Novel non-active site inhibitor of Cryptosporidium hominis TS-DHFR identified by a virtual screen.

Autor: Martucci WE; Department of Molecular Biophysics and Biochemistry, Yale University School of Medicine, 333 Cedar Street, New Haven, CT 06520, USA., Udier-Blagovic M, Atreya C, Babatunde O, Vargo MA, Jorgensen WL, Anderson KS
Jazyk: angličtina
Zdroj: Bioorganic & medicinal chemistry letters [Bioorg Med Chem Lett] 2009 Jan 15; Vol. 19 (2), pp. 418-23. Date of Electronic Publication: 2008 Nov 20.
DOI: 10.1016/j.bmcl.2008.11.054
Abstrakt: The essential enzyme thymidylate synthase-dihydrofolate reductase (TS-DHFR) is a validated drug target for many pathogens, but has been elusive in Cryptosporidium hominis, as active site inhibitors of the enzymes from related parasitic protozoa show decreased potency and lack of species specificity over the human enzymes. As a rational approach to discover novel inhibitors, we conducted a virtual screen of a non-active site pocket in the DHFR linker region. From this screen, we have identified and characterized a noncompetitive inhibitor, flavin mononucleotide (FMN), with micromolar potency that is selective for ChTS-DHFR versus the human enzymes. These results describe a novel allosteric pocket amenable to inhibitor targeting, and a lead compound with which to move towards potent, selective inhibitors of ChTS-DHFR.
Databáze: MEDLINE