Marked differences in the antigenic structure of human respiratory syncytial virus F and G glycoproteins.

AUTOR(ES)

García-Barreno, B

RESUMO

Monoclonal antibodies directed against the glycoproteins of human respiratory syncytial virus were used in competitive enzyme-linked immunosorbent assays for topological mapping of epitopes. Whereas epitopes of the F glycoprotein could be ascribed to five nonoverlapping antigenic sites, anti-G antibodies recognized unique epitopes, many of whose competition profiles overlapped extensively. Variant viruses selected with a neutralizing (47F) anti-F antibody lost the binding for only 47F and 49F antibodies, which mapped in the same antigenic area. In contrast, viruses selected with an anti-G antibody lost the capacity to bind most of the anti-G antibodies, and their G protein was not recognized by an anti-virus antiserum, indicating major changes in the antigenic structure of the G molecule. Finally, we found great antigenic variation of the G protein among viral isolates. This occurred even within viruses of the same subtype with only limited divergence of amino acid sequence between strains. All of these data indicate marked differences in the antigenic organization of the G and F glycoproteins of respiratory syncytial virus; we discuss these differences in terms of the chemical structure of the glycoproteins.

Documentos Relacionados

• Antigenic relatedness between glycoproteins of human respiratory syncytial virus subgroups A and B: evaluation of the contributions of F and G glycoproteins to immunity.
• Antigenic Structure of Human Respiratory Syncytial Virus Fusion Glycoprotein
• Differential immunoglobulin G subclass antibody titers to respiratory syncytial virus F and G glycoproteins in adults.
• Serum immunoglobulin G antibody subclass responses to respiratory syncytial virus F and G glycoproteins after primary infection.
• Antigenic structure of the central conserved region of protein G of bovine respiratory syncytial virus.