1
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Fu G, Zhao M, Wang X, Zheng Z, Shen S, Yan J, Li Q, Gao C, Dong X, Xiao J, Liu L. Effect of ultrasound-assisted pH-shifting treatment on the physicochemical properties of melon seed protein. ULTRASONICS SONOCHEMISTRY 2024; 110:107039. [PMID: 39197192 DOI: 10.1016/j.ultsonch.2024.107039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2024] [Revised: 08/16/2024] [Accepted: 08/20/2024] [Indexed: 09/01/2024]
Abstract
Melon seeds have received considerable attention in recent years because of their high protein content, but they have not yet been fully used. The modification of melon seed protein (MSP) using ultrasound-assisted pH-shifting treatment was investigated in this study by analyzing structural characteristics and functional properties. The particle size, free sulfhydryl content, surface hydrophobicity, solubility, secondary structure, water-holding capacity, oil-holding capacity, emulsification activity index, and emulsification stability index of MSP were determined. MSP treated with ultrasound-assisted, pH-shifting had a smaller particle size, lower free sulfhydryl content, higher surface hydrophobicity, and solubility increased from 43.67 % to 89.12 %. The secondary structure of MSP was affected by ultrasonic treatment, manifesting as an α-helix increase and β-helix, β-turn, and random coil content decrease, which may be the reason why the protein structure became more compact after treatment. The water and oil holding capacities of MSP increased from 2.74 g/g and 3.14 g/g in untreated samples to 3.19 g/g and 3.97 g/g for ultrasound-treated samples, and further increased to 3.97 g/g and 5.02 g/g for ultrasound-assisted, pH-shifting treatment at pH 9.0, respectively. The emulsification activity index of MSP was 21.11 m2/g before treatment and reached a maximum of 32.34 m2/g after ultrasound-assisted, pH-shifting treatment at pH 9.0. The emulsification stability of MSP was maximized by ultrasonic treatment at pH 7.0. Ultrasound-assisted, pH-shifting treatment can effectively improve the functional properties of MSP by modifying the protein structure, which improves the potential application of melon seed protein in the food industry.
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Affiliation(s)
- Guojun Fu
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China; Qingdao Special Food Research Institute, Qingdao 266109, China
| | - Man Zhao
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China; Qingdao Special Food Research Institute, Qingdao 266109, China
| | - Xinmiao Wang
- Advanced Agri-Tech Institute, Qingdao Agricultural University, Qingdao 266109, China
| | - Zehao Zheng
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China; Qingdao Special Food Research Institute, Qingdao 266109, China
| | - Shiyu Shen
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China; Qingdao Special Food Research Institute, Qingdao 266109, China
| | - Jiawen Yan
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China
| | - Qun Li
- College of Life Science and Technology, Xinjiang University, Urumqi 830000, China
| | - Chao Gao
- Key Laboratory of Trace Element Nutrition of National Health Commission, National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - Xuyan Dong
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China; Qingdao Special Food Research Institute, Qingdao 266109, China
| | - Junxia Xiao
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China; Qingdao Special Food Research Institute, Qingdao 266109, China
| | - Liang Liu
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China; Qingdao Special Food Research Institute, Qingdao 266109, China.
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2
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Huang X, Li Y, Cui C, Sun-Waterhouse D. Structural, functional properties, and in vitro digestibility of sunflower protein concentrate as affected by extraction method: Isoelectric precipitation vs ultrafiltration. Food Chem 2024; 439:138090. [PMID: 38043280 DOI: 10.1016/j.foodchem.2023.138090] [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: 07/24/2023] [Revised: 11/06/2023] [Accepted: 11/25/2023] [Indexed: 12/05/2023]
Abstract
This study was the first to compare the structural features, functional properties and in vitro digestibility of two protein concentrates produced from defatted sunflower meal via two different three-stage processes (chlorogenic acid removal-alkaline extraction-isoelectric precipitation versus chlorogenic acid removal-alkaline extraction-ultrafiltration; concentrates termed AI-SPC and AU-SPC, respectively). Compared with AI-SPC, AU-SPC with a darker brown color had much higher protein recovery yield and purity, much higher solubility at pH 4-7, higher oil-holding capacity, greater emulsifying and foaming capacities at pH 7 and 9, and slightly lower foaming capacity at pH 3. The bioavailability was higher for AU-SPC after oral-gastric-intestinal digestion. Moreover, AI-SPC occurred as clumps/lumps of particles, whilst AU-SPC appeared as flat blocks with continuous surfaces. AU-SPC was more negatively charged, and had a smaller particle size, less β-sheet, more β-turn, slightly more α-helix structure. These results confirmed the close relationship between protein production methods and its functional properties and digestibility.
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Affiliation(s)
- Xiaoling Huang
- School of Food Science and Engineering, South China University of Technology, Wushan Road 381, 510640 Guangzhou, Guangdong, China
| | - Yi Li
- School of Food Science and Engineering, South China University of Technology, Wushan Road 381, 510640 Guangzhou, Guangdong, China
| | - Chun Cui
- School of Food Science and Engineering, South China University of Technology, Wushan Road 381, 510640 Guangzhou, Guangdong, China.
| | - Dongxiao Sun-Waterhouse
- School of Chemical Sciences, The University of Auckland, Private Bag 92019, Auckland, New Zealand.
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3
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Nahimana P, Bouaicha I, Chèné C, Karamoko G, Missbah El Idrissi M, Bakhy K, Abdelmoumen H, Blecker C, Karoui R. Physico-chemical, functional, and structural properties of un-defatted, cold and hot defatted yellow lupin protein isolates. Food Chem 2024; 437:137871. [PMID: 37922794 DOI: 10.1016/j.foodchem.2023.137871] [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: 01/09/2023] [Revised: 10/20/2023] [Accepted: 10/25/2023] [Indexed: 11/07/2023]
Abstract
This study investigates the structure, physico-chemical and functional properties of yellow lupin isolate protein (YLPI) obtained by different processes (conventional wet and purely aqueous fractionation) from un-defatted (YLPIU), and hot (YLPIHD) and cold (YLPICD) defatted flour. The defatting process modified the physical, structural and functional characteristics of lupin protein isolates. Indeed, a decrease of α-helix, free sulfhydryl groups amount and an increase of disulfide bond levels were observed for defatted samples, improving their emulsifying stability. The defatting process exposes the hydrophobic groups present within the YLPI, which increases total sulfhydryl content and protein surface hydrophobicity. Hot and cold defatting induced a decrease in turbidity, water-holding capacity, oil adsorption capacity, tapped and poured bulk densities. In addition, the defatting process changed the particle size of protein isolates that induced changes in their viscosity. Tryptophan spectra and protein surface hydrophobicity indicated that YLPICD and YLPIHD underwent structural conformational change during the defatting process.
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Affiliation(s)
- Paterne Nahimana
- Univ. Artois, Univ. Lille, Univ. Littoral Côte d'Opale, Univ. Picardie Jules Verne, Univ. de Liège, INRAE, Junia, UMR-T 1158, BioEcoAgro, F-62300 Lens, France; Microbiology and Molecular Biology Team, Center of Plant and Microbial Biotechnology, Biodiversity and Environment, Faculty of Sciences, Mohammed V University in Rabat, 4, Av. Ibn Battouta, 1014 Rabat, Morocco
| | - Inès Bouaicha
- Univ. Artois, Univ. Lille, Univ. Littoral Côte d'Opale, Univ. Picardie Jules Verne, Univ. de Liège, INRAE, Junia, UMR-T 1158, BioEcoAgro, F-62300 Lens, France
| | - Christine Chèné
- Adrianor, 1 rue Jacquart, F-62217 Tilloy Les Mofflaines, France
| | - Gaoussou Karamoko
- Univ. Artois, Univ. Lille, Univ. Littoral Côte d'Opale, Univ. Picardie Jules Verne, Univ. de Liège, INRAE, Junia, UMR-T 1158, BioEcoAgro, F-62300 Lens, France
| | - Mustapha Missbah El Idrissi
- Microbiology and Molecular Biology Team, Center of Plant and Microbial Biotechnology, Biodiversity and Environment, Faculty of Sciences, Mohammed V University in Rabat, 4, Av. Ibn Battouta, 1014 Rabat, Morocco
| | - Khadija Bakhy
- National Institute of Agricultural Research (INRA), Research Unit on Aromatic and Medicinal Plant, BP 6570, Rabat-Instituts, Rabat 10101, Morocco
| | - Hanaa Abdelmoumen
- Microbiology and Molecular Biology Team, Center of Plant and Microbial Biotechnology, Biodiversity and Environment, Faculty of Sciences, Mohammed V University in Rabat, 4, Av. Ibn Battouta, 1014 Rabat, Morocco
| | - Christophe Blecker
- Laboratory of Food Science and Formulation, Gembloux Agro-Bio Tech, Université de Liège, Passage des Déportés 2, Gembloux B-5030, Belgium
| | - Romdhane Karoui
- Univ. Artois, Univ. Lille, Univ. Littoral Côte d'Opale, Univ. Picardie Jules Verne, Univ. de Liège, INRAE, Junia, UMR-T 1158, BioEcoAgro, F-62300 Lens, France.
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4
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Chen J, Cai L, Huang X, Fu H, Sun L, Yuan C, Gong H, Lyu B, Wang Z, Yu H. Mathematical modeling of optimal coagulant dosage for tofu preparation using MgCl 2. Food Chem X 2024; 21:101137. [PMID: 38304048 PMCID: PMC10831496 DOI: 10.1016/j.fochx.2024.101137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 01/11/2024] [Accepted: 01/11/2024] [Indexed: 02/03/2024] Open
Abstract
To explore the association between the optimal coagulant for tofu and the components of soybeans,30 different kinds of soybeans were selected, and tested for their optimal coagulant MgCl2 content. The optimal amount of coagulant was taken as the dependent variable, and the soybean Composition were taken as independent variables for the correlation analysis. The results showed that there was a positive correlation between the optimal coagulant content and the content of histidine, 7S β-conglycinin, B1aB1bB2B3B4 of 11 s glycincin, and α'-subunit of 7S β-conglycinin, negative correlation with lysine. The regression formula is y = -1.186 + 3.457*B1aB1bB2B3B4 + 2.304*7S + 0.351*histidine - 0.084*lysine + 4.696*α', and the model is validated to be within 10 % of the error value and has a high degree of confidence. This study provides theoretical support for realizing the green production of traditional soybean products.
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Affiliation(s)
- Jian Chen
- College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China
- Division of Soybean Processing, Soybean Research & Development Center, Chinese Agricultural Research System, Changchun 130118, China
| | - Lei Cai
- College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China
- Division of Soybean Processing, Soybean Research & Development Center, Chinese Agricultural Research System, Changchun 130118, China
| | - Xiaolong Huang
- College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China
- Division of Soybean Processing, Soybean Research & Development Center, Chinese Agricultural Research System, Changchun 130118, China
| | - Hongling Fu
- College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China
- Division of Soybean Processing, Soybean Research & Development Center, Chinese Agricultural Research System, Changchun 130118, China
| | - Ling Sun
- Institute of Plant Protection, Jilin Academy of Agriculture Sciences, Changchun 130024, China
| | - Changwei Yuan
- College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China
| | - Hao Gong
- College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China
- Division of Soybean Processing, Soybean Research & Development Center, Chinese Agricultural Research System, Changchun 130118, China
| | - Bo Lyu
- College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China
- Division of Soybean Processing, Soybean Research & Development Center, Chinese Agricultural Research System, Changchun 130118, China
| | - Zhaohui Wang
- College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China
| | - Hansong Yu
- College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China
- Division of Soybean Processing, Soybean Research & Development Center, Chinese Agricultural Research System, Changchun 130118, China
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5
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Kong Y, Sun L, Wu Z, Li Y, Kang Z, Xie F, Yu D. Effects of ultrasonic treatment on the structural, functional properties and beany flavor of soy protein isolate: Comparison with traditional thermal treatment. ULTRASONICS SONOCHEMISTRY 2023; 101:106675. [PMID: 37925914 PMCID: PMC10656237 DOI: 10.1016/j.ultsonch.2023.106675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 10/24/2023] [Accepted: 10/30/2023] [Indexed: 11/07/2023]
Abstract
This research explored the influences of ultrasonic and thermal treatments on the structure, functional properties, and beany flavor of soy protein isolate (SPI). In comparison with traditional thermal treatment, ultrasonic treatment effectively induced protein structural unfolding and exposure of hydrophobic groups, which reduced relative content of α-helix, increased relative content of β-turn, β-sheet and random coil, and improved the solubility, emulsifying and foaming properties of SPI. Both treatments significantly decreased the species and contents of flavor compounds, such as hexanal, (E)-2-nonenal, (Z)-2-heptenal and (E)-2-hexenal in SPI. The relative content of hexanal in the major beany flavor compound decreased from 11.69% to 6.13% and 5.99% at 350 W ultrasonic power and 150 s thermal treatment procedure, respectively. After ultrasonic treatment, structural changes in SPI were significantly correlated with functional properties but showed a weak correlation with flavor. Conversely, the opposite trend was observed for thermal treatment. Thus, using ultrasonic treatment to induce and stabilise the denatured state of proteins is feasible to improve the functional properties and beany flavor of SPI.
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Affiliation(s)
- Yue Kong
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Lina Sun
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Zenan Wu
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Yanhui Li
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Zimeng Kang
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Fengying Xie
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China.
| | - Dianyu Yu
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China.
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6
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Xu Y, Sun L, Zhuang Y, Gu Y, Cheng G, Fan X, Ding Y, Liu H. Protein-Stabilized Emulsion Gels with Improved Emulsifying and Gelling Properties for the Delivery of Bioactive Ingredients: A Review. Foods 2023; 12:2703. [PMID: 37509795 PMCID: PMC10378947 DOI: 10.3390/foods12142703] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 07/04/2023] [Accepted: 07/11/2023] [Indexed: 07/30/2023] Open
Abstract
In today's food industry, the potential of bioactive compounds in preventing many chronic diseases has garnered significant attention. Many delivery systems have been developed to encapsulate these unstable bioactive compounds. Emulsion gels, as colloidal soft-solid materials, with their unique three-dimensional network structure and strong mechanical properties, are believed to provide excellent protection for bioactive substances. In the context of constructing carriers for bioactive materials, proteins are frequently employed as emulsifiers or gelling agents in emulsions or protein gels. However, in emulsion gels, when protein is used as an emulsifier to stabilize the oil/water interface, the gelling properties of proteins can also have a great influence on the functionality of the emulsion gels. Therefore, this paper aims to focus on the role of proteins' emulsifying and gelling properties in emulsion gels, providing a comprehensive review of the formation and modification of protein-based emulsion gels to build high-quality emulsion gel systems, thereby improving the stability and bioavailability of embedded bioactive substances.
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Affiliation(s)
- Yuan Xu
- Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Liping Sun
- Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Yongliang Zhuang
- Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Ying Gu
- Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Guiguang Cheng
- Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Xuejing Fan
- Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Yangyue Ding
- Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Haotian Liu
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
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7
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Hu Z, Wang Y, Ma Z, Cheng T, Guo Z, Zhou L, Wang Z. Impacts of Industrial Modification on the Structure and Gel Features of Soy Protein Isolate and its Composite Gel with Myofibrillar Protein. Foods 2023; 12:foods12101982. [PMID: 37238801 DOI: 10.3390/foods12101982] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 05/10/2023] [Accepted: 05/11/2023] [Indexed: 05/28/2023] Open
Abstract
Native soy protein isolate (N-SPI) has a low denaturation point and low solubility, limiting its industrial application. The influence of different industrial modification methods (heat (H), alkaline (A), glycosylation (G), and oxidation (O)) on the structure of SPI, the properties of the gel, and the gel properties of soy protein isolate (SPI) in myofibril protein (MP) was evaluated. The study found that four industrial modifications did not influence the subunit composition of SPI. However, the four industrial modifications altered SPI's secondary structure and disulfide bond conformation content. A-SPI exhibits the highest surface hydrophobicity and I850/830 ratio but the lowest thermal stability. G-SPI exhibits the highest disulfide bond content and the best gel properties. Compared with MP gel, the addition of H-SPI, A-SPI, G-SPI, and O-SPI components significantly improved the properties of the gel. Additionally, MP-ASPI gel exhibits the best properties and microstructure. Overall, the four industrial modification effects may impact SPI's structure and gel properties in different ways. A-SPI could be a potential functionality-enhanced soy protein ingredient in comminuted meat products. The present study results will provide a theoretical basis for the industrialized production of SPI.
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Affiliation(s)
- Zhaodong Hu
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
- College of Food and Health, Beijing Technology and Business University, Beijing 100048, China
| | - Yichang Wang
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Zihan Ma
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Tianfu Cheng
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Zengwang Guo
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Linyi Zhou
- College of Food and Health, Beijing Technology and Business University, Beijing 100048, China
| | - Zhongjiang Wang
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
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8
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Song H, Zhong M, Sun Y, Yue Q, Qi B. Ultrasound-assisted alkali removal of proteins from wastewater generated during oil bodies extraction. ULTRASONICS SONOCHEMISTRY 2023; 96:106436. [PMID: 37172539 DOI: 10.1016/j.ultsonch.2023.106436] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 04/24/2023] [Accepted: 05/04/2023] [Indexed: 05/15/2023]
Abstract
In this study, an ultrasonic-assisted alkaline method was used to remove proteins from wastewater generated during oil-body extraction, and the effects of different ultrasonic power settings (0, 150, 300, and 450 W) on protein recovery were investigated. The recoveries of the ultrasonically treated samples were higher than those of the samples without ultrasonic treatment, and the protein recoveries increased with increasing power, with a protein recovery of 50.10 % ± 0.19 % when the ultrasonic power was 450 W. Amino acid analysis showed that the amino acids comprising the recovered samples were consistent, regardless of the ultrasonic power used, but significant differences in the contents of amino acids were observed. No significant changes were observed in the protein electrophoretic profile using dodecyl polyacrylamide gel, indicating that sonication did not change the primary structures of the recovered samples. Fourier transform infrared and fluorescence spectroscopy revealed that the molecular structures of the samples changed after sonication, and the fluorescence intensity increased gradually with increasing sonication power. The contents of α-helices and random coils obtained at an ultrasonic power of 450 W decreased to 13.44 % and 14.31 %, respectively, whereas the β-sheet content generally increased. The denaturation temperatures of the proteins were determined using differential scanning calorimetry, and ultrasound treatment reduced the denaturation temperatures of the samples, which was associated with the structural and conformational changes caused by their chemical bonding. The solubility of the recovered protein increased with increasing ultrasound power, and a high solubility was essential in good emulsification. The emulsification of the samples was improved well. In conclusion, ultrasound treatment changed the structure and thus improved the functional properties of the protein.
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Affiliation(s)
- Hanyu Song
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Mingming Zhong
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Yufan Sun
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Qiang Yue
- Heilongjiang Open University, Harbin, Heilongjiang 150030, China.
| | - Baokun Qi
- College of Food Science, Northeast Agricultural University, Harbin 150030, China.
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9
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Song Y, Huang D, Guo W, Gao Y, Xue F, Xiong X, Li C. Physicochemical and Structural Properties of Gluten-Konjac glucomannan Conjugates Prepared by Maillard Reaction. Polymers (Basel) 2023; 15:polym15030631. [PMID: 36771931 PMCID: PMC9921320 DOI: 10.3390/polym15030631] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 01/19/2023] [Accepted: 01/23/2023] [Indexed: 01/28/2023] Open
Abstract
Gluten (Glu) is important to wheat products by forming a three-dimensional matrix. This study aimed to investigate the physicochemical and structural properties of gluten after conjugation with konjac glucomannan (KGM) through the Maillard reaction. The study revealed that the degree of graft increased with the prolonged reaction time. The Glu-KGM conjugates were possessed of increased β-sheet but decreased α-helix and β-turn, as well as unfolding and loose tertiary structures as the reaction proceeded. Among three different proportions, the Glu-KGM 1:1 conjugate was proved to have the most excellent foaming and emulsifying properties, and could form more rigid and firm gelation structures, which could be related to the decreased particle size and increased zeta potential of the conjugate. Overall, the physicochemical and structural properties of gluten were significantly related to the KGM ratios as well as the reaction period.
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Affiliation(s)
- Yukang Song
- College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China
| | - Danping Huang
- Nanjing Station of National Light Industry Food Quality Supervision and Inspection, Nanjing 211816, China
| | - Wanchun Guo
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Yiqing Gao
- College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China
| | - Feng Xue
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Xiaohui Xiong
- College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China
| | - Chen Li
- College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China
- Correspondence: ; Tel.: +86-138-13362715
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10
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Song H, Zhong M, Sun Y, Li Y, Qi B. Recovery of proteins from soybean oil-body wastewater at various pH levels and their structural and functional characterization. Lebensm Wiss Technol 2023. [DOI: 10.1016/j.lwt.2023.114455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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11
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Guo Y, Zhang ZG, Cai J, Li WR, Chen LY, Wu WC. Co-folding of soy protein isolates and shellac by structural interplays to induce hydrogels. Food Hydrocoll 2023. [DOI: 10.1016/j.foodhyd.2023.108527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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12
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Yang S, Lian Z, Wang M, Liao P, Wu H, Cao J, Tong X, Tian T, Wang H, Jiang L. Molecular structural modification of β-conglycinin using pH-shifting with ultrasound to improve emulsifying properties and stability. ULTRASONICS SONOCHEMISTRY 2022; 90:106186. [PMID: 36201932 PMCID: PMC9535325 DOI: 10.1016/j.ultsonch.2022.106186] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 09/21/2022] [Accepted: 09/28/2022] [Indexed: 05/07/2023]
Abstract
This present work underlines the effect of pH-shifting at pH 2 and pH 12 individually or combined with ultrasound treatment to modify the molecular structure of β-conglycinin (7S) on its emulsifying properties and stability. Fourier transform infrared (FTIR) spectroscopy and intrinsic fluorescence spectroscopy showed that pH-shifting improves the molecular structure of 7S, while ultrasound further promotes structural changes. In particular, the pH-shifting at pH 12 combined with ultrasound treatment (U-7S-12) resulted in more significant changes than the pH-shifting at pH 2 combined with ultrasound (U-7S-2). U-7S-12 showed a significant reduction in protein particle size from 152 to 34.77 nm and a relatively smooth protein surface compared to 7S. The protein had the highest surface hydrophobicity and flexibility at 81,560.0 and 0.45, respectively, and the free sulfhydryl content from 1.57 to 2.02 μmol/g. In addition, we characterized the emulsions prepared after 7S treatment. The single or combined treatment increased the interfacial protein adsorption of the samples, which showed lower viscosity and shear stress compared to 7S. The U-7S-12 emulsion exhibited the highest emulsifying properties and was more stable than other emulsions under creaming, heating, and freeze-thaw conditions. In summary, the concerted action of pH-shifting and ultrasound can modify the structure, and combined alkaline pH-shifting and ultrasound treatment can further improve the emulsifying properties and stability of 7S.
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Affiliation(s)
- Sai Yang
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Ziteng Lian
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Mengmeng Wang
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Peilong Liao
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Haibo Wu
- College of Food Engineering, Beibu Gulf University, Qinzhou 535011, China
| | - Jia Cao
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Xiaohong Tong
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Tian Tian
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Huan Wang
- College of Food Science, Northeast Agricultural University, Harbin 150030, China.
| | - Lianzhou Jiang
- College of Food Science, Northeast Agricultural University, Harbin 150030, China.
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13
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Huang L, Jia S, Wu R, Chen Y, Ding S, Dai C, He R. The structure, antioxidant and antibacterial properties of thiol-modified soy protein isolate induced by allicin. Food Chem 2022; 396:133713. [PMID: 35868284 DOI: 10.1016/j.foodchem.2022.133713] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 06/23/2022] [Accepted: 07/12/2022] [Indexed: 11/04/2022]
Abstract
This study investigated the effect of allicin binding on the structure, antioxidant and antibacterial properties of soy protein isolate (SPI). Results showed that allicin bound to 82.6 % free thiol groups of SPI at a molar ratio of 0.5. The combination of allicin and SPI significantly affected the structure of protein. Result of circular dichroism showed that the content of α-helix decreased by 26.9 % and the content of β-sheet increased by 12.2 % over control when the molar ratio was 0.5. The result of surface hydrophobicity signified the unfolding of SPI with the action of allicin. These results implied that allicin binding might be a suitable method for the modification of SPI. Furthermore, the antibacterialand antioxidant experiments indicated that allicin-SPI conjugates not only had the capacity to inhibit the growth of Escherichia coli and Staphyloccocus aureus, but also had DPPH and ABTS radicals scavenging activities.
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Affiliation(s)
- Liurong Huang
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China; Institute of Food Physical Processing, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China.
| | - Shifang Jia
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China
| | - Ruike Wu
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China
| | - Yanyue Chen
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China
| | - Shuang Ding
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China
| | - Chunhua Dai
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China; Institute of Food Physical Processing, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China
| | - Ronghai He
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China; Institute of Food Physical Processing, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China
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14
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Tian T, Ren K, Tong X, Peng X, Lian Z, Lyu B, Du M, Wang H, Jiang L. Co-precipitates proteins prepared by soy and wheat: Structural characterisation and functional properties. Int J Biol Macromol 2022; 212:536-546. [PMID: 35618093 DOI: 10.1016/j.ijbiomac.2022.05.149] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Revised: 05/05/2022] [Accepted: 05/20/2022] [Indexed: 11/05/2022]
Abstract
Co-precipitation was a novel method for improving the functional properties of pure proteins. To investigate the mechanism of this effect, different protein proportions of soy-wheat co-precipitated protein were extracted by isoelectric point co-precipitation. Soy protein isolate (SPI) was mainly linked to wheat protein (WP) through non-covalent forces and disulfide bonds as determined by circular dichroism spectroscopy, disulfide bond, protein fraction extraction, interaction, and molecular modeling. Amino acid analysis indicated that co-precipitation could increase wheat lysine content. Furthermore, co-precipitation improved multiple functional properties of pure protein, and the emulsifying and foaming properties of the composite system with a mass ratio of 7:3 outperformed those of other systems. At the same time, correlation analysis revealed that protein structure and intermolecular forces significantly affected its functional properties. This study provided some useful and interesting information for the development and application of protein-protein systems with diverse functional properties.
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Affiliation(s)
- Tian Tian
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Kunyu Ren
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Xiaohong Tong
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Xinhui Peng
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Ziteng Lian
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Bo Lyu
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Mengyu Du
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Huan Wang
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Key Laboratory of Soybean Biology of Chinese Education Ministry, Harbin, Heilongjiang 150030, China; Heilongjiang Beidahuang Green Health Food Co. Ltd., Jiamusi, Heilongjiang 154000, China.
| | - Lianzhou Jiang
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei, Anhui 230036, China.
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