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 2 pM are achieved, with Km/Kd as high as 400,000,000.
Original language | English (US) |
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Pages (from-to) | 5900-5903 |
Number of pages | 4 |
Journal | Bioorganic and Medicinal Chemistry Letters |
Volume | 18 |
Issue number | 22 |
DOIs | |
State | Published - Nov 15 2008 |
Keywords
- Binding
- ImmH
- Immucillin
- Mutant
- PNP
- Transition-state analogue
ASJC Scopus subject areas
- Biochemistry
- Molecular Medicine
- Molecular Biology
- Pharmaceutical Science
- Drug Discovery
- Clinical Biochemistry
- Organic Chemistry