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Prediction of Biodegradation Rate Constants of Hydroxylated Polychlorinated Biphenyls by Fungal Laccases from Trametes versicolor and Pleurotus ostreatus


Quantitative structure-activity relationship (QSAR) models for fungal laccase-catalyzed degradation of different hydroxylated polychlorinated biphenyls (OH-PCBs) were developed using some fundamental quantum chemical descriptors. The cross-validated Q 2 cum values for the two optimal QSAR models are as high as 0.958 and 0.961 for laccases from Trametes versicolor and Pleurotus ostreatus, respectively, indicating good predictive abilities for laccase-catalyzed degradation of OH-PCBs. Results from this study show that increasing heat of formation (ΔH f) and frontier molecular orbital energy (i.e. E LUMO + E HOMO) values or decreasing frontier molecular orbital energy (i.e. E HOMO−1) and core-core repulsion energy (CCR) values leads to the increase of OH-PCB degradation rates by laccases.

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The research was supported by the National High Technology Research and Development Program of China (863 Project, 2006AA06Z323).

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Correspondence to J. F. Niu.

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Jiang, G.X., Niu, J.F., Zhang, S.P. et al. Prediction of Biodegradation Rate Constants of Hydroxylated Polychlorinated Biphenyls by Fungal Laccases from Trametes versicolor and Pleurotus ostreatus . Bull Environ Contam Toxicol 81, 1–6 (2008).

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  • Hydroxylated PCBs
  • QSARs
  • Laccases
  • Biodegradation