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Coding assignments of the genome of adult diarrhea rotavirus

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Summary

Adult diarrhea rotavirus (ADRV) has caused epidemics of diarrhea in China since 1982 and remains the only group B rotavirus associated with widespread disease in humans. We recently characterized the proteins of ADRV and have now proceeded to identify the gene segments encoding each protein. Viral RNA transcripts were synthesized in vitro with the endogenous viral RNA polymerase and separated by electrophoresis in agarose. The individual transcripts were translated in a cell-free system using nuclease-treated rabbit reticulocyte lysates. The translation products were compared with polypeptides found in purified virus and were characterized by SDS-PAGE, immunoprecipitation, and Western blot analysis using antisera to double- and single-shelled virions, virus cores, and monoclonal antibodies. Furthermore, individual RNA transcripts were hybridized to total dsRNA to determine their genomic origin. Based on this analysis, the core polypeptides VP1, VP2 and VP3 are encoded by segments 1, 2, and 3, respectively. The main polypeptides in the inner capsid, VP6, and the outer capsid, VP4 and VP7, are encoded by segments 6, 4, and 8 respectively. Segments 5, 7, and 9 code for 60, 45, and 30 kDa nonstructural polypeptides. Two other nonstructural polypeptides (24 and 25 kDa) are derived from gene segment 11. Gene segment 10 codes for a 26 kDa polypeptide that is precipitated with serum to ADRV and may be a structural protein VP9. With this exception, gene coding assignments of ADRV are comparable to those of the group A rotaviruses. Our results have clear implications for further work in cloning, sequencing, and expression genes of ADRV and can provide direction towards understanding the origin and the evolution of this virus.

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Authors and Affiliations

  1. Viral Gastroenteritis Unit, Center for Infectious Diseases, Centers for Disease Control, Atlanta, Georgia, USA

    Z. -Y. Fang, S. S. Monroe, M. Penaranda, V. Gouvea, J. R. Allen & R. I. Glass

  2. Institute of Virology, Chinese Academy of Preventive Medicine, Beijing, China

    Z. -Y. Fang, H. Dong, L. Wen & T. Hung

Authors
  1. Z. -Y. Fang
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  2. S. S. Monroe
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  3. H. Dong
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  4. M. Penaranda
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  5. L. Wen
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  6. V. Gouvea
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  7. J. R. Allen
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  8. T. Hung
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  9. R. I. Glass
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Fang, Z.Y., Monroe, S.S., Dong, H. et al. Coding assignments of the genome of adult diarrhea rotavirus. Archives of Virology 125, 53–69 (1992). https://doi.org/10.1007/BF01309628

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  • DOI: https://doi.org/10.1007/BF01309628

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