Deep Sea Reveals Evolutionary Secrets

An international team of almost 60 researchers from the UK and China analyzed over 2100 deep-sea samples to create a genetic dataset containing more than 500 million unique genes. The study, published in Cell Host & Microbe, demonstrates the deep sea’s role as a significant “evolutionary engine” driving genetic diversity. Researchers linked genetic variation to protein structure, revealing that despite substantial genetic differences, deep-sea organisms often rely on stable protein designs to withstand extreme conditions.

The team focused on habitats including the Mariana Trench, hydrothermal vents, and methane seeps. They discovered rapidly evolving proteins involved in DNA repair, and a unique helicase variant that could improve nanopore DNA sequencing technology.

This research expands known marine gene diversity by over 50 percent and provides a framework for utilizing deep-sea resources for biotechnology and medicine. Researchers hope to further explore the “genomic dark matter” of the deep ocean and incentivize broader research into these extreme environments.