Literature DB >> 17965209

Development and implementation of a single-chain Fv antibody for specific detection of Bacillus anthracis spores.

A Mechaly1, E Zahavy, M Fisher.   

Abstract

A single-chain Fv (scFv) antibody was developed and applied for efficient and specific detection of Bacillus anthracis spores. The antibody was isolated from a phage display library prepared from spleens of mice immunized with a water-soluble extract of the outer membrane of the B. anthracis spore (exosporium). The library (7 x 10(6) PFU) was biopanned against live, native B. anthracis ATCC delta14185 spores suspended in solution, resulting in the isolation of a unique soluble scFv antibody. The antibody was affinity purified and its affinity constant (3 x 10(8) +/- 1 x 10(8) M(-1)) determined via flow cytometry (FCM). Preliminary characterization of scFv specificity indicated that the scFv antibody does not cross-react with representatives of some phylogenetically related Bacillus spores. The potential use of scFv antibodies in detection platforms was demonstrated by the successful application of the soluble purified scFv antibody in enzyme-linked immunosorbent assays, immunofluorescence assays, and FCM.

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Year:  2007        PMID： 17965209      PMCID： PMC2227706          DOI： 10.1128/AEM.01244-07

Source DB:  PubMed          Journal:  Appl Environ Microbiol        ISSN： 0099-2240            Impact factor:   4.792


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