Location of antigenic sites defined by neutralizing monoclonal antibodies on the S1 avian infectious bronchitis virus glycopolypeptide

J Gen Virol. 1992 Mar;73 ( Pt 3):591-6. doi: 10.1099/0022-1317-73-3-591.

Abstract

Neutralizing monoclonal antibodies directed against five antigenic sites on the spike (S) S1 glycopolypeptide of avian infectious bronchitis virus (IBV) were used to select neutralization-resistant variants of the virus. By comparing the nucleotide sequence of such variants with the sequence of the IBV parent strain, we located five antigenic sites on the amino acid sequence of the S1 glycopolypeptide. The variants had mutations within three regions corresponding to amino acid residues 24 to 61, 132 to 149 and 291 to 398 of the S1 glycopolypeptide. The location of three overlapping antigenic sites on the IBV spike protein was similar to the location of antigenic sites on the spike protein of other coronaviruses.

Publication types

  • Comparative Study

MeSH terms

  • Antibodies, Monoclonal
  • Chromosome Mapping
  • Coronaviridae Infections / immunology*
  • DNA Mutational Analysis
  • Epitopes / immunology*
  • Genetic Variation
  • Glycoproteins / immunology*
  • Infectious bronchitis virus / chemistry
  • Infectious bronchitis virus / immunology*
  • Membrane Glycoproteins*
  • Protein Conformation
  • Spike Glycoprotein, Coronavirus
  • Viral Envelope Proteins / immunology*

Substances

  • Antibodies, Monoclonal
  • Epitopes
  • Glycoproteins
  • Membrane Glycoproteins
  • Spike Glycoprotein, Coronavirus
  • Viral Envelope Proteins