Identification of attenuating mutations on the reovirus type 3 S1 double-stranded RNA segment with a rapid sequencing technique
- PMID: 3528529
- PMCID: PMC253902
- DOI: 10.1128/JVI.60.1.64-67.1986
Identification of attenuating mutations on the reovirus type 3 S1 double-stranded RNA segment with a rapid sequencing technique
Abstract
Reovirus type 3 variants with mutations in the major neutralization domain of the sigma 1 protein have attenuated neurovirulence and restricted neurotropism. We devised a variation of the rapid RNA sequencing technique to facilitate the analysis of double-stranded RNA. We sequenced the S1 double-stranded RNA segment, which encodes the sigma 1 protein, of five attenuated reovirus type 3 variants. Four of the variants have changes in codon 419, and a fifth variant has a change at codon 340, all of which resulted in amino acid substitutions in the sigma 1 protein. We identified two sites on the reovirus type 3 sigma 1 protein that play a critical role in neurovirulence.
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