A single-chain variable fragment selected against a conformational epitope of a recombinantly produced snake toxin using phage display. 2023

Charlotte Rimbault, and Pelle D Knudsen, and Anna Damsbo, and Kim Boddum, and Hanif Ali, and Celeste M Hackney, and Lars Ellgaard, and Markus-Frederik Bohn, and Andreas H Laustsen
Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark.

Phage display technology is a powerful tool for selecting monoclonal antibodies against a diverse set of antigens. Within toxinology, however, it remains challenging to generate monoclonal antibodies against many animal toxins, as they are difficult to obtain from venom. Recombinant toxins have been proposed as a solution to overcome this challenge, but so far, few have been used as antigens to generate neutralizing antibodies. Here, we describe the recombinant expression of α-cobratoxin in E. coli and its successful application as an antigen in a phage display selection campaign. From this campaign, an scFv (single-chain variable fragment) was isolated with similar binding affinity to a control scFv generated against the native toxin. The selected scFv recognizes a structural epitope, enabling it to inhibit the interaction between the acetylcholine receptor and the native toxin in vitro. This approach represents the first entirely in vitro antibody selection strategy for generating neutralizing monoclonal antibodies against a snake toxin.

UI MeSH Term Description Entries
D004926 Escherichia coli A species of gram-negative, facultatively anaerobic, rod-shaped bacteria (GRAM-NEGATIVE FACULTATIVELY ANAEROBIC RODS) commonly found in the lower part of the intestine of warm-blooded animals. It is usually nonpathogenic, but some strains are known to produce DIARRHEA and pyogenic infections. Pathogenic strains (virotypes) are classified by their specific pathogenic mechanisms such as toxins (ENTEROTOXIGENIC ESCHERICHIA COLI), etc. Alkalescens-Dispar Group,Bacillus coli,Bacterium coli,Bacterium coli commune,Diffusely Adherent Escherichia coli,E coli,EAggEC,Enteroaggregative Escherichia coli,Enterococcus coli,Diffusely Adherent E. coli,Enteroaggregative E. coli,Enteroinvasive E. coli,Enteroinvasive Escherichia coli
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D000911 Antibodies, Monoclonal Antibodies produced by a single clone of cells. Monoclonal Antibodies,Monoclonal Antibody,Antibody, Monoclonal
D000939 Epitopes Sites on an antigen that interact with specific antibodies. Antigenic Determinant,Antigenic Determinants,Antigenic Specificity,Epitope,Determinant, Antigenic,Determinants, Antigenic,Specificity, Antigenic
D001435 Bacteriophages Viruses whose hosts are bacterial cells. Phages,Bacteriophage,Phage
D012910 Snake Venoms Solutions or mixtures of toxic and nontoxic substances elaborated by snake (Ophidia) salivary glands (Duvernoy's gland) for the purpose of killing prey or disabling predators and delivered by grooved or hollow fangs. They usually contain enzymes, toxins, and other factors. Duvernoy's Gland Secretion,Duvernoy's Secretion,Snake Toxin,Snake Toxins,Snake Venom,Duvernoy Gland Secretion,Duvernoy Secretion,Duvernoys Gland Secretion,Duvernoys Secretion,Secretion, Duvernoy's,Secretion, Duvernoy's Gland,Toxin, Snake,Venom, Snake
D057127 Single-Chain Antibodies A form of antibodies consisting only of the variable regions of the heavy and light chains (FV FRAGMENTS), connected by a small linker peptide. They are less immunogenic than complete immunoglobulin and thus have potential therapeutic use. Fv Antibody Fragments, Single-Chain,ScFv Antibodies,Single-Chain Fv,Single-Chain Fv Antibody,Single-Chain Fv Antibody Fragments,Single-Chain Variable Fragment,Single-Chain Variable Fragment Antibodies,Single-Chain Variable Fragment Antibody,Single-Chain Variable Fragments,Antibodies, ScFv,Antibodies, Single-Chain,Antibody, Single-Chain Fv,Fragment, Single-Chain Variable,Fragments, Single-Chain Variable,Fv Antibody Fragments, Single Chain,Fv Antibody, Single-Chain,Fv, Single-Chain,Single Chain Antibodies,Single Chain Fv,Single Chain Fv Antibody,Single Chain Fv Antibody Fragments,Single Chain Variable Fragment,Single Chain Variable Fragment Antibodies,Single Chain Variable Fragment Antibody,Single Chain Variable Fragments,Variable Fragment, Single-Chain,Variable Fragments, Single-Chain
D019151 Peptide Library A collection of cloned peptides, or chemically synthesized peptides, frequently consisting of all possible combinations of amino acids making up an n-amino acid peptide. Phage Display Peptide Library,Random Peptide Library,Peptide Phage Display Library,Phage Display Library, Peptide,Synthetic Peptide Combinatorial Library,Synthetic Peptide Library,Libraries, Peptide,Libraries, Random Peptide,Libraries, Synthetic Peptide,Library, Peptide,Library, Random Peptide,Library, Synthetic Peptide,Peptide Libraries,Peptide Libraries, Random,Peptide Libraries, Synthetic,Peptide Library, Random,Peptide Library, Synthetic,Random Peptide Libraries,Synthetic Peptide Libraries

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