Biological Assembly 1  

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Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

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

Macromolecule Content

• Total Structure Weight: 28103.17 
• Atom Count: 2014 
• Residue Count: 257 
• Unique protein chains: 1

4BI6

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

• DOI: 10.2210/pdb4BI6/pdb
• Entry 4BI6 supersedes 2YC6

• Classification: ISOMERASE
• Organism(s): Giardia intestinalis
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): 3 


• Deposited: 2013-04-09 Released: 2013-05-29 
• Deposition Author(s): Torres-Larios, A., Enriquez-Flores, S., Reyes-Vivas, H., Oria-Hernandez, J., Hernandez-Alcantara, G.

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Experimental Data Snapshot

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

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

• PubMed: 23894402 
• DOI: 10.1371/journal.pone.0069031
• Primary Citation of Related Structures:  
  4BI7, 4BI5


• 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.

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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
Molecule	Chains	Sequence Length	Organism	Details
TRIOSEPHOSPHATE ISOMERASE	A	257	Giardia intestinalis	Mutation(s): 3  EC: 5.3.1.1
Find proteins for P36186 (Giardia intestinalis) Go to UniProtKB:  P36186

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
PGA	A	2-PHOSPHOGLYCOLIC ACID C2 H5 O6 P ASCFNMCAHFUBCO-UHFFFAOYSA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
PGA	Kd: 113300 nM BINDINGMOAD
PGA	Kd: 113300 nM PDBBIND

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.45 Å
• R-Value Free: 0.207 
• R-Value Work: 0.190 
• Space Group: I 2 2 2

Unit Cell:

Length (Å)	Angle (°)
a = 55.578	α = 90.00
b = 100.474	β = 90.00
c = 118.147	γ = 90.00

Software Package:

Software Name	Purpose
REFMAC	refinement
PHASER	phasing
SCALEPACK	data scaling
MOSFLM	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2013-04-09 
• Released Date: 2013-05-29 
• Deposition Author(s): Torres-Larios, A., Enriquez-Flores, S., Reyes-Vivas, H., Oria-Hernandez, J., Hernandez-Alcantara, G.
• This entry supersedes: 2YC6

Revision History 

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