Monoclonal antibodies to three structural proteins of Newcastle disease virus: biological characterization with particular reference to the conformational change of envelope glycoproteins associated with proteolytic cleavage.
Monoclonal antibodies (MAbs) to the haemagglutinin-neuraminidase (HN), fusion (F) and matrix (M) proteins of Newcastle disease virus were prepared and characterized. At least three non-overlapping or partially overlapping antigenic sites were delineated on the HN, three on the F and three on the M proteins by competitive binding assays. Antigenic sites on the HN and F proteins roughly represented functional domains defined by serological tests. Two antigenic sites on the F protein were involved in virus neutralizing and haemolysis-inhibiting activity. These antigenic determinants were readily affected by treatment with certain surfactants and acetone. Proteolytic cleavage of the HN and F proteins was associated with conformational change, revealed by altered reactivity with MAbs and by altered topological arrangements of some epitopes. None of the anti-M MAbs inhibited any biological activities of the virus.
Umino
Y
Y
Department of Measles Virus, National Institute of Health, Tokyo, Japan.
Kohama
T
T
Sato
T A
TA
Sugiura
A
A
Klenk
H D
HD
Rott
R
R
D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology; D000956:Antigens, Viral / Q000276:immunology*; D001667:Binding, Competitive; D002460:Cell Line; D004591:Electrophoresis, Polyacrylamide Gel; D004797:Enzyme-Linked Immunosorbent Assay; D000939:Epitopes; D005455:Fluorescent Antibody Technique; D015707:HN Protein / Q000276:immunology* / Q000378:metabolism; D009500:Neutralization Tests; D009522:Newcastle disease virus / Q000276:immunology*; D011487:Protein Conformation; D014760:Viral Fusion Proteins / Q000276:immunology* / Q000378:metabolism; D014763:Viral Matrix Proteins / Q000276:immunology* / Q000378:metabolism
D000911:Antibodies, Monoclonal; D000956:Antigens, Viral; D000939:Epitopes; D015707:HN Protein; D014760:Viral Fusion Proteins; D014763:Viral Matrix Proteins