Microbial Genomics and Phylogenetic Diversity

Microbial genomics has revolutionised our understanding of the vast and largely unexplored diversity of bacteria and archaea. By combining high-throughput sequencing with advanced computational methods, researchers now reconstruct genomes directly from environmental samples, revealing novel lineages and unprecedented functional potential. Phylogenetic diversity frameworks, which quantify evolutionary relationships among taxa, underpin efforts to map the tree of life and to interpret how genetic variation shapes ecological roles. These insights inform applications ranging from the discovery of new enzymes and natural products to the monitoring of microbial indicators in health, agriculture and environmental remediation. Moreover, the integration of metagenomics with single-cell and structural approaches illuminates the molecular basis of symbiosis, predation and metabolic cooperation, emphasising the interconnectedness of microbial communities across diverse habitats.

Research from Nature Portfolio

Recent studies have revealed a vast repertoire of novel gene families from uncultivated prokaryotes by analysing over 140,000 environmental genomes, significantly expanding the known set of orthologous groups and linking many families to clade-specific evolutionary traits. Another investigation into the candidate phylum Omnitrophota combined genome reconstruction with cell sorting and stable-isotope probing to show that these ultra-small bacteria maintain core biosynthetic and energy pathways and adopt host-dependent or predatory lifestyles across water, sediment and soil ecosystems. Furthermore, cryo-electron tomography of a co-culture system between DPANN archaea and their host has elucidated the structural basis of ectosymbiotic attachment and communication, revealing intercellular nanotube formations and host proteomic changes that underpin symbiotic interactions in complex microbial consortia.

Microbial Genomics and Phylogenetic Diversity publication trend

The graph below shows the total number of articles in microbial genomics and phylogenetic diversity across all publications each year (not limited to Nature Index journals).

Technical terms

Metagenomics: Culture-independent sequencing of DNA directly from environmental samples to reconstruct genomes and assess community functions.

Phylogenetic diversity: A measure of the evolutionary distances among organisms used to capture the breadth of genetic variation in a community.

Candidate Phyla Radiation (CPR): A large assemblage of mostly uncultivated bacteria characterised by reduced genomes and often symbiotic lifestyles.

Ectosymbiont: An organism that lives attached to the surface of another organism in a mutualistic or parasitic relationship.

Single-cell genomics: Techniques for isolating and sequencing the genome of an individual cell to study uncultured microbial lineages.

References

1. Functional and evolutionary significance of unknown genes from uncultivated taxa. Nature (2023).
2. Genetic manipulation of Patescibacteria provides mechanistic insights into microbial dark matter and the epibiotic lifestyle. Cell (2023).
3. Hyperactive nanobacteria with host-dependent traits pervade Omnitrophota. Nature Microbiology (2023).
4. Cell-to-cell interactions revealed by cryo-tomography of a DPANN co-culture system. Nature Communications (2024).
5. Global abundance patterns, diversity, and ecology of Patescibacteria in wastewater treatment plants. Microbiome (2024).
6. Small and mighty: adaptation of superphylum Patescibacteria to groundwater environment drives their genome simplicity. Microbiome (2020).