Synthetic logic circuits using RNA aptamer against T7 RNA polymerase

Area of Science:

• Synthetic biology
• Molecular engineering
• RNA therapeutics

Background:

• Recent advances in nucleic acid engineering have introduced novel RNA-based regulatory components for synthetic gene circuits.
• These components expand the available toolset for engineering organisms with designed biological functions.

Purpose of the Study:

• To design and validate genetic circuits utilizing an RNA aptamer that inhibits T7 RNA polymerase activity.
• To assess the feasibility and functionality of this RNA aptamer in both cell-free and cellular systems for synthetic biology applications.

Main Methods:

• Designed genetic circuits incorporating an RNA aptamer known to bind and inhibit T7 RNA polymerase.
• Validated aptamer utility in vitro with programmable synthetic transcription networks.
• Tested aptamer functionality in a cell-free expression system.
• Expressed the aptamer in E. coli to evaluate control over T7 RNA polymerase-driven GFP expression.

Main Results:

• Demonstrated the utility of the RNA aptamer in vitro with synthetic transcription networks.
• Verified aptamer functionality in a cell-free expression system, confirming its ability to inhibit T7 RNA polymerase.
• Showcased successful control over GFP expression in E. coli using the aptamer, indicating its in vivo regulatory potential.

Conclusions:

• The T7 RNA polymerase aptamer functions effectively as a regulator in both cell-free and cellular environments.
• This RNA aptamer serves as a valuable building block for constructing logic circuits and transcriptional cascades in synthetic biology.
• The findings highlight the potential of T7 RNA polymerase aptamers for applications in synthetic biological circuits and metabolic engineering.