l-DNA Duplex Formation as a Bioorthogonal Information Channel in Nucleic Acid-Based Surface Patterning

Area of Science:

• Biotechnology
• Materials Science
• Synthetic Biology

Background:

• Photolithographic in situ synthesis allows high oligonucleotide density and complex surface patterning for information encoding.
• Cross-hybridization in DNA microarrays limits sequence space and information density.

Purpose of the Study:

• To introduce an independent information channel in surface patterning using in situ l-DNA synthesis.
• To overcome limitations of cross-hybridization in DNA-based information encoding.

Main Methods:

• Utilizing the bioorthogonality of mirror-image DNA (l-DNA) duplex formation.
• Employing chimeric l-/d-DNA microarrays to prevent cross-hybridization.
• Demonstrating enzymatic orthogonality for nuclease-proof DNA signatures.

Main Results:

• Achieved prevention of cross-hybridization on chimeric l-/d-DNA microarrays.
• Established an independent information channel through l-DNA synthesis.
• Created informative surface patterns including QR codes, authenticity watermarks, and concealed messages.

Conclusions:

• In situ l-DNA synthesis offers a novel, bioorthogonal approach to surface patterning.
• This method significantly enhances information density and security in DNA-based microarrays.
• Applications include advanced data encoding, anti-counterfeiting measures, and secure information display.