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木腐真菌(鬼伞科)漆酶和过氧化物酶的特性研究

Characterization of laccases and peroxidases from wood-rotting fungi (family Coprinaceae).

作者信息

Heinzkill M, Bech L, Halkier T, Schneider P, Anke T

机构信息

Department of Biotechnology, University of Kaiserslautern, Germany.

出版信息

Appl Environ Microbiol. 1998 May;64(5):1601-6. doi: 10.1128/AEM.64.5.1601-1606.1998.

Abstract

Panaeolus sphinctrinus, Panaeolus papilionaceus, and Coprinus friesii are described as producers of ligninolytic enzymes. P. papilionaceus and P. sphinctrinus both produced a laccase. In addition, P. sphinctrinus produced a manganese peroxidase. C. friesii secreted a laccase and two peroxidases similar to the peroxidase of Coprinus cinereus. The purified laccases and peroxidases were characterized by broad substrate specificities, significant enzyme activities at alkaline pH values, and remarkably high pH optima. The two peroxidases of C. friesii remained active at pH 7.0 and 60 degrees C for up to 60 min of incubation. The peroxidases were inhibited by sodium azide and ethylene glycol-bis (beta-aminoethyl ether)-N,N,N',N'-tetraacetic acid (EGTA), whereas the laccases were inhibited by sodium azide and N,N-diethyldithiocarbamic acid. As determined by native polyacrylamide gel electrophoresis and isoelectric focusing, all three fungi produced laccase isoenzymes.

摘要

皱盖球盖菇、蝶形球盖菇和弗氏鬼伞被描述为木质素分解酶的产生菌。蝶形球盖菇和皱盖球盖菇均产生一种漆酶。此外,皱盖球盖菇还产生一种锰过氧化物酶。弗氏鬼伞分泌一种漆酶和两种类似于灰盖鬼伞过氧化物酶的过氧化物酶。纯化后的漆酶和过氧化物酶具有广泛的底物特异性、在碱性pH值下具有显著的酶活性以及非常高的最适pH值。弗氏鬼伞的两种过氧化物酶在pH 7.0和60℃下孵育长达60分钟仍保持活性。过氧化物酶受到叠氮化钠和乙二醇双(β-氨基乙基醚)-N,N,N',N'-四乙酸(EGTA)的抑制,而漆酶受到叠氮化钠和N,N-二乙基二硫代氨基甲酸盐的抑制。通过非变性聚丙烯酰胺凝胶电泳和等电聚焦测定,所有三种真菌均产生漆酶同工酶。

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