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Zhao Y, Tian R, Xu Z, Jiang L, Sui X. Recent advances in soy protein extraction technology. J AM OIL CHEM SOC 2022. [DOI: 10.1002/aocs.12676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Yuan Zhao
- College of Food Science Northeast Agricultural University Harbin China
| | - Ran Tian
- College of Food Science Northeast Agricultural University Harbin China
| | - Zejian Xu
- College of Food Science Northeast Agricultural University Harbin China
| | - Lianzhou Jiang
- College of Food Science Northeast Agricultural University Harbin China
| | - Xiaonan Sui
- College of Food Science Northeast Agricultural University Harbin China
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Effect of triblock copolymers on the lipase catalytic behavior at the interface of conventional O/W emulsions. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.114178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Khamari L, Mukherjee S. Deciphering the Nanoconfinement Effect on the Folding Pathway of c-MYC Promoter-Based Intercalated-Motif DNA by Single-Molecule Förster Resonance Energy Transfer. J Phys Chem Lett 2022; 13:8169-8176. [PMID: 36005552 DOI: 10.1021/acs.jpclett.2c01893] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Intercalated-motif (i-motif) DNA formed by cytosine (C)-rich sequences has been considered a novel target in anticancer research. Interestingly, this type of noncanonical DNA structure is highly dynamic and can display several conformational polymorphisms based on the immediate surrounding environment. However, studies regarding the folding pathway of i-motifs having disease-specific sequences under a confined environment at physiological pH are relatively scarce. This thereby warrants more explorations that will decipher their structural and functional properties inside constrained media. Herein, using the single-molecule Förster Resonance Energy Transfer (smFRET) studies, for the first time, we have illustrated the conformational dynamics of c-MYC promoter-based i-motif structures at physiological pH inside microemulsions of different dimensions. We concluded that the folding of such motifs under confined space is not a direct transition between the random coil and i-motif conformations; rather it occurs through a partially folded intermediate, depending on the confined dimension.
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Affiliation(s)
- Laxmikanta Khamari
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462 066, Madhya Pradesh, India
| | - Saptarshi Mukherjee
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462 066, Madhya Pradesh, India
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Chen S, Li J, Fu Z, Wei G, Li H, Zhang B, Zheng L, Deng Z. Enzymatic Synthesis of β-Sitosterol Laurate by Candida rugosa Lipase AY30 in the Water/AOT/Isooctane Reverse Micelle. Appl Biochem Biotechnol 2020; 192:392-414. [DOI: 10.1007/s12010-020-03302-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 03/12/2020] [Indexed: 10/24/2022]
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Kuang L, Liu M, Lin Z, Zhu Y, Li J. The effect of single CNTs/GNPs and complexes on promoting the interfacial catalytic activity of lipase in conventional emulsions. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2020; 100:3192-3203. [PMID: 32105343 DOI: 10.1002/jsfa.10355] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 01/23/2020] [Accepted: 02/25/2020] [Indexed: 06/10/2023]
Abstract
BACKGROUND The interfacial activation mechanism of lipase enables it to exhibit high catalytic activity in water-in-oil (W/O) microemulsions. However, W/O microemulsions have obvious defects such as a small water pool and a large demand for surfactants. The present study investigated the substitutability of conventional oil-in-water (O/W) and W/O emulsions as lipase catalytic systems. Carbon nanotubes (CNTs)/gold nanoparticles (GNPs) or CNT-GNP electrostatically bonded complexes were added into the conventional emulsion system. RESULTS The simulated biphasic system and fluorescence study showed different and even contradictory results for the interfacial behavior of CNTs and CNT-GNP complexes due to the variation of the dispersibility of CNTs in cetyltrimethylammonium bromide (CTAB). Results also showed that conventional O/W emulsions were more suitable for lipase catalysis than conventional W/O emulsions. When CNTs or CNTCATB -GNP complexes were added in a conventional O/W emulsion system, the catalytic activity of lipase was significantly promoted (up to 4.8-fold using CNTs and 3.5-fold using CNTCATB -GNP complexes compared with free lipase). CONCLUSIONS The possible reason for this promotion may be due to the increase in the interface area. The current study was not only the latest exploration of lipase activity promotion via nanomaterials, but also explored a new lipase catalytic system and provides further insight into improving the catalytic performance of lipase in conventional emulsions. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Lei Kuang
- School of Food and Health, Beijing Technology and Business University, Beijing, China
- Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing, P.R. China
| | - Mengjie Liu
- School of Food and Health, Beijing Technology and Business University, Beijing, China
- Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing, P.R. China
| | - Zefeng Lin
- School of Food and Health, Beijing Technology and Business University, Beijing, China
- Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing, P.R. China
| | - Yunping Zhu
- School of Food and Health, Beijing Technology and Business University, Beijing, China
- Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing, P.R. China
| | - Jinlong Li
- School of Food and Health, Beijing Technology and Business University, Beijing, China
- Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing, P.R. China
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6
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Sun X, Bandara N. Applications of reverse micelles technique in food science: A comprehensive review. Trends Food Sci Technol 2019. [DOI: 10.1016/j.tifs.2019.07.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Jeon MS, Park KM, Yu H, Park JY, Chang PS. Effect of intense pulsed light on the deactivation of lipase: Enzyme-deactivation kinetics and tertiary structural changes by fragmentation. Enzyme Microb Technol 2019; 124:63-69. [PMID: 30797480 DOI: 10.1016/j.enzmictec.2019.02.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 11/20/2018] [Accepted: 02/01/2019] [Indexed: 11/19/2022]
Abstract
The effect of intense pulsed light (IPL) irradiation on Chromobacterium viscosum lipase was investigated with a primary focus on catalytic activity and molecular structure. During IPL irradiation, lipase activity decreased significantly with increasing pulse fluence (Fp) and exposure time (te). IPL-induced deactivation kinetics were further elucidated based on a two-step series-type deactivation model (constant deactivation rate k1 >k2). Fp was found to be the dominant variable affecting the degree of lipase deactivation, and residual activity was not associated with increasing te below a certain Fp energy density (2.66 mJ/cm2), implying a critical threshold for IPL-induced deactivation of lipase. From the results of fluorescence spectroscopy and sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE), we determined that IPL-induced deactivation was caused by fragmentation, leading to lipase tertiary structural changes. Furthermore, the results of FindPept analysis and matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) indicated that the internal sensitive bonds of lipase were cleaved preferentially by IPL, such that IPL irradiation induced site-sensitive fragmentation and peptide bond cleavage.
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Affiliation(s)
- Min-Sik Jeon
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826, Republic of Korea
| | - Kyung-Min Park
- Department of Food Science and Biotechnology, Wonkwang University, Iksan, 54538, Republic of Korea
| | - Hyunjong Yu
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826, Republic of Korea
| | - Jun-Young Park
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826, Republic of Korea
| | - Pahn-Shick Chang
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826, Republic of Korea; Center for Food and Bioconvergence, Seoul National University, Seoul, 08826, Republic of Korea; Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea.
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Zhao X, Zhang X, Liu H, Sun H. Optimization of AOT reversed micelle forward extraction of 7S globulin subunits from soybean proteins. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2018; 55:4909-4917. [PMID: 30482986 PMCID: PMC6233430 DOI: 10.1007/s13197-018-3425-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 09/09/2018] [Accepted: 09/11/2018] [Indexed: 10/28/2022]
Abstract
The work attempted to study on separating the α', α and β subunits of 7S globulin from soybean proteins by reverse micelles. The effects of six single factors (W0, time, temperature, pH, surfactant concentration and salt solution species) on three subunit partitioning were discussed. The main influence factors (time, temperature and surfactant concentration) were optimized by the response surface test (Box-Behnken design, three factor three level) in order to optimize the forward extracting three subunits of 7S globulin. It was observed that the independent factor had substantial effect on the forward extraction yield of three subunits of 7S globulin. The statistical analysis showed that the reverse micelles could significantly affect the forward extraction efficiency of protein subunits. The highest forward extraction efficiency of α', α and β subunits achieved 78.21, 63.65 and 61.34%, respectively. The proposed method also showed that the forward extraction efficiency of subunits with larger molecular weight was higher than low molecular weight.
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Affiliation(s)
- Xiaoyan Zhao
- Department of Food Science and Nutrition, Culinary Institute, University of Jinan, No. 13 Shungeng Road, Jinan, 250022 China
| | - Xiaowei Zhang
- Department of Food Science and Nutrition, Culinary Institute, University of Jinan, No. 13 Shungeng Road, Jinan, 250022 China
| | - Hongkai Liu
- Department of Food Science and Nutrition, Culinary Institute, University of Jinan, No. 13 Shungeng Road, Jinan, 250022 China
| | - Han Sun
- Department of Food Science and Nutrition, Culinary Institute, University of Jinan, No. 13 Shungeng Road, Jinan, 250022 China
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Fu Y, Liu Y, Fang Y, Qi X, Cao D. Physicochemical Characterization of Lecithin/Isopropyl Myristate Reverse Micelles. ChemistrySelect 2017. [DOI: 10.1002/slct.201701174] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yan Fu
- Department of Pharmaceutics, School of Pharmacy; Hebei Medical University; NO.361 Zhongshan East Road, Chang'an district ShiJiaZhuang, Hebei province 050017 PR China
| | - Yan Liu
- Department of Pharmaceutics, School of Pharmacy; Hebei Medical University; NO.361 Zhongshan East Road, Chang'an district ShiJiaZhuang, Hebei province 050017 PR China
| | - Yu Fang
- Department of Pharmaceutics, School of Pharmacy; Hebei Medical University; NO.361 Zhongshan East Road, Chang'an district ShiJiaZhuang, Hebei province 050017 PR China
| | - Xiaodan Qi
- Department of Pharmaceutics, School of Pharmacy; Hebei Medical University; NO.361 Zhongshan East Road, Chang'an district ShiJiaZhuang, Hebei province 050017 PR China
| | - Deying Cao
- Department of Pharmaceutics, School of Pharmacy; Hebei Medical University; NO.361 Zhongshan East Road, Chang'an district ShiJiaZhuang, Hebei province 050017 PR China
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Chen W, Guo W, Gao F, Chen L, Chen S, Li D. Phospholipase A1-Catalysed Synthesis of Docosahexaenoic Acid-Enriched Phosphatidylcholine in Reverse Micelles System. Appl Biochem Biotechnol 2017; 182:1037-1052. [DOI: 10.1007/s12010-016-2379-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 12/15/2016] [Indexed: 11/29/2022]
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Park KM, Lee JH, Hong SC, Kwon CW, Jo M, Choi SJ, Kim K, Chang PS. Selective production of 1-monocaprin by porcine liver carboxylesterase-catalyzed esterification: Its enzyme kinetics and catalytic performance. Enzyme Microb Technol 2015; 82:51-57. [PMID: 26672448 DOI: 10.1016/j.enzmictec.2015.08.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Revised: 08/04/2015] [Accepted: 08/21/2015] [Indexed: 10/23/2022]
Abstract
Porcine liver carboxylesterase (PLE) belongs to carboxylesterase family (EC 3.1.1.1) as a serine-type esterase. The PLE-catalyzed esterification of capric acid with glycerol in reverse micelles was investigated on the catalytic performance and enzyme kinetics. The most suitable structure of reverse micelles was comprised of isooctane (reaction medium) and bis(2-ethylhexyl) sodium sulfosuccinate (AOT, anionic surfactant) with 0.1 of R-value ([water]/[surfactant]) and 3.0 of G/F-value ([glycerol]/[fatty acid]) for the PLE-catalyzed esterification. In the aspect of regio-selectivity, the PLE mainly produced 1-monocaprin without any other products (di- and/or tricaprins of subsequent reactions). Furthermore, the degree of esterification at equilibrium state (after 4 h from the initiation) was 62.7% under the optimum conditions at pH 7.0 and 60 °C. Based on Hanes-Woolf plot, the apparent Km and Vmax values were calculated to be 16.44 mM and 38.91 μM/min/mg protein, respectively.
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Affiliation(s)
- Kyung-Min Park
- Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, Republic of Korea
| | - Jong-Hyuk Lee
- Research Institute of Food and Biotechnology, SPC group, Seoul 137-887, Republic of Korea
| | - Sung-Chul Hong
- Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, Republic of Korea
| | - Chang Woo Kwon
- Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, Republic of Korea
| | - Minje Jo
- Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, Republic of Korea
| | - Seung Jun Choi
- Department of Food Science and Technology, and Department of Interdisciplinary Bio IT Materials, Seoul National University of Science and Technology, Seoul 139-743, Republic of Korea
| | - Keesung Kim
- Institute of Advanced Machinery and Design, School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Republic of Korea
| | - Pahn-Shick Chang
- Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, Republic of Korea; Center for Food and Bioconvergence, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 151-742, Republic of Korea.
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