SOLUBILIZATION AND RECONSTITUTION OF VESICULAR STOMATITIS-VIRUS ENVELOPE USING OCTYLGLUCOSIDE

Reconstituted vesicular stomatitis virus envelopes or virosomes are fo rmed by detergent removal from solubilized intact virus. We have monit ored the solubilization process of the intact vesicular stomatitis vir us by the nonionic surfactant octylglucoside at various initial virus concentrations by employing turbidity measurements, This allowed us to determine the phase boundaries between the membrane and the mixed mic elles domains, We have also characterized the lipid and protein conten t of the solubilized material and of the reconstituted envelope. Both G and M proteins and all of the lipids of the envelope were extracted by octylglucoside and recovered in the reconstituted envelope. Fusion activity of the virosomes tested either on Vero cells or on liposomes showed kinetics and pH dependence similar to those of the intact virus .