title: Novel multisubstrate inhibitors of mammalian purine nucleoside phosphorylase.
abstract: In an effort to develop potent multisubstrate-analog inhibitors of purine nucleoside phosphorylase (PNP), three nucleoside phosphonates were designed utilizing structural information from the previously reported structures of complexes of bovine PNP with substrates and products. The nucleoside phosphonates contain an acetal linkage at the O2' and O3' positions and a two-C-atom spacer between the ribose and phosphate moieties. The linkage enables the compounds to simultaneously occupy the purine-, ribose- and phosphate-binding sites. The chemical syntheses, inhibition profiles and structural characterization of these novel multisubstrate analog inhibitors with bovine PNP are described.
authors.affiliation: Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA.
authors.forename: Angela V
authors.initials: AV
authors.lastname: Toms
authors.forename: Weiru
authors.initials: W
authors.lastname: Wang
authors.forename: Yingbo
authors.initials: Y
authors.lastname: Li
authors.forename: Bruce
authors.initials: B
authors.lastname: Ganem
authors.forename: Steven E
authors.initials: SE
authors.lastname: Ealick
mesh_terms: D000818:Animals; D001665:Binding Sites; D002417:Cattle; D018360:Crystallography, X-Ray; D004791:Enzyme Inhibitors / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D020128:Inhibitory Concentration 50; D007288:Inosine / Q000378:metabolism; D008958:Models, Molecular; D009705:Nucleosides / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D063065:Organophosphonates / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D011683:Purine-Nucleoside Phosphorylase / Q000037:antagonists & inhibitors* / Q000737:chemistry / Q000378:metabolism; D013329:Structure-Activity Relationship
chemical_list: D004791:Enzyme Inhibitors; D009705:Nucleosides; D063065:Organophosphonates; D007288:Inosine; D011683:Purine-Nucleoside Phosphorylase