Molecule of the Month: Lactate Dehydrogenase
Our cells temporarily build lactate when supplies of oxygen are low
Mix and Match
Exploring the Structure
Lactate Dehydrogenase with Chloroquine (PDB entry 1cet)
The protozoan parasites that cause malaria are thought to rely on glycolysis for most of their energy during part of their cycle of infection. Researchers are now looking for drugs to block the action of lactate dehydrogenase as a way of attacking these parasites and curing the infection. The structure shown here (PDB entry 1cet ) has four molecules of chloroquine bound in the active sites of the lactate dehydrogenase found in the Plasmodium parasite. Chloroquine is one of the major drugs used to treat malaria, however, its major site of action probably isn't at this enzyme; instead, it is thought to block the unusual methods that the parasite must use to feed on blood. But researchers are exploring many other anti-malarial molecules that target lactate dehydrogenase, as seen in other PDB entries such as 1t24 , 1t25 , and similar structures. To explore this structure in more detail, click on the image for an interactive JSmol.
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- D. L. Nelson and M. M. Cox (2000) Lehninger Principles of Biochemistry. Worth Publishers.
- M. T. Madigan, J. M. Martinko and J. Parker (2000) Brock Biology of Microorganisms. Prentice Hall.
- J. A. Read, K. W. Wilkinson, R. Tranter, R. B. Sessions and R. L. Brady (1999) Chloroquine binds in the cofactor binding site of Plasmodium falciparum lactate dehydrogenase. Journal of Biological Chemistry 274, 10213-10218.
- S. Iwata, K. Kamata, S. Yoshida, T. Minowa and T. Ohta (1994) T and R states in the crystals of bacterial L-lactate dehydrogenase reveal the mechanism for allosteric control. Structure 1, 176-185.
- J. J. Holbrook, A. Liljas, S. J. Steindel and M. G. Rossman (1975) Lactate Dehydrogenase. In "The Enzymes," P. D. Boyer, editor. Academic Press. Volume XI, pages 191-292.
June 2008, David Goodselldoi:10.2210/rcsb_pdb/mom_2008_6