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产芽孢杆菌几丁质酶(ChiA)的表达和特性,适合用于几丁质废物的生物转化。

Expression and characterization of Bacillus licheniformis chitinase (ChiA), suitable for bioconversion of chitin waste.

机构信息

Synchrotron Light Research Institute (Public Organization), 111 University Avenue, Nakhon Ratchasima 30000, Thailand.

出版信息

Bioresour Technol. 2010 Jun;101(11):4096-103. doi: 10.1016/j.biortech.2010.01.036. Epub 2010 Feb 4.

Abstract

Chitinase (EC 3.2.1.14) is an enzyme with multiple industrial applications. These include bioconversion of chitin waste, a highly resistant and abundant biopolymer from crustacean food industry, into glucosamine and chito-oligosaccharide value-added products. This paper reports on the expression of endochitinase (ChiA) from Bacillus licheniformis strain DSM8785 in E. coli and characterization of the recombinant enzyme. Recombinant ChiA could efficiently convert colloidal chitin to N-acetyl glucosamine and chitobiose at pH 4.0, 6.0 and 9.0 at 50 degrees C and retained its activity up to 3days under these conditions, suggesting that this enzyme is suitable for bioconversion of chitin waste.

摘要

几丁质酶(EC 3.2.1.14)是一种具有多种工业应用的酶。这些应用包括甲壳素废物的生物转化,甲壳素废物是一种来自甲壳类食品工业的高抗性和丰富的生物聚合物,转化为氨基葡萄糖和壳寡糖增值产品。本文报道了地衣芽孢杆菌 DSM8785 内切几丁质酶(ChiA)在大肠杆菌中的表达和重组酶的特性。重组 ChiA 能够在 pH4.0、6.0 和 9.0 下,在 50°C 下高效地将胶体几丁质转化为 N-乙酰葡萄糖胺和壳二糖,并且在这些条件下保持活性长达 3 天,这表明该酶适合于甲壳素废物的生物转化。

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