4BI6

CRYSTAL STRUCTURE OF A TRIPLE MUTANT (A198V, C202A AND C222N) OF TRIOSEPHOSPHATE ISOMERASE FROM GIARDIA LAMBLIA. COMPLEXED WITH 2- PHOSPHOGLYCOLIC ACID


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.191 

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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:  
    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 ...

    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)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TRIOSEPHOSPHATE ISOMERASEA257Giardia intestinalisMutation(s): 3 
EC: 5.3.1.1 (PDB Primary Data), 4.2.3.3 (UniProt)
UniProt
Find proteins for P36186 (Giardia intestinalis)
Explore P36186 
Go to UniProtKB:  P36186
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PGA (Subject of Investigation/LOI)
Query on PGA

Download Ideal Coordinates CCD File 
B [auth A]2-PHOSPHOGLYCOLIC ACID
C2 H5 O6 P
ASCFNMCAHFUBCO-UHFFFAOYSA-N
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
PGA PDBBind:  4BI6 Kd: 1.13e+5 (nM) from 1 assay(s)
Binding MOAD:  4BI6 Kd: 1.13e+5 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.191 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.578α = 90
b = 100.474β = 90
c = 118.147γ = 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