Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Structure of Hepatitis C virus envelope glycoprotein E1 antigenic site 314–324 in complex with antibody IGH526

Journal Article · · Journal of Molecular Biology
 [1];  [1];  [2];  [2];  [1];  [3];  [1];  [4];  [5];  [2]
  1. The Scripps Research Inst., La Jolla, CA (United States). Dept. of Integrative Structural and Computational Biology
  2. The Scripps Research Inst., La Jolla, CA (United States). Dept. of Immunology and Microbial Science
  3. The Scripps Research Inst., La Jolla, CA (United States). Dept. of Chemistry; The Scripps Research Inst., La Jolla, CA (United States). Dept. of Cell and Molecular Biology
  4. The Scripps Research Inst., La Jolla, CA (United States). Dept. of Chemistry; The Scripps Research Inst., La Jolla, CA (United States). Dept. of Cell and Molecular Biology
  5. The Scripps Research Inst., La Jolla, CA (United States). Dept. of Integrative Structural and Computational Biology; The Scripps Research Inst., La Jolla, CA (United States). Skaggs Inst. for Chemical Biology
Hepatitis C virus (HCV) is a positive-strand RNA virus within the Flaviviridae family. The viral “spike” of HCV is formed by two envelope glycoproteins, E1 and E2, which together mediate viral entry by engaging host receptors and undergoing conformational changes to facilitate membrane fusion. While E2 can be readily produced in the absence of E1, E1 cannot be expressed without E2 and few reagents, including monoclonal antibodies, are available for study of this essential HCV glycoprotein. A human MAb to E1, IGH526, was previously reported to cross-neutralize different HCV isolates and, therefore, we sought to further characterize the IGH526 neutralizing epitope to obtain information for vaccine design. Here, we found that MAb IGH526 bound to a discontinuous epitope, but with a major component corresponding to E1 residues 314-324. The crystal structure of IGH526 Fab with this E1 glycopeptide at 1.75Å resolution revealed that the antibody binds to one face of an α-helical peptide. Single mutations on the helix substantially lowered IGH526 binding but did not affect neutralization, indicating either that multiple mutations are required or that additional regions are recognized by the antibody in the context of the membrane-associated envelope oligomer. Finally, molecular dynamics simulations indicate the free peptide is flexible in solution, suggesting that it requires stabilization for use as a candidate vaccine immunogen.
Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
National Institutes of Health (NIH); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1214858
Alternate ID(s):
OSTI ID: 1246619
Journal Information:
Journal of Molecular Biology, Journal Name: Journal of Molecular Biology Journal Issue: 16 Vol. 427; ISSN 0022-2836
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
ENGLISH

References (63)

Accessing the Kabat antibody sequence database by computer: ACCESSING THE KABAT DATABASE BY COMPUTER journal May 1996
A fast SHAKE algorithm to solve distance constraint equations for small molecules in molecular dynamics simulations journal January 2001
Global epidemiology of hepatitis C virus infection: New estimates of age-specific antibody to HCV seroprevalence journal February 2013
Satisfying Hydrogen Bonding Potential in Proteins journal May 1994
High Helical Propensity of the Peptide Fragments Derived from β-Lactoglobulin, a Predominantly β-sheet Protein journal December 1995
Vpr Is Required for Efficient Replication of Human Immunodeficiency Virus Type-1 in Mononuclear Phagocytes journal February 1995
The Transmembrane Domain of the Hepatitis C Virus E2 Glycoprotein Is Required for Correct Folding of the E1 Glycoprotein and Native Complex Formation journal January 2001
Nomenclature and Numbering of the Hepatitis C Virus book January 2009
Structure of myohemerythrin in the azidomet state at resolution journal September 1987
Aromatic rings act as hydrogen bond acceptors journal June 1988
The molecular surface package journal June 1993
Antibody-antigen interactions: new structures and new conformational changes journal January 1994
A Helix Propensity Scale Based on Experimental Studies of Peptides and Proteins journal July 1998
[20] Processing of X-ray diffraction data collected in oscillation mode book January 1997
Structural characterization of the transmembrane proximal region of the hepatitis C virus E1 glycoprotein journal March 2010
Capitalizing on knowledge of hepatitis C virus neutralizing epitopes for rational vaccine design journal April 2015
Broadly Neutralizing Anti-HIV Antibody 4E10 Recognizes a Helical Conformation of a Highly Conserved Fusion-Associated Motif in gp41 journal February 2005
Hepatitis C virus reinfection among prisoners with sustained virological response after treatment for chronic hepatitis C journal July 2013
Safety and immunogenicity of HCV E1E2 vaccine adjuvanted with MF59 administered to healthy adults journal August 2010
Folding and dimerization of hepatitis C virus E1 and E2 glycoproteins in stably transfected CHO cells journal February 2005
Development and Testing of the OPLS All-Atom Force Field on Conformational Energetics and Properties of Organic Liquids journal January 1996
Molecular Dynamics of Poly( l -lysine) Dendrimers with Naphthalene Disulfonate Caps journal March 2009
Helix-enhancing propensity of fluoro and alkyl alcohols: influence of pH, temperature and cosolvent concentration on the helical conformation of peptides: Cosolvent-induced helix formation in protein segments journal March 1999
Prospects for a vaccine against the hepatitis C virus journal August 2005
Unexpected structure for the N-terminal domain of hepatitis C virus envelope glycoprotein E1 journal September 2014
Broadly neutralizing antibodies protect against hepatitis C virus quasispecies challenge journal December 2007
The ins and outs of hepatitis C virus entry and assembly journal September 2013
Specific protein–lipid interactions in membrane proteins journal October 2005
New Hepatitis C Therapies: The Toolbox, Strategies, and Challenges journal May 2014
Reversible multiple time scale molecular dynamics journal August 1992
Particle mesh Ewald: An N ⋅log( N ) method for Ewald sums in large systems journal June 1993
Constant pressure molecular dynamics algorithms journal September 1994
Human broadly neutralizing antibodies to the envelope glycoprotein complex of hepatitis C virus journal April 2012
Structural basis of hepatitis C virus neutralization by broadly neutralizing antibody HCV1 journal May 2012
Electrostatics of nanosystems: Application to microtubules and the ribosome journal August 2001
Three-dimensional structure of an antibody-antigen complex. journal November 1987
At least 12 genotypes of hepatitis C virus predicted by sequence analysis of the putative E1 gene of isolates collected worldwide. journal September 1993
A versatile vector for gene and oligonucleotide transfer into cells in culture and in vivo: polyethylenimine. journal August 1995
Characterization of Antibodies Induced by Vaccination with Hepatitis C Virus Envelope Glycoproteins journal September 2010
Hepatitis C Virus Reinfection Following Treatment Among People Who Use Drugs journal August 2013
Expression and characterization of glycoprotein gp35 of hepatitis C virus using recombinant vaccinia virus journal September 1992
Characterization of truncated forms of hepatitis C virus glycoproteins. journal September 1997
Canonical dynamics: Equilibrium phase-space distributions journal March 1985
An approach to rapid protein crystallization using nanodroplets journal March 2002
Phaser crystallographic software journal July 2007
PHENIX: a comprehensive Python-based system for macromolecular structure solution journal January 2010
Features and development of Coot journal March 2010
The JCSG high-throughput structural biology pipeline journal September 2010
Directly Acting Antivirals (DAAs) for the Treatment of Chronic Hepatitis C Virus Infection in Liver Transplant Patients: “A Flood of Opportunity”: DAAs for HCV-Related Liver Transplant journal April 2014
Human monoclonal antibodies for the immunological characterization of a highly conserved protein domain of the hepatitis C virus glycoprotein E1 journal August 1995
Evolving epidemiology of hepatitis C virus journal February 2011
A human vaccine strategy based on chimpanzee adenoviral and MVA vectors that primes, boosts, and sustains functional HCV-specific T cell memory journal November 2014
Fine Mapping of Murine Antibody Responses to Immunization with a Novel Soluble Form of Hepatitis C Virus Envelope Glycoprotein Complex journal June 2014
Isolation and Characterization of Broadly Neutralizing Human Monoclonal Antibodies to the E1 Glycoprotein of Hepatitis C Virus journal January 2008
Formation and intracellular localization of hepatitis C virus envelope glycoprotein complexes expressed by recombinant vaccinia and Sindbis viruses. journal January 1994
Human immunodeficiency virus type 1 viral protein R (Vpr) arrests cells in the G2 phase of the cell cycle by inhibiting p34cdc2 activity journal November 1995
A Conserved Tryptophan-Rich Motif in the Membrane-Proximal Region of the Human Immunodeficiency Virus Type 1 gp41 Ectodomain Is Important for Env-Mediated Fusion and Virus Infectivity journal March 1999
Human Monoclonal Antibody to Hepatitis C Virus E1 Glycoprotein That Blocks Virus Attachment and Viral Infectivity journal July 2004
Diverse Hepatitis C Virus Glycoproteins Mediate Viral Infection in a CD81-Dependent Manner journal August 2004
Antiviral treatment of hepatitis C journal July 2014
A Meta-Analysis of the Existing Knowledge of Immunoreactivity against Hepatitis C Virus (HCV) journal May 2012
A Hepatitis C Virus (HCV) Vaccine Comprising Envelope Glycoproteins gpE1/gpE2 Derived from a Single Isolate Elicits Broad Cross-Genotype Neutralizing Antibodies in Humans journal March 2013
Hepatitis C Virus Genotype Diversity among Intravenous Drug Users in Yunnan Province, Southwestern China journal December 2013

Cited By (12)

Approaching rational epitope vaccine design for hepatitis C virus with meta-server and multivalent scaffolding journal August 2015
Probing the antigenicity of hepatitis C virus envelope glycoprotein complex by high-throughput mutagenesis journal December 2017
Functional expression and characterization of the envelope glycoprotein E1E2 heterodimer of hepatitis C virus journal May 2019
Computational Modeling of Hepatitis C Virus Envelope Glycoprotein Structure and Recognition journal May 2018
Conformational Flexibility in the CD81-Binding Site of the Hepatitis C Virus Glycoprotein E2 journal June 2018
Role of Hepatitis C Virus Envelope Glycoprotein E1 in Virus Entry and Assembly journal June 2018
Designing a B Cell-Based Vaccine against a Highly Variable Hepatitis C Virus journal January 2018
Structural Vaccinology for Viral Vaccine Design journal April 2019
Identification of Novel Functions for Hepatitis C Virus Envelope Glycoprotein E1 in Virus Entry and Assembly journal February 2017
Functional Study of the C-Terminal Part of the Hepatitis C Virus E1 Ectodomain journal August 2018
Broadly Neutralizing Antibodies Targeting New Sites of Vulnerability in Hepatitis C Virus E1E2 journal May 2019
Hepatitis C Virus Envelope Glycoproteins: A Balancing Act of Order and Disorder journal August 2018

Similar Records

Structural basis of hepatitis C virus neutralization by broadly neutralizing antibody HCV1
Journal Article · Mon Oct 29 00:00:00 EDT 2012 · Proc. Natl. Acad. Sci. USA · OSTI ID:1046254

Hepatitis C Virus E2 Envelope Glycoprotein Core Structure
Journal Article · Tue Aug 26 00:00:00 EDT 2014 · Science · OSTI ID:1154700

Cryo-EM structures elucidate neutralizing mechanisms of anti-chikungunya human monoclonal antibodies with therapeutic activity
Journal Article · Sun Oct 25 20:00:00 EDT 2015 · Proceedings of the National Academy of Sciences of the United States of America · OSTI ID:1229894