Study on low-temperature lipase of psychrophilic bacterium 2-5-10-1 isolated fro

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Study on low-temperature lipase of psychrophilic bacterium 2-5-10-1 isolated from deep sea of Southern Ocean

A strain of psychrophilic bacterium, 2-5-10-1, which produces low-temperature lipase, is isolated from the deep sea of Prydz Bay in Southern Ocean. The highest lipase secretion of this strain is observed at 5 ℃ and this temperature is also for optimal growth. Tween 80 and olive oil enhance secretion of lipase. The optimal temperature and pH for lipase activity are 35 ℃ and 7.5 ℃ respectively. At 0℃, the lipase still has 37% relative enzyme activity. The lipase shows high thermolability, more than 50% activity lost after incubation at 60 ℃ for 15 min. EDTA has no effect on lipase activity, indicating the lipase activity is independent of divalent cation. In contrast, the lipase activity is inhibited drastically by Cu2 + and Zn2 +.水利论文5j:`2O,icJd

作 者: Lin Xuezheng Yang Xiuxia BIAN Ji Huang Xiaohang  
作者单位:Lin Xuezheng,BIAN Ji,Huang Xiaohang(First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China)水利论文}X$m&yi T(X@
Yang Xiuxia(Fishery College, Ocean University of China, Qingdao 266003, China) 
刊 名:海洋学报(英文版)  SCI
英文刊名:ACTA OCEANOLOGICA SINICA 
年,卷(期):2003 22(4) 
分类号:P7 
关键词:Southern Ocean   deep sea psychrophilic bacteria   low-temperature lipase  
机标关键词:enzyme activitySouthern OceanPrydz Bayolive oil 
基金项目:supported by 10th five-year plan 
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