Data/hora: 01/06/2024 04:46:01

Provedor de dados: | 56
País: | Brazil
Título: | Single-step purification of crotapotin and crotactine from Crotalus durissus terrificus venom using preparative isoelectric focusing
Data: | 1997-01-01
Ano: | 1997
Palavras-chave: | Crotalus durissus terrificus; Crotactine; Crotapotin; Phospholipase A2; Isoelectrofocusing; Presynaptic B-neurotoxin.
Resumo: | We describe the isolation of crotoxin, a presynaptic B-neurotoxin, as well as its subunits B (crotactine) and A (crotapotin) from lyophilized Crotalus durissus terrificus venom by a single-step preparative isoelectric focusing procedure. From 98 mg of dried venom protein 20.1 mg of crotactine and 13.1 mg of crotapotin were recovered in the first step of focalization and 4.2 mg in a second run. These values correspond to 35.7% of the total venom protein applied. Crotactine separated in the 9.3-7.0 pH range (tubes 1-6) and crotapotin in the 1.8-2.8 pH range (tubes 15-19) and both were homogeneous by SDS-PAGE and N-terminal amino acid analysis. Crotactine, a 12-kDa protein, presented hemolytic and phospholipase A2 activity. Thus, using isoelectric focusing we simultaneously purified both toxins in high yields. This method can be used as an alternative for the purification and characterization of proteins from other snake venoms under conditions in which biological activity is retained
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997000100004
Editor: | Associação Brasileira de Divulgação Científica
Relação: | 10.1590/S0100-879X1997000100004
Formato: | text/html
Fonte: | Brazilian Journal of Medical and Biological Research  v.30 n.1 1997
Fonte: | info:eu-repo/semantics/openAccess