Orthogonal Light-Activated DNA for Patterned Biocomputing within Synthetic Cells.

Area of Science:

• Synthetic Biology
• Biotechnology
• Molecular Biology

Background:

• Cell-free gene expression is crucial for studying biological systems and has biotechnological potential.
• Precise control over DNA templates in cell-free systems is needed for complex pathways and synthetic cells.
• Remote, non-damaging stimuli like visible light offer advanced control methods.

Purpose of the Study:

• To synthesize blue light-activatable DNA parts for regulating cell-free RNA and protein synthesis.
• To achieve orthogonal control of gene expression using blue light independently of ultraviolet (UV) light.
• To create a dual-wavelength light-controlled cell-free AND-gate for precise spatiotemporal regulation.

Main Methods:

• Synthesis of blue light-activatable DNA constructs.
• Testing orthogonality with previously developed UV light-activated DNA.
• Construction and testing of a cell-free AND-gate logic circuit.
• Encapsulation of orthogonal DNA parts into synthetic cells.
• Application of overlapping blue and UV light patterns for spatiotemporal control.

Main Results:

• Successfully synthesized blue light-activatable DNA parts that regulate cell-free expression.
• Demonstrated orthogonal initiation of gene expression between blue and UV light-activated DNA.
• Engineered a dual-wavelength light-controlled cell-free AND-gate.
• Achieved precise spatiotemporal control over the AND-gate within synthetic cells using overlapping light patterns.

Conclusions:

• Developed novel blue and UV orthogonal light-activatable DNA systems.
• These systems enable precise spatiotemporal control of cell-free gene expression.
• Opens new possibilities for advanced control in synthetic biology, cell-free systems, and medicine.