Related Experiment Videos
Differences in stability of recombinant apoaequorin within subcellular compartments
M N Badminton1, G B Sala-Newby, J M Kendall
1Department of Medical Biochemistry, University of Wales College of Medicine, Cardiff, U.K.
Biochemical and Biophysical Research Communications
|December 26, 1995
Summary
Recombinant apoaequorin, a calcium indicator, is unstable in cells. Its stability increases when targeted to organelles or reconstituted with coelenterazine, making it a useful gene expression reporter.
Area of Science:
- Biochemistry
- Molecular Biology
- Cell Biology
Background:
- Recombinant aequorin is a commonly used intracellular calcium indicator in live cells.
- The stability of recombinant apoaequorin in the cytosol is a critical factor for its reliable application.
Purpose of the Study:
- To investigate the stability of recombinant apoaequorin within live cells.
- To explore methods for enhancing apoaequorin stability for improved cellular applications.
Main Methods:
- Assessing the half-life of recombinant apoaequorin in the cytosol.
- Evaluating apoaequorin stability when targeted to subcellular organelles.
- Determining the effect of coelenterazine reconstitution on apoaequorin half-life.
Main Results:
- Recombinant apoaequorin exhibited limited stability in the cytosol with a half-life of approximately 20 minutes.
- Targeting apoaequorin to subcellular organelles significantly increased its stability.
- Reconstitution of apoaequorin with coelenterazine substantially enhanced its half-life in the cytosol.
Conclusions:
- The inherent instability of apoaequorin in the cytosol can be overcome by organelle targeting or coelenterazine reconstitution.
- The variable stability of aequorin, influenced by its cellular environment and reconstitution status, suggests its potential as a sensitive reporter for gene expression.