NDLI: Chitinase Genes LbCHI31 and LbCHI32 from Limonium bicolor Were Successfully Expressed in Escherichia coli and Exhibit Recombinant Chitinase Activities

Content Provider	PubMed Central
Author	Liu, Zhihua Huang, Ying Zhang, Rongshu Diao, Guiping Fan, Haijuan Wang, Zhiying
Copyright Year	2013
Abstract	The two chitinase genes, LbCHI31 and LbCHI32 from Limonium bicolor, were, respectively, expressed in Escherichia coli BL21 strain. The intracellular recombinant chitinases, inrCHI31 and inrCHI32, and the extracellular exrCHI31 and exrCHI32 could be produced into E. coli. The exrCHI31 and exrCHI32 can be secreted into extracellular medium. The optimal reaction condition for inrCHI31 was 5 mmol/L of Mn2+ at 40°C and pH 5.0 with an activity of 0.772 U using Alternaria alternata cell wall as substrate. The optimal condition of inrCHI32 was 5 mmol/L of Ba2+ at 45°C and pH 5.0 with an activity of 0.792 U using Valsa sordida cell wall as substrate. The optimal reaction condition of exrCHI31 was 5 mmol/L of Zn2+ at 40°C and pH 5.0, and the activity was 0.921 U using the A. alternata cell wall as substrate. Simultaneously, the optimal condition of exrCHI32 was 5 mmol/L of K+ at 45°C and pH 5.0, with V. sordida cell wall as the substrate, and the activity was 0.897 U. Furthermore, the activities of extracellular recombinant enzymes on fungal cell walls and compounds were generally higher than those of the intracellular recombinant enzymes. Recombinant exrCHI31 and exrCHI32 have better hydrolytic ability on cell walls of different fungi than synthetic chitins and obviously showed activity against A. alternata.
Related Links	http://dx.doi.org/10.1155/2013/648382
Starting Page	648382
File Format	PDF
ISSN	1537744X
e-ISSN	1537744X
Journal	The Scientific World Journal
Volume Number	2013
Language	English
Publisher	Hindawi Publishing Corporation
Publisher Date	2013-01-01
Access Restriction	Open
Rights Holder	Hindawi Publishing Corporation
Subject Keyword	Biochemistry, Genetics and Molecular Biology(all) Environmental Science(all) Medicine(all) Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Medicine Biochemistry, Genetics and Molecular Biology Environmental Science

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