2PTZ

Crystal Structure of the T. brucei enolase complexed with phosphonoacetohydroxamate (PAH), His156-out conformation

Summary for 2PTZ

• Entry DOI: 10.2210/pdb2ptz/pdb
• Related: 1oep 2ptw 2ptx 2pty
• Descriptor: Enolase, ZINC ION, PHOSPHONOACETOHYDROXAMIC ACID, ... (5 entities in total)
• Functional Keywords: lyase, glycolysis, his-tag
• Biological source: Trypanosoma brucei
• Total number of polymer chains: 1
• Total formula weight: 47317.78

Authors

Navarro, M.V.A.S.,Rigden, D.J.,Garratt, R.C.,Dias, S.M.G. (deposition date: 2007-05-08, release date: 2007-11-20, Last modification date: 2023-08-30)

Primary citation

Navarro, M.V.,Gomes Dias, S.M.,Mello, L.V.,da Silva Giotto, M.T.,Gavalda, S.,Blonski, C.,Garratt, R.C.,Rigden, D.J.
Structural flexibility in Trypanosoma brucei enolase revealed by X-ray crystallography and molecular dynamics.
Febs J., 274:5077-5089, 2007

PubMed Abstract: Enolase is a validated drug target in Trypanosoma brucei. To better characterize its properties and guide drug design efforts, we have determined six new crystal structures of the enzyme, in various ligation states and conformations, and have carried out complementary molecular dynamics simulations. The results show a striking structural diversity of loops near the catalytic site, for which variation can be interpreted as distinct modes of conformational variability that are explored during the molecular dynamics simulations. Our results show that sulfate may, unexpectedly, induce full closure of catalytic site loops whereas, conversely, binding of inhibitor phosphonoacetohydroxamate may leave open a tunnel from the catalytic site to protein surface offering possibilities for drug development. We also present the first complex of enolase with a novel inhibitor 2-fluoro-2-phosphonoacetohydroxamate. The molecular dynamics results further encourage efforts to design irreversible species-specific inhibitors: they reveal that a parasite enzyme-specific lysine may approach the catalytic site more closely than crystal structures suggest and also cast light on the issue of accessibility of parasite enzyme-specific cysteines to chemically modifying reagents. One of the new sulfate structures contains a novel metal-binding site IV within the catalytic site cleft.

PubMed: 17822439
DOI: 10.1111/j.1742-4658.2007.06027.x

Experimental method

X-RAY DIFFRACTION (1.65 Å)