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Guo Y, Wang N, Wang D, Luo S, Zhang H, Yu D, Wang L, Elfalleh W, Liao C. Preparation of vacuum-assisted conjugated linoleic acid phospholipids under nitrogen: Mechanism of acyl migration of lysophospholipids. Food Chem 2024; 436:137680. [PMID: 37832416 DOI: 10.1016/j.foodchem.2023.137680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 08/26/2023] [Accepted: 10/04/2023] [Indexed: 10/15/2023]
Abstract
Sn-Glycerol-3-phosphatidylcholine (GPC) was prepared by hydrolysis of phosphatidylcholine (PC) catalyzed by phospholipase A1 (PLA1). Nitrogen flow assisted the esterification of conjugated linoleic acid (CLA) and GPC to produce conjugated linoleic acid lysophosphatidylcholine (LPC - CLA). The effects of different reaction conditions on the PC conversion and acyl migration rates were investigated, and the acyl migration mechanism under acidic and alkaline conditions was studied. In addition, the optimum conditions for the esterification of CLA and GPC were selected. The optimal condition for the hydrolysis of PC was an enzyme loading of 5 %, pH of 5, reaction temperature of 50 ℃, and reaction time of 3 h. The results also showed that the maximum esterification rate reached 82.37 % at an enzyme loading of 15 %, CLA/GPC molar ratio of 50:1, and vacuum pressure of 13.3 kPa. This study not only improved the bioavailability of PC but also effectively increased the content of LPC - CLA.
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Affiliation(s)
- Yanfei Guo
- School of Food Science, Northeast Agricultural University, Harbin, 150030, China
| | - Ning Wang
- School of Food Science, Northeast Agricultural University, Harbin, 150030, China
| | - Donghua Wang
- School of Food Science, Northeast Agricultural University, Harbin, 150030, China
| | - Shunian Luo
- School of Food Science, Harbin University of Commerce, Harbin, 150000, China
| | - Hongwei Zhang
- School of Food Science, Northeast Agricultural University, Harbin, 150030, China
| | - Dianyu Yu
- School of Food Science, Northeast Agricultural University, Harbin, 150030, China.
| | - Liqi Wang
- School of Food Science, Harbin University of Commerce, Harbin, 150000, China
| | - Walid Elfalleh
- Energy, Water, Environment and Process Laboratory, (LR18ES35), National Engineering School of Gabes, University of Gabes, Zrig, 6072, Gabes, Tunisia
| | - Changbao Liao
- Heilongjiang Red Star Group Food Co., LTD, Mudanjiang, 157000, China
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Lopes PA, Alfaia CM, Pestana JM, Prates JAM. Structured Lipids Engineering for Health: Novel Formulations Enriched in n-3 Long-Chain Polyunsaturated Fatty Acids with Potential Nutritional Benefits. Metabolites 2023; 13:1060. [PMID: 37887385 PMCID: PMC10608893 DOI: 10.3390/metabo13101060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 09/28/2023] [Accepted: 10/06/2023] [Indexed: 10/28/2023] Open
Abstract
Structured lipids (SLs) offer a promising avenue for designing novel formulations enriched in n-3 long-chain polyunsaturated fatty acids (LCPUFAs) with potential health benefits. Triacylglycerols (TAGs), the most common fats in the human diet, are both non-toxic and chemically stable. The metabolic efficiency and digestibility of TAGs are significantly influenced by the position of fatty acids (FAs) within the glycerol backbone, with FAs at the sn-2 position being readily absorbed. Over the past two decades, advancements in SL research have led to the development of modified TAGs, achieved either through chemical or enzymatic processes, resulting in SLs. The ideal structure of SLs involves medium-chain FAs at the sn-1,3 positions and long-chain n-3 LCPUFAs at the sn-2 position of the glycerol backbone, conferring specific physicochemical and nutritional attributes. These tailored SL formulations find wide-ranging applications in the food and nutraceutical industries, showing promise for dietary support in promoting health and mitigating various diseases. In particular, SLs can be harnessed as functional oils to augment TAG metabolism, thereby impeding the development of fatty liver, countering the onset of obesity, and preventing atherosclerosis and age-related chronic diseases. In scrutinising prevailing research trajectories, this review endeavours to provide an in-depth analysis of the multifaceted advantages and repercussions associated with the synthesis of SLs. It elucidates their burgeoning potential in enhancing health and well-being across a range of demographic cohorts. Specifically, the implications of SL utilisation are discussed in the context of healthcare environments and early childhood developmental support.
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Affiliation(s)
- Paula A. Lopes
- CIISA—Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Pólo Universitário do Alto da Ajuda, Universidade de Lisboa, Avenida da Universidade Técnica, 1300-477 Lisbon, Portugal; (C.M.A.); (J.M.P.); (J.A.M.P.)
- Laboratório Associado para Ciência Animal e Veterinária (AL4AnimalS), Faculdade de Medicina Veterinária, Universidade de Lisboa, 1300-477 Lisbon, Portugal
| | - Cristina M. Alfaia
- CIISA—Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Pólo Universitário do Alto da Ajuda, Universidade de Lisboa, Avenida da Universidade Técnica, 1300-477 Lisbon, Portugal; (C.M.A.); (J.M.P.); (J.A.M.P.)
- Laboratório Associado para Ciência Animal e Veterinária (AL4AnimalS), Faculdade de Medicina Veterinária, Universidade de Lisboa, 1300-477 Lisbon, Portugal
| | - José M. Pestana
- CIISA—Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Pólo Universitário do Alto da Ajuda, Universidade de Lisboa, Avenida da Universidade Técnica, 1300-477 Lisbon, Portugal; (C.M.A.); (J.M.P.); (J.A.M.P.)
- Laboratório Associado para Ciência Animal e Veterinária (AL4AnimalS), Faculdade de Medicina Veterinária, Universidade de Lisboa, 1300-477 Lisbon, Portugal
| | - José A. M. Prates
- CIISA—Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Pólo Universitário do Alto da Ajuda, Universidade de Lisboa, Avenida da Universidade Técnica, 1300-477 Lisbon, Portugal; (C.M.A.); (J.M.P.); (J.A.M.P.)
- Laboratório Associado para Ciência Animal e Veterinária (AL4AnimalS), Faculdade de Medicina Veterinária, Universidade de Lisboa, 1300-477 Lisbon, Portugal
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Martínez-Galán JP, Ontibón-Echeverri CM, Campos Costa M, Batista-Duharte A, Guerso Batista V, Mesa V, Monti R, Veloso de Paula A, Martins Baviera A. Enzymatic synthesis of capric acid-rich structured lipids and their effects on mice with high-fat diet-induced obesity. Food Res Int 2021; 148:110602. [PMID: 34507747 DOI: 10.1016/j.foodres.2021.110602] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 07/07/2021] [Accepted: 07/08/2021] [Indexed: 10/20/2022]
Abstract
The objective of this study was to produce structured lipids (SLs) by enzymatic acidolysis using Rhizopus oryzae lipase covalently immobilized in a low-cost material. Grape seed oil was used to synthesize SLs containing the medium-chain fatty acid (C10:0) capric acid. SL synthesis led to 38.8% medium-chain fatty acid incorporation with 5 reuses of the enzymatic derivative. The reaction conditions for the synthesis of MLM-TAGs (triacylglycerols with one long- and two medium-chain acyl residues) were at a molar ratio of fatty acid:oil of 3:1, performed at 40 °C and lipase immobilized load of 5% (w/w). The in vivo effects of SLs were studied in Swiss mice fed premade diets: control (C) diet, high-fat diet (HFD) with 100% lipid content as lard, HFD with 50% lipid content as grape seed oil (HG) or HFD with 50% lipid content as capric acid-containing SLs produced from grape seed oil (HG-MCT). Mice from HG and HG-MCT groups had decreases in body weight gain and reductions in the weights of white adipose tissues. In addition, HG and HG-MCT mice had low plasma levels of glucose and total cholesterol, and improvements in the glucose tolerance. HG and HG-MCT diets have remarkable antioxidant properties, since low plasma levels of TBARS (thiobarbituric acid reactive substances, biomarkers of lipid peroxidation) were found in mice fed these diets. Interestingly, TBARS levels in HG-MCT mice were further decreased than values of HG mice. Mice fed HG and HG-MCT diets also showed preservation in the activity of the antioxidant enzyme paraoxonase 1. Both HG and HG-MCT diets promoted reduction of IL-6 and IL-10 production by splenocytes. The capric acid-containing SLs produced from grape seed oil emerges as a functional oil capable to mitigate obesity complications resulting from oxidative stress and inflammation.
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Affiliation(s)
- Julián Paul Martínez-Galán
- School of Nutrition and Dietetic, University of Antioquia (UdeA), Calle 70 No. 52-21, Medellín, Colombia.
| | | | - Mariana Campos Costa
- School of Pharmaceutical Sciences, Department of Clinical Analysis, São Paulo State University (Unesp), Araraquara, São Paulo, Brazil
| | - Alexander Batista-Duharte
- School of Pharmaceutical Sciences, Department of Clinical Analysis, São Paulo State University (Unesp), Araraquara, São Paulo, Brazil
| | - Vinicius Guerso Batista
- School of Pharmaceutical Sciences, Department of Bioprocess Engineering and Biotechnology, São Paulo State University (Unesp), Araraquara, São Paulo, Brazil
| | - Victoria Mesa
- School of Nutrition and Dietetic, University of Antioquia (UdeA), Calle 70 No. 52-21, Medellín, Colombia
| | - Rubens Monti
- School of Pharmaceutical Sciences, Department of Bioprocess Engineering and Biotechnology, São Paulo State University (Unesp), Araraquara, São Paulo, Brazil
| | - Ariela Veloso de Paula
- School of Pharmaceutical Sciences, Department of Bioprocess Engineering and Biotechnology, São Paulo State University (Unesp), Araraquara, São Paulo, Brazil.
| | - Amanda Martins Baviera
- School of Pharmaceutical Sciences, Department of Clinical Analysis, São Paulo State University (Unesp), Araraquara, São Paulo, Brazil.
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Abed SM, Elbandy M, Abdel-Samie MA, Ali AH, Korma SA, Noman A, Wei W, Jin Q. Screening of lipases for production of novel structured lipids from single cell oils. Process Biochem 2020. [DOI: 10.1016/j.procbio.2019.12.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Shimizu Y, Konno Y, Tomita Y. Wickerhamomyces psychrolipolyticus f.a., sp. nov., a novel yeast species producing two kinds of lipases with activity at different temperatures. Int J Syst Evol Microbiol 2020; 70:1158-1165. [PMID: 31833830 DOI: 10.1099/ijsem.0.003894] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Two yeast strains isolated from soil collected in Hokkaido, Japan, were found to secrete two extracellular lipases that exhibited activities at both 25 and 4 °C. Both strains could utilize olive oil, rapeseed oil, lard and fish oil as sole carbon sources. The similarity of the D1/D2 domain of the large subunit ribosomal RNA (LSU rRNA) sequence of these yeast strains to that of other yeasts in the GenBank database was very low (<96 %). The phylogenetic trees based on the LSU rRNA sequences and translation elongation factor-1-α (tef1-α) sequences indicated that both strains represented a member of the Wickerhamomyces /Candida clade. Sexual reproduction was not observed. The name Wickerhamomyces psychrolipolyticus f.a., sp. nov is proposed for this newly described yeast species producing cold-active lipases. This novel species is distinguishable from the type strains of other related species, Wickerhamomyces alni, Candida ulmi and Candida quercuum due to their abilities to grow at 4 to 30 °C, to produce lipase that is active also at 4 °C and to assimilate soluble starch.
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Affiliation(s)
- Yumi Shimizu
- Department of Biosciences, College of Science and Engineering, Kanto Gakuin University, 1-50-1 Mutsuura-higashi, Kanazawa-ku, Yokohama, Kanagawa 236-8501, Japan.,NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), 2-5-8 Kazusakamatari, Kisarazu, Chiba 292-0818, Japan
| | - Yusuke Konno
- Department of Biosciences, College of Science and Engineering, Kanto Gakuin University, 1-50-1 Mutsuura-higashi, Kanazawa-ku, Yokohama, Kanagawa 236-8501, Japan
| | - Yosuke Tomita
- Department of Biosciences, College of Science and Engineering, Kanto Gakuin University, 1-50-1 Mutsuura-higashi, Kanazawa-ku, Yokohama, Kanagawa 236-8501, Japan
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Yue C, Ben H, Wang J, Li T, Yu G. Ultrasonic Pretreatment in Synthesis of Caprylic-Rich Structured Lipids by Lipase-Catalyzed Acidolysis of Corn Oil in Organic System and Its Physicochemical Properties. Foods 2019; 8:foods8110566. [PMID: 31718043 PMCID: PMC6915483 DOI: 10.3390/foods8110566] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 10/31/2019] [Accepted: 11/08/2019] [Indexed: 12/16/2022] Open
Abstract
The current work was to evaluate the lipase-catalyzed acidolysis of corn oil with caprylic acid (CA) in organic system under bath ultrasonic pretreatment and to analyze the physicochemical properties of structured lipids (SLs). Under optimum conditions (Novozym 40086 lipase, 200 W ultrasound power, 10 min ultrasound pretreatment time, 12% dosage of lipase, Triacylglycerol (TAG)/Free fatty acids (FFA): 1/8, 40 °C for 6 h), a 45.55% CA incorporation was obtained (named SLs-U). The highest CA incorporation was 32.75% for conventional method at reaction time of 10 h (named SLs-N). The predominant TAG types of SLs were MLM (medium-, long- and medium-chain-type TAGs) and MLL (medium-, long- and long-chain-type TAGs). X-ray diffraction analysis revealed that both SLs-U and SLs-N present β form. Differential scanning calorimetry (DSC) analysis showed that both SLs-U and SLs-N show a lower melting and crystallization temperature than corn oil. This study suggested that bath ultrasonic pretreatment can accelerate lipase-catalyzed acidolysis synthesis of MLM structured lipids in an organic system, and two kinds of structured lipids show similar physicochemical properties.
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Yüksel A, Şahin-Yeşilçubuk N. Use of Echium oil fatty acids and tricaprylin as substrates of enzymatic interesterification for the production of structured lipids. GRASAS Y ACEITES 2018. [DOI: 10.3989/gya.0996171] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Structured lipids (SLs) were produced from the free fatty acids of Echium oil and tricaprylin by enzymatic acidolysis reactions. Lipozyme® RM IM, immobilized sn-1,3 specific lipase was used in the enzymatic reactions. In order to optimize the incorporation of stearidonic acid (SDA), three factors were chosen [Reaction temperature (50-60 ºC), reaction time (6-12 hour) and substrate molar ratio (3-6 mol/mol (total free fatty acids/tricaprylin)] for the application of response surface methodology (RSM) using a central composite circumscribed design (CCC) with five levels. The optimum temperature, time and substrate molar ratio obtained from the models were 60 ºC; 6 h, 6 mol/mol, respectively. Furthermore, SLs with 6.2% SDA content at sn-2 position were produced by scaling up the process. SL was obtained with nearly 78-79% of long-chain fatty acids at the sn-2 position. According to the melting profile analysis, the melting peaks of tricaprylin and Echium oil were sharper and narrower while the SL had more broadened peaks.
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Liu D, Gao H, Tang W, Nie S. Plant non-starch polysaccharides that inhibit key enzymes linked to type 2 diabetes mellitus. Ann N Y Acad Sci 2017; 1401:28-36. [PMID: 28891092 DOI: 10.1111/nyas.13430] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 06/12/2017] [Accepted: 06/12/2017] [Indexed: 12/15/2022]
Abstract
Type 2 diabetes mellitus (T2DM), a metabolic disease becoming ever more common, is the result of disturbed glyco- and lipid metabolism. On the basis of their inhibitory effects against several key enzymes linked to T2DM, synthetic antidiabetic agents have been developed and used for diabetic therapy, some with adverse side effects. Fortunately, many plant non-starch polysaccharides (NSPs) have been shown to possess inhibitory effects on the same T2DM-related enzymes. Through a simple literature search we found that α-amylase, α-glucosidase, lipase, and dipeptidyl-peptidase IV are the enzymes most often reported in the context of T2DM. In this short review we discuss published evidence for inhibition of these enzymes and the implications for treating T2DM.
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Affiliation(s)
- Dan Liu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi, China
| | - He Gao
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi, China
| | - Wei Tang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi, China
| | - Shaoping Nie
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi, China
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Optimization of ultrasonic assisted extraction of fatty acids from Borago Officinalis L. flower by central composite design. ARAB J CHEM 2017. [DOI: 10.1016/j.arabjc.2012.06.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Affiliation(s)
- M. Kavitha
- School of Biosciences and Technology, VIT University, Vellore, India
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Lipase-catalyzed synthesis of palmitanilide: Kinetic model and antimicrobial activity study. Enzyme Microb Technol 2015; 82:82-88. [PMID: 26672452 DOI: 10.1016/j.enzmictec.2015.08.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2015] [Revised: 07/23/2015] [Accepted: 08/28/2015] [Indexed: 10/23/2022]
Abstract
Enzymatic syntheses of fatty acid anilides are important owing to their wide range of industrial applications in detergents, shampoo, cosmetics, and surfactant formulations. The amidation reaction of Mucor miehei lipase Lipozyme IM20 was investigated for direct amidation of triacylglycerol in organic solvents. The process parameters (reaction temperature, substrate molar ratio, enzyme amount) were optimized to achieve the highest yield of anilide. The maximum yield of palmitanilide (88.9%) was achieved after 24 h of reaction at 40 °C at an enzyme concentration of 1.4% (70 mg). Kinetics of lipase-catalyzed amidation of aniline with tripalmitin has been investigated. The reaction rate could be described in terms of the Michaelis-Menten equation with a Ping-Pong Bi-Bi mechanism and competitive inhibition by both the substrates. The kinetic constants were estimated by using non-linear regression method using enzyme kinetic modules. The enzyme operational stability study showed that Lipozyme IM20 retained 38.1% of the initial activity for the synthesis of palmitanilide (even after repeated use for 48 h). Palmitanilide, a fatty acid amide, exhibited potent antimicrobial activity toward Bacillus cereus.
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Kim BH, Akoh CC. Recent Research Trends on the Enzymatic Synthesis of Structured Lipids. J Food Sci 2015; 80:C1713-24. [PMID: 26189491 DOI: 10.1111/1750-3841.12953] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Accepted: 05/28/2015] [Indexed: 11/24/2022]
Abstract
Structured lipids (SLs) are lipids that have been chemically or enzymatically modified from their natural biosynthetic form. Because SLs are made to possess desired nutritional, physicochemical, or textural properties for various applications in the food industry, many research activities have been aimed at their commercialization. The production of SLs by enzymatic procedures has a great potential in the future market because of the specificity of lipases and phospholipases used as the biocatalysts. The aim of this review is to provide concise information on the recent research trends on the enzymatic synthesis of SLs of commercial interest, such as medium- and long-chain triacylglycerols, human milk fat substitutes, cocoa butter equivalents, trans-free or low-trans plastic fats (such as margarines and shortenings), low-calorie fats/oils, health-beneficial fatty acid-rich fats/oils, mono- or diacylglycerols, and structurally modified phospholipids. This limited review covers 108 research articles published between 2010 and 2014 which were searched in Web of Science.
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Affiliation(s)
- Byung Hee Kim
- Dept. of Food Science and Technology, Chung-Ang Univ, Anseong, 456-756, Republic of Korea
| | - Casimir C Akoh
- Dept. of Food Science and Technology, The Univ. of Georgia, Food Science Building, Athens, GA, 30602-2610, U.S.A
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Komaki A, Rasouli B, Shahidi S. Anxiolytic Effect of Borago officinalis (Boraginaceae) Extract in Male Rats. ACTA ACUST UNITED AC 2015. [DOI: 10.17795/ajnpp-27189] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Rahman H, Anggadiredja K, Sitompul JP, Gusdinar T. Synthesis and Characterization of 2-monoacylglycerols from Canarium Oil (Canarium Indicum). ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.profoo.2015.01.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Wan HD, Hu XY, Seo YG, Xia YM. A facile enzymatic synthesis of partial glycerides in an up-flow column reactor. J IND ENG CHEM 2012. [DOI: 10.1016/j.jiec.2012.03.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Lee YY, Tang TK, Lai OM. Health Benefits, Enzymatic Production, and Application of Medium- and Long-Chain Triacylglycerol (MLCT) in Food Industries: A Review. J Food Sci 2012; 77:R137-44. [DOI: 10.1111/j.1750-3841.2012.02793.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Ramandi NF, Najafi NM, Raofie F, Ghasemi E. Central Composite Design for the Optimization of Supercritical Carbon Dioxide Fluid Extraction of Fatty Acids from Borago Officinalis L. Flower. J Food Sci 2011; 76:C1262-6. [DOI: 10.1111/j.1750-3841.2011.02394.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Expression and characterization of a cold-active and xylose-stimulated β-glucosidase from Marinomonas MWYL1 in Escherichia coli. Mol Biol Rep 2011; 39:2937-43. [PMID: 21681424 DOI: 10.1007/s11033-011-1055-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2010] [Accepted: 06/08/2011] [Indexed: 10/18/2022]
Abstract
The gene encoding a cold-active and xylose-stimulated β-glucosidase of Marinomonas MWYL1 was synthesized and expressed in Escherichia coli. The recombinant enzyme (reBglM1) was purified and characterized. The molecular mass of the purified reBglM1 determined by SDS-PAGE agree with the calculated values (50.6 Da). Optima of temperature and pH for enzyme activity were 40 °C and 7.0, respectively. The enzyme exhibited about 20% activity at 5 °C and was stable over the range of pH 5.5-10.0. The presence of xylose significantly enhanced enzyme activity even at higher concentrations up to 600 mM, with maximal stimulatory effect (about 1.45-fold) around 300 mM. The enzyme is active with both glucosides and galactosides and showed high catalytic efficiency (k (cat) = 500.5 s(-1)) for oNPGlc. These characterizations enable the enzyme to be a promising candidate for industrial applications.
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Current awareness on yeast. Yeast 2010. [DOI: 10.1002/yea.1723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Production of MLM-Type Structured Lipids Catalyzed by Immobilized Heterologous Rhizopus oryzae Lipase. J AM OIL CHEM SOC 2010. [DOI: 10.1007/s11746-010-1702-y] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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