Simonovic M, Mix T, Glumac M, Pejin B. 3.5-scFv-β-lactamase, a new protein detector of picric acid, the highly nitrated organic explosive.
Nat Prod Res 2020;
36:1317-1320. [PMID:
33336580 DOI:
10.1080/14786419.2020.1860977]
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Abstract
A new protein detector of 2,4,6-trinitrophenol (TNP, picric acid) is concisely reported herein for the first time. In brief, the gene of a specific scFv fragment, namely 3.5, was fused separately with the gene of β-lactamase and, subsequently, expressed in the periplasmic space of Escherichia coli, affording in such a way the recombinant fusion protein 3.5-scFv-β-lactamase. This bifunctional immunoreagent tool was further convincingly demonstrated for being capable to directly detect trinitrophenol-tris(hydroxymethyl)aminomethane (TNP-Tris), a less toxic TNP derivative of choice compared to TNP itself, with competitive sensitivity (50 ± 2 fmol or 175 ± 6 pg/mL).
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