Expression and characterization of single-chain variable fragment antibody against staphylococcal enterotoxin A in Escherichia coli
- 1 November 2014
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Microbiology
- Vol. 60 (11), 737-743
- https://doi.org/10.1139/cjm-2014-0468
Abstract
The staphylococcal enterotoxins (SEs) are potent gastrointestinal exotoxins synthesized by Staphylococcus aureus, which is responsible for various diseases including septicemia, food poisoning, and toxic shock syndrome, as well as bovine mastitis. Among them, staphylococcal enterotoxin A (SEA) is one of the most commonly present serotypes in staphylococcal food poisoning cases. In this study, the stable hybridoma 3C12 producing anti-SEA monoclonal antibody was established with an equilibrium dissociation constant (KD) of 1.48 × 10−8 mol·L−1, its ScFv-coding genes were obtained and then the anti-SEA single chain variable fragment (ScFv) protein was expressed in Escherichia coli. Characterization of the expressed target ScFv protein was analyzed by sodium dodecyl sulfate – polyacrylamide gel electrophoresis, Western blot, and enzyme-linked immunosorbent assay. The results demonstrated that the recombinant anti-SEA ScFv protein retained a specific binding activity for SEA, and the KD value of the soluble ScFv was about 3.75 × 10−7 mol·L−1. The overall yield of bioactive anti-SEA ScFv in E. coli flask culture was more than 10 mg·L−1.Keywords
This publication has 27 references indexed in Scilit:
- High sensitivity chemiluminescence enzyme immunoassay for detecting staphylococcal enterotoxin A in multi-matricesAnalytica Chimica Acta, 2013
- Piezoelectric immunosensor for direct and rapid detection of staphylococcal enterotoxin A (SEA) at the ng levelBiosensors and Bioelectronics, 2011
- Genotypic characterization ofStaphylococcus aureusisolated from bovines, humans, and food in IndonesiaJournal of Veterinary Science, 2011
- Construction of a Single-Chain Variable-Fragment Antibody against the Superantigen Staphylococcal Enterotoxin BApplied and Environmental Microbiology, 2010
- Generation of Fab Fragment-Like Molecular Recognition Proteins against Staphylococcal Enterotoxin B by Phage Display TechnologyClinical and Vaccine Immunology, 2010
- Staphylococcal EnterotoxinsToxins, 2010
- Isolation and affinity maturation of hapten-specific antibodiesBiotechnology Advances, 2007
- Identification of single-chain antibody fragments specific against SARS-associated coronavirus from phage-displayed antibody libraryBiochemical and Biophysical Research Communications, 2005
- Selection, Characterization and X-ray Structure of Anti-ampicillin Single-chain Fv Fragments from Phage-displayed Murine Antibody LibrariesJournal of Molecular Biology, 2001
- Human Antibodies with Sub-nanomolar Affinities Isolated from a Large Non-immunized Phage Display LibraryNature Biotechnology, 1996