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Methodology for the Efficient Generation of Fluorescently Tagged Vaccinia Virus Proteins
09:27

Methodology for the Efficient Generation of Fluorescently Tagged Vaccinia Virus Proteins

Published on: January 17, 2014

The envelope of vaccinia virus reveals an unusual phospholipid in Golgi complex membranes

E B Cluett1, C E Machamer

  • 1Department of Cell Biology and Anatomy, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.

Journal of Cell Science
|August 1, 1996
PubMed

Insights

Vaccinia virus envelopes reflect Golgi membrane lipid composition. Semilysobisphosphatidic acid, an unusual lipid, is a normal component of the Golgi apparatus, not induced by viral infection.

Area of Science:

  • Cell Biology
  • Virology
  • Biochemistry

Background:

  • Vaccinia virus acquires its envelope from host cell membranes during replication.
  • The Golgi apparatus is a key organelle involved in protein modification and lipid transport.
  • Understanding viral envelope composition can provide insights into host-pathogen interactions.

Purpose of the Study:

  • To analyze the lipid composition of vaccinia virus envelopes.
  • To determine if viral envelopes reflect the lipid profiles of the cis-Golgi network and trans-Golgi network.
  • To identify and characterize unusual lipids within vaccinia virus envelopes.

Main Methods:

  • Isolation of enveloped vaccinia virus from infected HeLa cells.
  • Analysis of viral and cellular lipids using high-performance thin-layer chromatography and digital densitometry.
  • Subcellular fractionation of HeLa cells and Golgi complexes from rat liver.

Main Results:

  • Viral envelopes exhibited distinct lipid profiles, with slight enrichments of phosphatidyl-inositol in cis-Golgi and phosphatidylserine and sphingomyelin in trans-Golgi.
  • Cholesterol levels showed minor differences between cis- and trans-Golgi.
  • Semilysobisphosphatidic acid was found in significant amounts in vaccinia envelopes and Golgi membranes, independent of viral infection.

Conclusions:

  • Vaccinia virus envelopes partially reflect the lipid composition of the Golgi apparatus.
  • Semilysobisphosphatidic acid is a normal lipid component of Golgi membranes.
  • The presence of semilysobisphosphatidic acid in viral envelopes is likely due to its abundance in the Golgi.

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