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J Gen Virol 73 (1992), 493-498; DOI 10.1099/0022-1317-73-2-493
© 1992 Society for General Microbiology
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Comparison of the strategies of expression of five tymovirus RNAs by in vitro translation studies

Gress Kadaré{dagger}, Gabrièle Drugeon, H. S. Savithri{ddagger}> and Anne-Lise Haenni

Institut Jacques Monod,§ 2 Place Jussieu - Tour 43, 75251 Paris Cedex 05, France

Total nucleotide sequencing of the RNA genome of various tymoviruses has demonstrated that the overall genome organization of these viruses is identical. Furthermore, the strategies of expression of the turnip yellow mosaic virus (TYMV) genome have been established by in vitro translation studies; these include the synthesis of a subgenomic RNA, the utilization of overlapping open reading frames (ORFs) and maturation of a polyprotein. In the experiments described here, the strategies of expression of other tymovirus (eggplant mosaic virus, ononis yellow mosaic virus, belladonna mottle virus and physalis mottle virus) genomes have been compared to those used by the TYMV genome, in particular to determine whether these tymoviruses also resort to the expression of overlapping ORFs and maturation of a polyprotein.

{dagger} Present address: Unité 248, I.N.S.E.R.M., Faculté de Médecine Lariboisière-Saint-Louis, 10 Avenue de Verdun, 75010 Paris, France.

{ddagger}> Permanent address: Department of Biochemistry, Indian Institute of Science, Bangalore 560 012, India.

§ The Institut Jacques Monod is an ‘Institut Mixte, CNRS-Université Paris 7’.

Received 20 September 1991; accepted 28 October 1991.




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Copyright © 1992 by the Society for General Microbiology.