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Repeated Reuse of Deoxyribozyme-Based Logic Gates
Bradley I Harding1, Nina M Pollak1,2, Darko Stefanovic3,4
1Genecology Research Centre, School of Science and Engineering , University of the Sunshine Coast , Sippy Downs , QLD 4556 , Australia.
Nano Letters
|October 17, 2019
Summary
Researchers developed a novel DNAzyme reuse system for biocomputing. This system enables cyclic activation and deactivation of DNAzyme logic gates, paving the way for reusable biological devices.
Area of Science:
- Biotechnology
- Molecular Biology
- Synthetic Biology
Background:
- Deoxyribozymes (DNAzymes) show potential for biocomputing and information processing in biological devices.
- A key limitation for advanced applications is the lack of DNAzyme reuse capability.
Purpose of the Study:
- To design and demonstrate an oligonucleotide-based system for the cyclic, controlled reuse of DNAzyme logic gates.
- To enable controllable activation and deactivation of DNAzyme activity for efficient biocomputing.
Main Methods:
- Designed a system using complementary oligonucleotides for input removal via toe-hold mediated binding.
- Incorporated quencher-labeled oligonucleotides to diminish output signal by targeting fluorophore-bound substrates.
- Demonstrated toggling of DNAzyme activity through multiple cycles.
Main Results:
- Achieved DNAzyme activity recovery to 90-125% of original levels after deactivation.
- Successfully demonstrated multiple cycles of DNAzyme activity toggling with controlled timing.
- Showcased active removal and regeneration of fluorescent output signals.
Conclusions:
- The developed system enables reusable DNAzyme logic gates, a critical step for advanced biodevices.
- This DNAzyme reuse strategy enhances efficiency by reducing oligonucleotide redundancy.
- The findings are crucial for the future development of controllable, reusable biodevices based on logical operations.
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