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. 1981 Jun;38(3):940-51.
doi: 10.1128/JVI.38.3.940-951.1981.

Ability of nonpermissive mouse cells to express a simian virus 40 late function(s)

M Lange, E May, P May

Ability of nonpermissive mouse cells to express a simian virus 40 late function(s)

M Lange et al. J Virol. 1981 Jun.

Abstract

Mouse cells are fully nonpermissive for simian virus 40 (SV40). Infection does not lead to detectable virus replication. In this report, it was shown, first, that spliced 16S and 19S SV40 late mRNA were present in cytoplasmic and polysomal polyadenylated acid+ RNA preparations from SV40-infected baby mouse kidney cells. The 16S and 19S SV40 late mRNA's produced in infected baby mouse kidney cells were identical to or similar to the 16S and 19S SV40 late mRNA's produced in permissive monkey cells as judged by their S1 mapping patterns performed with the late strand of HpaII-BamHI fragment B and by their sedimentation patterns in a sucrose gradient. It was also shown that the 16S late mRNA from infected baby mouse kidney cells could be translated into a polypeptide which was identical to or similar to virion protein VP1 in every aspect examined, including the patter of peptide mapping by limited proteolysis. Second, we reported that mouse kidney cells produced detectable, although low, levels of SV40 virion protein VP1, as shown by the sodium dodecyl sulfate-polyacrylamide gel autoradiogram of [35S]methionine-labeled proteins immunoprecipitated by a rabbit antiserum directed against SV40 virion proteins. Third, it was reported that infected baby mouse kidney cells produced late mRNA's either (i) when the infection was done at a restrictive temperature with the nonleaky tsA58 mutant or (ii) in cells treated with 100 microgram of cycloheximide per ml, in which large T antigen synthesis was inhibited by more than 99.9%. This suggested that large T antigen was not required for the synthesis of late mRNA in mouse cells.

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