Journal
ANALYTICAL BIOCHEMISTRY
Volume 564, Issue -, Pages 40-46Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ab.2018.10.017
Keywords
TetR protein; Tetracyclines; Molecular docking; Enzyme linked immunosorbent assay; Chemiluminescence; Milk
Funding
- National Natural Science Foundation of China [31801645]
- Shijiazhuang Technology Incubation Project [171550089A]
Ask authors/readers for more resources
This study for the first time reported a receptor based chemiluminescence immunoassay for analysis of tetracyclines. During the experiments, the gene of TetR protein was transformed into Rosetta-gami(DE3) to express a receptor, and its recognition mechanism for 5 tetracyclines was studied by using molecular docking technique. Results showed that hydrophobic interaction and Pi-Pi bond were the main intermolecular forces responsible for TetR-tetracyclines binding, and the D ring was the main receptor binding position in tetracyclines molecules. Then the receptor was used as recognition reagent to develop a direct competitive enzyme linked immunosorbent assay for determination of the 5 drugs in milk, and the light signal was induced with 4-(imidazol-1-yl)-phenol enhanced luminol-H2O2 system. The limits of detection for the 5 drugs in milk were in the range of 5-16 pg/mL, and the recoveries from the standards fortified blank milk were in the range of 71.7%-95.8%. Therefore, this method could be used as a simple, rapid, and ultra-sensitive tool to monitor the residues of tetracyclines in milk.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available