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The vesicular stomatitis virus L protein possesses the mRNA methyltransferase activities


The vesicular stomatitis virus L protein possesses the mRNA methyltransferase activities



Virology 163(1): 222-225



ISSN/ISBN: 0042-6822

PMID: 2831658

DOI: 10.1016/0042-6822(88)90253-x

We have previously shown that the vesicular stomatitis virus (VSV) host range mutant, hr 1, is completely defective for the mRNA methyltransferase activities, but can synthesize full-length, unmethylated mRNAs in vitro [S. M. Horikami and S. A. Moyer (1982), . Proc. Nail. Acad. Sci. USA 79, 7694ā€“7698] and in vivo [S. M. Horikami, F. De Ferra, and S. A. Moyer (1984). Virology 138, 1ā€“15]. Here we have used the hr 1 mutant to identify the viral protein which possesses the methyltransferase activities. The wild-type VSV L and NS proteins, subunits of the viral RNA polymerase, were separately purified and added to high salt dissociated mutant hr 1 nucleocapsids for in vitro transcription reactions. The results show that the purified wild-type L protein, but not the NS protein, restores methylation and thus possesses the viral mRNA methyltransferase activities.

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Accession: 018182157

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