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Interaction between hepatitis C virus core protein and E1 envelope protein

S Y Lo1, M J Selby, J H Ou

  • 1Department of Molecular Microbiology and Immunology, University of Southern California, Los Angeles 90033, USA.

Journal of Virology
|August 1, 1996
PubMed
Summary

Hepatitis C virus core protein interacts with the E1 envelope protein, crucial for viral assembly. This interaction, occurring in the endoplasmic reticulum, is vital for hepatitis C virus (HCV) morphogenesis.

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Area of Science:

  • Virology
  • Molecular Biology
  • Hepatitis C Virus Research

Background:

  • Hepatitis C virus (HCV) possesses three structural genes: C, E1, and E2.
  • The C gene encodes the core (capsid) protein, while E1 and E2 encode envelope proteins.

Purpose of the Study:

  • To investigate the interaction between HCV core protein and envelope proteins.
  • To elucidate the role of protein interactions in HCV morphogenesis.

Main Methods:

  • Immunoprecipitation assays to detect protein interactions.
  • Analysis of hybrid proteins and deletion mutants.
  • Subcellular localization studies.

Main Results:

  • HCV E1 protein specifically interacts with the core protein.

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  • This interaction is independent of gene linkage and occurs in the endoplasmic reticulum.
  • Carboxy-terminal sequences of both core and E1 proteins are critical for interaction.
  • HCV E2 protein does not appear to interact with the core protein.

    • Conclusions:

    • HCV core and E1 proteins interact, likely within the endoplasmic reticulum membrane.
    • This interaction is a key factor in the assembly of the hepatitis C virus virion.
    • Findings provide insights into HCV morphogenesis and potential therapeutic targets.