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Journal of Virology, June 2001, p. 5429-5432, Vol. 75, No. 11
0022-538X/01/$04.00+0   DOI: 10.1128/JVI.75.11.5429-5432.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.

Defective Interfering RNAs of a Satellite Virus

Wenping Qiudagger and Karen-Beth G. Scholthof*

Department of Plant Pathology and Microbiology, Texas A&M University, College Station, Texas 77843-2132

Received 7 December 2000/Accepted 7 March 2001

Panicum mosaic virus (PMV) is a recently molecularly characterized RNA virus with the unique feature of supporting the replication of two subviral RNAs in a few species of the family Gramineae. The subviral agents include a satellite RNA (satRNA) that is devoid of a coding region and the unrelated satellite panicum mosaic virus (SPMV) that encodes its own capsid protein. Here we report the association of this complex with a new entity in the RNA world, a defective-interfering RNA (DI) of a satellite virus. The specificity of interactions governing this four-component viral system is illustrated by the ability of the SPMV DIs to strongly interfere with the accumulation of the parental SPMV. The SPMV DIs do not interfere with PMV satRNA, but they do slightly enhance the rate of spread and titer of PMV. The SPMV-derived DIs provide an additional avenue by which to investigate fundamental biological questions, including the evolution and interactions of infectious RNAs.

* Corresponding author. Mailing address: Department of Plant Pathology and Microbiology, Texas A&M University, 2132 TAMU, College Station, TX 77843-2132. Phone: (979) 845-8265. Fax: (979) 845-6483. E-mail: kbgs{at}acs.tamu.edu.

dagger Present address: Department of Fruit Science, Southwest Missouri State University, Mountain Grove, MO 65711.

Journal of Virology, June 2001, p. 5429-5432, Vol. 75, No. 11
0022-538X/01/$04.00+0   DOI: 10.1128/JVI.75.11.5429-5432.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.


This article has been cited by other articles:

  • Omarov, R. T., Qi, D., Scholthof, K.-B. G. (2005). The Capsid Protein of Satellite Panicum Mosaic Virus Contributes to Systemic Invasion and Interacts with Its Helper Virus. J. Virol. 79: 9756-9764 [Abstract] [Full Text]  


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