کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8329670 | 1540228 | 2016 | 24 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Lipase of Bacillus stratosphericus L1: Cloning, expression and characterization
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موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
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چکیده انگلیسی
Present work was undertaken to discover new lipolytic enzymes as well as novel bacterial strains for applications in biotechnology. One of the isolated strains identified as Bacillus stratosphericus L1 produced extracellular lipase (LipBST) which was cloned and expressed in Escherichia coli. Purified mature enzyme had a molecular mass of 19 kDa. Recombinant protein showed an activity of 6244.5 U/mg at pH 9, 35 °C. It was stable in the range of 35-55 °C and retained more than 60% activity after incubation for 4 h. LipBST was activated by organic solvents such as acetone and n-hexane. Lipase was inactivated by all investigated metal ions, inhibitors and detergents. LipBST was determined to be short-chain specific, but also hydrolyzed medium-, long-chain p-nitrophenyl and natural fatty substrates. The values of Vmax and KM for p-nitrophenyl butyrate, p-nitrophenyl caprylate, p-nitrophenyl decanoate were 1.1, 2.5, 0.1 mM minâ1 and 5 Ã 10â2, 3.4 Ã 10â2, 194 Ã 10â2 mM, respectively. Biochemical characteristics of LipBST suggest a great potential for various biotechnological applications including detergent formulation, bioremediation and organic synthesis processes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Biological Macromolecules - Volume 92, November 2016, Pages 96-104
Journal: International Journal of Biological Macromolecules - Volume 92, November 2016, Pages 96-104
نویسندگان
Alisa Gricajeva, Vida BendikienÄ, Lilija KalÄdienÄ,