Hydroxamate iron complex with phenoloxidase activity acting on lignin and chlorolignins.
The properties of a siderophore model, acetohydroxamic acid (AHA), of desferral were studied. The pH, ionic strength, and AHA/Fe(III) ratios for o-dianisidine oxidation were optimized. Phenoloxidase activity of hydroxamates/Fe(III) acting on o-dianisidine at pH 7.0 and pH 3.0 was observed. Under these conditions, AHA was able to reduce Fe(III) to Fe(II) followed by ferrozine complexation. AHA/Fe(III) complex degraded lignin and chlorolignins from kraft effluent E1 65% and 85%, respectively, after 24 h.
Parra
C
C
Biological Chemistry Laboratory, Universidade Estadual de Campinas, S.P., Brazil.
Santiago
M F
MF
Rodriguez
J
J
Durán
N
N
D001673:Biodegradation, Environmental; D003676:Deferoxamine / Q000378:metabolism; D005658:Fungi / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D006877:Hydroxamic Acids / Q000378:metabolism*; D007501:Iron / Q000378:metabolism*; D007502:Iron Chelating Agents / Q000378:metabolism; D008031:Lignin / Q000031:analogs & derivatives / Q000378:metabolism*; D008956:Models, Chemical; D014442:Monophenol Monooxygenase / Q000378:metabolism*; D010084:Oxidation-Reduction; D017262:Siderophores / Q000378:metabolism
D006877:Hydroxamic Acids; D007502:Iron Chelating Agents; D017262:Siderophores; C006358:acetohydroxamic acid; C076152:chlorolignin; D008031:Lignin; D007501:Iron; D014442:Monophenol Monooxygenase; D003676:Deferoxamine