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Oriented triplex DNA as a synthetic receptor for transmembrane signal transduction
Hui Chen1, Shaohong Zhou1, Kleins Ngocho1
1State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, People's Republic of China.
Nature Communications
|November 12, 2024
Summary
Scientists created an artificial signal transduction system using DNA receptors to mimic cell signaling. This synthetic biology approach enables signal transmission across membranes, opening doors for biosensing and drug delivery.
Area of Science:
- Synthetic biology
- Molecular biology
- Biochemistry
Background:
- Cellular signal transduction across membranes is crucial for cell function.
- Replicating these processes synthetically is a key goal in synthetic biology.
- Existing synthetic systems often lack the complexity and efficiency of natural pathways.
Purpose of the Study:
- To develop an artificial signal transduction system using synthetic receptors.
- To mimic the function of natural receptors like G protein-coupled receptors (GPCRs).
- To enable signal transmission and amplification across lipid bilayer membranes.
Main Methods:
- Utilized cholesterol-tagged triplex DNA (TD) as synthetic receptors.
- Employed an auxiliary sequence for controlled outward orientation of TD on membranes.
- Leveraged H+-mediated TD conformational transitions (duplex to triplex) for signal transduction.
- Investigated signal transduction mechanisms including FRET, photocleavage, and catalytic amplification within vesicles.
Main Results:
- Demonstrated effective transmembrane signal transduction triggered by H+ stimuli.
- Showcased signal amplification and logic gate modulation within vesicles.
- Achieved controlled translocation of DNA strands across membrane leaflets.
- Verified the mimicry of natural GPCR functional dynamics by TD-based receptors.
Conclusions:
- The developed TD-based system effectively mimics natural signal transduction pathways.
- This synthetic system provides a foundation for advanced biosensing and cell signaling modulation.
- Potential applications include targeted drug delivery systems and sophisticated biosensors.
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