Fabrication of an antibody microwell array with self-adhering antibody binding protein.
One of the promising methods of preparing antibody arrays is immobilizing antibodies with protein A or protein G, each of which binds specifically to the heavy chain constant (Fc) region of immunoglobulin G (IgG). In this system, antibody immobilization efficiency depends on the number of active Fc binding proteins that need to be immobilized on the surface. Here we have designed and constructed an Fc binding protein with a self-adhering ability that can be immobilized on the hydrophobic surface by simple adsorption. It consists of an Fc binding domain of protein G (G3) and hydrophobic domain of elastin (E72). Direct observation revealed its self-adhering ability on the hydrophobic surface. The enzyme-linked immunosorbent assay (ELISA) showed that it retained antibody binding ability on the surface. The antibody array model was prepared on a hydrophobic microwell glass slide with E72G3, which specifically detect the antigen with a sevenfold greater sensitivity than the G3-treated slide. These results suggest that the E72G3 is useful for simple and effective immobilization of antibodies and can be used to fabricate any immuno devices.
Tanaka
Gen
G
Department of Biological Information, Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan.
Funabashi
Hisakage
H
Mie
Masayasu
M
Kobatake
Eiry
E
D000818:Animals; D000906:Antibodies / Q000737:chemistry*; D000937:Antigen-Antibody Reactions; D000942:Antigens, Bacterial / Q000737:chemistry; D001426:Bacterial Proteins / Q000276:immunology; D002645:Chickens; D004797:Enzyme-Linked Immunosorbent Assay / Q000295:instrumentation / Q000379:methods; D005453:Fluorescence; D057927:Hydrophobic and Hydrophilic Interactions; D007074:Immunoglobulin G / Q000737:chemistry; D051379:Mice; D018625:Microscopy, Atomic Force; D040081:Protein Array Analysis / Q000295:instrumentation / Q000379:methods*; D011993:Recombinant Fusion Proteins / Q000737:chemistry
D000906:Antibodies; D000942:Antigens, Bacterial; D001426:Bacterial Proteins; C034284:IgG Fc-binding protein, Streptococcus; D007074:Immunoglobulin G; D011993:Recombinant Fusion Proteins