Comparative genomic and metabolic analysis of manganese-oxidizing mechanisms in Celeribacter manganoxidans DY25T: Its adaptation to the environment of polymetallic nodules

Genomics. 2020 Mar;112(2):2080-2091. doi: 10.1016/j.ygeno.2019.12.002. Epub 2019 Dec 3.

Abstract

Manganese (Mn) nodule is one of the ubiquitous polymetallic concretions and mainly consists of Mn - Fe oxi-hydroxide 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 DY25T, belonging to family Rhodobacteraceae, has ability to catalyze the formation of MnO2 [1]. The concentration of MnO2 formed by harvested cells reached 7.08 μM after suspended in 10 mM HEPES (pH 7.5). Genomic and physiological characteristics of strain DY25T 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.

Keywords: Celeribacter manganoxidans; Comparative genomics; Environmental adaption; Manganese-oxidation; Metabolic analysis.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Bacterial Proteins / genetics*
  • Bacterial Proteins / metabolism
  • Genome, Bacterial*
  • Manganese / metabolism*
  • Oxidation-Reduction
  • Oxidoreductases / genetics*
  • Oxidoreductases / metabolism
  • Rhodobacteraceae / genetics*
  • Rhodobacteraceae / metabolism

Substances

  • Bacterial Proteins
  • Manganese
  • Oxidoreductases

Supplementary concepts

  • Celeribacter manganoxidans