The generality of transient compartmentalization and its associated error thresholds

Area of Science:

• Origin of life studies
• Prebiotic chemistry
• Theoretical biology

Background:

• Cell division is fundamental to life, but its evolutionary origins are debated.
• Transient compartmentalization is a proposed mechanism that may have preceded cell division in early life.
• Mutations and replication noise can threaten the stability of early self-replicating systems.

Purpose of the Study:

• To investigate the dynamics of transient compartmentalization in prebiotic scenarios.
• To analyze the impact of mutations and replication noise on compartment survival.
• To explore the conditions under which cooperation and complexity can emerge before cell division.

Main Methods:

• Utilized the theory of branching processes for analytical modeling.
• Studied systems with uncoupled autocatalytic reactions and RNA replicators.
• Introduced mutations to model functional replicators versus parasites in deterministic growth.

Main Results:

• Identified two replication regimes: diffusion-limited (high variability) and replication-limited (low variability).
• Demonstrated that transient compartmentalization allows parasite coexistence beyond the classical error threshold.
• Showed the phase boundary for coexistence depends on growth, inoculation size, and mutation rate.

Conclusions:

• Transient compartmentalization offers a viable pathway for early life development, even with genetic instability.
• Findings challenge the necessity of cell division for early evolutionary transitions.
• Suggests new perspectives on the emergence of cooperation, complex polymers, and cellular life.