Recognition-Encoded Molecules: A Minimal Self-Replicator.

Area of Science:

• Synthetic chemistry
• Origin of life studies
• Molecular self-replication

Background:

• Nucleic acids' duplex structure is crucial for information replication and life's origins.
• Early self-replicators included oligonucleotides, peptides, and synthetic molecules.
• Investigating synthetic molecules for self-replication is key to understanding life's beginnings.

Purpose of the Study:

• To explore the self-replication potential of synthetic duplex-forming oligoanilines.
• To investigate self-replication using oligoanilines with specific H-bond base pairs.
• To determine if imine-formed monomers can self-replicate.

Main Methods:

• Development of oligoanilines with 2-trifluoromethylphenol-phosphine oxide H-bond base pairs.
• Investigation of imine formation between complementary aniline and aldehyde monomers.
• Control experiments using methylated donors and competitive inhibitors.
• Analysis of reduced aniline dimer for templated synthesis.

Main Results:

• Evidence supporting self-replication despite a non-sigmoidal kinetic profile.
• Demonstration of templated synthesis with parabolic growth kinetics.
• Confirmation of sequence-selective duplex formation.
• Observation of emergent catalytic function.

Conclusions:

• Synthetic oligoanilines exhibit self-replication behavior.
• These molecules can parallel the unique properties of nucleic acids.
• Recognition-encoded synthetic molecules offer a pathway to understanding early life mechanisms.