Title |
Fluorometric determination of Vibrio parahaemolyticus using an F0F1-ATPase-based aptamer and labeled chromatophores
|
---|---|
Published in |
Microchimica Acta, May 2018
|
DOI | 10.1007/s00604-018-2795-5 |
Pubmed ID | |
Authors |
Nuo Duan, Shijia Wu, Huiling Zhang, Ying Zou, Zhouping Wang |
Abstract |
An F0F1-ATPase-based aptasensor is described for the fluorometric determination of Vibrio parahaemolyticus. Chromatophores containing F0F1-ATPases were first prepared from Rhodospirillum rubrum cells. Then, an aptamer-functionalized chromatophore acts as the capture probe, and a chromatophore labeled with the pH probe fluorescein acts as the signalling probe. In the presence of V. parahaemolyticus, the rotation rate of F0F1-ATPase is decreased due to the formation of the aptamer-chromatophore complex. This leads to a retarded proton flux out of the chromatophores. As a result, the pH value inside the chromatophores is reduced, and the fluorescence of the pH probe F1300 is accordingly decreased. The relative fluorescence varies linearly over the 15 to 1.5 × 106 cfu·mL-1 Vibrio parahaemolyticus concentration range, and the limit of detection is 15 cfu·mL-1. The method was applied to analyze artificially contaminated salmon samples where it showed excellent perfomance. Graphical abstract In this assay, aptamer functionalized chromatophores act as a capture probe, and the fluoresce in labeled chromatophores as signalling probe. The formation of aptamer-chromatophore complex leads to a retarded proton flux out of the chromatophores. As a result, the pH value inside the chromatophores is reduced, and fluorescence intensity is accordingly decreased. |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Unknown | 18 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Bachelor | 3 | 17% |
Student > Ph. D. Student | 3 | 17% |
Researcher | 2 | 11% |
Student > Master | 2 | 11% |
Professor | 1 | 6% |
Other | 1 | 6% |
Unknown | 6 | 33% |
Readers by discipline | Count | As % |
---|---|---|
Biochemistry, Genetics and Molecular Biology | 4 | 22% |
Agricultural and Biological Sciences | 3 | 17% |
Pharmacology, Toxicology and Pharmaceutical Science | 2 | 11% |
Chemistry | 2 | 11% |
Medicine and Dentistry | 1 | 6% |
Other | 0 | 0% |
Unknown | 6 | 33% |