A visible multi-digit DNA keypad lock based on split G-quadruplex DNAzyme and silver microspheres

Area of Science:

• Biotechnology
• Molecular Engineering
• Nanotechnology

Background:

• DNA-based molecular devices offer unique properties for information storage and security.
• G-quadruplex DNAzymes present catalytic activity and structural versatility for molecular recognition.
• Silver microspheres can be utilized for signal amplification and visual detection in biosensing.

Purpose of the Study:

• To fabricate a novel, visible, multi-digit DNA keypad lock system.
• To demonstrate the system's ability to recognize inputs and provide a clear output.
• To assess the scalability and flexibility of the developed molecular platform.

Main Methods:

• Construction of a DNA keypad lock utilizing split G-quadruplex DNAzyme components.
• Integration of silver microspheres for visual readout of the keypad lock's state.
• Testing the system's response to varying input sequences and adjusting the number of input digits.

Main Results:

• Successful fabrication of a visible multi-digit DNA keypad lock.
• The system provides easily recognizable outputs for naked-eye observation.
• The number of input digits for the keypad lock can be flexibly adjusted.
• The molecular platform demonstrated excellent scalability and flexibility.

Conclusions:

• A novel DNA keypad lock system based on split G-quadruplex DNAzyme and silver microspheres has been successfully developed.
• The system offers a user-friendly, visually discernible output and adaptable input capacity.
• This molecular platform exhibits significant potential for scalable and flexible applications in DNA-based security and sensing.