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Journal of Virology, January 1999, p. 787-790, Vol. 73, No. 1
Unité INSERM 404 "Immunity and
Vaccination,
Received 27 July 1998/Accepted 8 October 1998
Although measles virus is an antigenically monotypic virus,
nucleotide sequence analysis of the hemagglutinin and nucleoprotein genes has permitted the differentiation of a number of genotypes. In
contrast, the fusion (F) protein is highly conserved; only three amino
acid changes have been reported over a 40-year period. We have isolated
a measles virus strain which did not react with an anti-F monoclonal
antibody (MAb) which we had previously shown to be directed against a
dominant antigenic site. This virus strain, Lys-1, had seven amino acid
changes compared with the Edmonston strain. We have shown that a single
amino acid at position 73 is responsible for its nonreactivity with the
anti-F MAb. With the same MAb, antibody-resistant mutants were prepared
from the vaccine strain. A single amino acid change at position 73 (R
0022-538X/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
Characterization of a Natural Mutation in an
Antigenic Site on the Fusion Protein of Measles Virus That Is Involved
in Neutralization
W) was observed. The possibility of selecting measles virus
variants in vaccinated populations is discussed.
*
Corresponding author. Mailing address: Unité
INSERM 404, Immunité et Vaccination, Bâtiment Ex-Institut
Pasteur de Lyon, Avenue Tony Garnier, 69372 Lyon Cedex 07, France.
Phone: 33 4 72 72 25 53. Fax: 33 4 72 72 25 67. E-mail:
wild{at}lyon151.inserm.fr.
Journal of Virology, January 1999, p. 787-790, Vol. 73, No. 1
0022-538X/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
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