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中国生物工程杂志

China Biotechnology
China Biotechnology  2010, Vol. 30 Issue (08): 82-87    DOI: Q93-3
    
Research on Screening , Identification and Enzyme Producing Characteristics of Chitinase Producer
ZHANG Hai-tao,WANG Ting,TIAN Nan,LIU Xin-li
Shandong Provincial Key Laboratory of Microbial Engineering, Shandong Institute of Light Industry, Jinan 250353, China
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Abstract  

C65-2 strain with high chitinase producing ability was isolated from soil and identified it as Aspergillus fumigatus by observing its morphology character and measuring its 18S rDNA sequence. The chitinase producing conditions was optimized. The maximum activity could be up to 6.9 U/ml and the enzyme activity increased 210% than before. The study of enzymatic properties of the chitinase showed that the molecular weight was 20 Kda. Thermostable stability of the chitinase was not good and the enzyme activity reduced to 0 at 60 ℃ for 50 min. The optimal enzyme reaction temperature was 55 ℃ and the optimal pH of enzyme reaction was 7.0. The chitinase activity can be enhanced by Mg2+,Cu2+ and inhibited by Fe3+.



Key wordsChitin      Chitinase      Aspergillus fumigatus      Enzyme producing characteristics     
Received: 24 February 2010      Published: 25 August 2010
Cite this article:

ZHANG Hai-Chao, WANG Ting, TIAN Nan, LIU Xin-Li. Research on Screening , Identification and Enzyme Producing Characteristics of Chitinase Producer. China Biotechnology, 2010, 30(08): 82-87.

URL:

https://manu60.magtech.com.cn/biotech/Q93-3     OR     https://manu60.magtech.com.cn/biotech/Y2010/V30/I08/82

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