Epitope identification of specific naturally occurring human anti-AVIDIN (cas 1405-69-2) antibodies

Add time:09/26/2019    Source:sciencedirect.com

Human serum contains natural antibodies against avidin. Affinity purified natural anti-avidin human IgG exhibits affinity constants comparable to those of antibodies produced by active immunization of rabbits. Using a random hexapeptide library displayed on the filamentous M13 phage, and rabbit anti-avidin purified antibodies as a selector, we searched for epitopes shared by both selector and natural human anti-avidin IgG. This approach, enabled the isolation and identification of phagotopes bearing consensus motifs similar to sequence stretches of the avidin loops and β-sheet regions. These phagotopes were recognized by the natural human anti-avidin antibodies. The fact that natural anti-avidin antibodies in human serum have similar epitopes to those of IgG elicited by active immunization of animals, led us to suggest that small peptide epitopes may prevent deleterious effects caused by antibodies formed against food proteins as well as therapeutic proteins.

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