1HG8

Endopolygalacturonase from the phytopathogenic fungus Fusarium moniliforme


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.73 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.173 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural Requirements of Endopolygalacturonase for the Interaction with Pgip (Polygalacturonase-Inhibiting Protein)

Federici, L.Caprari, C.Mattei, B.Savino, C.Di Matteo, A.De Lorenzo, G.Cervone, F.Tsernoglou, D.

(2001) Proc.Natl.Acad.Sci.USA 98: 13425

  • DOI: 10.1073/pnas.231473698

  • PubMed Abstract: 
  • To invade a plant tissue, phytopathogenic fungi produce several cell wall-degrading enzymes; among them, endopolygalacturonase (PG) catalyzes the fragmentation and solubilization of homogalacturonan. Polygalacturonase-inhibiting proteins (PGIPs), fou ...

    To invade a plant tissue, phytopathogenic fungi produce several cell wall-degrading enzymes; among them, endopolygalacturonase (PG) catalyzes the fragmentation and solubilization of homogalacturonan. Polygalacturonase-inhibiting proteins (PGIPs), found in the cell wall of many plants, counteract fungal PGs by forming specific complexes with them. We report the crystal structure at 1.73 A resolution of PG from the phytopathogenic fungus Fusarium moniliforme (FmPG). The structure of FmPG was useful to study the mode of interaction of the enzyme with PGIP-2 from Phaseolus vulgaris. Several amino acids of FmPG were mutated, and their contribution to the formation of the complex with PGIP-2 was investigated by surface plasmon resonance. The residues Lys-269 and Arg-267, located inside the active site cleft, and His-188, at the edge of the active site cleft, are critical for the formation of the complex, which is consistent with the observed competitive inhibition of the enzyme played by PGIP-2. The replacement of His-188 with a proline or the insertion of a tryptophan after position 270, variations that both occur in plant PGs, interferes with the formation of the complex. We suggest that these variations are important structural requirements of plant PGs to prevent PGIP binding.


    Related Citations: 
    • Crystallization and Preliminary X-Ray Diffraction Study of the Endo-Polygalacturonase from Fusarium Moniliforme.
      Federici, L.,Mattei, B.,Caprari, C.,Savino, C.,Cervone, F.,Tsernoglou, D.
      (1999) Acta Crystallogr.,Sect.D 55: 1359


    Organizational Affiliation

    Dipartimento di Scienze Biochimiche, Università di Roma La Sapienza, Piazzale le Aldo Moro 5, 00185 Rome, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ENDOPOLYGALACTURONASE
A
349Gibberella fujikuroiGene Names: PGA
EC: 3.2.1.15
Find proteins for Q07181 (Gibberella fujikuroi)
Go to UniProtKB:  Q07181
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download SDF File 
Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.73 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.173 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 58.260α = 90.00
b = 61.590β = 90.00
c = 98.860γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
SCALEPACKdata scaling
DENZOdata reduction
SHELXphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-11-10
    Type: Initial release
  • Version 1.1: 2014-02-19
    Type: Database references, Derived calculations, Other, Version format compliance