1DKN

CRYSTAL STRUCTURE OF ESCHERICHIA COLI PHYTASE AT PH 5.0 WITH HG2+ CATION ACTING AS AN INTERMOLECULAR BRIDGE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.223 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structures of Escherichia coli phytase and its complex with phytate.

Lim, D.Golovan, S.Forsberg, C.W.Jia, Z.

(2000) Nat.Struct.Mol.Biol. 7: 108-113

  • DOI: 10.1038/72371
  • Primary Citation of Related Structures:  1DKL, 1DKM, 1DKO, 1DKP, 1DKQ

  • PubMed Abstract: 
  • Phytases catalyze the hydrolysis of phytate and are able to improve the nutritional quality of phytate-rich diets. Escherichia coli phytase, a member of the histidine acid phosphatase family has the highest specific activity of all phytases character ...

    Phytases catalyze the hydrolysis of phytate and are able to improve the nutritional quality of phytate-rich diets. Escherichia coli phytase, a member of the histidine acid phosphatase family has the highest specific activity of all phytases characterized. The crystal structure of E. coli phytase has been determined by a two-wavelength anomalous diffraction method using the exceptionally strong anomalous scattering of tungsten. Despite a lack of sequence similarity, the structure closely resembles the overall fold of other histidine acid phosphatases. The structure of E. coli phytase in complex with phytate, the preferred substrate, reveals the binding mode and substrate recognition. The binding is also accompanied by conformational changes which suggest that substrate binding enhances catalysis by increasing the acidity of the general acid.


    Related Citations: 
    • Purification, Crystallization and Preliminary X-ray Analysis of the Escherichia coli Phytase
      Jia, Z.,Golovan, S.,Ye, Q.,Forsberg, C.W.
      (1998) Acta Crystallogr.,Sect.D 54: 647
    • The Complete Nucleotide Sequence of the Escherichia coli Gene appA Reveals Significant Homology Between pH 2.5 Acid Phosphatase and Glucose-1-phosphatase
      Dassa, J.,Marck, C.,Boquet, P.L.
      (1990) J.Bacteriol. 172: 5497


    Organizational Affiliation

    Department of Biochemistry, Queen's University, Kingston, Ontario K7L 3N6, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PHYTASE
A
410Escherichia coli (strain K12)Gene Names: appA
EC: 3.1.3.2, 3.1.3.26
Find proteins for P07102 (Escherichia coli (strain K12))
Go to UniProtKB:  P07102
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HG
Query on HG

Download SDF File 
Download CCD File 
A
MERCURY (II) ION
Hg
BQPIGGFYSBELGY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.223 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 70.443α = 90.00
b = 74.701β = 90.00
c = 89.829γ = 90.00
Software Package:
Software NamePurpose
XTALVIEWrefinement
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-08-03
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance