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A Protocol for Analyzing Hepatitis C Virus Replication
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Structure of the hepatitis C virus E1E2 glycoprotein complex.

Alba Torrents de la Peña1, Kwinten Sliepen2,3, Lisa Eshun-Wilson1

  • 1Department of Integrative Structural Biology and Computational Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.

Science (New York, N.Y.)
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Hepatitis C virus (HCV) E1E2 glycoproteins' structure was determined using cryo-EM. This reveals how HCV E1E2 binds neutralizing antibodies, aiding vaccine and drug design.

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Area of Science:

  • Virology
  • Structural Biology
  • Immunology

Background:

  • Hepatitis C virus (HCV) causes chronic liver disease, cirrhosis, and liver cancer, affecting over 58 million globally.
  • HCV envelope glycoproteins E1 and E2 are crucial for viral entry and are key targets for neutralizing antibodies.

Purpose of the Study:

  • To elucidate the molecular mechanisms of E1E2 assembly.
  • To understand how the E1E2 heterodimer interacts with broadly neutralizing antibodies.

Main Methods:

  • Cryo-electron microscopy (cryo-EM) was used to determine the structure of the membrane-extracted full-length E1E2 heterodimer.
  • The structure was resolved in complex with three broadly neutralizing antibodies: AR4A, AT1209, and IGH505.

Main Results:

  • The cryo-EM structure of the full-length E1E2 heterodimer in complex with three broadly neutralizing antibodies was determined at ~3.5-angstrom resolution.
  • The interface between the E1 and E2 ectodomains was resolved, providing detailed structural insights.

Conclusions:

  • The determined structure provides a blueprint for the rational design of novel vaccine immunogens against HCV.
  • These findings will guide the development of new antiviral drugs targeting HCV entry.