ID | 15364 |
JaLCDOI | |
Sort Key | 12
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フルテキストURL | |
著者 |
Sakiyama, Takaharu
Department of Bioscience and Biotechnology
Yoshimi, Tsuyoshi
Department of Bioscience and Biotechnology
Miyake, Akira
Department of Bioscience and Biotechnology
Umeoka, Midori
Department of Bioscience and Biotechnology
Tanaka, Atsushi
Daiwa Kasei K.K.
Ozaki, Sho
Daiwa Kasei K.K.
Nakanishi, Kazuhiro
Department of Bioscience and Biotechnology
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抄録 | A monoacylglycerol lipase (MGL) was purified from Pseudomonas sp. LP7315 by ammonium sulfate precipitation, anion-exchange chromatography, and preparative electrophoresis. The purified enzyme was homogeneous on an SDS-polyacrylamide gel with a molecular mass of 59 kDa. Its
hydrolytic activity was confirmed to be specific for monoglycerides: the enzyme did not hydrolyze diand
triglycerides. MGL was found to be stable even after l-h incubation at 65℃. The hydrolytic activity depended not only on temperature and pH but also on the type of monoglyceride used. MGL also catalyzed monoglyceride synthesis at 65℃ in a solvent-free two-phase system, in which fatty acid droplets were dispersed in the glycerol phase with a low water content. The synthetic reaction
proceeded at a constant rate for approximately 24 h and reached an equilibrium after 48 h of reaction. The initial rate of the synthetic reaction depended on several factors: the type of fatty acid used as the substrate, the amounts of fatty acid and glycerol, and the concentration of MGL in the glycerol phase. To analyze the effects of these factors, a kinetic model was developed based on the assumption that the adsorption equilibrium of MGL molecules at the interface between the two phases is the rate-determining factor for the synthetic reaction. The model was found to yield a good approximation of the initial synthetic rate under various reaction conditions. The analysis suggests that the adsorption behavior of MGL onto the interface had a large effect on the initial rate of the monoglyceride synthesis.
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出版物タイトル |
Memoirs of the Faculty of Engineering, Okayama University
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発行日 | 2001-03-27
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巻 | 35巻
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号 | 1-2号
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出版者 | Faculty of Engineering, Okayama University
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出版者(別表記) | 岡山大学工学部
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開始ページ | 137
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終了ページ | 146
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ISSN | 0475-0071
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NCID | AA10699856
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資料タイプ |
紀要論文
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OAI-PMH Set |
岡山大学
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言語 |
英語
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論文のバージョン | publisher
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NAID | |
Eprints Journal Name | mfe
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