RRC ID 55502
著者 Deng X, Dohmae N, Nealson KH, Hashimoto K, Okamoto A.
タイトル Multi-heme cytochromes provide a pathway for survival in energy-limited environments.
ジャーナル Sci Adv
Abstract Bacterial reduction of oxidized sulfur species (OSS) is critical for energy production in anaerobic marine subsurfaces. In organic-poor sediments, H2 has been considered as a major energy source for bacterial respiration. We identified outer-membrane cytochromes (OMCs) that are broadly conserved in sediment OSS-respiring bacteria and enable cells to directly use electrons from insoluble minerals via extracellular electron transport. Biochemical, transcriptomic, and microscopic analyses revealed that the identified OMCs were highly expressed on the surface of cells and nanofilaments in response to electron donor limitation. This electron uptake mechanism provides sufficient but minimum energy to drive the reduction of sulfate and other OSS. These results suggest a widespread mechanism for survival of OSS-respiring bacteria via electron uptake from solid minerals in energy-poor marine sediments.
巻・号 4(2)
ページ eaao5682
公開日 2018-2-1
DOI 10.1126/sciadv.aao5682
PII aao5682
PMID 29464208
PMC PMC5815863
MeSH Aerobiosis Cell Membrane / drug effects Cell Membrane / metabolism Cytochromes / metabolism* Desulfovibrio / drug effects Desulfovibrio / physiology* Electrochemistry Energy Metabolism* / drug effects Environment* Heme / metabolism* Lactic Acid / pharmacology Microbial Viability* / drug effects Nanowires / ultrastructure Phylogeny
IF 12.804
引用数 34
リソース情報
一般微生物 JCM 12295