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Different palmitoylation of paramyxovirus glycoproteins

M Veit1, M F Schmidt, R Rott

  • 1Institut für Virologie, Justus-Liebig-Universität Giessen, Federal Republic of Germany.

Virology
|January 1, 1989
PubMed

Insights

Fatty acids are attached to structural proteins of some paramyxoviruses, like Newcastle disease virus and Simian virus 5, but not Sendai virus. This fatty acylation is reversible and involves specific viral glycoproteins.

Area of Science:

  • Virology
  • Molecular Biology
  • Biochemistry

Background:

  • Paramyxoviruses are a significant family of viruses with diverse structural proteins.
  • The role of post-translational modifications, such as fatty acylation, in viral protein function is an area of ongoing research.
  • Understanding viral protein structure is crucial for developing antiviral strategies.

Purpose of the Study:

  • To investigate the presence and nature of fatty acid covalent attachment in structural proteins of various paramyxoviruses.
  • To identify which specific viral glycoproteins are involved in fatty acylation.
  • To characterize the stability and release of these fatty acid linkages.

Main Methods:

  • Analysis of different paramyxoviruses for fatty acid modification of structural proteins.
  • Utilized Sodium Dodecyl Sulfate-Polyacrylamide Gel Electrophoresis (SDS-PAGE) under reducing conditions (in the presence of mercaptoethanol).
  • Tested the lability of fatty acid linkages using hydroxylamine treatment.

Main Results:

  • The fusion protein (F) of Newcastle disease virus and the hemagglutinin-neuraminidase (HN) glycoprotein of Simian virus 5 were found to be fatty acylated.
  • In contrast, the glycoproteins of Sendai virus were identified as being free of fatty acid attachments.
  • The study demonstrated that the fatty acid linkage is sensitive to hydroxylamine, indicating its ester or amide nature, and that some acyl chains could be released by SDS-PAGE under reducing conditions.

Conclusions:

  • Fatty acylation is not a universal modification across all paramyxoviruses, with significant variation observed at the protein level.
  • Specific glycoproteins, such as the F and HN proteins of certain paramyxoviruses, are targets for fatty acid attachment.
  • The covalent attachment of fatty acids to these viral proteins is a labile modification that can be chemically cleaved.

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