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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Glutathione-mediated mineralization of 14C-labeled 2-amino-4,6-dinitrotoluene by manganese-dependent peroxidase H5 from the white-rot fungus Phanerochaete chrysosporium.

Manganese-dependent peroxidase (MnP) H5 from the white-rot fungus Phanerochaete chrysosporium, in the presence of either Mn(II) (10 mM) or GSH (10 mM). was able to mineralize 14C-U-ring-labeled 2-amino-4,6-dinitrotoluene (2-A-4,6-DNT) up to 29% in 12 days. When both Mn(II) and GSH were present, the mineralization extent reached 82%. On the other hand, no significant mineralization was observed in the absence of both Mn(II) and GSH, suggesting the requirement of a mediator [either Mn(II) or GSH] for the degradation of 2-A-4,6-DNT by MnP. Using electron spin resonance (ESR) techniques, it was found that the glutathionyl free radical (GS*) was produced through the oxidation of GSH by MnP in the presence as well as in the absence of Mn(II). GS* was also generated through the direct oxidation of GSH by Mn(III). Our results strongly suggest the involvement of GS* in the GSH-mediated mineralization of 2-A-4,6-DNT by MnP.[1]

References

  1. Glutathione-mediated mineralization of 14C-labeled 2-amino-4,6-dinitrotoluene by manganese-dependent peroxidase H5 from the white-rot fungus Phanerochaete chrysosporium. Van Aken, B., Cameron, M.D., Stahl, J.D., Plumat, A., Naveau, H., Aust, S.D., Agathos, S.N. Appl. Microbiol. Biotechnol. (2000) [Pubmed]
 
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