Engineering a Synthesis-Friendly Constitutive Promoter for Mammalian Cell Expression
Chee Ka Candice Lam1, Kevin Truong1,2
1Institute of Biomedical Engineering, University of Toronto, 164 College Street, Toronto, Ontario M5S 3G9, Canada.
ACS Synthetic Biology
|September 15, 2020
Summary
Researchers developed a novel synthetic constitutive promoter (SFCp) for cost-effective gene synthesis in cell engineering. This promoter enables stable transgene expression and avoids genetic material loss in synthetic biology applications.
Area of Science:
- Synthetic Biology
- Molecular Biology
- Genetic Engineering
Background:
- Cell-based therapies necessitate stable transgene expression, often achieved via lentiviral integration.
- Standard and synthetic constitutive promoters present synthesis challenges due to repetitive sequences, hindering cost-effective production.
- Lack of easily synthesizable, low-cost constitutive promoters limits advancements in cell engineering and synthetic biology.
Purpose of the Study:
- To design and characterize a novel synthetic constitutive promoter (SFCp) that is gene synthesis-friendly and cost-effective.
- To demonstrate SFCp's ability to drive expression of therapeutic transgenes, including fluorescent proteins and functional synthetic proteins.
- To showcase SFCp's utility in preventing genetic material loss through homologous recombination in tandem constructs.
Main Methods:
- Design of a novel synthetic constitutive promoter (SFCp) engineered for ease of gene synthesis.
- Validation of SFCp's transcriptional activity by driving expression of fluorescent proteins with specific subcellular localizations.
- Assessment of SFCp's functional capacity by expressing synthetic proteins that modulate cellular responses (e.g., Ca2+ signaling, cell morphology).
Main Results:
- The synthetic constitutive promoter (SFCp) successfully drove the expression of fluorescent proteins to targeted subcellular locations.
- SFCp facilitated the expression of synthetic proteins, enabling rewiring of cellular responses to stimuli like Ca2+ changes and cell morphology.
- SFCp demonstrated utility in mitigating sequence homology issues, preventing potential genetic material loss in tandem gene constructs.
Conclusions:
- The developed synthetic constitutive promoter (SFCp) offers a cost-effective and gene synthesis-friendly solution for stable transgene expression.
- SFCp is a versatile tool for cell engineering, enabling precise control over protein localization and cellular function.
- SFCp contributes to the synthetic biology toolbox, advancing the development of cell-based therapies and engineered cellular systems.
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