Journal
BIORESOURCE TECHNOLOGY
Volume 100, Issue 6, Pages 2077-2081Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2008.05.021
Keywords
Phanerochaete chrysosporium; Pc reducer; Reductive activity; Lignin biodegradation
Funding
- National Natural Science Foundation of China [30470051]
- National Excellent Doctoral Dissertations Foundation
- Major State Basic Research Development Program of China (973) [2004CB7197]
- Natural Science Foundation of Shandong Province [Y2004D07]
- Postdoctor Foundation of Shandong Province [200603048]
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A novel reductive compound with molecular weight of about 1000 Da, named Pc reducer, was purified from the liquid culture of a white-rot basidiomycete Phanerochaete chrysosporium. It was likely to have an alkene-ester structure according to Fourier-transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance (NMR) spectra. Pc reducer reduced the hydroxyl radical HO center dot and the stable nitroxide radical under certain conditions. It inhibited the repolymerization of the products from the oxidation of phenolic lignin-model compounds by reducing certain intermediate radicals. The activity of manganese peroxidases was promoted by Pc reducer at certain concentrations. Pc reducer could also weaken the repolymerization of fragments from the oxidation of Na-lignosulfonate by lignin peroxidases and manganese peroxidases. It has potential ability to improve the ligninolytic efficiency of peroxidases in P. chrysosporium. (c) 2008 Published by Elsevier Ltd.
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