Science

Simplified ancestral enzyme makes ATP without amino acid needed for its usual reaction

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 29/10/2026, 23:10:24 UTC.

Briefings

A newly identified ancestral enzyme enables ATP production without requiring an amino acid for its primary reaction, challenging current models of protein evolution. This discovery suggests early proteins utilized fewer amino acid types than modern ones, potentially explaining metabolic efficiency in ancient life forms. The finding is supported by biochemical analysis of the enzyme's structure and function, though the specific organism and timeline remain unconfirmed.

Key points

• Ancestral enzymes can produce ATP without an amino acid substrate for their main catalytic reaction.
• Early proteins likely evolved with fewer amino acid types compared to modern proteins.

Context

This research addresses how early life forms generated energy, suggesting metabolic pathways were more efficient than previously understood. It implies a shift in protein composition during evolution, possibly driven by limited genetic resources in ancient organisms.

Limitations

The study relies on limited biochemical evidence regarding the specific organism and timeframe of the ancestral enzyme's discovery. The exact evolutionary timeline and geographic origin remain unconfirmed.

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