Construction of atomic models of full hepatitis B vaccine particles at different stages of maturation

• Published in: Journal of molecular graphics & modelling 2020-07, Vol.98, p.107610-107610, Article 107610
• Main Authors: Berthier, Laurent, Brass, Olivier, Deleage, Gilbert, Terreux, Raphaël
• Format: Article
• Language: English
• Subjects: ab-initio modeling; Docking; HBsAg particle; HBV; Iterative threading; MDFF; Molecular dynamics; Molecular modeling
• ISSN: 1093-3263; 1873-4243
• DOI: 10.1016/j.jmgm.2020.107610

Hepatitis B, one of the world’s most common liver infections, is caused by the Hepatitis B Virus (HBV). Via the infected cells, this virus generates non pathogen particles with similar surface structures as those found in the full virus. These particles are used in a recombinant form (HBsAg) to produce efficient vaccines. The atomic structure of the HBsAg particles is currently unsolved, and the only existing structural data for the full particle were obtained by electronic microscopy with a maximum resolution of 12 Å. As many vaccines, HBsAg is a complex bio-system. This complexity results from numerous sources of heterogeneity, and traditional bio-immuno-chemistry analytic tools are often limited in their ability to fully describe the molecular surface or the particle. For the Hepatitis B vaccine particle (HBsAg), no atomic data are available so far. In this study, we used the principal well-known elements of HBsAg structure to reconstitute and model the full HBsAg particle assembly at a molecular level (protein assembly, particle formation and maturation). Full HBsAg particle atomic models were built based on an exhaustive experimental data review, amino acid sequence analysis, iterative threading modeling, and molecular dynamic approaches. [Display omitted] •HBsAg particles are used to product efficient vaccines against HBV.•The atomic structure of the HBsAg particles is currently unsolved.•Only low resolution cryo-EM data are available.•We used modeling, docking and MDFF to construct an atomic model of the particle.•Our model fits the experimental data and gives insights about the maturation process.