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NMR analysis of nucleotide π-stacking in prebiotically relevant crowded environment
Niraja V Bapat1, Harshad Paithankar2, Jeetender Chugh3,4
1Department of Biology, Indian Institute of Science Education and Research (IISER), Dr. Homi Bhabha Road, Pashan, Pune, 411008, India.
Communications Chemistry
|January 27, 2023
Summary
Molecular crowding in the early RNA World enhances purine stacking, potentially limiting their availability for prebiotic reactions. This highlights the importance of studying crowding effects on origin-of-life chemistry.
Area of Science:
- Origin of Life Studies
- Astrobiology
- Biochemistry
Background:
- The prebiotic environment likely contained diverse molecules, leading to molecular crowding.
- Molecular crowding could significantly influence crucial prebiotic chemical reactions.
Purpose of the Study:
- To investigate the impact of molecular crowding on the stacking interactions of RNA monomers.
- To understand how crowding affects the availability of building blocks for early life.
Main Methods:
- Nuclear Magnetic Resonance (NMR) spectroscopy was employed.
- The stacking abilities of purine and pyrimidine ribonucleotides were analyzed under crowded conditions.
Main Results:
- Purines exhibit more efficient stacking than pyrimidines.
- Molecular crowding agents further enhance the stacking efficiency of purines.
- Enhanced purine stacking may sequester these monomers, reducing their availability for reactions.
Conclusions:
- Molecular crowding plays a critical role in modulating the reactivity of prebiotic molecules.
- Further research into molecular crowding is essential for understanding the abiotic-to-biotic transition.
- This study underscores the need to consider environmental factors in origin-of-life scenarios.
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