Shallow breathing: bacterial life at low O(2).
Shallow breathing: bacterial life at low O(2).
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DOI:
10.1038/nrmicro2970
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发表时间:
2013-03
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影响因子:
--
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中科院分区:
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Competition for molecular oxygen (O2) among respiratory microorganisms is intense because O2 is a potent electron acceptor. This competition leads to the formation of microoxic environments wherever microorganisms congregate in aquatic, terrestrial and host-associated communities. Bacteria can harvest O2 present at low, even nanomolar, concentrations using high-affinity terminal oxidases. Here, we report the results of surveys searching for high-affinity terminal oxidase genes in sequenced bacterial genomes and shotgun metagenomes. The results indicate that bacteria with the potential to respire under microoxic conditions are phylogenetically diverse and intriguingly widespread in nature. We explore the implications of these findings by highlighting the importance of microaerobic metabolism in host-associated bacteria related to health and disease.
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