RNA Order Regulates Its Interactions with Zwitterionic Lipid Bilayers.

Area of Science:

• Biophysics
• Molecular Biology
• Biochemistry

Background:

• RNA-lipid interactions are vital for medicine and biotechnology.
• The molecular basis for RNA's preferential binding to lipid bilayers is not understood.

Purpose of the Study:

• To investigate RNA-zwitterionic lipid interactions at the atomic level using molecular dynamics simulations.
• To elucidate the molecular determinants governing RNA-membrane binding.

Main Methods:

• Atomistic molecular dynamics simulations.
• Analysis of RNA-lipid interactions and membrane phase behavior.

Main Results:

• Simulations reproduced experimental findings: Guanine-rich, short-chain RNAs show higher affinity for gel-phase membranes.
• RNA demonstrates a preference for gel-phase over fluid lipid bilayers.
• RNA's structural order was identified as a critical factor in its interaction with zwitterionic phospholipids.

Conclusions:

• RNA order is a key molecular determinant of RNA-zwitterionic phospholipid interactions.
• These findings provide atomic-level insights to advance RNA-lipid assembly research.
• This knowledge can accelerate the design of lipid-based nanocarriers for RNA delivery.