Novel fusion protein of human igg1 heavy chain constant...

Details Novel fusion protein of human igg1 heavy chain constant... Novel fusion protein of human igg1 heavy chain constant...

C - Chemistry, Metallurgy

12

N

C12N 15/13 (2006.01) C07K 19/00 (2006.01)

Patent

CA 2420829

Construction of a recombinant gene fusion encoding a human IgG1 heavy chain constant region and a single-chain variable fragment antibody of 1A4A1 monoclonal antibody is disclosed. The recombinant antibody of the present invention confers human immune effector functions on marine antibodies. After expression in bacteria as inclusion bodies, the recombinant antibody was purified and refolded in vitro. The recombinant soluble antibody retains high antigen-binding affinity to VEE and possesses some human IgG crystallizable fragment domain functions. On non-reducing gel electrophoresis analysis, disulfide bond formation was found in the hinge region of the recombinant antibody. The present invention shows that the recombinant antibody is in a native, functionally active form and it provides the basis to characterize the recombinant antibody for efficacy in vivo.

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