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    Proteins. 2006 Mar 15;62(3):570-7.

    Crystal structure of glyceraldehyde-3-phosphate dehydrogenase from Plasmodium falciparum at 2.25 A resolution reveals intriguing extra electron density in the active site.

    Robien MA, Bosch J, Buckner FS, Van Voorhis WC, Worthey EA, Myler P, Mehlin C, Boni EE, Kalyuzhniy O, Anderson L, Lauricella A, Gulde S, Luft JR, DeTitta G, Caruthers JM, Hodgson KO, Soltis M, Zucker F, Verlinde CL, Merritt EA, Schoenfeld LW, Hol WG.

    Source

    Structural Genomics of Pathogenic Protozoa (SGPP), Department of Biochemistry, University of Washington, Seattle 98195, USA.

    Abstract

    The crystal structure of D-glyceraldehyde-3-phosphate dehydrogenase (PfGAPDH) from the major malaria parasite Plasmodium falciparum is solved at 2.25 A resolution. The structure of PfGAPDH is of interest due to the dependence of the malaria parasite in infected human erythrocytes on the glycolytic pathway for its energy generation. Recent evidence suggests that PfGAPDH may also be required for other critical activities such as apical complex formation. The cofactor NAD(+) is bound to all four subunits of the tetrameric enzyme displaying excellent electron densities. In addition, in all four subunits a completely unexpected large island of extra electron density in the active site is observed, approaching closely the nicotinamide ribose of the NAD(+). This density is most likely the protease inhibitor AEBSF, found in maps from two different crystals. This putative AEBSF molecule is positioned in a crucial location and hence our structure, with expected and unexpected ligands bound, can be of assistance in lead development and design of novel antimalarials.

    (c) 2005 Wiley-Liss, Inc.

    PMID:
    16345073
    [PubMed - indexed for MEDLINE]

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