Optimization of extracellular thermophilic highly alkaline lipase from thermophilic Bacillus sp isolated from Hotspring of Arunachal Pradesh, India

Brazilian Journal of Microbiology

Limpon Bora²  Minakshi Bora¹ 

[1] ,Tezpur University Dept of Molecular Biology & Biotechnology Tezpur

关键词: Thermophilic bacteria;    Thermostable;    Alkaline lipase and Bacillus sp;   

DOI  :  10.1590/S1517-83822012000100004

来源: SciELO

【 摘 要 】

Studies on lipase production were carried out with a bacterial strain (Bacillus sp LBN 2) isolated from soil sample of hotspring of Arunachal Pradesh, India. The cells were cultivated in a mineral medium with maximum production at 1% groundnut oil. The optimum temperature and initial medium pH for lipase production by the organism were 50ºC and 9.0 respectively. The molecular mass was found to be 33KDa by SDS PAGE. The optimal pH and temperature for activity were 10 and 60ºC respectively. The enzyme was found to be stable in the pH range of 8-11 with 90% retention of activity at pH 11. The enzyme retained 90% activity at 60ºC and 70% of activity at 70ºC for 1h. The lipase was found to be stable in acetone followed by ethanol. The present findings suggested the enzyme to be thermophilic alkaline lipase.

【 授权许可】

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