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| SILVA,Germana Michelle de Medeiros e; BEZERRA,Raquel Pedrosa; TEIXEIRA,José António; SILVA,Flávio Oliveira; CORREIA,Juliana Mendes; PORTO,Tatiana Souza; LIMA-FILHO,José Luis; PORTO,Ana Lúcia Figueiredo. |
| ABSTRACT Thrombosis is a pathophysiological disorder caused by accumulation of fibrin in the blood. Fibrinolytic proteases with potent thrombolytic activity have been produced by diverse microbial sources. Considering the microbial biodiversity of the Amazon region, this study aimed at the screening, production and biochemical characterization of a fibrinolytic enzyme produced by Streptomyces sp. isolated from Amazonian lichens. The strain Streptomyces DPUA1576 showed the highest fibrinolytic activity, which was 283 mm2. Three variables at two levels were used to assess their effects on the fibrinolytic production. The parameters studied were agitation (0.28 - 1.12 g), temperature (28 - 36 ºC) and pH (6.0 - 8.0); all of them had significant effects on the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Actinomycetes; Fibrinolytic protease; Inhibitor protease; Fibrinogenolytic activity. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672016000300323 |
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| Costa,J. O.; Petric,C. B.; Hamaguchi,A.; Homsi-Brandeburgo,M. I.; Oliveira,C. Z.; Soares,A. M.; Oliveira,F.. |
| Two fibrinogenolytic enzymes, Bothrops alternatus metalloprotease isoform (BaltMP)-I and II, were purified from Bothrops alternatus venom using Diethylaminoethyl (DEAE) Sephacel, Sephadex G-75 and Heparin-Agarose column chromatography. Purified BaltMP-I and II ran as single protein bands on analytical polyacrylamide gel electrophoresis and showed molecular weights of 29000 and 36000, respectively, under reducing conditions in sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE). BaltMP-II, but not BaltMP-I, displayed blood-clotting activity in bovine plasma, which was about 10-fold higher than that of the crude venom. Both enzymes were proteolytically active against bovine fibrinogen as substrate. When fibrinogen and each enzyme were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Snake venom; Bothrops alternatus; Metalloproteases; Functional characterization; Fibrinogenolytic activity; Defibrinogenation in vivo. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992007000300007 |
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