| Literature DB >> 18778937 |
Andrew S Murkin1, Keith Clinch, Jennifer M Mason, Peter C Tyler, Vern L Schramm.
Abstract
Neighboring-group participation in the reaction catalyzed by purine nucleoside phosphorylase involves a compression mode between the 5'- and 4'-ribosyl oxygens, facilitated by His257. The His257Gly mutant opens a space in the catalytic site. Hydrophobic 5'-substituted Immucillins are transition-state analogue inhibitors of this mutant enzyme. Dissociation constants as low as 2pM are achieved, with K(m)/K(d) as high as 400,000,000.Entities:
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Year: 2008 PMID: 18778937 PMCID: PMC2614083 DOI: 10.1016/j.bmcl.2008.08.047
Source DB: PubMed Journal: Bioorg Med Chem Lett ISSN: 0960-894X Impact factor: 2.823