4D48

Crystal Structure of glucose-1-phosphate uridylyltransferase GalU from Erwinia amylovora.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.46 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.244 
  • R-Value Observed: 0.245 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Glucose-1-phosphate uridylyltransferase from Erwinia amylovora: Activity, structure and substrate specificity.

Benini, S.Toccafondi, M.Rejzek, M.Musiani, F.Wagstaff, B.A.Wuerges, J.Cianci, M.Field, R.A.

(2017) Biochim Biophys Acta 1865: 1348-1357

  • DOI: 10.1016/j.bbapap.2017.08.015
  • Primary Citation of Related Structures:  
    4D48

  • PubMed Abstract: 
  • Erwinia amylovora, a Gram-negative plant pathogen, is the causal agent of Fire Blight, a contagious necrotic disease affecting plants belonging to the Rosaceae family, including apple and pear. E. amylovora is highly virulent and capable of rapid dissemination in orchards; effective control methods are still lacking ...

    Erwinia amylovora, a Gram-negative plant pathogen, is the causal agent of Fire Blight, a contagious necrotic disease affecting plants belonging to the Rosaceae family, including apple and pear. E. amylovora is highly virulent and capable of rapid dissemination in orchards; effective control methods are still lacking. One of its most important pathogenicity factors is the exopolysaccharide amylovoran. Amylovoran is a branched polymer made by the repetition of units mainly composed of galactose, with some residues of glucose, glucuronic acid and pyruvate. E. amylovora glucose-1-phosphate uridylyltransferase (UDP-glucose pyrophosphorylase, EC 2.7.7.9) has a key role in amylovoran biosynthesis. This enzyme catalyses the production of UDP-glucose from glucose-1-phosphate and UTP, which the epimerase GalE converts into UDP-galactose, the main building block of amylovoran. We determined EaGalU kinetic parameters and substrate specificity with a range of sugar 1-phosphates. At time point 120min the enzyme catalysed conversion of the sugar 1-phosphate into the corresponding UDP-sugar reached 74% for N-acetyl-α-d-glucosamine 1-phosphate, 28% for α-d-galactose 1-phosphate, 0% for α-d-galactosamine 1-phosphate, 100% for α-d-xylose 1-phosphate, 100% for α-d-glucosamine 1-phosphate, 70% for α-d-mannose 1-phosphate, and 0% for α-d-galacturonic acid 1-phosphate. To explain our results we obtained the crystal structure of EaGalU and augmented our study by docking the different sugar 1-phosphates into EaGalU active site, providing both reliable models for substrate binding and enzyme specificity, and a rationale that explains the different activity of EaGalU on the sugar 1-phosphates used. These data demonstrate EaGalU potential as a biocatalyst for biotechnological purposes, as an alternative to the enzyme from Escherichia coli, besides playing an important role in E. amylovora pathogenicity.


    Related Citations: 
    • Expression, purification, crystallization and preliminary X-ray analysis of glucose-1-phosphate uridylyltransferase (GalU) from Erwinia amylovora.
      Toccafondi, M., Cianci, M., Benini, S.
      (2014) Acta Crystallogr F Struct Biol Commun 70: 1249

    Organizational Affiliation

    Department of Biological Chemistry, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GLUCOSE-1-PHOSPHATE URIDYLYLTRANSFERASEA, B302Erwinia amylovora CFBP1430Mutation(s): 0 
Gene Names: galUEAMY_1962
EC: 2.7.7.9
UniProt
Find proteins for D4I3X5 (Erwinia amylovora (strain CFBP1430))
Explore D4I3X5 
Go to UniProtKB:  D4I3X5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupD4I3X5
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.46 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.244 
  • R-Value Observed: 0.245 
  • Space Group: P 62
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 80.673α = 90
b = 80.673β = 90
c = 169.182γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
SCALAdata scaling
BALBESphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-01-20
    Type: Initial release
  • Version 1.1: 2018-03-14
    Changes: Structure summary