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J Virol, February 1998, p. 1377-1382, Vol. 72, No. 2
Max von Pettenkofer-Institut für Hygiene und
Medizinische Mikrobiologie, University of Munich, D-80336 Munich,
Germany,1 and
Department of Histology
and Embryology, Faculty of Medicine, University of Rijeka, 51000 Rijeka, Croatia2
Received 28 July 1997/Accepted 27 October 1997
The murine cytomegalovirus (MCMV) fcr-1 gene codes for
a glycoprotein located at the surface of infected cells which strongly binds the Fc fragment of murine immunoglobulin G. To determine the
biological significance of the fcr-1 gene during viral
infection, we constructed MCMV fcr-1 deletion mutants and
revertants. The fcr-1 gene was disrupted by insertion of
the Escherichia coli lacZ gene. In another mutant, the
marker gene was also deleted, by recombinase cre. As
expected for its hypothetical role in immunoevasion, the infection of
mice with fcr-1 deletion mutants resulted in significantly
restricted replication in comparison with wild-type MCMV and revertant
virus. In mutant mice lacking antibodies, however, the
fcr-1 deletion mutants also replicated poorly. This
demonstrated that the cell surface-expressed viral glycoprotein with
FcR activity strongly modulates the virus-host interaction but
that this biological function is not caused by the immunoglobulin
binding property.
0022-538X/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
Virus Attenuation after Deletion of the
Cytomegalovirus Fc Receptor Gene Is Not due to Antibody
Control
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*
Corresponding author. Mailing address: Max von
Pettenkofer-Institut, Pettenkoferstr. 9a, D-80336 Munich, Germany.
Phone: 49 89 5160 5290. Fax: 49 89 5160 5292. E-mail:
koszinowski{at}m3401.mpk.med.uni-muenchen.de
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