title: Guanine, pyrazolo[3,4-d]pyrimidine, and triazolo[4,5-d]pyrimidine (8-azaguanine) phosphonate acyclic derivatives as inhibitors of purine nucleoside phosphorylase.
abstract: Phosphonate acyclic derivates of guanines, pyrazolo[3,4-d]pyrimidines, and triazolo[4,5-d]-pyrimidines (8-azaguanines) are inhibitors of the enzyme purine nucleoside phosphorylase (PNPase) with Ki' values ranging from 0.05 to 1.6 microM. These compounds are enzymatically stable congeners of the potent PNPase inhibitor acyclovir diphosphate (53).
authors.affiliation: Burroughs Wellcome Co., Research Triangle Park, North Carolina 27709, USA.
authors.forename: L M
authors.initials: LM
authors.lastname: Beauchamp
authors.forename: J V
authors.initials: JV
authors.lastname: Tuttle
authors.forename: M E
authors.initials: ME
authors.lastname: Rodriguez
authors.forename: M L
authors.initials: ML
authors.lastname: Sznaidman
mesh_terms: D001375:Azaguanine / Q000031:analogs & derivatives* / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D004791:Enzyme Inhibitors / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D004912:Erythrocytes / Q000201:enzymology; D006147:Guanine / Q000031:analogs & derivatives* / Q000138:chemical synthesis* / Q000494:pharmacology; D006801:Humans; D007700:Kinetics; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D063065:Organophosphonates / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D011621:Pteridines / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D011683:Purine-Nucleoside Phosphorylase / Q000037:antagonists & inhibitors* / Q000097:blood / Q000302:isolation & purification; D013329:Structure-Activity Relationship
chemical_list: D004791:Enzyme Inhibitors; D063065:Organophosphonates; D011621:Pteridines; D006147:Guanine; D011683:Purine-Nucleoside Phosphorylase; D001375:Azaguanine