[Interaction investigation of trypsin inhibitor from sea anemone Radianthus macrodactylus with proteases].

The interaction of inhibitor VJ (InhVJ), isolated from sea anemone R. macrodactylus, with different proteases was investigated. The following enzymes were tested: serine proteases (trypsin, alpha-chymotrypsin, plasmin, thrombin, kallikrein), cysteine protease (papain) and aspartic protease (pepsin). Inhibitor VJ interacted only with trypsin and 6-chymotrypsin. Kinetic and thermodynamics parameters of intermolecular complexes formation were determined: KD = 7,38 x 10(-8) M and 9,93 x 10(-7) M for pairs InhVJ/trypsin and InhVJ/alpha-chymotrypsin, respectively.