Electrogenic sulfur oxidation by cable bacteria in two seasonally hypoxic coastal systems

Burdorf, Laurine D.W.; Cook, Perran L.M.; Robertson, Elizabeth K.; Tramper, Anton; Hidalgo-Martinez, Silvia; Vasquez-Cardenas, Diana; Malkin, Sairah Y.; Meysman, Filip J.R.

doi:10.1016/j.ecss.2024.108615

Cited by 3 publications

(1 citation statement)

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“…In addition to the SOB mentioned above, a novel multicellular filamentous bacterium called cable bacteria was discovered, which can oxidize sulfide via LDET [23,80]. Cable bacteria are found worldwide in marine and freshwater sediments [81][82][83][84][85][86]. Based on a 16S rRNA gene sequence phylogeny, cable bacteria belong to the deltaproteobacterial family Desulfobulbaceae, including the two genera Candidatus Electrothrix and Candidatus Electronema and nine described candidate species [23,87].…”

Section: Electron Transfer In Microbial Sulfur Oxidationmentioning

confidence: 99%

Electron Transfer in the Biogeochemical Sulfur Cycle

Zhuang,

Wang,

2024

Life

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Microorganisms are key players in the global biogeochemical sulfur cycle. Among them, some have garnered particular attention due to their electrical activity and ability to perform extracellular electron transfer. A growing body of research has highlighted their extensive phylogenetic and metabolic diversity, revealing their crucial roles in ecological processes. In this review, we delve into the electron transfer process between sulfate-reducing bacteria and anaerobic alkane-oxidizing archaea, which facilitates growth within syntrophic communities. Furthermore, we review the phenomenon of long-distance electron transfer and potential extracellular electron transfer in multicellular filamentous sulfur-oxidizing bacteria. These bacteria, with their vast application prospects and ecological significance, play a pivotal role in various ecological processes. Subsequently, we discuss the important role of the pili/cytochrome for electron transfer and presented cutting-edge approaches for exploring and studying electroactive microorganisms. This review provides a comprehensive overview of electroactive microorganisms participating in the biogeochemical sulfur cycle. By examining their electron transfer mechanisms, and the potential ecological and applied implications, we offer novel insights into microbial sulfur metabolism, thereby advancing applications in the development of sustainable bioelectronics materials and bioremediation technologies.

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Section: Electron Transfer In Microbial Sulfur Oxidationmentioning

confidence: 99%

Electron Transfer in the Biogeochemical Sulfur Cycle

Zhuang,

Wang,

2024

Life

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Cable bacteria: Living electrical conduits for biogeochemical cycling and water environment restoration

Xiong,

Li,

Zhang

2024

Water Research

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On the diversity, phylogeny and biogeography of cable bacteria

Ley,

Geelhoed,

Vasquez-Cardenas

et al. 2024

Front. Microbiol.

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Cable bacteria have acquired a unique metabolism, which induces long-distance electron transport along their centimeter-long multicellular filaments. At present, cable bacteria are thought to form a monophyletic clade with two described genera. However, their diversity has not been systematically investigated. To investigate the phylogenetic relationships within the cable bacteria clade, 16S rRNA gene sequences were compiled from literature and public databases (SILVA 138 SSU and NCBI GenBank). These were complemented with novel sequences obtained from natural sediment enrichments across a wide range of salinities (2–34). To enable taxonomic resolution at the species level, we designed a procedure to attain full-length 16S rRNA gene sequences from individual cable bacterium filaments using an optimized nested PCR protocol and Sanger sequencing. The final database contained 1,876 long 16S rRNA gene sequences (≥800 bp) originating from 92 aquatic locations, ranging from polar to tropical regions and from intertidal to deep sea sediments. The resulting phylogenetic tree reveals 90 potential species-level clades (based on a delineation value of 98.7% 16S rRNA gene sequence identity) that reside within six genus-level clusters. Hence, the diversity of cable bacteria appears to be substantially larger than the two genera and 13 species that have been officially named up to now. Particularly brackish environments with strong salinity fluctuations, as well as sediments with low free sulfide concentrations and deep sea sediments harbor a large pool of novel and undescribed cable bacteria taxa.

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Electrogenic sulfur oxidation by cable bacteria in two seasonally hypoxic coastal systems

Cited by 3 publications

References 61 publications

Electron Transfer in the Biogeochemical Sulfur Cycle

Electron Transfer in the Biogeochemical Sulfur Cycle

Cable bacteria: Living electrical conduits for biogeochemical cycling and water environment restoration

On the diversity, phylogeny and biogeography of cable bacteria

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