Identification of naphthalene metabolism by white rot fungus Armillaria sp F022

被引:35
作者
Hadibarata, Tony [1 ]
Yusoff, Abdull Rahim Mohd [1 ]
Aris, Azmi [1 ]
Kristanti, Risky Ayu [2 ]
机构
[1] Univ Teknologi Malaysia, Inst Environm & Water Resources Management, Skudai 81310, Johor, Malaysia
[2] Yamanashi Univ, Dept Chem & Environm Engn, Kofu, Yamanashi 4008510, Japan
关键词
Arrnillaria sp F022; dioxygenase enzymes; ligninolytic enzymes; naphthalene metabolites; 1,4-naphthaquinone; POLYCYCLIC AROMATIC-HYDROCARBONS; PHANEROCHAETE-CHRYSOSPORIUM; BIODEGRADATION; PHENANTHRENE; DEGRADATION; OXIDATION; MECHANISM; LACCASE;
D O I
10.1016/S1001-0742(11)60843-7
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Arrrallaria sp. F022, a white rot fungus isolated from tropical rain forest (Samarinda, Indonesia) was used to biodegrade naphthalene in cultured medium. Transformation of naphthalene by Armillaria sp. F022 which is able to use naphthalene, a two ring-polycyclic aromatic hydrocarbon (PAH) as a source of carbon and energy was investigated. The metabolic pathway was elucidated by identifying metabolites, biotransformation studies and monitoring enzyme activities in cell-free extracts. The identification of metabolites suggests that Armillaria sp. F022 initiates its attack on naphthalene by dioxygenation at its C-1 and C-4 positions to give 1,4-naphthoquinone. The intermediate 2-hydroxybenzaldehyde and salicylic acid, and the characteristic of the meta-cleavage of the resulting diol were identified in the long-term incubation. A part from typical metabolites of naphthalene degradation known from mesophiles, benzoic acid was identified as the next intermediate for the naphthalene pathway of this Armillaria sp. F022. Neither phthalic acid, catechol and cis, cis-muconic acid metabolites were detected in culture extracts. Several enzymes (manganese peroxidase, lignin peroxidase, laccase, 1,2-dioxygenase and 2,3-dioxygenase) produced by Armillaria sp. F022 were detected during the incubation.
引用
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页码:728 / 732
页数:5
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