1QR7

CRYSTAL STRUCTURE OF PHENYLALANINE-REGULATED 3-DEOXY-D-ARABINO-HEPTULOSONATE-7-PHOSPHATE SYNTHASE FROM ESCHERICHIA COLI COMPLEXED WITH PB2+ AND PEP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.194 

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This is version 1.2 of the entry. See complete history


Literature

Crystal structure of phenylalanine-regulated 3-deoxy-D-arabino-heptulosonate-7-phosphate synthase from Escherichia coli.

Shumilin, I.A.Kretsinger, R.H.Bauerle, R.H.

(1999) Structure 7: 865-875

  • DOI: 10.1016/s0969-2126(99)80109-9
  • Primary Citation of Related Structures:  
    1QR7

  • PubMed Abstract: 
  • In microorganisms and plants the first step in the common pathway leading to the biosynthesis of aromatic compounds is the stereospecific condensation of phosphoenolpyruvate (PEP) and D-erythrose-4-phosphate (E4P) giving rise to 3-deoxy-D-arabino-heptulosonate-7-phosphate (DAHP) ...

    In microorganisms and plants the first step in the common pathway leading to the biosynthesis of aromatic compounds is the stereospecific condensation of phosphoenolpyruvate (PEP) and D-erythrose-4-phosphate (E4P) giving rise to 3-deoxy-D-arabino-heptulosonate-7-phosphate (DAHP). This reaction is catalyzed by DAHP synthase (DAHPS), a metal-activated enzyme, which in microorganisms is the target for negative-feedback regulation by pathway intermediates or by end products. In Escherichia coli there are three DAHPS isoforms, each specifically inhibited by one of the three aromatic amino acids.


    Related Citations: 
    • Purification, crystallization, and preliminary crystallographic analysis of 3- deoxy-D-arabino-heptulosonate-7-phosphate synthase from Escherichia coli
      Shumilin, I.A., Kretsinger, R.H., Bauerle, R.H.
      (1996) Proteins 24: 404

    Organizational Affiliation

    Department of Biology, University of Virginia, Charlottesville 22903, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PHENYLALANINE-REGULATED 3-DEOXY-D-ARABINO-HEPTULOSONATE-7-PHOSPHATE SYNTHASEA, B, C, D350Escherichia coliMutation(s): 0 
EC: 4.1.2.15 (PDB Primary Data), 2.5.1.54 (UniProt)
UniProt
Find proteins for P0AB91 (Escherichia coli (strain K12))
Explore P0AB91 
Go to UniProtKB:  P0AB91
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.194 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 211.731α = 90
b = 51.326β = 116.43
c = 148.099γ = 90
Software Package:
Software NamePurpose
MLPHAREphasing
DMmodel building
SHELXSphasing
REFMACrefinement
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling
CCP4data scaling
DMphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1999-08-31
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance