Human papillomavirus type 6 virus-like particles present overlapping yet distinct conformational epitopes

J Gen Virol. 2003 Jun;84(Pt 6):1493-1497. doi: 10.1099/vir.0.18872-0.

Abstract

The epitope for a human papillomavirus (HPV) type 6 conformation-dependent, neutralizing monoclonal antibody (mAb) was partially mapped using HPV L1 recombinant virus-like particles (VLPs). The mAb H6.J54 is cross-reactive with the closely related HPV types 6 and 11. By making HPV-6-like amino acid substitutions in the cottontail rabbit papillomavirus (CRPV) major capsid protein L1, we were able to transfer H6.J54 binding activity into a CRPV/HPV-6 hybrid L1 protein. Full binding activity was achieved with only nine amino acid changes and identified a region centred on the HPV-6 residues 49-54. This region has previously been shown to be a critical part of HPV-6 type-specific epitopes. Fine mapping of the region by scanning a series of alanine substitution mutations showed that in HPV-6 VLPs this type-common epitope overlaps HPV-6 type-specific epitopes.

MeSH terms

  • Amino Acid Sequence
  • Amino Acid Substitution
  • Antibodies, Monoclonal
  • Antigens, Viral* / chemistry
  • Antigens, Viral* / genetics
  • Cross Reactions
  • Epitope Mapping
  • Epitopes / chemistry
  • Epitopes / genetics
  • Humans
  • Molecular Sequence Data
  • Mutagenesis, Site-Directed
  • Papillomaviridae / genetics
  • Papillomaviridae / immunology*
  • Protein Conformation
  • Viral Proteins / chemistry
  • Viral Proteins / genetics
  • Viral Proteins / immunology

Substances

  • Antibodies, Monoclonal
  • Antigens, Viral
  • Epitopes
  • Viral Proteins