Identification of biotinylated molecules using a baculovirus-expressed luciferase-streptavidin fusion protein

Matti Karp, Christer Lindqvist, Rainer Nissinen, S. Wahlbeck, Karl Åkerman, Christian Oker-Blom (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

25 Citations (Scopus)


A genetic fusion between streptavidin of Streptomyces avidinii and luciferase of Pyrophorus plagiophthalamus was constructed. The fusion protein was produced in the Sf9 insect cell line using the baculovirus expression vector system (REVS). Sodium dodecyl sulfate polyacrylamide gel electrophoresis of the protei nsfrom cells infected with the recombinant virus, VL1393-LucGR-StreptAv, revealed that the fusion protein migrated with an apparent molecular weight of 75 kDa. Light emission measurements showed that the infected cells produced about 255 mg of the chimeric protein per liter of cell culture (127.5 μg/1 × 106 cells). Precipitation of the LucGR-StreptAv fusion protein with biotinylated acrylic beads as well as immunoblot analyses using biotinylated immunoglobulins indicated that both fusion moieties of the chimeric protein product were functional with respect to their physical and enzymatic activities.
Original languageEnglish
Pages (from-to)452-459
Issue number3
Publication statusPublished - 1996
MoE publication typeA1 Journal article-refereed


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