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Type: Artigo de periódico
Title: Purification and characterization of a hemorrhagic metalloproteinase from Bothrops lanceolatus (Fer-de-lance) snake venom
Author: Stroka, A
Donato, JL
Bon, C
Hyslop, S
de Araujo, AL
Abstract: Bothrops snake venoms contain metalloproteinases that contribute to the local effects seen after envenoming. In this work, a hemorrhagic metalloprotemase (BlaH 1) was purified from the venom of the snake Bothrops lanceolatus by a combination of gel filtration, affinity (metal chelating) and hydrophobic interaction chromatographies. The hemorrhagin was homogeneous by SDS-PAGE and had a molecular mass of 28 kDa that was unaltered by treatment with beta-mercaptoethanol. BlaH1 gave a single band in immunoelectrophoresis and immunoblotting using commercial bothropic antivenom. BlaH1 had hemorrhagic, caseinolytic, fibrinogenolytic, collagenolytic and elastinolytic activities, but no phospholipase A(2) activity. The hemorrhagic and caseinolytic activities were inhibited by EDTA, indicating that they were metal ion-dependent. In contrast, aprotinin, benzamidine and PMSF did not affect these activities. The caseinolytic activity of BlaH 1 had a pH optimum of 8.0 and was stable in solution at up to 40 degrees C; activity was completely lost at >= 70 degrees C. The hemorrhagic activity was neutralized by commercial bothropic antivenom. These properties suggest that this new hemorrhagin belongs to class P-I snake venom metallproteinases. (c) 2004 Elsevier Ltd. All rights reserved.
Subject: Bothrops lanceolatus
snake venom
Country: Inglaterra
Editor: Pergamon-elsevier Science Ltd
Citation: Toxicon. Pergamon-elsevier Science Ltd, v. 45, n. 4, n. 411, n. 420, 2005.
Rights: fechado
Identifier DOI: 10.1016/j.toxicon.2004.11.010
Date Issue: 2005
Appears in Collections:Unicamp - Artigos e Outros Documentos

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