PMID: 12925782 , Related PDB ids: 1E7W, 1E92, 1P33, R1P33SF

Authors:

Zhao H, Bray T, Ouellette M, Zhao M, Ferre RA, Matthews D, Whiteley JM, Varughese KI

Title:

Structure of pteridine reductase (PTR1) from Leishmania tarentolae.

Journal:

Acta Crystallogr D Biol Crystallogr. 2003 Sep;59(Pt 9):1539-44. Epub 2003, Aug 19.

Abstract:

The protozoan parasites Leishmania utilize a pteridine-reducing enzyme, pteridine reductase (PTR1), to bypass antifolate inhibition. The crystal structure of PTR1 from L. tarentolae has been solved as a binary complex with NADPH at 2.8 A resolution. The structure was solved by molecular-replacement techniques using the recently reported L. major PTR1 structure as a search model. Comparisons of the present structure with the L. major PTR1 allowed us to identify regions of flexibility in the molecule. PTR1 is a member of the growing family of short-chain dehydrogenases (SDR) which share the characteristic Tyr(Xaa)(3)Lys motif in the vicinity of the active site. The functional enzyme is a tetramer and the crystallographic asymmetric unit contains a tetramer with 222 point-group symmetry.