Background Circadian rhythms, observed across all domains of life, enable organisms to
anticipate and prepare for diel changes in environmental conditions. In bacteria, a circadian …

We report on the genomic characterization of three novel classes in the phylum
Desulfobacterota. One class (proposed name Candidatus 'Anaeroferrophillalia') was …

Virophages are small dsDNA viruses that hijack the machinery of giant viruses during the co-
infection of a protist (ie, microeukaryotic) host and represent an exceptional case of …

Chlamydiae are highly successful strictly intracellular bacteria associated with diverse
eukaryotic hosts. Here we analyzed metagenome-assembled genomes of the “Genomes …

Background Cyanobacteria and eukaryotic phytoplankton produce long-chain alkanes and
generate around 100 times greater quantities of hydrocarbons in the ocean compared to …

Background Permanently stratified lakes contain diverse microbial communities that vary
with depth and so serve as useful models for studying the relationships between microbial …

Viruses are nonliving biological entities whose host range encompasses all known forms of
life. They are deceptively simple in description (a protein shell surrounding genetic material …

Anoxygenic photoautotrophic metabolism of green sulfur bacteria of the family
Chlorobiaceae played a significant role in establishing the Earth's biosphere. Two known …

Abstract Vitamin B1 (thiamin, B1) is an essential micronutrient for cells, yet intriguingly in
aquatic systems most bacterioplankton are unable to synthesize it de novo (auxotrophy) …

ABSTRACT The ice-free McMurdo Dry Valleys of Antarctica are dominated by nutrient-poor
mineral soil and rocky outcrops. The principal habitat for microorganisms is within rocks …