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 

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This is version 2.0 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 U S A 98: 13425

  • DOI: 10.1073/pnas.231473698
  • Primary Citation of Related Structures:  
    1HG8

  • 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), found in the cell wall of many plants, counteract fungal PGs by forming specific complexes with them ...

    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 D Biol Crystallogr 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: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ENDOPOLYGALACTURONASE A349Fusarium verticillioidesMutation(s): 0 
EC: 3.2.1.15
Find proteins for Q07181 (Gibberella fujikuroi)
Explore Q07181 
Go to UniProtKB:  Q07181
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
B
2 N-Glycosylation Oligosaccharides Interaction
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG
Download Ideal Coordinates CCD File 
A
2-acetamido-2-deoxy-beta-D-glucopyranose
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 = 58.26α = 90
b = 61.59β = 90
c = 98.86γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
SHELXphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-11-10
    Type: Initial release
  • Version 1.1: 2014-02-19
    Changes: Database references, Derived calculations, Other, Version format compliance
  • Version 1.2: 2019-05-22
    Changes: Data collection, Derived calculations, Other, Refinement description
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary