On a Possible Neutral Charge State for the Catalytic Dyad in β-Secretase When Bound to Hydroxyethylene Transition State Analogue Inhibitors
2011
β-Secretase is one of the aspartic proteases involved in the formation of amyloid plaques in Alzheimer’s disease patients. Our previous results using a combination of surface plasmon resonance experiments with molecular modeling calculations suggested that the Asp dyad in β-secretase bound to hydroxylethylene containing inhibitors adopts a neutral charged state. In this work, we show that the Asp dyad diprotonated state reproduced the binding ranking of a set of these inhibitors better than alternative protonation states.
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