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Virion RNA of Beet Yellows Closterovirus: Cell-free Translation and Some Properties

¹ Institute of Microbiology, 117811 Moscow
and² Department of Virology and A. N. Belozersky Laboratory at Moscow State University, 119899 Moscow, U.S.S.R.

Virion RNA of beet yellows virus (BYV) is a messenger-sense RNA of about 14500 nucleotides containing no poly(A) or covalently linked protein. In vitro translation of BYV RNA yielded a prominent polypeptide of M_r 250000, and some lighter products. None of the translation products was found to be immunoprecipitable with anti-BYV -globulins. The synthesis of all the BYV RNA-directed polypeptides was blocked by the cap analogue m⁷Gpp, thus suggesting the presence of a cap structure at the 5' end of virion RNA.

Keywords: beet yellows virus, RNA, translation

Received 13 July 1988; accepted 6 October 1988.