2W1Z

ROP2 from Toxoplasma gondii: A virulence factor with a protein- kinase fold and no enzymatic activity.

• PDB DOI: https://doi.org/10.2210/pdb2W1Z/pdb

• Classification: TRANSFERASE
• Organism(s): Toxoplasma gondii RH
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2008-10-21 Released: 2008-12-09 
• Deposition Author(s): Labesse, G., Gelin, M., Bessin, Y., Lebrun, M., Arold, S.T., Dubremetz, J.-F.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.97 Å
• R-Value Free: 
  0.240 (Depositor), 0.259 (DCC) 
• R-Value Work: 
  0.193 (Depositor), 0.214 (DCC) 
• R-Value Observed: 
  0.196 (Depositor) 

Literature

Rop2 from Toxoplasma Gondii: A Virulence Factor with a Protein-Kinase Fold and No Enzymatic Activity.

Labesse, G., Gelin, M., Bessin, Y., Lebrun, M., Papoin, J., Cerdan, R., Arold, S.T., Dubremetz, J.-F.

(2009) Structure 17: 139

• PubMed: 19141290 
• DOI: https://doi.org/10.1016/j.str.2008.11.005
• Primary Citation of Related Structures:  
  2W1Z


• PubMed Abstract: 
  

  The ROP2 protein and its paralogs are important virulence factors secreted into the host cell by the parasite Toxoplasma gondii. Here we describe the crystal structure of a large and soluble domain of mature ROP2, representative of the ROP2-like protein family. This is a structure of a protein-kinase fold that is devoid of catalytic residues and does not bind ATP. Various structural extensions constitute a signature of this protein family and act to maintain the protein kinase in an open conformation. Our ROP2 structure rules out a previous structural model of attachment of ROP2-like proteins to the parasitophorous vacuole membrane. We propose an alternative mode of membrane attachment implicating basic and amphiphatic helices present in the flexible N terminus of ROP2.

---

Organizational Affiliation: 

Atelier de Bio- et Chimie Informatique Structurale, Centre de Biochimie Structurale, CNRS, UMR5048, Universités Montpellier 1 et 2, F34090 Montpellier, France. [e-mail]

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PQS (software)

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 85.62 kDa 
• Atom Count: 6,430 
• Modelled Residue Count: 712 
• Deposited Residue Count: 736 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ROP2	A, B	368	Toxoplasma gondii RH	Mutation(s): 0  EC: 2.7
UniProt
Find proteins for Q27007 (Toxoplasma gondii) Explore Q27007  Go to UniProtKB:  Q27007

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	C [auth A], D [auth B], E [auth B], F [auth B]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.97 Å
• R-Value Free:  0.240 (Depositor), 0.259 (DCC) 
• R-Value Work:  0.193 (Depositor), 0.214 (DCC) 
• R-Value Observed: 0.196 (Depositor) 

Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 187.609	α = 90
b = 51.348	β = 128.65
c = 125.582	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
SHELXCD	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2008-12-09 
Deposition Author(s): Labesse, G., Gelin, M., Bessin, Y., Lebrun, M., Arold, S.T., Dubremetz, J.-F.

Revision History  

• Version 1.0: 2008-12-09
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Advisory, Version format compliance
• Version 1.2: 2011-09-21
  Changes: Atomic model, Database references, Derived calculations, Refinement description, Structure summary
• Version 1.3: 2024-10-23
  Changes: Data collection, Database references, Derived calculations, Other, Refinement description, Structure summary