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- W2562377499 abstract "Ancylostoma caninum anticoagulant peptide 5 (AcAP5) is a potent inhibitor for coagulation factor Xa (FXa). Previous studies show that AcAP5 binds to FXa at the active site, and/or the exosite. The active site-binding contributes to direct blocking of FXa catalytic activity, but the effect of exosite-binding and the underlying mechanism remain unknown. To investigate whether and how the exosite-binding affects FXa function, we prepared several AcAP5 mutants with modifications to the active site-binding or exosite-binding region. Their FXa-inhibiting and anticoagulant activities were examined both in vitro and in rabbit plasma, and the interactions with FXa were analyzed using in silico molecular modeling, docking, and molecular dynamics simulation. Mutants abolishing either active site- or exosite-binding resulted in a dramatic decrease in their anti-FXa and anticoagulant activities. Elongation of AcAP5 exosite-binding region also impaired the FXa-inhibiting activity. Computational analysis demonstrated that the conformation of FXa becomes more rigid due to exosite-binding with AcAP5, which consequently affects its catalytic activity. Our results suggest that both active site- and exosite-binding contribute to the FXa inhibitory activity of AcAP5." @default.
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- W2562377499 date "2017-01-01" @default.
- W2562377499 modified "2023-10-17" @default.
- W2562377499 title "Identification of AcAP5 as a novel factor Xa inhibitor with both direct and allosteric inhibition" @default.
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- W2562377499 doi "https://doi.org/10.1016/j.bbrc.2016.12.116" @default.
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