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J Virol, April 1998, p. 3423-3426, Vol. 72, No. 4
Department of Veterinary Microbiology,
Faculty of Agriculture, Yamaguchi University, Yamaguchi City 753, Japan,1 and
Basic Research Laboratory,
National Cancer Institute, Frederick, Maryland
21702-12012
Received 7 October 1997/Accepted 22 December 1997
PVC-441 murine leukemia virus (MuLV) is a member of the PVC group
of Friend MuLV (F-MuLV)-derived neuropathogenic retroviruses. In order
to determine the molecular basis for the difference in neuropathogenicity between PVC-441 and the previously characterized PVC-211 MuLVs, the entire nucleotide sequence of PVC-441 MuLV was
determined and compared with those of PVC-211 and F-MuLV. The results
suggest that PVC-441 and PVC-211 MuLVs were formed as a result of
random mutations of F-MuLV and developed differently. The distinct
pathogenicities of PVC-441 and PVC-211 MuLVs were maintained in the
viruses regenerated from their molecular clones, and the sequences
responsible for the pathological differences observed can be localized
to the env gene. The amino acid sequence of PVC-441 deduced
from its nucleotide sequence revealed a number of differences from
PVC-211, the most striking of which was a difference at position 129 of
the SU proteins in the two viruses. Host range studies with a brain
capillary endothelial cell line (RTEC-6) and Chinese hamster ovary
cells (CHO-K1) revealed that PVC-441, like PVC-211, could infect these
cells but its efficiency of infection was lower than that of PVC-211.
These results may account for the difference in neuropathogenicity
between PVC-441 and PVC-211.
0022-538X/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
The Entire Nucleotide Sequence of Friend-Related
and Paralysis-Inducing PVC-441 Murine Leukemia Virus (MuLV) and Its
Comparison with Those of PVC-211 MuLV and Friend MuLV
*
Corresponding author. Mailing address: Department of
Veterinary Microbiology, Faculty of Agriculture, Yamaguchi University, Yamaguchi City 753, Japan. Phone and Fax: 81-839-33-5888. E-mail: kkai{at}agr.yamaguchi-u.ac.jp.
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