A single-step purification of bothropstoxin-1.
Bothrops venoms are complex mixtures of components with a wide range of biological activities. Among these substances, myotoxins have been investigated by several groups. Bothropstoxin-1 (Bthtx-1) is a phospholipase A2-like basic myotoxin from Bothrops jararacussu. The purification of this component involves two chromatographic steps. Although providing a pure material, the association of these two steps is time consuming and a single-step method using high performance chromatography media would be useful. In the present study, we describe a single-step purification method for Bthtx-1. Bothrops jararacussu venom was dissolved in 1 ml buffer. After centrifugation, the supernatant was injected into a Resource-S cation exchange column connected to an FPLC system and eluted with a linear salt gradient. The complete procedure took 20 min, representing a considerable time gain when compared to a previously described method (Homsi-Brandenburgo MI et al. (1988) Toxicon, 26: 615-627). Bthtx-1 purity and identity, assessed by SDS-PAGE and N-terminal sequencing, resulted in a single band with a molecular mass of about 14 kDa and the expected sequence of the first 5 residues, S-L-F-E-L. Although the amount of protein purified after each run is lower than in the previously described method, we believe that this method may be useful for small-scale purifications.
Spencer
P J
PJ
IPEN/CNEN SP, São Paulo, Brasil. pspencer@net.ipen.br
Aird
S D
SD
Boni-Mitake
M
M
Nascimento
N
N
Rogero
J R
JR
D000818:Animals; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D003435:Crotalid Venoms / Q000302:isolation & purification*
D003435:Crotalid Venoms; C078097:bothropstoxin