Download MendeleyPyruvate kinase from Plasmodium falciparum: Structural and kinetic insights into the allosteric mechanism.
Zhong, W., Li, K., Cai, Q., Guo, J., Yuan, M., Wong, Y.H., Walkinshaw, M.D., Fothergill-Gilmore, L.A., Michels, P.A.M., Dedon, P.C., Lescar, J.(2020) Biochem Biophys Res Commun 532: 370-376
- PubMed: 32878705
- DOI: https://doi.org/10.1016/j.bbrc.2020.08.048
- Primary Citation of Related Structures:
6KSH - PubMed Abstract:
During its intra-erythrocytic growth phase, the malaria parasite Plasmodium falciparum relies heavily on glycolysis for its energy requirements. Pyruvate kinase (PYK) is essential for regulating glycolytic flux and for ATP production, yet the allosteric mechanism of P. falciparum PYK (PfPYK) remains poorly understood. Here we report the first crystal structure of PfPYK in complex with substrate analogues oxalate and the ATP product. Comparisons of PfPYK structures in the active R-state and inactive T-state reveal a 'rock-and-lock' allosteric mechanism regulated by rigid-body rotations of each subunit in the tetramer. Kinetic data and structural analysis indicate glucose 6-phosphate is an activator by increasing the apparent maximal velocity of the enzyme. Intriguingly, the trypanosome drug suramin inhibits PfPYK, which points to glycolysis as a set of potential therapeutic targets against malaria.
Organizational Affiliation:
Antimicrobial Resistance Interdisciplinary Research Group, Singapore-MIT Alliance for Research and Technology, 1 CREATE Way, 138602, Singapore; NTU Institute of Structural Biology, Nanyang Technological University, 636921, Singapore.
