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ENZYME entry: EC

Accepted Name
manganese peroxidase.
Alternative Name(s)
Mn-dependent peroxidase.
Reaction catalysed
2 H(+) + H2O2 + 2 Mn(2+) <=> 2 H2O + 2 Mn(3+)
  • The enzyme from white rot basidiomycetes is involved in the oxidative degradation of lignin.
  • The enzyme oxidizes a bound Mn(2+) ion to Mn(3+) in the presence of hydrogen peroxide.
  • The product, Mn(3+), is released from the active site in the presence of a chelator (mostly oxalate and malate) that stabilizes it against disproportionation to Mn(2+) and insoluble Mn(4+).
  • The complexed Mn(3+) ion can diffuse into the lignified cell wall, where it oxidizes phenolic components of lignin and other organic substrates.
  • It is inactive with veratryl alcohol or nonphenolic substrates.
PRIAM enzyme-specific profiles1.11.1.13
KEGG Ligand Database for Enzyme Nomenclature1.11.1.13
IUBMB Enzyme Nomenclature1.11.1.13
MEDLINEFind literature relating to
Rhea expert-curated reactions1.11.1.13
Q02567, PEM1_PHACH;  Q70LM3, PEM2_PHLRA;  P78733, PEM3_PHACH;  
P83918, PEM_IRPLA;  

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