A model on the origin of RNA

Area of Science:

• Biophysics
• Polymer Chemistry
• RNA Biology

Background:

• The liquid-glass transition theory describes the transformation of liquids into amorphous solids.
• RNA polymerization involves forming a ribose-phosphate backbone through phosphodiester linkages.
• Understanding RNA's condensed state is crucial for its stability and function.

Purpose of the Study:

• To extend the liquid-glass transition theory to RNA polymerization.
• To elucidate the conditions necessary for RNA to form a glassy state.
• To analyze the role of phosphodiester linkages in RNA's condensed structure.

Main Methods:

• Theoretical extension of liquid-glass transition principles.
• Analysis of nucleotide-condensed states and RNA polymerization.
• Application of thermodynamic principles, including Gibbs free energy and Kauzmann entropy.

Main Results:

• RNA polymerization in a nucleotide-condensed state can be described by liquid-glass transition theory.
• The glassy state features a ribose-phosphate backbone formed by 2'-5' or 3'-5' phosphodiester linkages.
• Two key conditions for the glass transition in RNA were identified: existence of a supercooled state below hydrolysis temperature and sufficient Gibbs free energy to overcome the binding barrier.

Conclusions:

• The liquid-glass transition theory provides a framework for understanding RNA polymerization in condensed states.
• The formation of a stable glassy state in RNA is dependent on specific thermodynamic and kinetic conditions.
• This research offers insights into the physical chemistry governing RNA structure and stability.