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Information on EC 1.16.3.3 - manganese oxidase

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EC Tree
     1 Oxidoreductases
         1.16 Oxidizing metal ions
             1.16.3 With oxygen as acceptor
                1.16.3.3 manganese oxidase
IUBMB Comments
The enzyme, which belongs to the multicopper oxidase family, is found in many bacterial strains. It oxidizes soluble manganese(II) to insoluble manganese(IV) oxides. Since the enzyme is localized to the outer surface of the cell, its activity usually results in encrustation of the cells by the oxides. The physiological function of bacterial manganese(II) oxidation remains unclear.
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Word Map
  • 1.16.3.3
  • multicopper
  • mniii
  • mnii-oxidizing
  • biogenic
  • mno2
  • manganeseii
  • biogeochemical
  • manganese-oxidizing
  • geochemical
  • cucl2
The expected taxonomic range for this enzyme is: Bacteria, Eukaryota
Reaction Schemes
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4
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2
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4
=
4
+
8
Synonyms
mn(ii) oxidase, manganese oxidase, mn(ii)-oxidizing enzyme, mn oxidase, mnxefg, manganese(ii) oxidase, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
4 Mn2+ + 2 O2 + 4 H2O = 4 MnIVO2 + 8 H+
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overall reaction
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4 Mn2+ + O2 + 4 H+ = 4 Mn3+ + 2 H2O
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(1a)
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4 Mn3+ + O2 + 6 H2O = 4 MnIVO2 + 12 H+
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(1b)
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