Recognition of cis-acting sequences in RNA 3 of Prunus necrotic ringspot virus by the replicase of Alfalfa mosaic virus.
Alfalfa mosaic virus (AMV) and Prunus necrotic ringspot virus (PNRSV) belong to the genera ALFAMOVIRUS: and ILARVIRUS:, respectively, of the family BROMOVIRIDAE: Initiation of infection by AMV and PNRSV requires binding of a few molecules of coat protein (CP) to the 3' termini of the inoculum RNAs and the CPs of the two viruses are interchangeable in this early step of the replication cycle. CIS:-acting sequences in PNRSV RNA 3 that are recognized by the AMV replicase were studied in in vitro replicase assays and by inoculation of AMV-PNRSV RNA 3 chimeras to tobacco plants and protoplasts transformed with the AMV replicase genes (P12 plants). The results showed that the AMV replicase recognized the promoter for minus-strand RNA synthesis in PNRSV RNA 3 but not the promoter for plus-strand RNA synthesis. A chimeric RNA with PNRSV movement protein and CP genes accumulated in tobacco, which is a non-host for PNRSV.
Instituto de Biología Molecular y Celular de Plantas, Universidad Politecnica de Valencia-CSIC, Avenida de los Naranjos s/n, 46022 Valencia, Spain1.
F
F
Aparicio
Institute of Molecular Plant Sciences, Gorlaeus Laboratories, Leiden University, PO Box 9502, 2300 RA Leiden, The Netherlands2.
J A
JA
Sánchez-Navarro
Institute of Molecular Plant Sciences, Gorlaeus Laboratories, Leiden University, PO Box 9502, 2300 RA Leiden, The Netherlands2.
R C L
RCL
Olsthoorn
Instituto de Biología Molecular y Celular de Plantas, Universidad Politecnica de Valencia-CSIC, Avenida de los Naranjos s/n, 46022 Valencia, Spain1.
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V
Pallás
Institute of Molecular Plant Sciences, Gorlaeus Laboratories, Leiden University, PO Box 9502, 2300 RA Leiden, The Netherlands2.
J F
JF
Bol
D020413:3' Untranslated Regions / Q000737:chemistry; D020121:5' Untranslated Regions / Q000737:chemistry; D017794:Alfalfa mosaic virus / Q000235:genetics*; D019179:Ilarvirus / Q000235:genetics*; D011401:Promoter Regions, Genetic; D012367:RNA, Viral / Q000096:biosynthesis* / Q000737:chemistry; D012324:RNA-Dependent RNA Polymerase / Q000502:physiology*; D014779:Virus Replication
D020413:3' Untranslated Regions; D020121:5' Untranslated Regions; D012367:RNA, Viral; D012324:RNA-Dependent RNA Polymerase