Dynamic lipid aptamers: non-polymeric chemical path to early life

Area of Science:

• Origin of life studies
• Biochemistry
• Astrobiology

Background:

• The emergence of life is traditionally attributed to complex biopolymers such as RNA and proteins.
• The spontaneous formation of these molecules in early Earth conditions is considered improbable.
• The
• Lipid-First
• hypothesis proposes that self-replicating lipid assemblies could precede biopolymers.

Purpose of the Study:

• To investigate the capacity of lipid assemblies for stereospecific molecular interactions, a crucial characteristic for life processes.
• To provide experimental evidence supporting the
• Lipid-First
• model for the origin of life.

Main Methods:

• Review of existing experimental data on lipid aggregate behavior.
• Analysis of the dynamic surface configurations of lipid assemblies.
• Evaluation of evidence for stereospecific molecular recognition in lipid systems.

Main Results:

• Lipid assemblies demonstrate spontaneous emergence, growth, fission, and autocatalytic self-copying in heterogeneous environments.
• Growing experimental evidence indicates that lipid aggregates possess dynamic surfaces capable of stereospecific molecular recognition.
• These properties challenge the necessity of pre-existing biopolymers for the initial stages of life.

Conclusions:

• Lipid assemblies exhibit key life-like properties, including stereospecific recognition, suggesting a viable alternative to the
• RNA-world
• or
• protein-world
• hypotheses.
• Lipids may have played a fundamental role in seeding the origin of life.
• Further research into lipid self-organization is crucial for understanding abiogenesis.