De novo emergence of metabolically active protocells

TL;DR

This study demonstrates that simple chemical mixtures can spontaneously form protocell-like structures capable of metabolism, growth, and self-perpetuation, providing insights into the origins of life.

Contribution

It reveals a new, experimentally validated pathway for protocell emergence from disordered chemical mixtures under natural conditions.

Findings

Protocell-like compartments form spontaneously in simple chemical mixtures.

These structures support organic synthesis and growth.

Protocell features resemble natural oceanic microspheres.

Abstract

A continuous route from a disordered soup of simple chemical feedstocks to a functional protocell -- a compartment that metabolizes, grows, and propagates -- remains elusive. Here, we show that a homogeneous aqueous chemical mixture containing phosphorus, iron, molybdenum salts and formaldehyde spontaneously self-organizes into compartments that couple robust non-equilibrium chemical dynamics to their own growth. These structures mature to a sustained, dissipative steady state and support an organic synthetic engine, producing diverse molecular species including many core biomolecular classes. Internal spherules that are themselves growth-competent are produced within the protocells, establishing a rudimentary mode of self-perpetuation. The chemical dynamics we observe in controlled laboratory conditions also occur in reaction mixtures exposed to natural day-night cycles. Strikingly, the morphology and chemical composition of the protocells in our experiments closely resemble molybdenum-rich microspheres recently discovered in current oceanic environments. Our work establishes a robust, testable route to de novo protocell formation. The emergence of life-like spatiotemporal organization and chemical dynamics from minimal initial conditions is more facile than previously thought and could be a recurring natural phenomenon.