Metals Are Integral to Life as We Know It

Area of Science:

• * Origin of Life research
• * Astrobiology
• * Geochemistry

Background:

• * Central dogma (nucleic acids and peptides) is the focus of origin of life studies.
• * Inorganic cellular components, essential for biological polymer function, are understudied.
• * Earth's metal abundance necessitates investigating the role of metal ions in life's emergence and evolution.

Purpose of the Study:

• * To highlight the critical role of metal ions in the origin and evolution of life.
• * To analyze how metal availability and reactivity influenced early cellular composition.
• * To re-evaluate geological and bioinformatic data in the context of diverse environmental conditions, not just average oceanic ones.

Main Methods:

• * Review of geological data on elemental accessibility over Earth's history.
• * Bioinformatic analysis of metal ion presence and influence in biological systems.
• * Consideration of metal ion solubility and reactivity in prebiotic environments.

Main Results:

• * Metal ion accessibility has significantly changed throughout Earth's history.
• * Metal presence, solubility, and reactivity were key factors in determining the composition of early cells.
• * Life as we know it is fundamentally dependent on metals, with historical metal-dependent events imprinted in cellular chemistry.

Conclusions:

• * Metal ions are indispensable components for life's origin and function.
• * Understanding past and present metal ion availability is crucial for origin of life research.
• * The evolution of cellular life is inextricably linked to the geochemical history of metals on Earth.