Cellular signaling circuits interfaced with synthetic, post-translational, negating Boolean logic devices.

Area of Science:

• Synthetic biology
• Biomolecular computing
• Cellular information processing

Background:

• Negating logic operations are crucial for both digital computers and cellular information processing.
• Adapting electronic circuit concepts to cellular signaling can enhance our understanding of biological systems.

Purpose of the Study:

• To develop synthetic protein-based logic gates capable of performing negating Boolean operations (NOT, NOR, NAND, N-IMPLY) within living cells.
• To integrate these synthetic gates with endogenous cellular signaling pathways to achieve a physiological output.
• To computationally analyze biological signaling pathways for parallels with electronic circuits.

Main Methods:

• Bottom-up approach: Designing and constructing protein-based devices for Boolean logic operations.
• Cellular implementation: Inducing precise activator localization within subcellular spaces to control gate function.
• Top-down approach: Computational screening of 108 signaling pathways to identify circuit commonalities.
• Integration: Networking synthetic gates to endogenous signaling circuits for physiological readouts.

Main Results:

• Successfully created functional protein-based NOT, NOR, NAND, and N-IMPLY logic gates operating in living cells.
• Demonstrated precise control over cellular localization of activator molecules within a minute.
• Networked synthetic logic gates to endogenous signaling pathways, achieving a physiological output.
• Identified commonalities and differences between biological signaling pathways and electronic circuits through computational analysis.

Conclusions:

• The developed synthetic logic gates provide a novel tool for manipulating cellular signaling with high precision.
• The combined synthetic and systems approaches lay the groundwork for deconstructing complex cell signaling networks.
• This research advances the field of biomolecular computing by enabling the construction of sophisticated biological circuits.