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J Gen Virol 70 (1989), 1861-1869; DOI 10.1099/0022-1317-70-7-1861
© 1989 Society for General Microbiology
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Partial Nucleotide Sequence of Potato Virus M RNA Shows Similarities to Potexviruses in Gene Arrangement and the Encoded Amino Acid Sequences

V. V. Rupasov1,{dagger}, S. Yu. Morozov2, K. V. Kanyuka1 and S. K. Zavriev1

1 All-Union Research Institute of Agricultural Biotechnology, Moscow 127253
and2 Department of Virology, Moscow State University, Moscow 119899, U.S.S.R.

The nucleotide sequence of the 3'-proximal 2630 nucleotides of potato virus M (PVM) genomic RNA was determined. The sequenced region contained five long open reading frames (ORFs). The ORF nearest to the 3'-terminal poly(A) tail corresponds to a polypeptide of Mr 10848. This ORF is preceded by one which encodes a protein of Mr 33906 (34K) which has an amino acid sequence that is very similar in its carboxyterminal part to that of the coat proteins of some potexviruses. Three other ORFs encoding polypeptides of Mr 24615, 11893 and 6739 are present in the region 5' to the 34K protein gene. There is extensive similarity between these proteins and the corresponding proteins encoded by the conserved triple gene block in the RNA of potexviruses.

Keywords: potato virus M, nucleotide sequence, potexviruses

{dagger} Dr V. V. Rupasov died on 15 December 1988.

Received 29 November 1988; accepted 28 March 1989.


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