Abstract
The kinetics of inhibition of purified influenza neuraminidases from A/Tokyo/3/67 and B/Memphis/3/89 influenza viruses by (3R,4R,5S)-4-acetamido-5-amino-3-(1-ethylpropoxy)-1-cyclohexene-1-carboxylic acid (GS4071) were investigated. Progress curve experiments established that GS4071 is a time dependent inhibitor of both A and B strains of influenza neuraminidase. The apparent association and dissociation rate constants, as well as the overall Kivalues, were only modestly different for the two neuraminidase strains. The time dependent inhibition phenomenon, often referred to as slow-binding inhibition, appears to be a consequence of the very slow rate of dissociation of the compound from influenza neuraminidase.
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