1IF2 image
Entry Detail
PDB ID:
1IF2
Keywords:
Title:
X-RAY STRUCTURE OF LEISHMANIA MEXICANA TRIOSEPHOSPHATE ISOMERASE COMPLEXED WITH IPP
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2001-04-12
Release Date:
2001-08-17
Method Details:
Experimental Method:
Resolution:
2.00 Å
R-Value Free:
0.18
R-Value Work:
0.16
R-Value Observed:
0.13
Space Group:
C 1 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:TRIOSEPHOSPHATE ISOMERASE
Mutations:E65Q
Chain IDs:A
Chain Length:251
Number of Molecules:1
Biological Source:Leishmania mexicana
Ligand Molecules
Primary Citation
Structural determinants for ligand binding and catalysis of triosephosphate isomerase.
Eur.J.Biochem. 268 5189 5196 (2001)
PMID: 11589711 DOI: 10.1046/j.0014-2956.2001.02452.x

Abstact

The crystal structure of leishmania triosephosphate isomerase (TIM) complexed with 2-(N-formyl-N-hydroxy)-aminoethyl phosphonate (IPP) highlights the importance of Asn11 for binding and catalysis. IPP is an analogue of the substrate D-glyceraldehyde-3-phosphate, and it is observed to bind with its aldehyde oxygen in an oxyanion hole formed by ND2 of Asn11 and NE2 of His95. Comparison of the mode of binding of IPP and the transition state analogue phosphoglycolohydroxamate (PGH) suggests that the Glu167 side chain, as well as the triose part of the substrate, adopt different conformations as the catalysed reaction proceeds. Comparison of the TIM-IPP and the TIM-PGH structures with other liganded and unliganded structures also highlights the conformational flexibility of the ligand and the active site, as well as the conserved mode of ligand binding.

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Primary Citation of related structures