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J Virol. 1993 March; 67(3): 1712-1715

Cloning and characterization of human astrovirus immunoreactive epitopes.

S M Matsui, J P Kim, H B Greenberg, L M Young, L S Smith, T L Lewis, J E Herrmann, N R Blacklow, K Dupuis and G R Reyes

Department of Medicine (Gastroenterology), Stanford University School of Medicine, California 94305.

ABSTRACT

We report the cloning of antigenic, protein-coding regions of human astrovirus serotype 1 that appear to be common to most, if not all, serotypes of human astrovirus. Screening of lambda gt11 libraries identified three different but overlapping clones (A43, A35, and A1) and one independent clone (A14) that reacted with serum from a rabbit repeatedly immunized with purified astrovirus particles but not with its preimmunization serum. These clones were shown to be astrovirus specific. Of note, a radiolabeled probe representing the immunoreactive clones A43-A35-A1 hybridized exclusively to the 7.2-kb astrovirus genomic RNA, while a clone A14-specific probe hybridized with both the genomic and the 2.8-kb astrovirus subgenomic RNAs. This suggests that the immunoreactive epitopes, selected by antiserum to purified astrovirus particles, are encoded by the subgenomic RNA as well as other regions of the genomic RNA.

J Virol. 1993 March; 67(3): 1712-1715




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