Sequence-defined vinyl sulfonamide click nucleic acids (VS-CNAs) and their assembly into dynamically responsive...

Area of Science:

• Biomaterials Science
• Synthetic Chemistry
• Molecular Biology

Background:

• Synthetic DNA analogues are crucial for applications like information storage and therapeutics.
• Scalability has been a significant challenge in the synthesis of these analogues.
• Click nucleic acids (CNAs) offer a promising alternative due to efficient reaction mechanisms.

Purpose of the Study:

• To develop a scalable synthesis for sequence-defined click nucleic acids (CNAs) using vinyl sulfonamide chemistry.
• To demonstrate the utility of CNAs in creating functional, responsive hydrogel materials.

Main Methods:

• Synthesis of vinyl sulfonamide click nucleic acids (VS-CNAs) utilizing the thiol-Michael click reaction.
• Solution-phase synthesis of sequence-defined CNAs, including the GATTACA sequence, using a polyethylene glycol (PEG) support.
• Assembly of CNA crosslinked hydrogels using multiarm PEG-CNAs.

Main Results:

• Achieved high yields in the synthesis of sequence-defined CNAs via a scalable solution-phase approach.
• Successfully synthesized the GATTACA CNA sequence using a PEG support.
• Developed CNA crosslinked hydrogels that exhibit dynamic responses to temperature, strain, and competitive sequences.

Conclusions:

• VS-CNAs provide a scalable and efficient platform for synthesizing DNA analogues.
• CNA-based hydrogels represent a new class of dynamic materials with tunable properties.
• This work opens avenues for advanced applications in synthetic biology, drug delivery, and nanotechnology.