Efficient production of active chicken avidin using a bacterial signal peptide in Escherichia coli

VR Hytönen, OH Laitinen, Tomi Airenne, H Kidron, NJ Meltola, EJ Porkka, J Hörhä, T Paldanius, Määttä JAE, HR Nordlund, Mark S Johnson, Tiina Salminen, KJ Airenne, S Ylä-Herttuala, MS Kulomaa

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    67 Citeringar (Scopus)

    Sammanfattning

    Chicken avidin is a highly popular tool with countless applications in the life sciences. In the present study, an efficient method for producing avidin protein in the periplasmic space of Escherichia coli in the active form is described. Avidin was produced by replacing the native signal sequence of the protein with a bacterial OmpA secretion signal. The yield after a single 2-iminobiotin-agarose affinity purification step was approx. 10 mg/l of virtually pure avidin. Purified avidin had 3.7 free biotin-binding sites per tetramer and showed the same biotin-binding affinity and thermal stability as egg-white avidin. Avidin crystallized under various conditions, which will enable X-ray crystallographic studies. Avidin produced in E. coli lacks the carbohydrate chains of chicken avidin and the absence of glycosylation should decrease the nonspecific binding that avidin exhibits towards many materials [Rosebrough and Hartley (1996) J. Nucl. Med. 37, 1380-1384]. The present method provides a feasible and inexpensive alternative for the production of recombinant avidin, avidin mutants and avidin fusion proteins for novel avidin-biotin technology applications.
    OriginalspråkOdefinierat/okänt
    Sidor (från-till)385–390
    Antal sidor6
    TidskriftBiochemical Journal
    Volym384
    Nummer2
    DOI
    StatusPublicerad - 2004
    MoE-publikationstypA1 Tidskriftsartikel-refererad

    Nyckelord

    • bacterial
    • chicken avidin
    • expression system
    • Biotin
    • avidin-biotin technology

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