This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Reprints and Permissions Copyright Information Books from ASM Press MicrobeWorld Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Moore, N F Articles by Wagner, R R Search for Related Content PubMed PubMed Citation Articles by Moore, N F Articles by Wagner, R R

 Previous Article  |  Next Article 

J Virol. 1976 July; 19(1): 126-135

Microviscosity of togavirus membranes studied by fluorescence depolarization: influence of envelope proteins and the host cell.

ABSTRACT

The microviscosities of the hydrophobic regions of the membranes of intact Semliki forest and Sindbis viruses grown on BHK-21 cells, of liposomes derived from the extracted viral lipids, and of protease-treated virions were measured by fluorescence depolorization using the fluorescence probe 1, 6-diphenyl-1,3,5-hexatriene. The intact virus membranes were found to have a higher microviscosity than did virus-derived liposomes, indicating the viral envelope proteins contribute to microviscosity. However, protease-treated virus, devoid of protruding spikes but with residual lipophilic peptide tails, was found to have a microviscosity more similar to that of the intact virus than to that of protein-free liposomes. Sindbis virus grown in BHK-21 cells at 37 C had a much higher microviscosity than did Sindbis virus grown on Aedes albopicuts cells at 22 C. Sindbis virus grwon in A. albopictus and BHK-21 cells also gave higher microviscosity values than did the intact host cells. These data indicate that both the virion proteins and the cellular lipids selected during viral growth and maturation contribute to the increased microviscosity of togavirus membranes.

This article has been cited by other articles:

• Lakowicz, JR, Prendergast, F. (1978). Quantitation of hindered rotations of diphenylhexatriene in lipid bilayers by differential polarized phase fluorometry. Science 200: 1399-1401 [Abstract]