AI Article Synopsis
- Synthetic biologists aim to create genetic systems to better understand living organisms, focusing on the development of circuits that exhibit bistability.
- The engineers successfully designed a genetic toggle switch and a self-activation circuit, which were then combined to produce a circuit with tristability, allowing bacterial cells to differentiate into three distinct gene expression states.
- This innovative circuit's multistability can be adjusted with external inputs, providing a new framework for studying biological multistability in both synthetic and natural contexts.
Article Abstract
Synthetic biologists are dedicated to designing genetic systems from the bottom up to understand how living systems work. To date, a variety of genetic circuits exhibiting bistability have been designed, greatly expanding our understanding of the biological multistability in natural systems. However, the study of more complex forms of biological multistability using synthetic methods is still limited. In this report, we describe the engineering of a genetic circuit with regulatable multistability. A novel genetic toggle switch exhibiting inducible bistability and a self-activation circuit were individually designed and characterized, after which they were assembled to create a circuit that presents tristability. In bacteria, this synthetic circuit enables cells to differentiate spontaneously into three different states of gene expression. Moreover, the multistability of the circuit can be modulated by external inputs. This work provides a synthetic biology framework for the study of biological multistability and may help to understand natural multistability phenomena.
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| http://dx.doi.org/10.1039/c8ib00030a | DOI Listing |
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