Working definition
Synthetic biological circuits combine promoters, regulators, RNAs, proteins, signaling pathways, or recombination systems to implement declared input-output behavior in cells. Logical diagrams are abstractions over stochastic, context-dependent molecular kinetics. Performance must include burden, toxicity, mutation, crosstalk, delivery, growth, environmental sensitivity, and population heterogeneity.
Mechanism
- Sense a molecular or environmental input.
- Transform it through engineered regulatory interactions.
- Express, store, or actuate a bounded output.
Measurements
- Dose-response and dynamic range
- Error, burden, and stability
- Single-cell and population variability
Reproducibility controls
- Version hardware, software, firmware, and analysis code.
- Declare dataset, preprocessing, random seeds, and measurement boundary.
- Report repeated runs, variation, exclusions, and failed trials.
Limits and failure modes
- Boolean labels simplify analog biology.
- Circuit behavior may not transfer across contexts.
Mathematical connection
Formal structure without substrate erasure
Related mathematical concepts are named, but no direct bridge is asserted in this release.
Technical and governance sources
- [1]Programmable single-cell mammalian biocomputers · Nature
Establishes: A primary demonstration of engineered transcriptional and translational circuits implementing selected logical and arithmetic functions in mammalian cells.
Boundary: Programmed cellular logic is constrained by biological context, kinetics, noise, burden, delivery, and assay design. It is not interchangeable with electronic logic or evidence of an unconstrained general-purpose computer.