{"id":14482,"date":"2020-02-03T14:40:39","date_gmt":"2020-02-03T22:40:39","guid":{"rendered":"https:\/\/www.darkenergybiosphere.org\/?post_type=publication&#038;p=14482"},"modified":"2020-02-18T12:32:10","modified_gmt":"2020-02-18T20:32:10","slug":"evidence-for-auxiliary-anaerobic-metabolism-in-obligately-aerobic-zetaproteobacteria","status":"publish","type":"publication","link":"https:\/\/www.darkenergybiosphere.org\/publication\/evidence-for-auxiliary-anaerobic-metabolism-in-obligately-aerobic-zetaproteobacteria\/","title":{"rendered":"Evidence for auxiliary anaerobic metabolism in obligately aerobic <em>Zetaproteobacteria<\/em>"},"content":{"rendered":"<p><i>Zetaproteobacteria<\/i>\u00a0are obligate chemolithoautotrophs that oxidize Fe(II) as an electron and energy source, and play significant roles in nutrient cycling and primary production in the marine biosphere.\u00a0<i>Zetaproteobacteria<\/i>\u00a0thrive under microoxic conditions near oxic\u2013anoxic interfaces, where they catalyze Fe(II) oxidation faster than the abiotic reaction with oxygen. Neutrophilic Fe(II) oxidizing bacteria produce copious amounts of insoluble iron oxyhydroxides as a by-product of their metabolism. Oxygen consumption by aerobic respiration and formation of iron oxyhydroxides at oxic\u2013anoxic interfaces can result in periods of oxygen limitation for bacterial cells. Under laboratory conditions, all\u00a0<i>Zetaproteobacteria<\/i>\u00a0isolates have been shown to strictly require oxygen as an electron acceptor for growth, and anaerobic metabolism has not been observed. However, genomic analyses indicate a range of potential anaerobic pathways present in\u00a0<i>Zetaproteobacteria<\/i>. Heterologous expression of proteins from\u00a0<i>Mariprofundus ferrooxydans<\/i>\u00a0PV-1, including pyruvate formate lyase and acetate kinase, further support a capacity for anaerobic metabolism. Here we define auxiliary anaerobic metabolism as a mechanism to provide maintenance energy to cells and suggest that it provides a survival advantage to\u00a0<i>Zetaproteobacteria<\/i>\u00a0in environments with fluctuating oxygen availability.<\/p>\n","protected":false},"template":"","tags":[],"publication_type":[19],"_links":{"self":[{"href":"https:\/\/www.darkenergybiosphere.org\/wp-json\/wp\/v2\/publication\/14482"}],"collection":[{"href":"https:\/\/www.darkenergybiosphere.org\/wp-json\/wp\/v2\/publication"}],"about":[{"href":"https:\/\/www.darkenergybiosphere.org\/wp-json\/wp\/v2\/types\/publication"}],"wp:attachment":[{"href":"https:\/\/www.darkenergybiosphere.org\/wp-json\/wp\/v2\/media?parent=14482"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.darkenergybiosphere.org\/wp-json\/wp\/v2\/tags?post=14482"},{"taxonomy":"publication_type","embeddable":true,"href":"https:\/\/www.darkenergybiosphere.org\/wp-json\/wp\/v2\/publication_type?post=14482"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}