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The foamy virus envelope glycoproteins.

D Lindemann1, P A Goepfert

  • 1Institut für Virologie, Medizinische Fakultät Carl-Gustav-Carus, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany. dirk.lindemann@mailbox.tu-dresden.de

Current Topics in Microbiology and Immunology
|August 12, 2003
PubMed
Summary

Foamy viruses (FVs) utilize unique envelope glycoproteins, gp170(Env-Bet) and gp130Env, for replication. Gp130Env is essential for FV budding and particle release, a function not compensated by other viral glycoproteins.

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Area of Science:

  • Virology
  • Molecular Biology
  • Cell Biology

Background:

  • Retroviral glycoproteins mediate host cell entry and membrane fusion.
  • Foamy viruses (FVs) are retroviruses with a broad host range but an unknown cellular receptor.
  • FV envelope glycoproteins possess unique characteristics compared to other retroviruses.

Purpose of the Study:

  • To review current knowledge on Foamy virus (FV) envelope (Env) proteins.
  • To elucidate the functions of FV Env proteins in the viral replication cycle.
  • To highlight unique features of FV Env proteins.

Main Methods:

  • Literature review of studies on FV Env proteins.
  • Characterization of FV Env protein functions in viral replication.
  • Analysis of FV Env protein domains and their influence on viral processes.

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Main Results:

  • FVs possess two Env types: gp170(Env-Bet) and gp130Env.
  • Gp130Env is strictly required for FV budding and particle release.
  • Gp130Env domains influence intracellular transport and capsid interaction.
  • Gp130Env expression alone induces subviral particle release.

Conclusions:

  • FV Env proteins, particularly gp130Env, have unique roles in viral replication.
  • Gp130Env is critical for FV particle egress and release.
  • Further research into FV Env proteins may reveal novel antiviral targets.