3TW5

Crystal structure of the GP42 transglutaminase from Phytophthora sojae

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.95 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.216 

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Literature

Structural and Phylogenetic Analyses of the GP42 Transglutaminase from Phytophthora sojae Reveal an Evolutionary Relationship between Oomycetes and Marine Vibrio Bacteria.

Reiss, K., Kirchner, E., Gijzen, M., Zocher, G., Loffelhardt, B., Nurnberger, T., Stehle, T., Brunner, F.

(2011) J Biol Chem 286: 42585-42593

  • DOI: 10.1074/jbc.M111.290544
  • Primary Citation of Related Structures:  
    3TW5

  • PubMed Abstract: 

    • Transglutaminases (TGases) are ubiquitous enzymes that catalyze selective cross-linking between protein-bound glutamine and lysine residues; the resulting isopeptide bond confers high resistance to proteolysis. Phytophthora sojae, a pathogen of soybean, secretes a Ca(2+)-dependent TGase (GP42) that is activating defense responses in both host and non-host plants ...

    Transglutaminases (TGases) are ubiquitous enzymes that catalyze selective cross-linking between protein-bound glutamine and lysine residues; the resulting isopeptide bond confers high resistance to proteolysis. Phytophthora sojae, a pathogen of soybean, secretes a Ca(2+)-dependent TGase (GP42) that is activating defense responses in both host and non-host plants. A GP42 fragment of 13 amino acids, termed Pep-13, was shown to be absolutely indispensable for both TGase and elicitor activity. GP42 does not share significant primary sequence similarity with known TGases from mammals or bacteria. This suggests that GP42 has evolved novel structural and catalytic features to support enzymatic activity. We have solved the crystal structure of the catalytically inactive point mutant GP42 (C290S) at 2.95 Å resolution and identified residues involved in catalysis by mutational analysis. The protein comprises three domains that assemble into an elongated structure. Although GP42 has no structural homolog, its core region displays significant similarity to the catalytic core of the Mac-1 cysteine protease from Group A Streptococcus, a member of the papain-like superfamily of cysteine proteases. Proteins that are taxonomically related to GP42 are only present in plant pathogenic oomycetes belonging to the order of the Peronosporales (e.g. Phytophthora, Hyaloperonospora, and Pythium spp.) and in marine Vibrio bacteria. This suggests that a lateral gene transfer event may have occurred between bacteria and oomycetes. Our results offer a basis to design and use highly specific inhibitors of the GP42-like TGase family that may impair the growth of important oomycete and bacterial pathogens.

    Organizational Affiliation: 

    Interfakultäres Institut für Biochemie, Universität Tübingen, 72076 Tübingen, Germany.



Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Transglutaminase elicitorA, B367Phytophthora sojaeMutation(s): 1 
Gene Names: gpe1
EC: 2.3.2.13
UniProt
Find proteins for Q01928 (Phytophthora sojae)
Explore Q01928 
Go to UniProtKB:  Q01928
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ01928
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CXS
Query on CXS
Download Ideal Coordinates CCD File 
C [auth A],
D [auth A]		3-CYCLOHEXYL-1-PROPYLSULFONIC ACID
C9 H19 N O3 S
PJWWRFATQTVXHA-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.95 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.216 
  • Space Group: P 62 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 195.48α = 90
b = 195.48β = 90
c = 137.3γ = 120
Software Package:
Software NamePurpose
XDSdata scaling
SHARPphasing
REFMACrefinement
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-10-12
    Type: Initial release
  • Version 1.1: 2011-10-26
    Changes: Database references
  • Version 1.2: 2011-12-21
    Changes: Database references
  • Version 1.3: 2020-10-21
    Changes: Data collection, Database references, Derived calculations