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Retrieval of human cytomegalovirus glycoprotein B from the infected cell surface for virus envelopment

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Summary

Surface biotinylation of human cytomegalovirus (HCMV)-infected fibroblasts under pulse-chase conditions was used to define the cellular route of the dominant viral envelope glycoprotein gB into the cytoplasmic compartment of viral maturational envelopment. The results showed that a major fraction of gB was re-internalized from the infected cell surface prior to incorporation into the viral envelope. Viral particles carrying biotinylated gB were subsequently released into the culture medium. Viral release appeared to be inhibited in the presence of gB-specific antibody or when infected cultures were incubated at room temperature, but was not reduced by inhibitors of cellular glycoprotein transport. To our knowledge this is the first report describing that HCMV gB is retrieved from the infected cell surface prior to viral envelopment.

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Authors and Affiliations

  1. Institut für Virologie, Marburg, Germany

    K. Radsak, M. Eickmann, T. Mockenhaupt, E. Bogner & M. Reschke

  2. Institut für Zellbiologie der Philipps-Universität, Marburg, Germany

    H. Kern

  3. Institut für Medizinische Mikrobiologie und Immunologie, Bonn, Germany

    A. Eis-Hübinger

Authors
  1. K. Radsak
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  2. M. Eickmann
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  3. T. Mockenhaupt
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  4. E. Bogner
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  5. H. Kern
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  6. A. Eis-Hübinger
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  7. M. Reschke
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Radsak, K., Eickmann, M., Mockenhaupt, T. et al. Retrieval of human cytomegalovirus glycoprotein B from the infected cell surface for virus envelopment. Archives of Virology 141, 557–572 (1996). https://doi.org/10.1007/BF01718317

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  • DOI: https://doi.org/10.1007/BF01718317

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