4BI7

CRYSTAL STRUCTURE OF A MUTANT (C202A) OF TRIOSEPHOSPHATE ISOMERASE FROM GIARDIA LAMBLIA. COMPLEXED WITH 2-PHOSPHOGLYCOLIC ACID


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.180 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural and Functional Perturbation of Giardia Lamblia Triosephosphate Isomerase by Modification of a Non-Catalytic, Non-Conserved Region.

Hernandez-Alcantara, G.Torres-Larios, A.Enriquez-Flores, S.Garcia-Torres, I.Castillo-Villanueva, A.Mendez, S.T.De La Mora-De La Mora, I.Gomez-Manzo, S.Torres-Arroyo, A.Lopez-Velazquez, G.Reyes-Vivas, H.Oria-Hernandez, J.

(2013) Plos One 8: 69031

  • DOI: 10.1371/journal.pone.0069031
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • We have previously proposed triosephosphate isomerase of Giardia lamblia (GlTIM) as a target for rational drug design against giardiasis, one of the most common parasitic infections in humans. Since the enzyme exists in the parasite and the host, sel ...

    We have previously proposed triosephosphate isomerase of Giardia lamblia (GlTIM) as a target for rational drug design against giardiasis, one of the most common parasitic infections in humans. Since the enzyme exists in the parasite and the host, selective inhibition is a major challenge because essential regions that could be considered molecular targets are highly conserved. Previous biochemical evidence showed that chemical modification of the non-conserved non-catalytic cysteine 222 (C222) inactivates specifically GlTIM. The inactivation correlates with the physicochemical properties of the modifying agent: addition of a non-polar, small chemical group at C222 reduces the enzyme activity by one half, whereas negatively charged, large chemical groups cause full inactivation.


    Organizational Affiliation

    Laboratorio de Bioquímica-Genética, Instituto Nacional de Pediatría, Secretaría de Salud, Mexico City, Mexico.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TRIOSEPHOSPHATE ISOMERASE
A
257Giardia intestinalisMutation(s): 1 
EC: 5.3.1.1
Find proteins for P36186 (Giardia intestinalis)
Go to UniProtKB:  P36186
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
PGA
Query on PGA

Download SDF File 
Download CCD File 
A
2-PHOSPHOGLYCOLIC ACID
C2 H5 O6 P
ASCFNMCAHFUBCO-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
PGAKd: 26400 nM BINDINGMOAD
PGAKd: 26400 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.180 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 55.548α = 90.00
b = 102.021β = 90.00
c = 118.769γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
SCALEPACKdata scaling
REFMACrefinement
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-05-29
    Type: Initial release
  • Version 1.1: 2013-08-14
    Type: Database references