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    Folding and oligomerization of the gp2b/gp3/gp4 spike proteins of equine arteritis virus in vitro (2012)

    Art
    Zeitschriftenartikel / wissenschaftlicher Beitrag
    Autoren
    Kabatek, Aleksander (WE 5)
    Veit, Michael (WE 5)
    Quelle
    Viruses; 4(3) — S. 414–423
    ISSN: 1999-4915
    Sprache
    Englisch
    Verweise
    URL (Volltext): http://edocs.fu-berlin.de/docs/receive/FUDOCS_document_000000019966
    DOI: 10.3390/v4030414
    Pubmed: 22590679
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    Abstract / Zusammenfassung

    Equine arteritis virus (EAV) is a small, positive-stranded RNA virus. The glycoproteins gp2b, gp3 and gp4 form a heterotrimer in the viral envelope, which is required for cell entry of EAV. We describe expression of the ectodomains of the proteins in E. coli and their refolding from inclusion bodies. After extraction of inclusion bodies and dialysis, Gst-, but not His-tagged proteins, refold into a soluble conformation. However, when dialyzed together with Gst-gp3 or with Gst-gp4, His-gp2b and His-gp4 remain soluble and oligomers are obtained by affinity-chromatography. Thus, folding and oligomerization of gp2b, gp3 and gp4 in vitro are interdependent processes.