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: 1.60 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.181 

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Ligand Structure Quality Assessment 


This is version 1.2 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: https://doi.org/10.1371/journal.pone.0069031
  • Primary Citation of Related Structures:  
    4BI5, 4BI6, 4BI7

  • 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, 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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
TRIOSEPHOSPHATE ISOMERASE257Giardia intestinalisMutation(s): 1 
EC: 5.3.1.1
UniProt
Find proteins for P36186 (Giardia intestinalis)
Explore P36186 
Go to UniProtKB:  P36186
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP36186
Sequence Annotations
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  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
PGA PDBBind:  4BI7 Kd: 2.64e+4 (nM) from 1 assay(s)
Binding MOAD:  4BI7 Kd: 2.64e+4 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.181 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.548α = 90
b = 102.021β = 90
c = 118.769γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALEPACKdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-05-29
    Type: Initial release
  • Version 1.1: 2013-08-14
    Changes: Database references
  • Version 1.2: 2023-12-20
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description