides, and antiparasite drugs. SD catalyzes the fourth reaction in the pathway, the nicotinamide adenine dinucleotide phosphate- (NADP-) dependent reduction of 3-dehydroshikimic acid to shikimic acid (SA), as well as its reverse, by the transfer of a hydride. Previous structural studies reveal that the enzyme exists in two major conformations, an open and a closed form. For the reaction to occur, it is believed that the catalytic complex assumes the closed conformation. Nonetheless, the only structure containing both SA and NADP+ exhibits an open conformation (PDB entry 2EV9). Here, we present two crystal structures of Aquifex aeolicus SD, including a ternary complex with both SA and NADP+, which assumes the closed conformation and therefore contains a catalytically competent active site. On the basis of preexisting and novel structural and biochemical data, a catalytic mechanism is proposed.


    Organizational Affiliation

    Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Shikimate dehydrogenaseA, B, C, D, E, F, G, H269Aquifex aeolicusMutation(s): 0 
Gene Names: aroE
EC: 1.1.1.25
Find proteins for O67049 (Aquifex aeolicus (strain VF5))
Explore O67049 
Go to UniProtKB:  O67049
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.214 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 37.361α = 94.64
b = 73.96β = 94.16
c = 192.107γ = 91.81
Software Package:
Software NamePurpose
CNSrefinement
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-06-19
    Type: Initial release
  • Version 1.1: 2007-12-12
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance