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Sinko, William ; Wang, Yang ; Zhu, Wei ; Zhang, Yonghui ; Feixas, Ferran ; Cox, Courtney L. ; Mitchell, Douglas A. ; Oldfield, Eric ; McCammon, J. Andrew ( , Journal of Medicinal Chemistry)
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Venkatramani, Aishwarya ; Gravina Ricci, Clarisse ; Oldfield, Eric ; McCammon, J. Andrew ( , Chemical Biology & Drug Design)
Malaria, mainly caused by
Plasmodium falciparum andPlasmodium vivax, has been a growing cause of morbidity and mortality.P. falciparum is more lethal than isP. vivax , but there is a vital need for effective drugs against both species. Geranylgeranyl diphosphate synthase (GGPPS ) is an enzyme involved in the biosynthesis of quinones and in protein prenylation and has been proposed to be a malaria drug target. However, the structure ofP. falciparum GGPPS (Pf GGPPS ) has not been determined, due to difficulties in crystallization. Here, we created aPf GGPPS model using the homologousP.vivax GGPPS X‐ray structure as a template. We simulated the modeledPf GGPPS as well asPv GGPPS using conventional and Gaussian accelerated molecular dynamics in bothapo‐ andGGPP ‐bound states. TheMD simulations revealed a striking similarity in the dynamics of both enzymes with loop 9‐10 controlling access to the active site. We also found thatGGPP stabilizesPf GGPPS andPv GGPPS into closed conformations andvia similar mechanisms. Shape‐based analysis of the binding sites throughout the simulations suggests that the two enzymes will be readily targeted by the same inhibitors. Finally, we produced threeMD ‐validated conformations ofPf GGPPS to be used in future virtual screenings for potential new antimalarial drugs acting on bothPv GGPPS andPf GGPPS . -
O'Dowd, Bing ; Williams, Sarah ; Wang, Hongxin ; No, Joo Hwan ; Rao, Guodong ; Wang, Weixue ; McCammon, J. Andrew ; Cramer, Stephen P. ; Oldfield, Eric ( , ChemBioChem)