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Coelmont T, Van Gaelen P, Smets I. Quantification of hydrolysis activity in a biological wastewater treatment context. Appl Microbiol Biotechnol 2023; 107:2143-2153. [PMID: 36929187 DOI: 10.1007/s00253-023-12465-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 01/17/2023] [Accepted: 02/28/2023] [Indexed: 03/18/2023]
Abstract
This paper reviews currently available methods for hydrolysis activity monitoring of the most commonly encountered enzyme categories in biological wastewater treatment. While highlighting the relevant methods for protein, lipid, carbohydrate, organic phosphate, and ester hydrolysis, the discussion of their pros and cons is predominantly aimed at revealing the relevance of the to-be-hydrolyzed substrates that are used in the methods. These "substrates" should mimic the proteins, lipids, or other polymers that are present in the wastewater and are in the reviewed methods (i) real substrates (i.e., naturally present in the wastewater), (ii) chromogenic substrates, or (iii) fluorogenic substrates. We conclude that exploiting relevant substrates such as casein or starch, containing fluorophores, has the highest potential for meaningful high throughput hydrolysis quantification and that lipase activity monitoring is still cumbersome. Monitoring the hydrolysis activity in biological wastewater treatment systems is an underdeveloped area. With this review, which aims at providing a condensed and practice-oriented overview, we hope to facilitate the start or continuation of such monitoring. This monitoring will only grow in importance, given the transition from wastewater treatment plants towards water resource recovery facilities. KEY POINTS: • Colorimetric-based methods are vulnerable to sludge matrix interference. • Bonds in p-nitrophenol-based methods are not representative for the targeted substrates. • Direct methods with relevant/real substrates are preferred. • Fluorophore-containing (real) substrates enable high throughput screening.
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Affiliation(s)
- Toon Coelmont
- Chemical and Biochemical Reactor Engineering and Safety (CREaS), Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F Box 2424, B-3001, Leuven, Belgium
| | - Pieter Van Gaelen
- Chemical and Biochemical Reactor Engineering and Safety (CREaS), Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F Box 2424, B-3001, Leuven, Belgium
| | - Ilse Smets
- Chemical and Biochemical Reactor Engineering and Safety (CREaS), Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F Box 2424, B-3001, Leuven, Belgium.
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Koopmann IK, Kramer A, Labes A. Development and validation of reliable astaxanthin quantification from natural sources. PLoS One 2022; 17:e0278504. [PMID: 36459522 PMCID: PMC9718415 DOI: 10.1371/journal.pone.0278504] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 11/09/2022] [Indexed: 12/04/2022] Open
Abstract
Astaxanthin derived from natural sources occurs in the form of various esters and stereomers, which complicates its quantitative and qualitative analysis. To simplify and standardize astaxanthin measurement with high precision, an enzymolysis-based astaxanthin quantification method was developed to hydrolyze astaxanthin esters and determine free astaxanthin in all its diastereomeric forms. Astaxanthin standards and differently processed Haematococcus pluvialis biomass were investigated. Linear correlation of standards of all-E-astaxanthin was observed in a measurement range between extract concentrations of 1.0 μg/mL and 11.2 μg/mL with a coefficient of variation below 5%. The diastereomers 9Z-, and 13Z-astaxanthin, and two di-Z-forms were detected. In contrast to the measurement of standards, the observed measurement range was extended to 30 μg/mL in extracts from H. pluvialis. The nature of the sample had to be taken into account for measurement, as cell, respectively, sample composition altered the optimal concentration for astaxanthin determination. The measurement precision of all-E-astaxanthin quantification in dried H. pluvialis biomass (1.2-1.8 mg dried biomass per sample) was calculated with a coefficient of variation of maximum 1.1%, whereas it was below 10% regarding the diastereomers. Complete enzymolysis was performed with 1.0 to 2.0 units of cholesterol esterase in the presence of various solvents with up to 2.0 mg biomass (dry weight). The method was compared with other astaxanthin determination approaches in which astaxanthin is converted to acetone in a further step before measurement. The developed method resulted in a higher total astaxanthin recovery but lower selectivity of the diastereomers. The reliability of photometric astaxanthin estimations was assessed by comparing them with the developed chromatographic method. At later stages in the cell cycle of H. pluvialis, all methods yielded similar results (down to 0.1% deviation), but photometry lost precision at earlier stages (up to 31.5% deviation). To optimize sample storage, the shelf life of astaxanthin-containing samples was investigated. Temperatures below -20°C, excluding oxygen, and storing intact H. pluvialis cells instead of dried or disrupted biomass reduced astaxanthin degradation.
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Affiliation(s)
- Inga K. Koopmann
- ZAiT, Center for Analytics in Technology Transfer of Bio and Food Technology Innovations, Flensburg University of Applied Sciences, Flensburg, Schleswig-Holstein, Germany
| | - Annemarie Kramer
- ZAiT, Center for Analytics in Technology Transfer of Bio and Food Technology Innovations, Flensburg University of Applied Sciences, Flensburg, Schleswig-Holstein, Germany
| | - Antje Labes
- ZAiT, Center for Analytics in Technology Transfer of Bio and Food Technology Innovations, Flensburg University of Applied Sciences, Flensburg, Schleswig-Holstein, Germany
- * E-mail:
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Puglisi MJ, Fernandez ML. The Health Benefits of Egg Protein. Nutrients 2022; 14:nu14142904. [PMID: 35889862 PMCID: PMC9316657 DOI: 10.3390/nu14142904] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 07/11/2022] [Accepted: 07/12/2022] [Indexed: 12/31/2022] Open
Abstract
Once the general public accepts that dietary cholesterol is not a concern for cardiovascular disease risk, foods that have been labeled as high-cholesterol sources, including eggs, may be appreciated for their various other dietary components. One of the nutrients in eggs that deserves further discussion is egg protein. Egg protein has been recognized to be highly digestible and an excellent source of essential amino acids, with the highest attainable protein digestibility-corrected amino acid score. Egg protein has been shown to decrease malnutrition in underdeveloped countries, possibly increase height in children, and protect against kwashiorkor. Egg protein has been demonstrated to be important to skeletal muscle health and protective against sarcopenia. Egg protein also can decrease appetite, resulting in a reduction in the caloric intake from the next meal and weight reduction. Other protective effects of egg protein addressed in this review include protection against infection as well as hypotensive and anti-cancer effects.
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Fisayo Ajayi F, Mudgil P, Gan CY, Maqsood S. Identification and characterization of cholesterol esterase and lipase inhibitory peptides from amaranth protein hydrolysates. Food Chem X 2021; 12:100165. [PMID: 34877527 PMCID: PMC8633574 DOI: 10.1016/j.fochx.2021.100165] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Revised: 11/14/2021] [Accepted: 11/15/2021] [Indexed: 02/09/2023] Open
Abstract
Gastric, microbial and plant-based enzymes were used to produce Amaranth protein hydrolysates (APHs). APHs displayed enhanced cholesterol esterase (CEase) and pancreatic lipase (PL) inhibitory activities. Bromelain generated hydrolysates showed the highest CEase and PL inhibitory activity. FPFPPTLGY, FGAPR, and FPFVPAPT were predicted as potential PL inhibitors and FPFVPAPT as CEase inhibitor.
Human diet is undergoing a shift towards plant-based diet as a sustainable source of protein compared to animal-derived protein. In this study, cholesterol esterase (CEase) and pancreatic lipase (PL) inhibitory activities of amaranth protein hydrolysates (APHs) were studied. Bromelain, chymotrypsin, and actinase E were used for generating APHs at 2, 4 & 6 h of hydrolysis. Higher PL inhibiting potential were observed in bromelain-derived APHs (IC50 = 0.38–0.66 mg/mL) in comparison to intact amaranth proteins (IC50 = 3.93 mg/mL). Bromelain-4 h hydrolysates (AB4) demonstrated significant inhibitory potential for both CEase (IC50 = 0.47 mg/mL) and PL (IC50 = 0.48 mg/mL) activity. Peptide identification in AB-4 hydrolysate revealed that among 17 bioactive peptides, three peptides (FPFPPTLGY, FGAPR, and FPFVPAPT) were predicted as potential PL inhibitors and only one peptide (FPFVPAPT) was predicted as CEase inhibitor based on the number of substrate binding sites on active site of the enzymes. This is the first study providing insights into amaranth protein derived bioactive peptide possessing CEase and LIP inhibitory potential.
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Affiliation(s)
- Feyisola Fisayo Ajayi
- Department of Food Science, College of Agriculture and Veterinary Medicine, United Arab Emirates University, Al-Ain, 15551 UAEmirates
| | - Priti Mudgil
- Department of Food Science, College of Agriculture and Veterinary Medicine, United Arab Emirates University, Al-Ain, 15551 UAEmirates
| | - Chee-Yuen Gan
- Analytical Biochemistry Research Centre (ABrC), Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - Sajid Maqsood
- Department of Food Science, College of Agriculture and Veterinary Medicine, United Arab Emirates University, Al-Ain, 15551 UAEmirates.,Zayed Center for Health Science, United Arab Emirates University, Al-Ain, 15551, United Arab Emirates
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Kato E, Tsuruma A, Amishima A, Satoh H. Proteinous pancreatic lipase inhibitor is responsible for the antiobesity effect of young barley (Hordeum vulgare L.) leaf extract. Biosci Biotechnol Biochem 2021; 85:1885-1889. [PMID: 34048530 DOI: 10.1093/bbb/zbab096] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 05/20/2021] [Indexed: 11/12/2022]
Abstract
Young barley leaves (Hordeum vulgare L.) have various health effects and are employed as an ingredient in the production of health-promoting foods. Promoting antiobesity is one such health effect; however, the mechanism and bioactive compounds are unclear. In this research, young barley leaf extract (YB) was demonstrated to possess pancreatic lipase inhibitory activity. The addition of YB to a high-fat diet in mice increased fecal lipid content, indicating reduced absorption of lipids as the mechanism underlying antiobesity effect. The investigation of bioactive compounds in YB resulted in the identification of fructose-bisphosphate aldolase as a proteinous lipase inhibitor. Maximum inhibition of the protein was 45%, but inhibition was displayed at a concentration as low as 16 ng/mL, which is a characteristic inhibition compared with other reported proteinous lipase inhibitors.
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Affiliation(s)
- Eisuke Kato
- Division of Fundamental AgriScience and Research, Research Faculty of Agriculture, Hokkaido University, Kita-ku, Sapporo, Hokkaido, Japan
| | - Ai Tsuruma
- Division of Applied Bioscience, Graduate School of Agriculture, Hokkaido University, Kita-ku, Sapporo, Hokkaido, Japan
| | - Ayaka Amishima
- Division of Applied Bioscience, Graduate School of Agriculture, Hokkaido University, Kita-ku, Sapporo, Hokkaido, Japan
| | - Hiroshi Satoh
- Nissei Bio Co., Ltd., Megumino-kita, Eniwa, Hokkaido, Japan
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Heterologous expression, kinetic characterization and molecular modeling of a new sn-1,3-regioselective triacylglycerol lipase from Serratia sp. W3. Process Biochem 2021. [DOI: 10.1016/j.procbio.2021.02.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Matsuoka R, Takahashi Y, Muto A, Kimura M. Heated egg white has no effect, but lactic fermented and unheated egg white reduces abdominal fat in rats. Lipids Health Dis 2019; 18:187. [PMID: 31655590 PMCID: PMC6815000 DOI: 10.1186/s12944-019-1133-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Accepted: 10/16/2019] [Indexed: 11/18/2022] Open
Abstract
Background We previously reported the abdominal fat-reducing effect of unheated egg white proteins (EWP); however, unheated egg white is actually rarely consumed. We thus investigated the effect of heated egg white on abdominal fat in rats. Methods Male SD rats were divided into two groups that were allowed to consume different dietary preparations containing casein or heated egg white for 4 weeks (Trial 1). We studied whether a heated form and a lactic fermented form of egg white (FLE) are as effective as unheated egg white for reducing abdominal fat. For this, we divided male SD rats into four groups that were allowed to consume different dietary preparations containing casein, unheated egg white, heated egg white, or lactic fermented egg white for 4 weeks (Trial 2). Results Animals in the heated egg white group showed no significant difference in abdominal fat weight compared with those in the casein group (Trial 1). Animals in the unheated egg white group and the FLE group had significantly lower levels of abdominal fat weight than those in the casein group (Trial 2). Ovalbumin in heated egg white was degraded by pepsin, whereas ovalbumin in unheated egg white and lactic acid fermented egg white was not degraded appreciably by pepsin. It was reported that EWP inhibit triglyceride absorption in rat. In the present study, EWP pepsin hydrolysate inhibited the micellar solubility of fatty acids in vitro. In particular, ovalbumin inhibited the micellar solubility of fatty acids. Conclusions These results indicate that lactic fermented egg white reduces visceral fat in rats and suggest that different levels of susceptibility of ovalbumin to pepsin digestion underlie the varying effectiveness among the egg white preparations.
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Affiliation(s)
- Ryosuke Matsuoka
- R & D Division, Kewpie Corporation, Sengawa Kewport, 2-5-7, Sengawa-cho, Chofu-shi, Tokyo, 182-0002, Japan.
| | - Yayoi Takahashi
- R & D Division, Kewpie Corporation, Sengawa Kewport, 2-5-7, Sengawa-cho, Chofu-shi, Tokyo, 182-0002, Japan
| | - Ayano Muto
- R & D Division, Kewpie Corporation, Sengawa Kewport, 2-5-7, Sengawa-cho, Chofu-shi, Tokyo, 182-0002, Japan
| | - Mamoru Kimura
- R & D Division, Kewpie Corporation, Sengawa Kewport, 2-5-7, Sengawa-cho, Chofu-shi, Tokyo, 182-0002, Japan
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Discovery of arginine-containing tripeptides as a new class of pancreatic lipase inhibitors. Future Med Chem 2019; 11:5-19. [DOI: 10.4155/fmc-2018-0216] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Aim: The inhibition of pancreatic lipase (PL) represents one of the most promising strategies in the search for novel antiobesity drugs. We propose here a pioneering course by exploring tripeptide scaffolds in the way to selective PL inhibitors. Methodology/Results: The peptide series exhibited good PL inhibitory properties in vitro, with all the strongest inhibitors sharing a central arginine, shown in silico to be relevant for the active site-directed activity. The compounds were found devoid of inhibitory properties on acetylcholinesterase. Conclusion: Present results disclosed that basic tripeptides are able to interact efficiently with the PL-binding pocket, where they adopt a binding pose suitable for functional-to-inhibition interactions with key amino acids. Main inhibitor MALA4 may be selected as lead for further optimization.
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Ochiai M, Misaki K, Takeuchi T, Narumi R, Azuma Y, Matsuo T. Egg White Hydrolysate Can Be a Low-Allergenic Food Material to Suppress Ectopic Fat Accumulation in Rats Fed an Equicaloric Diet. J Nutr Sci Vitaminol (Tokyo) 2018; 63:111-119. [PMID: 28552875 DOI: 10.3177/jnsv.63.111] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Egg white (EW) is known as a nutritional protein but can induce allergic reactions in humans. We investigated the dietary effects of EW and its hydrolysate (EWH), which contains less allergen, on body fat accumulation in Wistar rats fed an equicaloric high-fat and high-sucrose diet for 8 wk (Exp A). The pair-feeding of EW and equicaloric-feeding of EWH increased fecal fat excretion and suppressed lipid accumulation in the liver and muscles but not in the abdominal adipose tissues, carcass, or total body. Dietary EWH also suppressed the serum glucose level and alkaline phosphatase activity. Further, we showed a higher dispersibility of EW and EWH in physicochemical assay (Exp B). Next, we investigated the suppressive effects of a single administration of EW and EWH on lipid-induced hypertriglyceridemia and small intestinal meal transit in ddY mice (Exp C). However, a single administration of EW or EWH did not suppress the lipid-induced hypertriglyceridemia nor did it delay the rate of small intestinal transit. These findings indicated that dietary EW and EWH reduce hepatic and muscular (ectopic) fat accumulation mainly by suppressing fat absorption and supplying fat to the liver and muscles. Therefore, the low-allergenic EWH can be effective for the prevention of high-fat-diet-induced obesity.
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Affiliation(s)
- Masaru Ochiai
- School of Veterinary Medicine, Kitasato University.,Faculty of Agriculture, Kagawa University
| | | | | | - Ryoyo Narumi
- School of Veterinary Medicine, Kitasato University
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Mudgil P, Kamal H, Yuen GC, Maqsood S. Characterization and identification of novel antidiabetic and anti-obesity peptides from camel milk protein hydrolysates. Food Chem 2018; 259:46-54. [PMID: 29680061 DOI: 10.1016/j.foodchem.2018.03.082] [Citation(s) in RCA: 130] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 03/18/2018] [Accepted: 03/19/2018] [Indexed: 01/08/2023]
Abstract
In-vitro inhibitory properties of peptides released from camel milk proteins against dipeptidyl peptidase-IV (DPP-IV), porcine pancreatic α-amylase (PPA), and porcine pancreatic lipase (PPL) were studied. Results revealed that upon hydrolysis by different enzymes, camel milk proteins displayed dramatic increase in inhibition of DPP-IV and PPL, but slight improvement in PPA inhibition was noticed. Peptide sequencing revealed a total of 20 and 3 peptides for A9 and B9 hydrolysates respectively, obtained the score of 0.8 or more on peptide ranker and were categorized as potential DPP-IV inhibitory peptides. KDLWDDFKGL in A9 and MPSKPPLL in B9 were identified as most potent PPA inhibitory peptide. For PPL inhibition only 7 and 2 peptides qualified as PPL inhibitory peptides from hydrolysates A9 and B9, respectively. The present study report for the first time PPA and PPL inhibitory and only second for DPP-IV inhibitory potential of protein hydrolysates from camel milk.
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Affiliation(s)
- Priti Mudgil
- Food Science Department, College of Food and Agriculture, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
| | - Hina Kamal
- Food Science Department, College of Food and Agriculture, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
| | - Gan Chee Yuen
- Analytical Biochemistry Research Centre (ABrC), Universiti Sains Malaysia, 11800 USM Penang, Malaysia.
| | - Sajid Maqsood
- Food Science Department, College of Food and Agriculture, United Arab Emirates University, Al-Ain 15551, United Arab Emirates.
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Matsuoka R, Kamachi K, Usuda M, Wang W, Masuda Y, Kunou M, Tanaka A, Utsunomiya K. Lactic-fermented egg white improves visceral fat obesity in Japanese subjects-double-blind, placebo-controlled study. Lipids Health Dis 2017; 16:237. [PMID: 29216922 PMCID: PMC5721610 DOI: 10.1186/s12944-017-0631-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 11/29/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND It was reported that egg white protein (EWP) reduced body fat in rats. We developed a lactic-fermented egg white (LE) that facilitates the consumption of egg whites by fermenting them with lactobacillus, and were able to study their intake in humans. In this double-blind, placebo-controlled design, we evaluated the effect of LE on visceral fat area (VFA). METHODS Participants included 37 adult males and females aged ≥40 years (VFA at navel ≥100 cm2). They were divided into two groups: the control group and the LE group. The control and LE groups consumed drinks containing whey and LE, respectively, for 12 weeks (providing 8 g protein/day). VFA was measured at baseline and at week 12 of intake. Abdominal girth was measured at baseline and at weeks 6 and 12. RESULTS LE intake decreased VFA significantly compared with baseline (-8.89 cm2, p < 0.05), and VFA was significantly lower than that in the control group (+1.71 cm2, p < 0.05). The LE group showed significant improvement in the ratio of visceral to subcutaneous fat area compared with baseline and the control group (p < 0.05). CONCLUSIONS The results demonstrated that LE reduces VFA and improves the ratio of visceral to subcutaneous fat area. As other measurement items were not influenced, we concluded that LE improves visceral fat obesity. TRIAL REGISTRATION This clinical trial was retrospectively registered with the University hospital Medical Information Network (UMIN) Center, ( UMIN000026949 ; registered on 11/04/2017; http://www.umin.ac.jp /).
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Affiliation(s)
- Ryosuke Matsuoka
- R&D Division, Kewpie Corporation, 2-5-7 Sengawa Kewport, Sengawa-Cho, Chofu-Shi, Tokyo, 182-0002 Japan
| | - Keiko Kamachi
- Nutrition Clinic, Kagawa Nutrition University, 3-24-3, Komagome, Toshima-ku, Tokyo, 170-8481 Japan
| | - Mika Usuda
- R&D Division, Kewpie Corporation, 2-5-7 Sengawa Kewport, Sengawa-Cho, Chofu-Shi, Tokyo, 182-0002 Japan
| | - Wei Wang
- R&D Division, Kewpie Corporation, 2-5-7 Sengawa Kewport, Sengawa-Cho, Chofu-Shi, Tokyo, 182-0002 Japan
| | - Yasunobu Masuda
- R&D Division, Kewpie Corporation, 2-5-7 Sengawa Kewport, Sengawa-Cho, Chofu-Shi, Tokyo, 182-0002 Japan
| | - Masaaki Kunou
- R&D Division, Kewpie Corporation, 2-5-7 Sengawa Kewport, Sengawa-Cho, Chofu-Shi, Tokyo, 182-0002 Japan
| | - Akira Tanaka
- Nutrition Clinic, Kagawa Nutrition University, 3-24-3, Komagome, Toshima-ku, Tokyo, 170-8481 Japan
| | - Kazunori Utsunomiya
- Department of Internal Medicine, The Jikei University School of Medicine, 3-25-8, Nishi-shinbashi, Minato-ku, Tokyo, 105-8461 Japan
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Dietary egg-white protein increases body protein mass and reduces body fat mass through an acceleration of hepaticβ-oxidation in rats. Br J Nutr 2017; 118:423-430. [DOI: 10.1017/s0007114517002306] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
AbstractEgg-white protein (EWP) is known to reduce lymphatic TAG transport in rats. In this study, we investigated the effects of dietary EWP on body fat mass. Male rats, 4 weeks old, were fed diets containing either 20 % EWP or casein for 28 d. Carcass protein levels and gastrocnemius leg muscle weights in the EWP group were significantly higher than those in the casein group. In addition, carcass TAG levels and abdominal fat weights in the EWP group were significantly lower than those in the casein group; adipocyte size in abdominal fat in the EWP group was smaller than that in the casein group. To identify the involvement of dietary fat levels in the rats, one of two fat levels (5 or 10 %) was added to their diet along with the different protein sources (EWP and casein). Abdominal fat weight and serum and hepatic TAG levels were significantly lower in the EWP group than in the casein group. Moreover, significantly higher values of enzymatic activity related toβ-oxidation in the liver were observed in the EWP group compared with the casein group. Finally, abdominal fat weight reduction in the EWP group with the 10 % fat diet was lower than that in the EWP group with the 5 % fat diet. In conclusion, our results indicate that, in addition to the inhibition of dietary TAG absorption reported previously, dietary EWP reduces body fat mass in rats through an increase of body protein mass and the acceleration ofβ-oxidation in the liver.
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14
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OCHIAI M, AZUMA Y. Egg White Hydrolysate Improves Glucose Tolerance in Type-2 Diabetic NSY Mice. J Nutr Sci Vitaminol (Tokyo) 2017; 63:422-429. [DOI: 10.3177/jnsv.63.422] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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15
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Jallouli R, Parsiegla G, Carrière F, Gargouri Y, Bezzine S. Efficient heterologous expression of Fusarium solani lipase, FSL2, in Pichia pastoris, functional characterization of the recombinant enzyme and molecular modeling. Int J Biol Macromol 2016; 94:61-71. [PMID: 27620466 DOI: 10.1016/j.ijbiomac.2016.09.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 09/05/2016] [Accepted: 09/08/2016] [Indexed: 11/25/2022]
Abstract
The gene coding for a lipase of Fusarium solani, designated as FSL2, shows an open reading frame of 906bp encoding a 301-amino acid polypeptide with a molecular mass of 30kDa. Based on sequence similarity with other fungal lipases, FSL2 contains a catalytic triad, consisting of Ser144, Asp198, and His256. FSL2 cDNA was subcloned into the pGAPZαA vector containing the Saccharomyces cerevisiae α-factor signal sequence and this construct was used to transform Pichia pastoris and achieve a high-level extracellular production of a FSL2 lipase. Maximum lipase activity was observed after 48h. The optimum activity of the purified recombinant enzyme was measured at pH 8.0-9.0 and 37°C. FSL2 is remarkably stable at alkaline pH values up to 12 and at temperatures below 40°C. It has high catalytic efficiency towards triglycerides with short to long chain fatty acids but with a marked preference for medium and long chain fatty acids. FSL2 activity is decreased at sodium taurodeoxycholate concentrations above the Critical Micelle Concentration (CMC) of this anionic detergent. However, lipase activity is enhanced by Ca2+ and inhibited by EDTA or Cu2+ and partially by Mg2+ or K+. In silico docking of medium chain triglycerides, monogalctolipids (MGDG), digalactolipids (DGDG) and long chain phospholipids in the active site of FSL2 reveals structural solutions.
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Affiliation(s)
- Raida Jallouli
- University of Sfax, Laboratoire de Biochimie et de Génie Enzymatique des Lipases, ENIS route de Soukra, BPW 3038 Sfax, Tunisie
| | - Goetz Parsiegla
- CNRS, Aix Marseille Université, Enzymologie Interfaciale et Physiologie de la Lipolyse UMR7282, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
| | - Frédéric Carrière
- CNRS, Aix Marseille Université, Enzymologie Interfaciale et Physiologie de la Lipolyse UMR7282, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
| | - Youssef Gargouri
- University of Sfax, Laboratoire de Biochimie et de Génie Enzymatique des Lipases, ENIS route de Soukra, BPW 3038 Sfax, Tunisie
| | - Sofiane Bezzine
- University of Sfax, Laboratoire de Biochimie et de Génie Enzymatique des Lipases, ENIS route de Soukra, BPW 3038 Sfax, Tunisie.
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O'Connor CJ, Butler PA, Sutton BM. Bile-Salt-Stimulated Human Milk Lipase: Interaction with Proteins. J BIOACT COMPAT POL 2016. [DOI: 10.1177/088391158800300405] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The initial rates of hydrolysis of triolein, catalyzed by bile-salt-stimulated hu man milk lipase, BSSL, were measured at pH 7.5 and 37 ° C, in the presence of selected proteins, namely immunoglobulin A, α-lactalbumin, lactoferrin, hen egg white lysozyme, pancreatic lipase, myoglobin and the very surface active protein melittin. The esterase activity of the enzyme against 4-nitro- phenylacetate was also measured in the presence of a number of different samples of lactoferrin. Under the conditions used, α-lactalbumin and hen egg white lysozyme had almost no effect on the lipase activity. Immunoglobulin A was slightly inhibitory; lactoferrin, pancreatic lipase and myoglobin were all partially inhibitory; and melittin was capable of almost completely inac tivating the lipase.
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Affiliation(s)
| | - Paul A.G. Butler
- Chemistry Department University of Auckland Private Bag Auckland, New Zealand
| | - Bridget M. Sutton
- Chemistry Department University of Auckland Private Bag Auckland, New Zealand
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17
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Utilization of coconut oil mill waste as a substrate for optimized lipase production, oil biodegradation and enzyme purification studies in Staphylococcus pasteuri. ELECTRON J BIOTECHN 2015. [DOI: 10.1016/j.ejbt.2014.11.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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18
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Matsuoka R, Shirouchi B, Kawamura S, Baba S, Shiratake S, Nagata K, Imaizumi K, Sato M. Dietary egg white protein inhibits lymphatic lipid transport in thoracic lymph duct-cannulated rats. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:10694-10700. [PMID: 25300535 DOI: 10.1021/jf502741b] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Dietary egg white protein (EWP) decreases serum cholesterol levels. We previously showed that EWP decreased cholesterol absorption in the intestine. Rats subjected to permanent lymph duct cannulation were used to investigate the effects of dietary EWP on lipid transport. They were fed diets with 20% EWP and casein, and their lymph was collected to quantify lymphatic lipid levels. Dietary EWP decreased lymphatic cholesterol transport compared with casein. It was previously shown that EWP excluded cholesterol from bile acid micelles. Therefore, pepsin-hydrolyzed EWP and casein were prepared. EWP was not completely digested. Ovalbumin, which is the most abundant protein in EWP, showed resistance to digestion by pepsin. This study investigated the effects of EWP pepsin hydrolysate (EWP-ph) on cholesterol micellar solubility, cholesterol transfer from the micellar to the oil phase, water-holding capacity (WHC), settling volume in water (SV), and relative viscosity and compared them with the effects of casein pepsin hydrolysate (C-ph). EWP-ph significantly decreased the micellar solubility and transfer rate and increased the WHC, SV, and relative viscosity compared with C-ph. Moreover, the pepsin hydrolysate of ovalbumin, a major protein in EWP, played a role in decreasing cholesterol micellar solubility, leading to the inhibition of cholesterol absorption. In conclusion, dietary EWP decreased cholesterol intestinal absorption by exerting combined effects of these physicochemical properties in the gut.
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Affiliation(s)
- Ryosuke Matsuoka
- Laboratory of Nutrition Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School of Kyushu University , 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
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19
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Monoolein production by triglycerides hydrolysis using immobilized Rhizopus oryzae lipase. Int J Biol Macromol 2014; 68:1-6. [DOI: 10.1016/j.ijbiomac.2014.04.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Revised: 03/24/2014] [Accepted: 04/11/2014] [Indexed: 11/27/2022]
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20
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Purification and Biochemical Characterization of a Novel Alkaline (Phospho)lipase from a Newly Isolated Fusarium solani Strain. Appl Biochem Biotechnol 2012; 168:2330-43. [DOI: 10.1007/s12010-012-9940-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2012] [Accepted: 10/05/2012] [Indexed: 10/27/2022]
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21
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Helbig A, Silletti E, Timmerman E, Hamer RJ, Gruppen H. In vitro study of intestinal lipolysis using pH-stat and gas chromatography. Food Hydrocoll 2012. [DOI: 10.1016/j.foodhyd.2011.11.007] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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22
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Gooda Sahib N, Abdul Hamid A, Saari N, Abas F, Pak Dek MS, Rahim M. Anti-Pancreatic Lipase and Antioxidant Activity of Selected Tropical Herbs. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2012. [DOI: 10.1080/10942912.2010.494754] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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23
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Horchani H, Bouaziz A, Gargouri Y, Sayari A. Immobilized Staphylococcus xylosus lipase-catalysed synthesis of ricinoleic acid esters. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.molcatb.2011.11.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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24
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Cloning, characterization and expression of a novel lipase gene from marine psychrotrophic Yarrowia lipolytica. ANN MICROBIOL 2011. [DOI: 10.1007/s13213-011-0348-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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25
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Enzymatic propyl gallate synthesis in solvent-free system: Optimization by response surface methodology. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.molcatb.2010.08.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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26
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van Aken GA. Relating Food Emulsion Structure and Composition to the Way It Is Processed in the Gastrointestinal Tract and Physiological Responses: What Are the Opportunities? FOOD BIOPHYS 2010. [DOI: 10.1007/s11483-010-9160-5] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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27
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Horchani H, Chaâbouni M, Gargouri Y, Sayari A. Solvent-free lipase-catalyzed synthesis of long-chain starch esters using microwave heating: Optimization by response surface methodology. Carbohydr Polym 2010. [DOI: 10.1016/j.carbpol.2009.09.003] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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28
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Emenhiser C, Notturno M, Fennema O. Anin vitroassay for assessing the effects of dietary components such as fiber on lipase-catalyzed hydrolysis of long-chain triacylglycerols. Int J Food Sci Nutr 2009. [DOI: 10.3109/09637489409166156] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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29
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Ben Salah R, Gargouri A, Verger R, Gargouri Y, Mejdoub H. Expression in Pichia pastoris X33 of His-tagged lipase from a novel strain of Rhizopus oryzae and its mutant Asn 134 His: purification and characterization. World J Microbiol Biotechnol 2009. [DOI: 10.1007/s11274-009-0024-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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30
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Inhibitory Effects of Tunisian Marine Algal Extracts on Digestive Lipases. Appl Biochem Biotechnol 2008; 151:71-9. [DOI: 10.1007/s12010-008-8167-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/28/2008] [Indexed: 02/06/2023]
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31
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Aissa I, Bouaziz M, Ghamgui H, Kamoun A, Miled N, Sayadi S, Gargouri Y. Optimization of lipase-catalyzed synthesis of acetylated tyrosol by response surface methodology. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2007; 55:10298-10305. [PMID: 18001032 DOI: 10.1021/jf071685q] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The ability of a noncommercial immobilized lipase from Staphylococcus xylosus (SXLi) to catalyze the transesterification of tyrosol and ethyl acetate was investigated. Response surface methodology was used to evaluate the effects of the temperature (40-60 degrees C), the enzyme amount (50-500 UI), and the ethyl acetate/hexane volume ratio (0.2-1) on the tyrosol acetylation conversion yield. Two independent replicates were carried out under the optimal conditions predicted by the model (reaction temperature 54 degrees C, enzyme amount 500 UI, and volume ratio ethyl acetate/hexane 0.2). The maximum conversion yield reached 95.36 +/- 3.6%, which agreed with the expected value (96.8 +/- 3.7%). The ester obtained was characterized by spectroscopic methods. Chemical acetylation of tyrosol was performed, and the products were separated using HPLC. Among the eluted products from HPLC, mono- and diacetylated derivatives were identified by positive mass spectrometry. Tyrosol and its monoacetylated derivative exert similar antiradicalar activity on 2,2-diphenyl-1-picrylhydrazyle.
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Affiliation(s)
- Imen Aissa
- Laboratoire de Biochimie et de Génie Enzymatique des Lipases, ENIS route de Soukra, 3038 Sfax-Tunisia
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32
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Ghamgui H, Miled N, Karra-chaâbouni M, Gargouri Y. Immobilization studies and biochemical properties of free and immobilized Rhizopus oryzae lipase onto CaCO3: A comparative study. Biochem Eng J 2007. [DOI: 10.1016/j.bej.2007.03.006] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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33
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34
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Ben Salah R, Ghamghui H, Miled N, Mejdoub H, Gargouri Y. Production of butyl acetate ester by lipase from novel strain of Rhizopus oryzae. J Biosci Bioeng 2007; 103:368-72. [PMID: 17502279 DOI: 10.1263/jbb.103.368] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2006] [Accepted: 01/20/2007] [Indexed: 11/17/2022]
Abstract
A new lipase preparation from Rhizopus oryzae was used to catalyze the esterification reaction between acetic acid and butanol to produce butyl acetate ester (pineapple flavor). This flavor compound can be used in food, cosmetic and pharmaceutical industries. Only 3% of butyl acetate was obtained when free lipase was used in the synthesis containing only the substrates. In contrast, the conversion yield reached 25% when immobilized lipase was used under the same conditions. The synthesis of butyl acetate catalyzed by immobilized lipase in nonconventional media was optimized. A maximum conversion yield of 60% in a solvent-free system was obtained under the following conditions: amount of immobilized lipase, 500 IU; amount of initially added water, 45%; acetic acid/butanol molar ratio, 1:1; and in incubation temperature, 37 degrees C. Immobilized lipase could be repeatedly used for three cycles without a decrease in synthesis activity. The production of butyl acetate esters by immobilized R. oryzae lipase was also studied in the presence of organic solvents. Compared with a solvent-free system, the synthesis activity was improved in the presence of heptane and hexane with conversion yields of 80% and 76%, respectively. However, solvent-free systems tend to purify more easily the products without any toxicity and inflammability problems.
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Affiliation(s)
- Riadh Ben Salah
- Laboratoire de Biochimie et de Génie enzymatique des lipases, Ecole Nationale des Ingénieurs de Sfax, Route de Soukra, Boite Postale W, 3038 Sfax, Tunisia
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35
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Sayari A, Mosbah H, Gargouri Y. Importance of the residue Asp 290 on chain length selectivity and catalytic efficiency of recombinant Staphylococcus simulans lipase expressed in E. coli. Mol Biotechnol 2007; 36:14-22. [PMID: 17827533 DOI: 10.1007/s12033-007-0008-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2006] [Revised: 09/20/2006] [Accepted: 11/30/1999] [Indexed: 10/23/2022]
Abstract
In addition to their physiological importance, microbial lipases, like staphylococcal ones, are of considerable commercial interest for biotechnological applications such as detergents, food production, and pharmaceuticals and industrial synthesis of fine chemicals. The gene encoding the extracellular lipase of Staphylococcus simulans (SSL) was subcloned in the pET-14b expression vector and expressed in Esherichia coli BL21 (DE3). The wild-type SSL was expressed as amino terminal His6-tagged recombinant protein. One-step purification of the recombinant lipase was achieved with nickel metal affinity column. The purified His-tagged SSL (His6-SSL) is able to hydrolyse triacylglycerols without chain length selectivity. The major differences among lipases are reflected in their chemical specificity in the hydrolysis of peculiar ester bonds, and their respective capacity to hydrolyse substrates having different physico-chemical properties. It has been proposed, using homology alignment, that the region around the residue 290 of Staphylococcus hyicus lipase could be involved in the selection of the substrate. To evaluate the importance of this environment, the residue Asp290 of Staphylococcus simulans lipase was mutated to Ala using site-directed mutagenesis. The mutant expression plasmid was also overexpressed in Esherichia coli and purified with a nickel metal affinity column. The substitution of Asp290 by Ala was accompanied by a significant shift of the acyl-chain length specificity of the mutant towards short chain fatty acid esters. Kinetic studies of wild-type SSL and its mutant D290A were carried out, and show essentially that the catalytic efficiency (k cat /K M ) of the mutant was affected. Our results confirmed that Asp290 is important for the chain length selectivity and catalytic efficiency of Staphylococcus simulans lipase.
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Affiliation(s)
- Adel Sayari
- Laboratoire de biochimie et de génie enzymatique des lipases, ENIS BPW, Sfax, 3038, Tunisia
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36
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Abstract
PURPOSE OF REVIEW The review evaluates current knowledge of the different lipases catalyzing triglyceride lipolysis in the human digestive tract, focusing on their mode of action - information useful for developing strategies to regulate the bioavailability of fatty acid. RECENT FINDINGS Optimal levels of digestive lipases promote efficient triglyceride lipolysis in healthy humans. Management of fatty acid bioavailability during pancreatic insufficiencies, however, requires enzyme replacement therapy. Such therapy entails gastro-protected porcine pancreatic powder, associated with antacid treatment when duodenal pH is too acidic; recently, enteric-coated high-buffered pancrelipase or recombinant gastric lipase have been used. Another promising strategy is to focus on lipid substrate to optimize lipid-water interface properties. Research on obesity treatment focuses on inhibitors. Orlistat is the first inhibitor to be used extensively. Others treatments are in development, including human pancreatic lipase C-terminal, polyphenols, specific proteins and peptides; however, their relevance has not yet been tested in humans. SUMMARY A better knowledge of lipase structure and mode of action will help the development of new natural inhibitors with fewer secondary effects. More intensive research in protein engineering for recombinant lipase production and in clinical nutrition, together with careful evaluation of patients' individual needs is necessary.
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Affiliation(s)
- Martine Armand
- INSERM, U476 'Nutrition Humaine et Lipides', INRA, UMR1260, Université Méditerranée Aix-Marseille 2, Faculté de Médecine, IPHM-IFR 125, Marseille, France.
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37
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Production of mono-olein by immobilized Staphylococcus simulans lipase in a solvent-free system: Optimization by response surface methodology. Enzyme Microb Technol 2006. [DOI: 10.1016/j.enzmictec.2005.12.014] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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38
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Tsujita T, Takaichi H, Takaku T, Aoyama S, Hiraki J. Antiobesity action of ɛ-polylysine, a potent inhibitor of pancreatic lipase. J Lipid Res 2006; 47:1852-8. [PMID: 16723640 DOI: 10.1194/jlr.m600168-jlr200] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In vitro, -polylysine (EPL) strongly inhibited the hydrolysis of trioleoylglycerol emulsified with phosphatidylcholine (PC) and taurocholate by either pancreatic lipase or carboxylester lipase. The EPL concentration required for 50% inhibition of pancreatic lipase, 0.12 microM, was eight times lower than the concentration of orlistat required for the same effect. The 50% inhibition concentration by EPL was affected by emulsifier species: it was increased approximately 150 times, 70 times, and 230 times on gum arabic, phosphatidylserine, and phosphatidic acid emulsion, respectively, compared with PC emulsion. The 50% inhibition concentration by orlistat was little changed by emulsifier species. Gel-filtration experiments suggested that EPL did not bind strongly to pancreatic lipase, whereas orlistat did. To test the effect of EPL on obesity, mice were fed a high-fat diet containing 0.1, 0.2, or 0.4% EPL. EPL prevented the high-fat diet-induced increase in body weight and weight of the liver and visceral adipose tissues (epididymal and retroperitoneal). EPL also decreased plasma triacylglycerol and plasma cholesterol concentrations and liver triacylglycerol content after they had been increased by the high-fat diet. The fecal weights of mice were increased by the high-fat diet containing EPL compared with the high-fat diet alone. Fecal lipid was also increased by the diet containing EPL. These data clearly show that EPL has an antiobesity function in mice fed a high-fat diet that acts by inhibiting intestinal absorption of dietary fat.
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Affiliation(s)
- Takahiro Tsujita
- Bioscience, Integrated Center for Sciences, Ehime University, Shitsukawa, Toon, 791-0295, Japan.
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Aloulou A, Rodriguez JA, Fernandez S, van Oosterhout D, Puccinelli D, Carrière F. Exploring the specific features of interfacial enzymology based on lipase studies. Biochim Biophys Acta Mol Cell Biol Lipids 2006; 1761:995-1013. [PMID: 16931141 DOI: 10.1016/j.bbalip.2006.06.009] [Citation(s) in RCA: 127] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2006] [Revised: 06/17/2006] [Accepted: 06/27/2006] [Indexed: 11/28/2022]
Abstract
Many enzymes are active at interfaces in the living world (such as in the signaling processes at the surface of cell membranes, digestion of dietary lipids, starch and cellulose degradation, etc.), but fundamental enzymology remains largely focused on the interactions between enzymes and soluble substrates. The biochemical and kinetic characterization of lipolytic enzymes has opened up new paths of research in the field of interfacial enzymology. Lipases are water-soluble enzymes hydrolyzing insoluble triglyceride substrates, and studies on these enzymes have led to the development of specific interfacial kinetic models. Structure-function studies on lipases have thrown light on the interfacial recognition sites present in the molecular structure of these enzymes, the conformational changes occurring in the presence of lipids and amphiphiles, and the stability of the enzymes present at interfaces. The pH-dependent activity, substrate specificity and inhibition of these enzymes can all result from both "classical" interactions between a substrate or inhibitor and the active site, as well as from the adsorption of the enzymes at the surface of aggregated substrate particles such as oil drops, lipid bilayers or monomolecular lipid films. The adsorption step can provide an alternative target for improving substrate specificity and developing specific enzyme inhibitors. Several data obtained with gastric lipase, classical pancreatic lipase, pancreatic lipase-related protein 2 and phosphatidylserine-specific phospholipase A1 were chosen here to illustrate these specific features of interfacial enzymology.
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Affiliation(s)
- Ahmed Aloulou
- Laboratoire d'Enzymologie Interfaciale et de Physiologie de la Lipolyse, CNRS UPR 9025, 31 Chemin Joseph Aiguier, 13009 Marseille Cedex 20, France
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40
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41
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Mosbah H, Sayari A, Bezzine S, Gargouri Y. Expression, purification, and characterization of His-tagged Staphylococcus xylosus lipase wild-type and its mutant Asp 290 Ala. Protein Expr Purif 2006; 47:516-23. [PMID: 16380267 DOI: 10.1016/j.pep.2005.11.013] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2005] [Revised: 11/15/2005] [Accepted: 11/16/2005] [Indexed: 11/15/2022]
Abstract
The gene encoding the extracellular lipase of Staphylococcus xylosus (SXL) was cloned using PCR technique. The sequence corresponding to the mature lipase was subcloned in the pET-14b expression vector, with a strong T7 promoter, to construct a recombinant lipase protein containing six histidine residues at the N-terminal. High level expression of the lipase by Escherichia coli BL21 (DE3) cells harbouring the lipase gene containing expression vector was observed upon induction with 0.4 mM IPTG at 37 degrees C. One-step purification of the recombinant lipase was achieved with Ni-NTA resin. The specific activity of the purified His-tagged SXL was 1500 or 850 U/mg using tributyrin or olive oil emulsion as substrate, respectively. It has been proposed that the region near the residue Asp290 could be involved in the selection of the substrate. Therefore, we also mutated the residue Asp 290 by Ala using site-directed mutagenesis. The mutant SXL-D290A was overexpressed in E. coli BL21 (DE3) and purified with the same nickel metal affinity column. The specific activity of the purified His-tagged SXL-D290A mutant was 1000 U/mg using either tributyrin or olive oil emulsion as substrate. A comparative study of the wild type (His(6)-SXL) and the mutant (His(6)-SXL-D290A) proteins was carried out. Our results confirmed that Asp290 is important for the chain length specificity and catalytic efficiency of the enzyme.
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Affiliation(s)
- Habib Mosbah
- Laboratoire de Biochimie et de Génie Enzymatique des Lipases, Sfax, Tunisia
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42
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Ghamgui H, Karra-Chaâbouni M, Bezzine S, Miled N, Gargouri Y. Production of isoamyl acetate with immobilized Staphylococcus simulans lipase in a solvent-free system. Enzyme Microb Technol 2006. [DOI: 10.1016/j.enzmictec.2005.08.011] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Mosbah H, Sayari A, Mejdoub H, Dhouib H, Gargouri Y. Biochemical and molecular characterization of Staphylococcus xylosus lipase. Biochim Biophys Acta Gen Subj 2005; 1723:282-91. [PMID: 15837431 DOI: 10.1016/j.bbagen.2005.03.006] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2004] [Revised: 02/28/2005] [Accepted: 03/01/2005] [Indexed: 11/30/2022]
Abstract
The Staphylococcus xylosus strain secretes a non-induced lipase in culture medium: S. xylosus lipase (SXL). Pure SXL is a monomeric protein (43 kDa). The 23 N-terminal amino acid residues were sequenced. This sequence is identical to that of Staphylococcus simulans lipase (SSL); in addition, it exhibits a high degree of homology with Staphylococcus aureus lipase (SAL NCTC 8530) sequences. The cloning and sequencing of gene part encoding the mature lipase shows one nucleotide difference with SSL, which corresponds to the change of one residue at a position 311. The lipase activity is maximal at pH 8.2 and 45 degrees C. SXL is able to hydrolyse triacylglycerols without chain length specificity. The specific activity of about 1900 U/mg was measured using tributyrin or triolein as substrate at pH 8.2 and at 45 degrees C in the presence of 2 mM CaCl2. In contrast to some previously characterized staphylococcal lipases, Ca2+ is not required to trigger the activity of SXL. SXL was found to be stable between pH 5 and pH 8.5. The enzyme maintains 50% of its activity after a 15-min incubation at 60 degrees C. Using tripropionin or vinyl esters as substrates, SXL does not present the interfacial activation phenomenon. Unlike many lipases, SXL is able to hydrolyse its substrate in the presence of bile salts or amphiphilic proteins. SXL is a serine enzyme, which is inhibited by THL.
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Affiliation(s)
- Habib Mosbah
- Laboratoire de biochimie et de génie enzymatique des lipases, ENIS, BPW 3038 Sfax, Tunisia
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Ali YB, Carrière F, Verger R, Petry S, Muller G, Abousalham A. Continuous monitoring of cholesterol oleate hydrolysis by hormone-sensitive lipase and other cholesterol esterases. J Lipid Res 2005; 46:994-1000. [PMID: 15716583 DOI: 10.1194/jlr.m400509-jlr200] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Hormone-sensitive lipase (HSL) contributes importantly to the hydrolysis of cholesteryl ester in steroidogenic tissues, releasing the cholesterol required for adrenal steroidogenesis. HSL has broad substrate specificity, because it hydrolyzes triacylglycerols (TAGs), diacylglycerols, monoacylglycerols, and cholesteryl esters. In this study, we developed a specific cholesterol esterase assay using cholesterol oleate (CO) dispersed in phosphatidylcholine and gum arabic by sonication. To continuously monitor the hydrolysis of CO by HSL, we used the pH-stat technique. For the sake of comparison, the hydrolysis of CO dispersion was also tested using other cholesteryl ester-hydrolyzing enzymes. The specific activities measured on CO were found to be 18, 100, 27, and 3 micromol/min/mg for HSL, cholesterol esterase from Pseudomonas species, Candida rugosa lipase-3, and cholesterol esterase from bovine pancreas, respectively. The activity of HSL on CO is approximately 4- to 5-fold higher than on long-chain TAGs. In contrast, with all other enzymes tested, the rates of TAG hydrolysis were higher than those of CO hydrolysis. The relatively higher turnover of HSL on CO observed in vitro adds further molecular insight on the physiological importance of HSL in cholesteryl ester catabolism in vivo. Thus, HSL could be considered more as a cholesteryl ester hydrolase than as a TAG lipase.
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Affiliation(s)
- Yassine Ben Ali
- Enzymology at Interfaces and Physiology of Lipolysis, Unité Propre de Recherche 9025, Centre National de la Recherche Scientifique, 13402 Marseille Cedex 20, France
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Sharma N, Sharma VK, Seo SY. Screening of some medicinal plants for anti-lipase activity. JOURNAL OF ETHNOPHARMACOLOGY 2005; 97:453-456. [PMID: 15740880 DOI: 10.1016/j.jep.2004.11.009] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2004] [Revised: 10/13/2004] [Accepted: 11/12/2004] [Indexed: 05/24/2023]
Abstract
In order to find new pancreatic lipase (triacylglycerol lipase, EC 3.1.1.3) inhibitors from natural sources, 75 medicinal plants belonging to different families were screened for their anti-lipase activity, using a radioactive method. On evaluating the results, methanolic extracts of three plants namely, Eriochloa villosa (Thunb.) Kunth, Orixa japonica Thunb. and Setaria italica (L.) Palib., exhibited strong in vitro anti-lipase activity (above 80%). These plants will be studied further to elucidate the structure and chemical properties of the active compound responsible for anti-lipase action.
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Affiliation(s)
- Niti Sharma
- Applied Biotechnology Laboratory, Department of Biology, College of Natural Science, Kongju National University, Kongju 314-701, Korea
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Tsujita T, Sumiyoshi M, Takaku T, Momsen WE, Lowe ME, Brockman HL. Inhibition of lipases by epsilon-polylysine. J Lipid Res 2003; 44:2278-86. [PMID: 12951365 DOI: 10.1194/jlr.m300151-jlr200] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Oral administration of epsilon-polylysine to rats reduced the peak plasma triacylglycerol concentration. In vitro, epsilon-polylysine and polylysine strongly inhibited the hydrolysis, by either pancreatic lipase or carboxylester lipase, of trioleoylglycerol (TO) emulsified with phosphatidylcholine (PC) and taurocholate. The epsilon-polylysine concentration required for complete inhibition of pancreatic lipase, 10 microg/ml, is 1,000 times lower than that of BSA required for the same effect. Inhibition requires the presence of bile salt and, unlike inhibition of lipase by other proteins, is not reversed by supramicellar concentrations of bile salt. Inhibition increases with the degree of polylysine polymerization, is independent of lipase concentration, is independent of pH between 5.0 and 9.5, and is accompanied by an inhibition of lipase binding to TO-PC emulsion particles. However, epsilon-polylysine did not inhibit the hydrolysis by pancreatic lipase of TO emulsions prepared using anionic surfactants, TO hydrolysis catalyzed by lingual lipase, or the hydrolysis of a water-soluble substrate. In the presence of taurocholate, epsilon-polylysine becomes surface active and adsorbs to TO-PC monomolecular films. These results are consistent with epsilon-polylysine and taurocholate forming a surface-active complex that binds to emulsion particles, thereby retarding lipase adsorption and triacylglycerol hydrolysis both in vivo and in vitro.
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Affiliation(s)
- Takahiro Tsujita
- Central Research Laboratory, School of Medicine, Ehime University, Shigenobu, Onsen-gun, Ehime 791-0295, Japan.
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Tiss A, Lengsfeld H, Hadváry P, Cagna A, Verger R. Transfer of orlistat through oil-water interfaces. Chem Phys Lipids 2002; 119:41-9. [PMID: 12270672 DOI: 10.1016/s0009-3084(02)00051-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The transfer of radiolabelled orlistat ([14C]orlistat), a potent gastrointestinal lipase inhibitor, through an oil-water interface from a single oil droplet to an aqueous phase was investigated, using an oil drop tensiometer. The absolute transfer fluxes were found to be very low, even in the presence of micellar concentrations of bile salts, which increased their values from 0.2 to 2.5 and 6.5 pmol cm(-2) min(-1) in the presence of 0, 4 and 15 mM NaTDC, respectively. Adding either a lipid emulsion or pure human pancreatic lipase (HPL) or human serum albumin or beta-lactoglobulin had no effect on the flux of transfer of orlistat. The presence of colipase or a mixture of colipase and HPL was found, however, to reduce the flux of orlistat transfer, probably because it partly covered the single oil drop surface, even in the presence of bile salts. Using a finely emulsified system, we investigated the partitioning of orlistat between the aqueous and oil phases, in the absence or presence of bile salts above their CMC (4 mM NaTDC, final concentration). Under these emulsified conditions, orlistat was found to be mostly associated with the oil phase, since more than 98.8% of the total radioactivity was recovered after decantation with the oil phase. The low transfer rates of orlistat, as well as its partitioning coefficient between the oil and the aqueous phases, should help us to better understand the inhibitory effects of orlistat on lipid digestion in humans.
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Affiliation(s)
- Ali Tiss
- Laboratoire de Lipolyse Enzymatique, UPR 9025, du CNRS, Marseille, France
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Sayari A, Agrebi N, Jaoua S, Gargouri Y. Biochemical and molecular characterization of Staphylococcus simulans lipase. Biochimie 2001; 83:863-71. [PMID: 11698108 DOI: 10.1016/s0300-9084(01)01327-x] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Staphylococcus simulans strain secretes a non-induced lipase in the culture medium. Staphylococcus simulans lipase (SSL), purified to homogeneity, is a tetrameric protein (160 kDa) corresponding to the association of four lipase molecules. The 30 N-terminal amino acid residues were sequenced. This sequence is identical to the one of Staphylococcus aureus PS54 lipase (SAL PS54) and exhibits a high degree of homology with Staphylococcus aureus NCTC8530 lipase (SAL NCTC8530), Staphylococcus hyicus lipase (SHL) and Staphylococcus epidermis RP62A lipase (SEL RP62A) sequences. But the cloning and sequencing of the part of the gene encoding the mature lipase show some differences from SAL PS54 sequence, which suggest that it is a new sequence. The lipase activity was maximal at pH 8.5 and 37 degrees C. SSL is able to hydrolyze triacylglycerols without chain length specificity. A specific activity of about 1000 U/mg was measured on tributyrin or triolein as substrate at 37 degrees C and at pH 8.5 in the presence of 3 mM CaCl(2). In contrast to other staphylococcal lipases previously characterized, Ca(2+) is not required to express the activity of SSL. SSL was found to be stable between pH 4 and pH 9. The enzyme is inactivated after a few minutes when incubated at 60 degrees C. Using tripropionin as substrate, SSL does not present the interfacial activation phenomenon. In contrast to many lipases, SSL is able to hydrolyze its substrate in the presence of bile salts or amphiphilic proteins.
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Affiliation(s)
- A Sayari
- Unité de Lipolyse Enzymatique, ENIS, BPW, 3038 Sfax, Tunisia
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Abstract
The possible presence of an inhibitor of pancreatic lipase (triacylglycerol acylhydrolase, EC 3.1.1.3) was screened in 54 marine algae. An active inhibitor, caulerpenyne, was purified from an extract of Caulerpa taxifolia, using ethyl acetate extraction, followed by successive chromatographies on ODS and silica gel columns. The purified inhibitor was identified by thin-layer chromatography, infrared and nuclear magnetic resonance spectroscopy. Caulerpenyne competitively inhibited lipase activities using emulsified triolein and dispersed 4-methylumbelliferyl oleate (4-MU oleate) as substrates. The concentrations producing 50% inhibition against triolein and 4-MU oleate hydrolysis were 2 mM and 13 microM, respectively. In vivo, oral administration of corn oil with or without caulerpenyne to rats demonstrated a reduced and delayed peak plasma triacylglycerol concentration with caulerpenyne.
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Affiliation(s)
- N Bitou
- Marine Greens Laboratory Co., Ltd., Iyo-city, Ehime, Japan
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