2XOX

Crystal structure of pteridine reductase (PTR1) from Leishmania donovani

Summary for 2XOX

• Entry DOI: 10.2210/pdb2xox/pdb
• Descriptor: PTERIDINE REDUCTASE, SULFATE ION (3 entities in total)
• Functional Keywords: oxidoreductase, antifolates, short-chain reductase
• Biological source: LEISHMANIA DONOVANI
• Total number of polymer chains: 2
• Total formula weight: 60753.07

Authors

Barrack, K.L.,Tulloch, L.B.,Burke, L.A.,Fyfe, P.K.,Hunter, W.N. (deposition date: 2010-08-24, release date: 2011-01-12, Last modification date: 2023-12-20)

Primary citation

Barrack, K.L.,Tulloch, L.B.,Burke, L.A.,Fyfe, P.K.,Hunter, W.N.
Structure of Recombinant Leishmania Donovani Pteridine Reductase Reveals a Disordered Active Site.
Acta Crystallogr.,Sect.F, 67:33-, 2011

PubMed Abstract: Pteridine reductase (PTR1) is a potential target for drug development against parasitic Trypanosoma and Leishmania species, protozoa that are responsible for a range of serious diseases found in tropical and subtropical parts of the world. As part of a structure-based approach to inhibitor development, specifically targeting Leishmania species, well ordered crystals of L. donovani PTR1 were sought to support the characterization of complexes formed with inhibitors. An efficient system for recombinant protein production was prepared and the enzyme was purified and crystallized in an orthorhombic form with ammonium sulfate as the precipitant. Diffraction data were measured to 2.5 Å resolution and the structure was solved by molecular replacement. However, a sulfate occupies a phosphate-binding site used by NADPH and occludes cofactor binding. The nicotinamide moiety is a critical component of the active site and without it this part of the structure is disordered. The crystal form obtained under these conditions is therefore unsuitable for the characterization of inhibitor complexes.

PubMed: 21206018
DOI: 10.1107/S174430911004724X

Experimental method

X-RAY DIFFRACTION (2.5 Å)