Schramm, Andreas


Publications
12

Indications for a genetic basis for big bacteria and description of the giant cable bacterium Candidatus Electrothrix gigas sp. nov

Citation
Geelhoed et al. (2023). Microbiology Spectrum 11 (5)
Names
Electrothrix gigas Electronema Electrothrix Electrothrix communis Ts Electrothrix arhusiensis
Abstract
ABSTRACT Bacterial cells can vary greatly in size, from a few hundred nanometers to hundreds of micrometers in diameter. Filamentous cable bacteria also display substantial size differences, with filament diameters ranging from 0.4 to 8 µm. We analyzed the genomes of cable bacterium filaments from 11 coastal environments of which the resulting 23 new genomes represent 10 novel species-level clades of Candidatus Electrothrix and two clades that putat

Inference and reconstruction of the heimdallarchaeial ancestry of eukaryotes

Citation
Eme et al. (2023). Nature 618 (7967)
Names
Asgardarchaeota
Abstract
AbstractIn the ongoing debates about eukaryogenesis—the series of evolutionary events leading to the emergence of the eukaryotic cell from prokaryotic ancestors—members of the Asgard archaea play a key part as the closest archaeal relatives of eukaryotes1. However, the nature and phylogenetic identity of the last common ancestor of Asgard archaea and eukaryotes remain unresolved2–4. Here we analyse distinct phylogenetic marker datasets of an expanded genomic sampling of Asgard archaea and evalua

Closed genomes uncover a saltwater species of Candidatus Electronema and shed new light on the boundary between marine and freshwater cable bacteria

Citation
Sereika et al. (2023). The ISME Journal 17 (4)
Names
Electronema halotolerans Electrothrix laxa Electronema Electronema aureum Ts Electrothrix Electrothrix gigas Electrothrix arhusiensis Electrothrix communis Ts
Abstract
AbstractCable bacteria of theDesulfobulbaceaefamily are centimeter-long filamentous bacteria, which are capable of conducting long-distance electron transfer. Currently, all cable bacteria are classified into two candidate genera:CandidatusElectronema, typically found in freshwater environments, andCandidatusElectrothrix, typically found in saltwater environments. This taxonomic framework is based on both 16S rRNA gene sequences and metagenome-assembled genome (MAG) phylogenies. However, most of

Persistent flocks of diverse motile bacteria in long-term incubations of electron-conducting cable bacteria, Candidatus Electronema aureum

Citation
Lustermans et al. (2023). Frontiers in Microbiology 14
Names
Electronema aureum Ts
Abstract
Cable bacteria are centimeters-long filamentous bacteria that oxidize sulfide in anoxic sediment layers and reduce oxygen at the oxic-anoxic interface, connecting these reactions via electron transport. The ubiquitous cable bacteria have a major impact on sediment geochemistry and microbial communities. This includes diverse bacteria swimming around cable bacteria as dense flocks in the anoxic zone, where the cable bacteria act as chemotactic attractant. We hypothesized that flocking only appear

Closed genomes uncover a saltwater species ofCandidatusElectronema and shed new light on the boundary between marine and freshwater cable bacteria

Citation
Sereika et al. (2022).
Names
Abstract
AbstractCable bacteria of theDesulfobulbaceaefamily are centimeter-long filamentous bacteria, which are capable of conducting long-distance electron transfer. Currently, all cable bacteria are classified into two candidate genera:CandidatusElectronema, typically found in freshwater environments, andCandidatusElectrothrix, typically found in saltwater environments. This taxonomic framework is based on both 16S rRNA gene sequences and metagenome-assembled genome (MAG) phylogenies. However, most of

On the evolution and physiology of cable bacteria

Citation
Kjeldsen et al. (2019). Proceedings of the National Academy of Sciences 116 (38)
Names
Electronema Electrothrix Electrothrix communis Ts Electrothrix arhusiensis Electronema aureum Ts
Abstract
Cable bacteria of the family Desulfobulbaceae form centimeter-long filaments comprising thousands of cells. They occur worldwide in the surface of aquatic sediments, where they connect sulfide oxidation with oxygen or nitrate reduction via long-distance electron transport. In the absence of pure cultures, we used single-filament genomics and metagenomics to retrieve draft genomes of 3 marine Candidatus Electrothrix and 1 freshwater Ca.

Asgard archaea illuminate the origin of eukaryotic cellular complexity

Citation
Zaremba-Niedzwiedzka et al. (2017). Nature 541 (7637)
Names
Asgardarchaeota “Odinarchaeota”
Abstract