title: Kinin-releasing enzyme from the venom of Bitis arietans (puff adder).
abstract: A kinin-releasing enzyme was isolated from Bitis arietans (puff adder) venom by Sephadex G-100 and DEAE-cellulose column chromatographies. The kinin-releasing enzyme was shown to be homogeneous as demonstrated by a single band on acrylamide gel electrophoresis, isoelectric focusing, sodium dodecyl sulfate-polyacrylamide gel electrophoresis and immunodiffusion. Its molecular mass is approximately 45 kDa with an isoelectric point of 6.5. Kinin-releasing enzyme possesses proteolytic activity which hydrolyzes the Leu6-Cys7, His10-Leu11 and Ala14-Leu15 bonds of the B chain of oxidized insulin and the A alpha and B beta chain of fibrinogen. Kinin-releasing and benzoyl-L-arginine ethyl ester hydrolytic activities of this enzyme were inhibited by diisopropyl fluorophosphate, suggesting that the serine hydroxyl group is involved in enzymatic activities.
mesh_terms: D000595:Amino Acid Sequence; D000596:Amino Acids / Q000032:analysis; D000818:Animals; D004795:Enzyme Stability; D007700:Kinetics; D008970:Molecular Weight; D010447:Peptide Hydrolases / Q000302:isolation & purification* / Q000378:metabolism; D014757:Viper Venoms / Q000302:isolation & purification* / Q000378:metabolism
chemical_list: D000596:Amino Acids; D014757:Viper Venoms; D010447:Peptide Hydrolases; C028428:Shimeji kininase