Journal
GENOMICS
Volume 112, Issue 2, Pages 2080-2091Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ygeno.2019.12.002
Keywords
Celeribacter manganoxidans; Comparative genomics; Metabolic analysis; Manganese-oxidation; Environmental adaption
Funding
- Creative Team Project of the Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology [LMEES-CTSP-2018-2]
- Fundamental Research Funds for the Central Universities [201762017]
- National Natural Science Foundation of China [91751202, 41730530]
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Manganese (Mn) nodule is one of the ubiquitous polymetallic concretions and mainly consists of Mn - Fe oxihydroxide precipitations. A primary oxidation of Mn(II) to MnO2, in which microorganisms may play important roles, is followed by agglomeration of MnO2 into nodules. Celeribater manganoxidans DY25(T), belonging to family Rhodobacteraceae, has ability to catalyze the formation of MnO2 [1]. The concentration of MnO2 formed by harvested cells reached 7.08 mu M after suspended in 10 mM HEPES (pH 7.5). Genomic and physiological characteristics of strain DY25(T) provided a better understanding of its Mn-oxidizing mechanism. Fifteen genes (including four multicopper oxidases) may be involved in Mn(II)-oxidation, whereas only three of them can promote this process. Sulfur-oxidizing activity was detected, which may be associated with manganese oxidation. Genes involved in import and export of primary elemental ingredients (C, N, P and S) and metallic elements (e.g. Mn) were discovered, demonstrating its potential roles in the biogeochemical cycle.
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