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Cell-surface-localized ATP detection with immobilized firefly luciferase
Makiko Nakamura1, Masayasu Mie, Hisakage Funabashi
1Department of Biological Information, Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8501, Japan.
Analytical Biochemistry
|March 28, 2006
Summary
This study introduces a novel assay for detecting adenosine triphosphate (ATP) efflux from cell surfaces. The new method accurately measures dynamic ATP release near the cell membrane, overcoming limitations of previous bulk solution assays.
Area of Science:
- Biochemistry
- Cell Biology
- Assay Development
Background:
- Traditional firefly luciferase assays detect extracellular adenosine triphosphate (ATP) release.
- These bulk assays lack spatial resolution, failing to accurately quantify dynamic ATP flux at the cell membrane.
Purpose of the Study:
- To develop a sensitive and accurate assay for detecting cell surface ATP efflux.
- To overcome the limitations of conventional bulk solution ATP detection methods.
Main Methods:
- Construction and immobilization of biotinylated luciferase fusion proteins onto the cell surface.
- Utilizing streptavidin-biotin binding for strong and stable enzyme localization.
- Measuring ATP release in close proximity to the cell membrane.
Main Results:
- Demonstrated successful application of the cell-surface immobilized assay.
- Achieved accurate detection of dynamic ATP efflux near the cell membrane.
- Overcame limitations of traditional bulk solution assays.
Conclusions:
- The developed assay provides a more accurate method for studying cell surface ATP dynamics.
- This technique enhances our understanding of ATP signaling and release mechanisms at the cellular level.