Support of a cucumber mosaic virus satellite RNA maps to a single amino acid proximal to the helicase domain of the helper virus

Marilyn J. Roossinck, Igor Kaplan, Peter Palukaitis

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

Cucumber mosaic virus (CMV) is a tripartite RNA virus that can support the replication of satellite RNAs, small molecular parasites of the virus. Satellite RNAs can have a dramatic effect on the helper virus and the host plant in a manner specific to the helper, satellite, and host. Previously, we showed that the Sny-CMV strain is not able to support the replication of the WL1 satellite RNA in zucchini squash and that this phenotype maps to RNA 1. In the present study, we use recombinant cDNA clones of Fny- and Sny-CMV RNA 1 and a site-directed mutant of Fny-CMV RNA 1 to demonstrate that the inability to support WL1 satellite RNA maps to a single amino acid at residue 978 in the 1a protein, proximal to the helicase domain VI. Support of satellite RNA in whole plants and in protoplasts of zucchini squash is analyzed.

Original languageEnglish (US)
Pages (from-to)608-612
Number of pages5
JournalJournal of Virology
Volume71
Issue number1
StatePublished - 1997

All Science Journal Classification (ASJC) codes

  • Immunology

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