The serpin antithrombin requires allosteric activation with a sequence-specific pentasaccharide unit

The serpin antithrombin requires allosteric activation with a sequence-specific pentasaccharide unit of heparin or heparan sulfate glycosaminoglycans to function as an anticoagulant regulator of blood clotting proteases. two successive conformational changes. Equilibrium binding studies of pentasaccharide interactions with native and latent antithrombins and the salt dependence of these interactions suggest that each PIK-75 conformational change … [Read more…]