Immunoaffinity purification of baculovirus-expressed rubella virus E1 for diagnostic purposes

Christer Lindqvist, Michel Schmidt, Johanna Heinola, Risto Jaatinen, Monica Österblad, Aimo Salmi, Sirkka Keränen, Karl Åkerman, Christian Oker-Blom

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Abstract

Three monoclonal antibodies, termed 4E10, 1E11:10, and 2D9:1, were generated against rubella virus. Immunoblot analysis with purified authentic rubella virus or recombinant baculovirus-expressed rubella virus structural proteins E1, E2, and C demonstrated that they were directed against the E1 envelope glycoprotein of the rubella virus particle. By using the yeast Ty virus-like particle system, it was possible to map the binding site of 1E11:10 within amino acids 236 to 286 of the E1 protein and the binding sites of 2D9:1 and 4E10 outside this region. Immunoaffinity purification with these monoclonal antibodies made it evident that they are useful for obtaining large quantities of pure baculovirus-expressed rubella virus envelope protein E1. The diagnostic potential of this immunoaffinity-purified recombinant rubella virus E1 protein compared with that of authentic rubella virus is demonstrated.

Original languageEnglish
Pages (from-to)2192-2196
Number of pages5
JournalJournal of Clinical Microbiology
Volume32
Issue number9
Publication statusPublished - 1994
MoE publication typeA1 Journal article-refereed

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    Lindqvist, C., Schmidt, M., Heinola, J., Jaatinen, R., Österblad, M., Salmi, A., Keränen, S., Åkerman, K., & Oker-Blom, C. (1994). Immunoaffinity purification of baculovirus-expressed rubella virus E1 for diagnostic purposes. Journal of Clinical Microbiology, 32(9), 2192-2196. https://jcm.asm.org/content/32/9/2192