Cable bacteria metabolism

Edge evidence

• Cable bacteria metabolism occurs in multicellular filament biolink:occurs_in

  Cable bacteria metabolism is performed by long multicellular filaments.

  • DOI:10.1073/pnas.1800367115 centimeter-long, multicellular filamentous bacteria Supports multicellular filament organization.
• sulfidic sediment zone provides electron donor sulfide

  Deeper sulfidic sediment provides sulfide for oxidation.

  • DOI:10.3389/fmars.2017.00028 oxidize sulfide in deeper sediments Supports sulfide oxidation in deeper sediment.
• oxic sediment zone provides electron acceptor molecular oxygen

  The oxic sediment zone provides oxygen for electron acceptance.

  • DOI:10.3389/fmars.2017.00028 oxic zone Supports electron transfer from deeper sediments to oxic zones.
• conductive fiber network located in multicellular filament biolink:located_in

  Conductive fibers run along the cable bacteria filament.

  • DOI:10.1073/pnas.1800367115 conductive fibers Supports conductive filament structures.
• sulfide oxidized during electrogenic sulfur oxidation

  Sulfide oxidation supplies electrons to the cable.

  • DOI:10.3389/fmars.2017.00028 Electrogenic Sulfur Oxidation Supports sulfide oxidation as the anodic process.
• electrogenic sulfur oxidation produces sulfate METPO:2000202

  Sulfide oxidation can yield sulfate.

  • DOI:10.3389/fmars.2017.00028 sulfide Source supports electrogenic sulfide oxidation; sulfate is the oxidized sulfur end product in the modeled sulfur oxidation route.
• conductive fiber network mediates long-distance electron transport

  Conductive fibers mediate long-distance electron transport.

  • DOI:10.1073/pnas.1800367115 long-distance electron transport Supports electron transport over millimeter-to-centimeter distances.
• long-distance electron transport transfers electrons to molecular oxygen METPO:2007403

  Long-distance electron transport connects sulfide oxidation to oxygen reduction.

  • DOI:10.1073/pnas.1800367115 sulfide as an electron source at one end and oxygen as an electron acceptor at the other Supports redox-separated sulfide-to-oxygen electron flow.
• molecular oxygen reduced during electrogenic sulfur oxidation

  Oxygen reduction is the cathodic half reaction in many cable bacteria systems.

  • DOI:10.3389/fmars.2017.00028 reduction of oxygen Supports oxygen reduction coupled to sulfide oxidation.
• conductive fiber network part of cell envelope biolink:part_of

  Conductive fibers are embedded in and run along the cell envelope.

  • DOI:10.1186/s12864-024-10594-7 Fibers are "embedded in the cell envelope" and run along filament length.
• sulfur-ligated nickel cofactor component of conductive fiber network

  A sulfur-ligated nickel cofactor is a component of the conductive fibers.

  • DOI:10.1186/s12864-024-10594-7 Conductive fibers "harbour a novel nickel-containing cofactor"; Raman/extraction data show Ni-cofactor-associated modes.
• sulfur-ligated nickel cofactor mediates long-distance electron transport

  The nickel cofactor supports/mediates long-range electron transport.

  • DOI:10.3389/fmicb.2024.1208033 Authors link a "Ni-based, long-range electron transport pathway" to the cofactor; orientation-dependent Raman aligns cofactor with electron path.
• long-distance electron transport maintains cytochrome redox gradient

  An intact electrical connection along the filament maintains the cytochrome redox gradient.

  • DOI:10.1073/pnas.1800367115 A redox gradient along filaments immediately broke down upon removal of oxygen or laser cutting, showing dependence on intact long-distance transport.
• Dsr-Apr-Qmo-Sqr-Psr/Phs sulfur oxidation pathway supports electrogenic sulfur oxidation

  The Dsr-Apr-Qmo-Sqr-Psr/Phs pathway supports sulfide oxidation metabolism.

  • DOI:10.1186/s12864-024-10594-7 Comparative genomics predicts sulfur oxidation through a Dsr-Apr-Qmo-Sqr-Psr/Phs pathway with DsrMKJOPG across closed genomes.