title: Hemorrhagic toxin from the venom of Agkistrodon bilineatus (common cantil).
abstract: 1. Hemorrhagic toxin was isolated from Agkistrodon bilineatus (Common cantil) venom using a three-step purification procedure to obtain 32.8 mg of purified hemorrhagic toxin from 700 mg of crude venom. 2. The purified toxin was homogeneous by disc polyacrylamide gel electrophoresis at pH 8.3, and by isoelectric focusing. 3. Hemorrhagic toxin possessed lethal, hemorrhagic and proteolytic activities. These activities of this toxin were inhibited by ethylenediaminetetraacetic acid (EDTA) and ethyleneglycol-bis-(beta-aminoethylether)N,N'-tetraacetic acid (EGTA), but not by cysteine or soybean trypsin inhibitor (SBTI). 4. Its molecular weight was approximately 48 kDa and the isoelectric point was 4.2. 5. Purified preparation hydrolyzed the Asn(3)--Gln(4), His(10)--Leu(11), Ala(14)--Leu(15), Tyr(16)--Leu(17), Arg(22)--Gly(23) and Phe(24)--Phe(25) bonds of oxidized insulin B. chain. 6. The A alpha chain of fibrinogen was first split and B beta chain was cleaved later by this toxin. 7. Hemorrhagic toxin contains 1 mol of zinc and 2 mol of calcium per mol of protein.
authors.affiliation: Department of Microbiology, Faculty of Pharmacy, Meijo University, Nagoya, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Imai
authors.forename: T
authors.initials: T
authors.lastname: Nikai
authors.forename: H
authors.initials: H
authors.lastname: Sugihara
authors.forename: C L
authors.initials: CL
authors.lastname: Ownby
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D003435:Crotalid Venoms / Q000032:analysis* / Q000378:metabolism; D004591:Electrophoresis, Polyacrylamide Gel; D005340:Fibrinogen / Q000378:metabolism; D006470:Hemorrhage / Q000209:etiology*; D006868:Hydrolysis; D007328:Insulin / Q000378:metabolism; D007928:Lethal Dose 50; D051379:Mice; D008969:Molecular Sequence Data; D008970:Molecular Weight; D010084:Oxidation-Reduction; D010447:Peptide Hydrolases; D013917:Thrombin / Q000378:metabolism; D014118:Toxins, Biological / Q000302:isolation & purification* / Q000378:metabolism
chemical_list: D003435:Crotalid Venoms; D007328:Insulin; D014118:Toxins, Biological; D005340:Fibrinogen; D010447:Peptide Hydrolases; D013917:Thrombin