Phase Separation of Nucleic Acids: Mechanisms, Properties, and Applications.

Area of Science:

• Biochemistry
• Materials Science
• Origin of Life Studies

Background:

• Nucleic acids (DNA and RNA) are vital macromolecules for genetic information and gene regulation.
• Synthetic nucleic acids are programmable building blocks for nanotechnology via base-pairing.
• Long-chain nucleic acids exhibit temperature-induced phase separation, forming condensates.

Purpose of the Study:

• To review the mechanistic understanding of temperature-induced phase separation in synthetic long-chain DNA and RNA.
• To explore strategies for controlling the properties of DNA condensates.
• To highlight applications of nucleic acid condensates.

Main Methods:

• Focus on in vitro studies of synthetic long-chain DNA and RNA phase separation.
• Exclusion of complex coacervation with proteins and other polymers.
• Analysis of temperature-induced transitions and condensate formation.

Main Results:

• Nucleic acid phase separation is driven by their polymeric nature, distinct from base-pairing.
• This phenomenon enables rapid formation of micro-sized, nucleic acid-rich condensates.
• Strategies exist to tune the physical and chemical characteristics of these condensates.

Conclusions:

• Nucleic acid phase separation expands DNA/RNA nanotechnology beyond base-pairing interactions.
• It offers a novel perspective on compartmentalization in the prebiotic RNA world.
• Developing nucleic acid condensates holds promise for diverse applications.