1CI1

CRYSTAL STRUCTURE OF TRIOSEPHOSPHATE ISOMERASE FROM TRYPANOSOMA CRUZI IN HEXANE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.181 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal structure of triosephosphate isomerase from Trypanosoma cruzi in hexane.

Gao, X.G.Maldonado, E.Perez-Montfort, R.Garza-Ramos, G.de Gomez-Puyou, M.T.Gomez-Puyou, A.Rodriguez-Romero, A.

(1999) Proc.Natl.Acad.Sci.USA 96: 10062-10067

  • DOI: 10.1073/pnas.96.18.10062

  • PubMed Abstract: 
  • To gain insight into the mechanisms of enzyme catalysis in organic solvents, the x-ray structure of some monomeric enzymes in organic solvents was determined. However, it remained to be explored whether the structure of oligomeric proteins is also am ...

    To gain insight into the mechanisms of enzyme catalysis in organic solvents, the x-ray structure of some monomeric enzymes in organic solvents was determined. However, it remained to be explored whether the structure of oligomeric proteins is also amenable to such analysis. The field acquired new perspectives when it was proposed that the x-ray structure of enzymes in nonaqueous media could reveal binding sites for organic solvents that in principle could represent the starting point for drug design. Here, a crystal of the dimeric enzyme triosephosphate isomerase from the pathogenic parasite Trypanosoma cruzi was soaked and diffracted in hexane and its structure solved at 2-A resolution. Its overall structure and the dimer interface were not altered by hexane. However, there were differences in the orientation of the side chains of several amino acids, including that of the catalytic Glu-168 in one of the monomers. No hexane molecules were detected in the active site or in the dimer interface. However, three hexane molecules were identified on the surface of the protein at sites, which in the native crystal did not have water molecules. The number of water molecules in the hexane structure was higher than in the native crystal. Two hexanes localized at <4 A from residues that form the dimer interface; they were in close proximity to a site that has been considered a potential target for drug design.


    Related Citations: 
    • Differences in the intersubunit contacts in triosephosphate isomerase from two closely related pathogenic trypanosomes.
      Maldonado, E.,Soriano-Garcia, M.,Moreno, A.,Cabrera, N.,Garza-Ramos, G.,de Gomez-Puyou, M.,Gomez-Puyou, A.,Perez-Montfort, R.
      (1998) J.Mol.Biol. 283: 193


    Organizational Affiliation

    Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, 04510 México D. F., Mexico.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (TRIOSEPHOSPHATE ISOMERASE)
A, B
251Trypanosoma cruziMutation(s): 0 
EC: 5.3.1.1
Find proteins for P52270 (Trypanosoma cruzi)
Go to UniProtKB:  P52270
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEX
Query on HEX

Download SDF File 
Download CCD File 
B
HEXANE
C6 H14
VLKZOEOYAKHREP-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.181 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 43.656α = 90.00
b = 77.650β = 90.00
c = 149.211γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
X-PLORrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-09-01
    Type: Initial release
  • Version 1.1: 2007-10-16
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.3: 2019-11-20
    Type: Database references