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Light-Controlled Fermentations for Microbial Chemical and Protein Production
Published on: March 22, 2022
Aequorin-expressing yeast emits light under electric control.
Cristina Vilanova1, Angeles Hueso, Carles Palanca
1Institut Cavanilles de Biodiversitat i Biologia Evolutiva, Universitat de València, Postal Code 22085, 46071 València, Spain.
Journal of Biotechnology
|February 5, 2011
Summary
Researchers electrically stimulated aequorin, a jellyfish luminescent protein, in yeast. This direct electrical control of cellular light emission opens new avenues in synthetic biology and cybernetics.
Area of Science:
- Biotechnology
- Synthetic Biology
- Biophysics
Background:
- Aequorin is a photoprotein from jellyfish that emits light in response to calcium ions.
- Controlling biological systems with external stimuli is a key goal in synthetic biology.
- Transgenic yeast strains offer a versatile platform for expressing heterologous proteins.
Purpose of the Study:
- To investigate the direct electrical stimulation of aequorin in a transgenic yeast system.
- To explore the potential for electrical control over cellular light emission.
- To establish a link between electrical signals and biological responses in engineered cells.
Main Methods:
- Expression of jellyfish aequorin in a genetically modified Saccharomyces cerevisiae strain.
- Application of direct external electrical stimulation using electrodes and a power generator.
- Monitoring of light emission (luminescence) in response to electrical pulses.
Main Results:
- Low-voltage electrical pulses (1.5 V) successfully triggered rapid light emission from aequorin.
- Periodic electrical stimulation resulted in serial light pulses, indicating system recovery.
- A short refractory period was observed between light pulses, suggesting a regulated response.
Conclusions:
- Direct electrical stimulation can effectively control the light-emitting properties of aequorin in yeast.
- This study demonstrates a novel interface between electrical engineering and synthetic biology.
- The findings suggest potential for electrical control of complex cellular behaviors in engineered organisms.
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