"Quadrupling" the protein family space with global metagenomics.

Global metagenomics uncovers over 600,000 new protein families, doubling large families and quadrupling smaller ones, vastly expanding known molecular diversity.

• Why it matters: Understanding the full scope of protein families is crucial for insights into microbial adaptation and discovering novel biological functions, yet most remain uncharacterized.
• What they did: Analyzing 40,446 metagenomes, 9540 metatranscriptomes, and 167,415 reference genomes, researchers identified hundreds of thousands of previously unknown protein families, none matching existing databases, and integrated structural predictions with contextual analyses.
• The result: This expanded protein repertoire enhances our understanding of microbial biology and offers new tools for biotechnology, demonstrating the potential of global metagenomics to reveal hidden molecular diversity.