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Liu X, Shi Y, Wang M, Adhikari B, Xue F. Covalent conjugation of hemp protein isolates with curcumin via ultrasound to improve its structural and functional properties. Food Chem 2025; 482:144096. [PMID: 40187321 DOI: 10.1016/j.foodchem.2025.144096] [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: 12/27/2024] [Revised: 03/18/2025] [Accepted: 03/27/2025] [Indexed: 04/07/2025]
Abstract
This study investigated the covalent conjugation of hemp protein isolate (HPI) with curcumin induced by ultrasound-generated free radicals and its impact on HPI's structural and functional properties. Ultrasound treatment unfolded the protein structure, increased free amino and sulfhydryl groups, and altered the secondary structure. Curcumin addition enhanced free radical scavenging capacity. Conjugation with curcumin significantly improved emulsifying activity index (+ 2.6-fold), foam stability (+ 1.8-fold), and solubility (+ 0.9-fold) and further enhanced free radical scavenging capability (+ 2.4 or 2.7-fold). Conjugation with curcumin also enabled gel formation, as evidenced by a continuous increase in the storage modulus of HPI during heating and cooling. These findings highlight the potential of HPI-curcumin conjugates as healthy ingredients in functional food applications.
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Affiliation(s)
- Xinye Liu
- Institute of Agricultural Facilities and Equipment, Jiangsu Academy of Agricultural Sciences (JAAS), Nanjing 210014, China
| | - Yuchen Shi
- School of Science, RMIT University, Melbourne, VIC 3083, Australia
| | - Mengzhi Wang
- Jiangsu Key Laboratory of Medicinal Substance and Utilization of Fresh Chinese Medicine, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Benu Adhikari
- School of Science, RMIT University, Melbourne, VIC 3083, Australia
| | - Feng Xue
- Jiangsu Key Laboratory of Medicinal Substance and Utilization of Fresh Chinese Medicine, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China.
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2
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Zhi M, Xie Y, Li H, Deng Z, Peng H, Yu Y, Zhang B. TGase-induced crosslinking of mulberry leaf protein particles as stabilizer of high-internal-phase Pickering emulsions: characterization and stability. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2025; 105:4388-4399. [PMID: 40022672 DOI: 10.1002/jsfa.14196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2024] [Revised: 01/07/2025] [Accepted: 01/25/2025] [Indexed: 03/03/2025]
Abstract
BACKGROUND Mulberry leaf protein (MLP) is a high-quality protein with significant nutritional value and functional properties. Enzymatic modification of proteins can enhance their functional properties by using proteases to covalently crosslink or hydrolyze proteins. This study investigates the potential of transglutaminase (TGase)-induced crosslinked MLP as an emulsifier in the formation of high-internal-phase Pickering emulsions. RESULTS Crosslinked MLP samples were prepared with TGase concentrations ranging from 0 to 25 U g-1. High-internal-phase Pickering emulsions (80% v/v) were formed at pH 8, with a crosslinking temperature of 50 °C, a TGase concentration of 20 U g-1 and an optimal crosslinking time of 60 min. As the enzyme concentration increased, the content of exposed sulfhydryl groups progressively increased, while the total free sulfhydryl content remained relatively stable. After varying crosslinking durations, both total free and exposed sulfhydryl group contents initially increased before declining. Additionally, the content of free amino groups in MLP gradually decreased with higher enzyme dosages and longer crosslinking times. The surface hydrophobicity of crosslinked MLP increased initially, followed by a decrease, reflecting changes in the spatial structure of MLP. SDS-PAGE analysis confirmed the formation of polymer masses after TGase-catalyzed crosslinking. Under optimal crosslinking conditions, the high-internal-phase Pickering emulsion prepared with TGase-induced crosslinked MLP exhibited a relatively uniform droplet distribution. CONCLUSION TGase-induced crosslinking enhances both the emulsifying activity and stability of MLP emulsions. © 2025 Society of Chemical Industry.
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Affiliation(s)
- Mingze Zhi
- State Key Laboratory of Food Science and Resource, Nanchang University, Nanchang, China
| | - Yingshan Xie
- State Key Laboratory of Food Science and Resource, Nanchang University, Nanchang, China
| | - Hongyan Li
- State Key Laboratory of Food Science and Resource, Nanchang University, Nanchang, China
| | - Zeyuan Deng
- State Key Laboratory of Food Science and Resource, Nanchang University, Nanchang, China
| | - Han Peng
- Department of Food Science and Technology, University of California, Davis, CA, USA
| | - Yanfang Yu
- Jiangxi Cash Crops Institute, Nanchang, China
| | - Bing Zhang
- State Key Laboratory of Food Science and Resource, Nanchang University, Nanchang, China
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Dur S, Mir NA, Ganaie TA. Controlled ethanol-mediated polyphenol removal from sunflower meal: Impact on physicochemical, structural, flow-behavior, and functional characteristics of isolated proteins. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2025; 105:1385-1397. [PMID: 39324374 DOI: 10.1002/jsfa.13928] [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: 04/18/2024] [Revised: 09/02/2024] [Accepted: 09/15/2024] [Indexed: 09/27/2024]
Abstract
BACKGROUND Polyphenols present in sunflower meal act on sunflower proteins by reacting directly with their structures and thus influencing their purity, solubility, crystallinity, and functionality. However, the effect on these properties of varying concentrations of ethanol used in dephenolization has yet to be explored. The present study aimed to explore the impact of dephenolization using varying ethanol concentrations (60%, 70%, 80%, and 90%) on the physicochemical, color, thermal, structural, functional, and flow behavior of protein isolates extracted from sunflower meal. RESULTS Protein isolates originating from meals that were dephenolized using higher ethanol concentrations exhibited a protein content of 836.10 g kg-1. As the concentration of ethanol increased, a reduction in crystallinity was observed from 24% to 14.15%. Fourier transform infrared (FTIR) spectroscopy revealed marked shifts in major peaks within the 1600 to 1700 cm-1 wavelength range, indicating significant structural and conformational changes. Sodium dodecyl-sulfate polyacrylamide gel electrophoresis (SDS-PAGE) results demonstrated that dephenolization caused decline in molecular weight ranging from 25 kDa to 60 kDa. Dephenolization induced significant changes in surface morphology resulting in more heterogeneous and disordered surfaces as indicated by field emission-scanning electron microscopy (FE-SEM) micrographs. Overall improvement in the functional properties was observed, with an increase in solubility from 15.20% to 22.03%. Improvement in the flow behavior with an increase in porosity from 38% to 60% was also observed, due to dephenolization. CONCLUSION Dephenolization using 90% ethanol induced structural changes that enhanced physicochemical and functional characteristics of sunflower protein isolates by improving purity and solubility, reducing crystallinity, and increasing flow behavior. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Sadaf Dur
- Department of Food Technology, School of Engineering and Technology, Islamic University of Science and Technology, Awantipora, India
| | - Nisar A Mir
- Department of Food Technology, School of Engineering and Technology, Islamic University of Science and Technology, Awantipora, India
| | - Tariq Ahmad Ganaie
- Department of Food Technology, School of Engineering and Technology, Islamic University of Science and Technology, Awantipora, India
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4
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Cao R, Wang B, Bai T, Zhu Y, Cheng J, Zhang J. Structural and functional impacts of glycosylation-induced modifications in rabbit myofibrillar proteins. Int J Biol Macromol 2024; 283:137583. [PMID: 39577516 DOI: 10.1016/j.ijbiomac.2024.137583] [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: 09/26/2024] [Revised: 11/05/2024] [Accepted: 11/11/2024] [Indexed: 11/24/2024]
Abstract
Rabbit meat, recognized for its nutritional value, is gaining global attention. However, the inferior functional properties of rabbit myofibrillar proteins lead to quality degradation during the production process. Glycosylation represents an effective method for enhancing protein functionality. This study investigated the glycosylation modification of rabbit myofibrillar proteins. The results demonstrated that solubility of glucose-glycosylated products increased by 34 %, while the reduction capacity improved from 0.15 mg/mL to 1.6 mg/mL. The·OH free radical scavenging ability increased from 63.94 % to 94.21 %. β-Glucan-glycosylated products exhibited the highest thermal stability, and their DPPH free radical scavenging rate increased from 19.68 % to 76.21 %. Glycosylation also induced changes in protein conformation, characterized by a 10-30 °C increase in thermal denaturation peak temperature, gradual attenuation of endogenous fluorescence intensity, gradual enhancement of λmax redshift, and a 30-40 % decrease in surface hydrophobicity. Molecular docking simulations revealed that the primary interactions between glucose, lactose, and β-Glucan with myofibrillar proteins involve hydrogen bonds and van der Waals forces. In conclusion, glycosylation can effectively improve the functional properties of proteins, contributing to the development and production of high-quality, stable, and nutritious rabbit meat products.
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Affiliation(s)
- Ruiqi Cao
- Meat Processing Key Laboratory of Sichuan Province, College of Food and Biological Engineering, Chengdu University, Chengdu 610106, PR China
| | - Bangxu Wang
- Meat Processing Key Laboratory of Sichuan Province, College of Food and Biological Engineering, Chengdu University, Chengdu 610106, PR China
| | - Ting Bai
- Meat Processing Key Laboratory of Sichuan Province, College of Food and Biological Engineering, Chengdu University, Chengdu 610106, PR China
| | - Yan Zhu
- Chongqing General Station of Animal Husbandry Technology Extension, Chongqing 401331, PR China
| | - Jie Cheng
- Meat Processing Key Laboratory of Sichuan Province, College of Food and Biological Engineering, Chengdu University, Chengdu 610106, PR China.
| | - Jiamin Zhang
- Meat Processing Key Laboratory of Sichuan Province, College of Food and Biological Engineering, Chengdu University, Chengdu 610106, PR China.
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Wei G, Tao J, Fu X, Wang D, Dong X, Huang A. Insights into the effect of complex phosphates on acid-induced milk fan gel properties: Texture, rheological, microstructure, and molecular forces. J Dairy Sci 2024; 107:9054-9073. [PMID: 38762104 DOI: 10.3168/jds.2024-24737] [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: 01/31/2024] [Accepted: 03/27/2024] [Indexed: 05/20/2024]
Abstract
Milk fan cheese, a type of stretched cheese, presents challenges in its stretch forming. This study investigated the effects of complex phosphates (sodium tripolyphosphate and sodium dihydrogen phosphate, STPP-DSP) on the gelling properties of acid-induced milk fan gel and the mechanisms contributing to its stretch forming. The treatment of milk fan gel with STPP-DSP resulted in improved functional and textural properties compared with the control group. In particular, drawing length increased significantly from 69.67 nm to 80.33 nm, and adhesiveness increased from 1,737.89 g/mm to 1,969.79 g/mm. The addition of STPP-DSP also led to increased viscosity, elastic modulus (G'), and viscous modulus (G″). Microstructural analysis revealed the formation of a fibrous structure within the gel after STPP-DSP treatment, facilitating uniform embedding of fat globules and emulsification. Structural analysis showed that the addition of STPP-DSP increased β-fold and decreased random coiling of the gel, facilitating the unfolding of protein structures. Additionally, UV absorption spectroscopy and excitation emission matrix spectroscopy results indicated the formation of a chelate between STPP-DSP and milk fan gel, increasing protein-protein molecular interactions. Evidence from differential scanning calorimetry and X-ray diffraction demonstrated the formation of sodium caseinate chelate. Fourier transform infrared spectroscopy and zeta potential analysis revealed that the sodium caseinate chelate formed through hydrophobicity, hydrogen bonding, and electrostatic forces. These findings provided theoretical insights into how phosphates can improve the stretch forming of milk fan gel, facilitating the application of phosphate additives in stretched-cheese processing.
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Affiliation(s)
- Guangqiang Wei
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, Yunnan, China
| | - Jifang Tao
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, Yunnan, China
| | - Xiaoping Fu
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, Yunnan, China
| | - Daodian Wang
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, Yunnan, China
| | - Xiaozhu Dong
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, Yunnan, China
| | - Aixiang Huang
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, Yunnan, China..
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Ji Y, Wang R, Wang Y, Tan D, Wang Y, Wu Y, Cui H, Zhang Y, Wang S. Thermal-induced interactions between soy protein isolate and malondialdehyde: Effects on protein digestibility, structure, and formation of advanced lipoxidation end products. Food Res Int 2024; 196:115075. [PMID: 39614563 DOI: 10.1016/j.foodres.2024.115075] [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: 06/20/2024] [Revised: 08/25/2024] [Accepted: 09/09/2024] [Indexed: 12/01/2024]
Abstract
Thermally processed lipid- and protein-rich foods have sparked widespread concern since they may degrade food nutrition and even risk food safety. This study investigated soy protein isolate (SPI) alterations of digestibility and structure, as well as the formation of potentially hazardous chemicals, i.e., advanced lipoxidation end products (ALEs), after interacting with malondialdehyde (MDA, a lipid oxidation product) under high-temperature cooking conditions (100-180 °C, up to 60 min). In-vitro protein digestion of the SPI-MDA mixtures suggested that their room-temperature interactions damaged SPI digestibility, and increasing the temperature and the duration of the thermal treatment exacerbated the adverse effects. Protein oxidation, covalent aggregation of subunits, and changes in secondary and tertiary structures were revealed using thiol quantification, gel electrophoresis, fluorescence spectroscopy, and circular dichroism (CD) spectra, which could explain reduced protein digestibility. High-resolution mass spectrometry (HRMS) identified seven non-crosslinked ALEs and two crosslinked ALEs. Increased MDA concentrations promoted the generation of ALEs. Moreover, the acrolein-derived ALEs with reactive carbonyl groups were prone to further reacting into crosslinked ALEs, potentially responsible for the subunit aggregation.
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Affiliation(s)
- Yazhou Ji
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin 300071, China
| | - Ruican Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin 300071, China
| | - Yuanyifei Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin 300071, China
| | - Dongfei Tan
- Institute of Agro-product Safety and Nutrition, Tianjin Academy of Agricultural Sciences (TAAS), Tianjin 300192, China
| | - Yaya Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin 300071, China
| | - Yuekun Wu
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin 300071, China
| | - Haoxin Cui
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin 300071, China
| | - Yan Zhang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin 300071, China
| | - Shuo Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin 300071, China.
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7
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Yu H, Cheng X, Li H, Du Q, Zeng X, Wu Z, Guo Y, Pan D. Effects and improvement mechanisms of ultrasonic pretreatment on the quality of fermented skim milk. ULTRASONICS SONOCHEMISTRY 2024; 108:106958. [PMID: 38889569 PMCID: PMC11231593 DOI: 10.1016/j.ultsonch.2024.106958] [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: 04/13/2024] [Revised: 06/07/2024] [Accepted: 06/14/2024] [Indexed: 06/20/2024]
Abstract
Fermented skim milk is an ideal food for consumers such as diabetic and obese patients, but its low-fat content affects its texture and viscosity. In this study, we developed an effective pretreatment method for fermented skim milk using low-frequency ultrasound (US), and investigated the molecular mechanism of the corresponding quality improvement. The skim milk samples were treated by optimal ultrasonication conditions (336 W power for 7 min at 3 °C), which improved the viscosity, water-holding capacity, sensory attributes, texture, and microstructure of fermented skim milk (P < 0.05). Further mechanistic analyses revealed that the US treatment enhanced the exposure of fluorescent amino acids within proteins, facilitating the cross-linking between casein and whey. The increased surface hydrophobicity of fermented milk indicates that the US treatment led to the exposure of hydrophobic amino acid residues inside proteins, contributing to the formation of a denser gel network; the average particle size of milk protein was reduced from 24.85 to 18.06 µm, which also contributed to the development of a softer curd texture. This work is the first attempt to explain the effect of a low-frequency ultrasound treatment on the quality of fermented skim milk and discuss the molecular mechanism of its improvement.
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Affiliation(s)
- Hongsen Yu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Insititute of Plant Virology, Ningbo University, Ningbo, China; Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, College of Food Science and Engineering, Ningbo University, Ningbo, China; Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, Ningbo University, Ningbo, China
| | - Xinyue Cheng
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Insititute of Plant Virology, Ningbo University, Ningbo, China; Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, College of Food Science and Engineering, Ningbo University, Ningbo, China; Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, Ningbo University, Ningbo, China
| | - Hang Li
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Insititute of Plant Virology, Ningbo University, Ningbo, China; Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, College of Food Science and Engineering, Ningbo University, Ningbo, China; Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, Ningbo University, Ningbo, China
| | - Qiwei Du
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Insititute of Plant Virology, Ningbo University, Ningbo, China; Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, College of Food Science and Engineering, Ningbo University, Ningbo, China; Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, Ningbo University, Ningbo, China.
| | - Xiaoqun Zeng
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Insititute of Plant Virology, Ningbo University, Ningbo, China; Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, College of Food Science and Engineering, Ningbo University, Ningbo, China; Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, Ningbo University, Ningbo, China.
| | - Zhen Wu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Insititute of Plant Virology, Ningbo University, Ningbo, China; Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, College of Food Science and Engineering, Ningbo University, Ningbo, China; Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, Ningbo University, Ningbo, China
| | - Yuxing Guo
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, China
| | - Daodong Pan
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Insititute of Plant Virology, Ningbo University, Ningbo, China; Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, College of Food Science and Engineering, Ningbo University, Ningbo, China; Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, Ningbo University, Ningbo, China
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Zuo J, Zheng W, Shi N, Song R, Han F, Yang C, Li J, Peng C, Li B, Chen Y. Study on the Thermal Stability of the Sweet-Tasting Protein Brazzein Based on Its Structure-Sweetness Relationship. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:7374-7382. [PMID: 38526016 DOI: 10.1021/acs.jafc.3c09616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/26/2024]
Abstract
Brazzein (Brz) is a sweet-tasting protein composed of 54 amino acids and is considered as a potential sugar substitute. The current methods for obtaining brazzein are complicated, and limited information is available regarding its thermal stability. In this study, we successfully expressed recombinant brazzein, achieving a sweetness threshold of 15.2 μg/mL. Subsequently, we conducted heat treatments at temperatures of 80, 90, 95, and 100 °C for a duration of 2 h to investigate the structural changes in the protein. Furthermore, we employed hydrogen-deuterium exchange coupled to mass spectrometry (HDX-MS) to analyze the effect of heating on the protein structure-sweetness relationships. Our results indicated that the thermal inactivation process primarily affects residues 6-14 and 36-45 of brazzein, especially key residues Tyr8, Tyr11, Ser14, Glu36, and Arg43, which are closely associated with its sweetness. These findings have significant implications for improving the thermal stability of brazzein.
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Affiliation(s)
- Jingnan Zuo
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Wei Zheng
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Nian Shi
- Xianning Vocational Technical College, Xianning 437100, China
| | - Rong Song
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Fei Han
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Chen Yang
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Jingwen Li
- National Facility for Protein Science in Shanghai, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - Chao Peng
- National Facility for Protein Science in Shanghai, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - Bin Li
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Yijie Chen
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Wuhan 430070, China
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Dai Y, Li H, Liu X, Wu Q, Ping Y, Chen Z, Zhao B. Effect of enzymolysis combined with Maillard reaction treatment on functional and structural properties of gluten protein. Int J Biol Macromol 2024; 257:128591. [PMID: 38052287 DOI: 10.1016/j.ijbiomac.2023.128591] [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: 10/29/2023] [Revised: 11/27/2023] [Accepted: 12/01/2023] [Indexed: 12/07/2023]
Abstract
In this work, the modified gluten was prepared by enzymolysis combined with Maillard reaction (MEG), and its functional and structural properties were investigated. The result showed that the maximum foamability of MEG was 19.58 m2/g, the foam stability was increased by 1.8 times compared with gluten, and the solubility and degree of graft were increased to 44.4 % and 28.1 % at 100 °C, whereas the content of sulfhydryl group decreased to 0.81 μmol/g. The scavenging ability on ABTS+radical and DPPH radical of MEG was positively correlated with reaction temperature, and the maximum values were 86.57 % and 71.71 % at 140 °C, respectively. Furthermore, the fluorescence quenching effect of tryptophan and tyrosine residues was enhanced, while the fluorescence intensity decreased with the temperature increase. Scanning electron microscopy revealed that the surface of enzymatically hydrolyzed-gluten became smooth and the cross section became straightened, while MEG turned smaller and irregular approaching a circular structure. FT-IR spectroscopy showed that enzymatic hydrolysis promoted the occurrence of more carbonyl ammonia reactions and the formation of precursors of advanced glycosylation end products. These results provide a feasible method for improving the structure and functional properties of gluten protein.
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Affiliation(s)
- Ya Dai
- College of Food Science and Technology, Henan University of Technology, Zhengzhou, China
| | - Hua Li
- College of Food Science and Technology, Henan University of Technology, Zhengzhou, China; Henan Province Wheat-flour Staple Food Engineering Technology Research Centre, Zhengzhou, China.
| | - Xinhui Liu
- College of Food Science and Technology, Henan University of Technology, Zhengzhou, China
| | - Qingfeng Wu
- College of Food Science and Technology, Henan University of Technology, Zhengzhou, China
| | - Yali Ping
- College of Food Science and Technology, Henan University of Technology, Zhengzhou, China
| | - Zhenzhen Chen
- College of Food Science and Technology, Henan University of Technology, Zhengzhou, China
| | - Beibei Zhao
- College of Food Science and Technology, Henan University of Technology, Zhengzhou, China
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10
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Galvão AMMT, Freitas JC, Karatay GGB, Furtado GDF, Rasera ML, Tavares GM, Hubinger MD. Thermo-induced changes in the structure of lentil protein isolate (Lens culinaris) to stabilize high internal phase emulsions. Int J Biol Macromol 2023; 253:127313. [PMID: 37820922 DOI: 10.1016/j.ijbiomac.2023.127313] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 10/02/2023] [Accepted: 10/06/2023] [Indexed: 10/13/2023]
Abstract
This study aims to assess the impact of heat treatment on the emulsifying properties of lentil protein isolate (LPI) dispersion to produce high internal phase emulsions (HIPEs). The heat-treated LPI dispersion was characterized by size, turbidity, solubility, zeta potential, free sulfhydryl group, electrophoresis, differential scanning calorimetry, circular dichroism, Fourier transforms infrared spectroscopy and intrinsic fluorescence. HIPEs were produced with 25% of LPI dispersion (2%, w/w) and soybean oil (75%) using a rotor-stator (15,500 rpm/1 min). HIPEs were evaluated for their droplet size, zeta potential, centrifugal stability, microscopy, appearance, Turbiscan stability, and rheology over 60 days (25 °C). Heat treatment reduced the size of LPI, resulting in increased turbidity, solubility, and exposure of hydrophobic groups. HIPEs produced with heat-treated LPI at 70 °C (HIPE70) and 80 °C (HIPE80) for 20 min exhibited lower droplet sizes, increased stability, reduced oil loss, and a homogeneous appearance compared to HIPE produced with untreated LPI (HIPEc). In addition, HIPE70 and HIPE80 displayed resistance to shear stress, higher apparent viscosity, and increased storage modulus than HIPEc. HIPEs produced with heat-treated LPI were stable, suggesting that the treatment was efficient for improving the functional properties of the protein and the possibility of future research focusing on fat substitutes in food applications.
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Affiliation(s)
- Andrêssa Maria Medeiros Theóphilo Galvão
- Department of Food Engineering and Technology, School of Food Engineering, State University of Campinas (UNICAMP), Monteiro Lobato Street, 80, 13083-862 Campinas, SP, Brazil.
| | - João Cury Freitas
- Department of Food Engineering and Technology, School of Food Engineering, State University of Campinas (UNICAMP), Monteiro Lobato Street, 80, 13083-862 Campinas, SP, Brazil
| | - Graziele Grossi Bovi Karatay
- Department of Food Engineering and Technology, School of Food Engineering, State University of Campinas (UNICAMP), Monteiro Lobato Street, 80, 13083-862 Campinas, SP, Brazil
| | - Guilherme de Figueiredo Furtado
- Department of Food Science and Nutrition, School of Food Engineering, State University of Campinas (UNICAMP), Monteiro Lobato Street, 80, 13083-862 Campinas, SP, Brazil
| | - Mariana Lamy Rasera
- Department of Food Science and Nutrition, School of Food Engineering, State University of Campinas (UNICAMP), Monteiro Lobato Street, 80, 13083-862 Campinas, SP, Brazil
| | - Guilherme M Tavares
- Department of Food Science and Nutrition, School of Food Engineering, State University of Campinas (UNICAMP), Monteiro Lobato Street, 80, 13083-862 Campinas, SP, Brazil
| | - Míriam Dupas Hubinger
- Department of Food Engineering and Technology, School of Food Engineering, State University of Campinas (UNICAMP), Monteiro Lobato Street, 80, 13083-862 Campinas, SP, Brazil
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11
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Hu J, Yu B, Yuan C, Tao H, Wu Z, Dong D, Lu Y, Zhang Z, Cao Y, Zhao H, Cheng Y, Cui B. Influence of heat treatment before and/or after high-pressure homogenization on the structure and emulsification properties of soybean protein isolate. Int J Biol Macromol 2023; 253:127411. [PMID: 37838131 DOI: 10.1016/j.ijbiomac.2023.127411] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 09/17/2023] [Accepted: 10/10/2023] [Indexed: 10/16/2023]
Abstract
This study investigates the effects of heat treatment before high-pressure homogenization (HHPH) and heat treatment after high-pressure homogenization (HPHH) at different pressures (20, 60, and 100 MPa) on the structural and emulsification properties of soy protein isolate (SPI). The results indicate that HHPH treatment increases the surface hydrophobicity (H0) of the SPI, reduces β-fold and irregular curls, leading to the formation of soluble aggregates, increased adsorbed protein content, and subsequent improvements in emulsification activity index (EAI) and emulsion stability index (ESI). In contrast, the HPHH treatment promoted the exchange of SH/SS bonds between protein molecules and facilitated the interaction of basic peptides and β-subunits, leading to larger particle sizes of the soluble aggregates compared to the HHPH-treated samples. However, excessive aggregation in HPHH-treated aggregates leads to decreased H0 and adsorbed protein content, and increased interfacial tension, negatively affecting the emulsification properties. Compared to the HPHH treatment, HHPH treatment at homogenization pressures of 20 to 100 MPa increases EAI and ESI by 5.81-29.6 % and 5.31-25.9 %, respectively. These findings provide a fundamental basis for soybean protein manufacturers to employ appropriate processing procedures aimed at improving emulsification properties.
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Affiliation(s)
- Jiyong Hu
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China
| | - Bin Yu
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China
| | - Chao Yuan
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China
| | - Haiteng Tao
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China
| | - Zhengzong Wu
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China
| | - Die Dong
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China
| | - Yanmin Lu
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China
| | - Zheng Zhang
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China
| | - Yungang Cao
- School of Food Science and Engineering, Shaanxi University of Science & Technology, Xi'an 710021, China
| | - Haibo Zhao
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China.
| | - Yunhui Cheng
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China; School of Food Science and Bioengineering, Changsha University of Science & Technology, Changsha, Hunan 410114, China.
| | - Bo Cui
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China.
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12
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Liu WL, Wang H, Hu YM, Wang XM, Chen HQ, Tu ZC. Mechanism of the Allergenicity Reduction of Ovalbumin by Microwave Pretreatment-Assisted Enzymolysis through Biological Mass Spectrometry. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:15363-15374. [PMID: 37797215 DOI: 10.1021/acs.jafc.3c04613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/07/2023]
Abstract
Ovalbumin (OVA) is a major allergen in hen eggs. Enzymolysis has been demonstrated as an efficient method for reducing OVA allergenicity. This study demonstrates that microwave pretreatment (MP) at 400 W for 20 s assisting bromelain enzymolysis further decreases the allergenicity of OVA, which was attributed to the increase in the degree of hydrolysis and promoted the destruction of IgE-binding epitopes. The results showed that MP could promote OVA unfolding, expose hydrophobic domains, and disrupt tightly packed α-helical structures and disulfide bonds, which increased the degree of hydrolysis by 7.28% and the contents of peptides below 1 kDa from 43.55 to 85.06% in hydrolysates compared with that for untreated OVA. Biological mass spectrometry demonstrated that the number of intact IgE-binding epitope peptides in MP-assisted OVA hydrolysates decreased by 533 compared to that in hydrolysis without MP; consequently, their IgG/IgE binding rates decreased more significantly. Therefore, MP-assisted enzymolysis may provide an alternative method for decreasing the OVA allergenicity.
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Affiliation(s)
- Wen Li Liu
- State Key Laboratory of Food Science and Resources, Nanchang University, 235 Nanjing East Road, Nanchang, Jiangxi 330047, China
| | - Hui Wang
- State Key Laboratory of Food Science and Resources, Nanchang University, 235 Nanjing East Road, Nanchang, Jiangxi 330047, China
| | - Yue Ming Hu
- State Key Laboratory of Food Science and Resources, Nanchang University, 235 Nanjing East Road, Nanchang, Jiangxi 330047, China
| | - Xu Mei Wang
- National R&D Center of Freshwater Fish Processing and Engineering Research Center of Freshwater Fish High-value Utilization of Jiangxi Province, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
- College of Health, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| | - Hai Qi Chen
- State Key Laboratory of Food Science and Resources, Nanchang University, 235 Nanjing East Road, Nanchang, Jiangxi 330047, China
| | - Zong Cai Tu
- State Key Laboratory of Food Science and Resources, Nanchang University, 235 Nanjing East Road, Nanchang, Jiangxi 330047, China
- National R&D Center of Freshwater Fish Processing and Engineering Research Center of Freshwater Fish High-value Utilization of Jiangxi Province, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
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13
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Li D, Yao M, Yang Y, Wang B, Zhang D, Zhang N. Changes of structure and functional properties of rice protein in the fresh edible rice during the seed development. FOOD SCIENCE AND HUMAN WELLNESS 2023. [DOI: 10.1016/j.fshw.2023.02.049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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14
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Shimoyamada M, Masuda H, Matsuno M, Murakami K, Egusa S. Viscosity of evaporated soymilk prepared in the laboratory using normal and 11S-lacking soybean seeds. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2023; 103:3822-3829. [PMID: 36273264 DOI: 10.1002/jsfa.12288] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 10/20/2022] [Accepted: 10/23/2022] [Indexed: 05/03/2023]
Abstract
BACKGROUND Soymilk is utilized not only as a beverage but also as an alternative to bovine milk, including products such as yoghurt and cream. Evaporated soymilk is expected to be utilized as condensed milk. Raw and heated soymilk samples prepared in our laboratory were evaporated and then subjected to viscosity measurement. The soymilk samples were made from two different varieties: Fukuyutaka, which contains 7S and 11S globulin proteins; and an 11S-lacking soybean (Nanahomare). RESULTS Raw Fukuyutaka soymilk had a lower viscosity and could be concentrated to a solids content of over 300 g kg-1 compared to heated soymilk (around 250 g kg-1 ), but the viscosity changes of Nanahomare soymilk showed an opposite trend. Only 7S globulin was denatured during evaporation at 75 °C and likely affected the interaction between proteins and oil bodies. This tendency was remarkable in the Nanahomare soymilk. The strange viscosity change behavior of evaporated Nanahomare soymilk, number of protein particles, intrinsic fluorescence and flow behavior suggest that thermally denatured 7S globulin accelerates the interactions between oil bodies, whereas 11S globulin, which is probably in its native state, suppresses the acceleration by denatured 7S globulin. CONCLUSION Raw soymilk containing native globulins shows a slower increase in viscosity during evaporation. However, denatured 7S globulin accelerates the increase in viscosity during evaporation through interactions between oil bodies. The effect of the denatured state of individual proteins on interactions is expected to be useful in understanding the interaction between proteins and in controlling their properties and functions. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Makoto Shimoyamada
- Laboratory of Food Engineering, School of Food and Nutritional Sciences, University of Shizuoka, Shizuoka, Japan
| | - Hayato Masuda
- Food Technology Section, Industrial Research Institute of Shizuoka Prefecture, Shizuoka, Japan
| | - Masayuki Matsuno
- Food Technology Section, Industrial Research Institute of Shizuoka Prefecture, Shizuoka, Japan
| | - Kazuya Murakami
- Laboratory of Food Engineering, School of Food and Nutritional Sciences, University of Shizuoka, Shizuoka, Japan
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15
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He M, Zhang M, Gao T, Liu Z, Chen L, Liu Y, Huang Y, Teng F, Li Y. Fabrication and characterization of succinylated and glycosylated soy protein isolate and its self-assembled nanogel. Int J Biol Macromol 2023:125104. [PMID: 37257536 DOI: 10.1016/j.ijbiomac.2023.125104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 05/23/2023] [Accepted: 05/24/2023] [Indexed: 06/02/2023]
Abstract
In this study, we used succinic anhydride (SA) acylation and dextran (DX) glycosylation modified soybean isolate protein (SPI) to develop self-assembled SPI-SA-DX adduct-based nanogels. Degree of modification, SDS-PAGE, and FT-IR studies showed that the amino group of the SPI was replaced by hydrophilic dextran and succinic acid carboxyl groups. Dextran chain and anhydride group attachment to the soybean protein surface enhanced hydrophilicity and spatial site blocking. Modification-induced protein structure unfolding, free sulfhydryl groups to be converted to disulfide bonds, and reduced surface hydrophobicity (H0). H0 was lowest at 33,750 ± 1008.29 when SA content = 10 % protein content (SPI-SA3-DX). The nanometer gel based on SPI-SA3-DX had the maximum turbidity and clear transparent solution without precipitation. Its particle size and polymer dispersibility index (PDI) were also the smallest, with values of (106.87 ± 4.51) nm and 0.21 ± 0.009, respectively. Transmission electron microscopy showed that nanogels had subspherical shell-core structures. Nanogels were stable under different pH, ionic strength, high temperature, and storage conditions.
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Affiliation(s)
- Mingyu He
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Meng Zhang
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Tian Gao
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Zengnan Liu
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Le Chen
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Yue Liu
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Yuyang Huang
- College of Food Engineering, Harbin University of Commerce, Harbin, Heilongjiang 150028, China
| | - Fei Teng
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China.
| | - Yang Li
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China.
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16
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Zheng L, Regenstein JM, Zhou L, Mokhtar SM, Wang Z. Gel Properties and Structural Characteristics of Composite Gels of Soy Protein Isolate and Silver Carp Protein. Gels 2023; 9:gels9050420. [PMID: 37233011 DOI: 10.3390/gels9050420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 05/12/2023] [Accepted: 05/15/2023] [Indexed: 05/27/2023] Open
Abstract
Problems with silver carp protein (SCP) include a strong fishy odor, low gel strength of SCP surimi, and susceptibility to gel degradation. The objective of this study was to improve the gel quality of SCP. The effects of the addition of native soy protein isolate (SPI) and SPI subjected to papain-restricted hydrolysis on the gel characteristics and structural features of SCP were studied. The β-sheet structures in SPI increased after papain treatment. SPI treated with papain was crosslinked with SCP using glutamine transaminase (TG) to form a composite gel. Compared with the control, the addition of modified SPI increased the hardness, springiness, chewiness, cohesiveness, and water-holding capacity (WHC) of the protein gel (p < 0.05). In particular, the effects were most significant when the degree of SPI hydrolysis (DH) was 0.5% (i.e., gel sample M-2). The molecular force results demonstrated that hydrogen bonding, disulfide bonding, and hydrophobic association are important molecular forces in gel formation. The addition of the modified SPI increases the number of hydrogen bonds and the disulfide bonds. Scanning electron microscopy (SEM) analysis showed that the papain modifications allowed the formation of a composite gel with a complex, continuous, and uniform gel structure. However, the control of the DH is important as additional enzymatic hydrolysis of SPI decreased TG crosslinking. Overall, modified SPI has the potential to improve SCP gel texture and WHC.
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Affiliation(s)
- Li Zheng
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
- Heilongjiang Beidahuang Green Health Food Co., Ltd., Kiamusze 154007, China
| | - Joe M Regenstein
- Department of Food Science, Cornell University, Ithaca, NY 14853, USA
| | - Linyi Zhou
- School of Food and Health, Beijing Technology and Business University, Beijing 100048, China
| | - Sayed Mohamed Mokhtar
- Department of Food Technology, Faculty of Agriculture, Suez Canal University, Ismailia 41522, Egypt
| | - Zhongjiang Wang
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
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17
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Ke C, Li L. Influence mechanism of polysaccharides induced Maillard reaction on plant proteins structure and functional properties: A review. Carbohydr Polym 2023; 302:120430. [PMID: 36604091 DOI: 10.1016/j.carbpol.2022.120430] [Citation(s) in RCA: 71] [Impact Index Per Article: 35.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 11/18/2022] [Accepted: 12/01/2022] [Indexed: 12/12/2022]
Abstract
Plant proteins have high nutritional value, a wide range of sources and low cost. However, it is easily affected by the environmental factors of processing and lead the problem of poor functionality. These problems of plant proteins can be improved by the polysaccharides induced Maillard reaction. The interaction between proteins and polysaccharides through Maillard reaction can change the structure of proteins as well as improve the functional properties and biological activity. The products of Maillard reaction, such as reductone intermediates, heterocyclic compounds and melanoidins have certain antioxidant, antibacterial and other biological activities. However, heterocyclic amines, acrylamide, and products generated in the advanced stage of the Maillard reaction also have a negative impact, which may increase cytotoxicity and be associated with chronic diseases. Therefore, it is necessary to effectively control the process of Maillard reaction. This review focuses on the modification of plant proteins by polysaccharide-induced Maillard reaction and the effects of Maillard reaction on protein structure, functional properties and biological activity. It also points out how to accurately reflect the changes of protein structure in Maillard reaction. In addition, it also points out the application ways of plant protein-polysaccharide complexes in the food industry, for example, emulsifiers, delivery carriers of functional substances, and natural antioxidants due to their improved solubility, emulsifying, gelling and antioxidant properties. This review provides theoretical support for controlling Maillard reaction based on protein structure.
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Affiliation(s)
- Chuxin Ke
- College of Food Science, Northeast Agricultural University, Harbin, 150030, China
| | - Liang Li
- College of Food Science, Northeast Agricultural University, Harbin, 150030, China.
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18
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Wang J, Xu Z, Jiang L, Zhang Y, Sui X. Further evaluation on structural and antioxidant capacities of soy protein isolate under multiple freeze-thaw cycles. Food Chem X 2023; 17:100574. [PMID: 36845472 PMCID: PMC9944477 DOI: 10.1016/j.fochx.2023.100574] [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: 11/09/2022] [Revised: 12/30/2022] [Accepted: 01/09/2023] [Indexed: 01/12/2023] Open
Abstract
Multiple freeze-thaw (F-T) treatments could change a protein structure and affect its physicochemical activities. In this work, soy protein isolate (SPI) was subjected to multiple F-T treatments, and the changes in its physicochemical and functional properties were investigated. The three-dimensional fluorescence spectroscopy indicated that F-T treatments changed the structure of SPI, including an increase in surface hydrophobicity. Fourier transform infrared spectroscopy showed that SPI underwent denaturation, unfolding and aggregation due to the interchange of sulfhydryl-disulfide bonds and the exposure of hydrophobic groups. Correspondingly, the particle size of SPI increased significantly and the protein precipitation rate also increased from 16.69%/25.33% to 52.52%/55.79% after nine F-T treatments. The F-T treated SPI had a higher antioxidant capacity. Results indicate that F-T treatments may be used as a strategy to ameliorate preparation methods and improve functional characteristics of SPI, and suggest that multiple F-T treatment is an alternative way to recover soy proteins.
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Affiliation(s)
- Jiayue Wang
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Zejian Xu
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Lianzhou Jiang
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Yan Zhang
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China,Corresponding authors.
| | - Xiaonan Sui
- College of Food Science, Northeast Agricultural University, Harbin 150030, China,Corresponding authors.
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19
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Zhang C, Li Y, Xia X, Sun Q, Sun F, Kong B. Changes in protein oxidation, structure, and thermal stability of chicken breast subjected to ultrasound-assisted immersion freezing during frozen storage. Food Chem 2023; 398:133874. [DOI: 10.1016/j.foodchem.2022.133874] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 07/12/2022] [Accepted: 08/05/2022] [Indexed: 11/27/2022]
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20
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Qu Z, Chen G, Wang J, Xie X, Chen Y. Preparation, structure evaluation, and improvement in foaming characteristics of fibrotic pea protein isolate by cold plasma synergistic organic acid treatment. Food Hydrocoll 2023. [DOI: 10.1016/j.foodhyd.2022.108057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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21
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Wu Q, Zang M, Zhao B, Wang S, Zhang S, Zhu N, Liu M, Li S, Lv G, Liu B, Zhao Y, Qiao X. Effect of citrus fiber on the phosphate-mediated gel properties of myofibrillar protein and partial replacement of phosphate. Lebensm Wiss Technol 2023. [DOI: 10.1016/j.lwt.2022.114274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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22
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Zhao Y, Li G, Xu D, Wu T, Wang S, Cao Y, Gao W. Protective effect of pangasius myosin on thermal stability of lycopene and their interaction mechanism. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.114386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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23
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Liu X, Wang M, Xue F, Adhikari B. Application of ultrasound treatment to improve the technofunctional properties of hemp protein isolate. FUTURE FOODS 2022. [DOI: 10.1016/j.fufo.2022.100176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022] Open
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24
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Liu X, Xue F, Adhikari B. Production of hemp protein isolate-polyphenol conjugates through ultrasound and alkali treatment methods and their characterization. FUTURE FOODS 2022. [DOI: 10.1016/j.fufo.2022.100210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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25
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Improved thermal tolerance of ovotransferrin against pasteurization by phosphorylation. Food Chem 2022; 405:135019. [DOI: 10.1016/j.foodchem.2022.135019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 11/06/2022] [Accepted: 11/18/2022] [Indexed: 11/23/2022]
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26
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Wang Z, Ma S, Li L, Huang J. Effect of wheat bran dietary fiber on structural properties and hydrolysis behavior of gluten after synergistic fermentation of Lactobacillus plantarum and Saccharomyces cerevisiae. Front Nutr 2022; 9:982878. [PMID: 36204369 PMCID: PMC9530331 DOI: 10.3389/fnut.2022.982878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 08/08/2022] [Indexed: 11/26/2022] Open
Abstract
The effect of synergistic fermentation of Lactobacillus plantarum and Saccharomyces cerevisiae on the structural properties and aggregation behavior of gluten containing different wheat bran dietary fiber (WBDF) levels (0, 3, 6, 9, and 12%) was investigated. The results showed that WBDF addition affected the aggregation behavior of gluten at the molecular level, while WBDF significantly induced depolymerization behaviors in large aggregated gluten proteins (Molecular weight > 130 kDa) under reducing conditions (p < 0.05). In terms of secondary structure, WBDF significantly reduced glutamine side chain levels and reduced antiparallel β-sheet structures from 28.57 to 24.53% (p < 0.05). In addition, WBDF thermal properties and its water holding capacity were the main factors causing changes in thermal properties in the overall gluten system. This study provides new data for the improved production of sourdough whole grain and/or high fiber flour products.
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Affiliation(s)
- Zhen Wang
- State Key Laboratory of Crop Stress Adaptation and Improvement, College of Agriculture, Henan University, Kaifeng, China
| | - Sen Ma
- State Key Laboratory of Crop Stress Adaptation and Improvement, College of Agriculture, Henan University, Kaifeng, China
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou, China
- School of Food and Pharmacy, Xuchang University, Xuchang, China
- *Correspondence: Sen Ma
| | - Li Li
- State Key Laboratory of Crop Stress Adaptation and Improvement, College of Agriculture, Henan University, Kaifeng, China
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou, China
| | - Jihong Huang
- State Key Laboratory of Crop Stress Adaptation and Improvement, College of Agriculture, Henan University, Kaifeng, China
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou, China
- School of Food and Pharmacy, Xuchang University, Xuchang, China
- Jihong Huang
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27
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Zhang Y, Zhao W, Xing Z, Zhu B, Hou R, Zhang J, Li T, Zhang Z, Wang H, Li Z. Study on the binding behavior and functional properties of soybean protein isolate and β-carotene. Front Nutr 2022; 9:984490. [PMID: 36159458 PMCID: PMC9493324 DOI: 10.3389/fnut.2022.984490] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Accepted: 08/15/2022] [Indexed: 11/13/2022] Open
Abstract
This study focused on the non-covalent interaction between soybean protein isolate (SPI) and β-carotene (BC). The conformational changes of SPI with β-carotene in varying proportions (BC/SPI: 2%, 4%, 6%, 8%, and 10%) were investigated by multi-spectroscopy and molecular docking. Results showed that the quenching mode is static quenching and binding affinity increased with temperature. The stoichiometry was 1:1, indicating there was only one binding site in SPI. The binding was based on entropy and primarily driven by hydrophobic interactions and its binding constant was in the order of 104 L⋅mol–1. The addition of the β-carotene affected the secondary structure of SPI resulting in an increase in α-Helix and a decrease in random coil and β-turn content, indicating protein aggregated and hydrophobic interactions occurred. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) verified that no new larger molecular weight substance was formed and no covalent interaction existed. Molecular docking corroborated that electrostatic and hydrophobic interactions were both involved in the formation of complexes, where hydrophobic interaction was the dominant one. Moreover, β-carotene improved 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity, foaming capacity, and emulsifying stability of SPI. These findings provide useful information about the interaction mechanism of SPI and β-carotene, which contributes to the further development and application of SPI products rich in β-carotene in the food industry.
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Affiliation(s)
- Yating Zhang
- College of Healthy Science and Engineering, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- *Correspondence: Yating Zhang,
| | - Wenqi Zhao
- College of Healthy Science and Engineering, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Zhuqing Xing
- College of Healthy Science and Engineering, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Beibei Zhu
- College of Chinese Medicine Pharmaceutical Engineering, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Ruiyang Hou
- College of Healthy Science and Engineering, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Junxi Zhang
- College of Healthy Science and Engineering, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Taoran Li
- College of Healthy Science and Engineering, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Zifan Zhang
- College of Healthy Science and Engineering, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Hongwu Wang
- College of Healthy Science and Engineering, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Zheng Li
- College of Chinese Medicine Pharmaceutical Engineering, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- Zheng Li,
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28
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Sun X, Cui Q, Li R, Hao L, Liu H, Wang X, Xu N, Zhao X. Structural and emulsifying properties of soybean protein isolate glycated with glucose based on pH treatment. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2022; 102:4462-4472. [PMID: 35092622 DOI: 10.1002/jsfa.11800] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 01/25/2022] [Accepted: 01/28/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUNDS In the present study, a glycosylated soybean protein with glucose was prepared after pH treatment under different conditions (5.0, 6.0 7.0, 8.0, 9.0) and the conformation and emulsifying properties of soybean protein isolate (SPI) and soybean protein isolate-glucose (SPI-G) were investigated. RESULTS The degree of grafting (37.11%) and browning (39.2%) of SPI-G conjugates were obtained at pH 9.0 (P < 0.05). The results of analysis of polyacrylamide gel electrophoresis, Fourier transform infrared spectroscopy and Endogenous fluorescence spectroscopy showed that the Maillard reaction between the SPI and glucose occurred and the natural rigid structure of test proteins was stretched and became looser, and thus the tertiary conformation was unfolding. Furthermore, the particle size of the all of samples was reduced under different pH conditions, indicating that pH treatment can increase the flexibility of SPI molecules. The proteins exhibited the best surface hydrophobicity, thermal stability and emulsifying activity (EA) of modified products when subjected to a pH treatment of 9.0, whereas they afforded the best emulsion stability (ES) at pH 8.0. There was a good correlation between the molecular flexibility and emulsifying properties of SPI-G [0.963 (F:EA) and 0.879 (F:ES)] (P < 0.05). CONCLUSION The present study shows that the structural and emulsification characteristics of natural SPI and SPI-G conjugates have been significantly enhanced via pH treatment and these results provide a theoretical guidance for the application of glycosylated SPI in the food industry. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Xiaotong Sun
- College of Food Science, Northeast Agricultural University, Harbin, China
| | - Qiang Cui
- College of Food Science, Northeast Agricultural University, Harbin, China
| | - Rui Li
- College of Food Science, Northeast Agricultural University, Harbin, China
| | - Lianghuan Hao
- College of Food Science, Northeast Agricultural University, Harbin, China
| | - Henglin Liu
- College of Food Science, Northeast Agricultural University, Harbin, China
| | - Xibo Wang
- College of Food Science, Northeast Agricultural University, Harbin, China
| | - Ning Xu
- College of Food Science, Northeast Agricultural University, Harbin, China
| | - Xinhuai Zhao
- School of Biology and Food Engineering, Guangdong University of Petrochemical Technology, Maoming, China
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29
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Bian ZY, Tu ZC, Wang H, Hu YM, Liu GX. Investigation of the Mechanism of 60Co Gamma-Ray Irradiation-Stimulated Oxidation Enhancing the Antigenicity of Ovalbumin by High-Resolution Mass Spectrometry. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:9477-9488. [PMID: 35881501 DOI: 10.1021/acs.jafc.2c03911] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
60Co gamma-ray irradiation-induced antigenicity changes in ovalbumin (OVA) were investigated, and the molecular mechanism was analyzed. Irradiation treatment at 0-100 kGy could significantly enhance the IgG/IgE binding ability of OVA in a dose-dependent paradigm by concomitant oxidative modification, which exhibited color browning and an increase in carbonyl content caused by high-penetrable rays. More allergenic epitopes of OVA were exposed after irradiation treatment reflected by structural changes including the unfolding of tertiary structure, the conversion of α-helix structures to β-sheet and random coil structures, and the cleavage of several peptide bonds. Meanwhile, three oxidation sites of K46, T49, and N260 located in key linear epitopes were observed, which might increase the allergenic ability of OVA via the disaggregation of noncovalent bonds and the unwinding of α-helix structures. Conclusively, irradiation may enhance the potential allergenicity of OVA by oxidative modification, which provides theoretical guidance for effectively controlling the oxidation of proteins in the irradiation process.
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Affiliation(s)
- Zhong-Yue Bian
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, Jiangxi, China
| | - Zong-Cai Tu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, Jiangxi, China
- National R&D Center of Freshwater Fish Processing, Jiangxi Normal University, Nanchang 330022, Jiangxi, China
- Engineering Research Center of Freshwater Fish High-value Utilization of Jiangxi Province, Jiangxi Normal University, Nanchang 330022, Jiangxi, China
| | - Hui Wang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, Jiangxi, China
| | - Yue-Ming Hu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, Jiangxi, China
| | - Guang-Xian Liu
- Institute of Food Science and Technology, Jiangxi Academy of Agricultural Sciences, Nanchang 330299, Jiangxi, China
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30
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Han R, Shao S, Zhang H, Qi H, Xiao F, Shen Y, Fan L, Wang H, Zhao D, Li G, Yan M. Physico-chemical properties, antioxidant activity, and ACE inhibitory activity of protein hydrolysates from wild jujube seed. J Food Sci 2022; 87:2484-2503. [PMID: 35502672 PMCID: PMC9325541 DOI: 10.1111/1750-3841.16157] [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: 09/26/2021] [Revised: 03/02/2022] [Accepted: 03/27/2022] [Indexed: 11/28/2022]
Abstract
Wild jujube seed protein (WJSP) as one kind of functional food material has attracted much attention due to its highly nutritive and medicinal value in anti-inflammatory and improving immunomodulatory ability. However, owing to its large molecular weight and complex structure, biological activities of WJSP were greatly limited and cannot be fully utilized by the human body. Therefore, how to improve the bioavailability of WJSP and develop promising WJSP nutritious materials is a great challenge. In this work, wild jujube seed protein hydrolysates (WJSPHs) were prepared from WJSP via enzymatic hydrolysis method, and their physico-chemical properties, antioxidant activity, and angiotensin converting enzyme (ACE) inhibitory activity in vitro have been investigated for the first time. SDS-PAGE electrophoresis and size-exclusion chromatographic results indicate that WJSPHs have lower molecular weight distribution (< 5,000 Da) than WJSP. Circular dichroism (CD) spectroscopy and Fourier transform infrared spectroscopy (FTIR) results illustrated that random coil is the main secondary structure of WJSPHs. Antioxidant experiments indicate that WJSPHs exhibit high radicals-scavenging ability of 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals (94.60%), 2,2'-azinobis-(3-ethylbenzthiazoline-6-sulfonate) (ABTS+ ) radicals (90.84%), superoxide radicals (44.77%), and hydroxyl radicals (47.77%). In vitro, WJSPHs can significantly decrease the accumulation of reactive oxygen species (ROS) and malondialdehyde (MDA), and increase the activity of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) in HepG2 cells. Moreover, ACE activity was found that can be significantly inhibited by WJSPHs (73.02%). Therefore, all previously mentioned results suggest that WJSPHs may be a promising antioxidant food to prevent oxidative-related diseases in future. PRACTICAL APPLICATION: This study shows that WJSPHs exhibit high antioxidant activity and ACE inhibitory activity in vitro, which provide potential application value as antioxidant peptides to prevent oxidative-related diseases.
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Affiliation(s)
- Rongxin Han
- Changchun University of Chinese Medicine, Changchun, China
| | - Shuai Shao
- Changchun University of Chinese Medicine, Changchun, China
| | - Hongyin Zhang
- Changchun University of Chinese Medicine, Changchun, China
| | - Hongyu Qi
- Changchun University of Chinese Medicine, Changchun, China
| | - Fengqin Xiao
- Changchun University of Chinese Medicine, Changchun, China
| | - Yingxin Shen
- Changchun University of Chinese Medicine, Changchun, China
| | - Lin Fan
- Changchun University of Chinese Medicine, Changchun, China
| | - Haidong Wang
- Changchun University of Chinese Medicine, Changchun, China
| | - Daqing Zhao
- Changchun University of Chinese Medicine, Changchun, China
| | - Guangzhe Li
- Changchun University of Chinese Medicine, Changchun, China.,Jilin Provincial Science and Technology Innovation Center of Health Food of Chinese Medicine, Changchun University of Chinese Medicine, Changchun, Jilin, China
| | - Mingming Yan
- Changchun University of Chinese Medicine, Changchun, China.,Jilin Provincial Science and Technology Innovation Center of Health Food of Chinese Medicine, Changchun University of Chinese Medicine, Changchun, Jilin, China
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31
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Effect of NaCl on the Rheological, Structural, and Gelling Properties of Walnut Protein Isolate-κ-Carrageenan Composite Gels. Gels 2022; 8:gels8050259. [PMID: 35621557 PMCID: PMC9141317 DOI: 10.3390/gels8050259] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 04/16/2022] [Accepted: 04/18/2022] [Indexed: 02/07/2023] Open
Abstract
In this study, we discovered that a certain concentration of Na+ (15 mM) significantly improved the bond strength (12.94 ± 0.93 MPa), thermal stability (72.68 °C), rheological properties, and textural attributes of walnut protein isolate (WNPI)-κ-carrageenan (KC) composite gel. Electrostatic force, hydrophobic interaction, hydrogen bond, and disulfide bond were also significantly strengthened; the α-helix decreased, and the β-sheet increased in the secondary structure, indicating that the protein molecules in the gel system aggregated in an orderly manner, which led to a much denser and more uniform gel network as well as improved water-holding capacity. In this experimental research, we developed a new type of walnut protein gel that could provide technical support for the high-value utilization and quality control of walnut protein.
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32
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Gao K, Zha F, Yang Z, Rao J, Chen B. Structure characteristics and functionality of water-soluble fraction from high-intensity ultrasound treated pea protein isolate. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2021.107409] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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33
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Wang YT, Zhong BZ, Wang H. Analysis of the Structure and Antigenicity in Ovalbumin Modified with Six Disaccharides Through Liquid Chromatography-High-Resolution Mass Spectrometry. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:3096-3108. [PMID: 35253441 DOI: 10.1021/acs.jafc.1c03488] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Melibiose, cellobiose, maltose, lactose, turanose, and isomaltulose were selected to be glycated with OVA. The number of free amino groups of OVA modified with different disaccharides decreased, and the secondary and tertiary structures of the modified OVA also changed greatly. Moreover, the glycation sites detected by HPLC-HCD-MS/MS were all on the sensitized epitopes of OVA, which reduced the binding ability of IgG and IgE of glycated OVA. In addition, the glycation sites with the highest DSP in different samples were located in the irregular coil region of OVA. Among the six disaccharides, the glycation reaction between melibiose and OVA was the most obvious. Through the analysis of disaccharide configuration, it was found that the glycation efficiency of the reducing disaccharide linked by a 1 → 6 glycoside bond was higher than that by a 1 → 4 glycoside bond, and reducing sugar with β type was better than that with α type. These findings would provide a theoretical reference for the use of different sugars in food production.
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Affiliation(s)
- Ya-Ting Wang
- State Key Laboratory of Food Science and Technology, Nanchang University, 235 East Nanjing Road, Nanchang 330047, Jiangxi, China
| | - Bi-Zhen Zhong
- State Key Laboratory of Food Science and Technology, Nanchang University, 235 East Nanjing Road, Nanchang 330047, Jiangxi, China
- National R&D Center of Freshwater Fish Processing, Jiangxi Normal University, Nanchang 330022, China
- Engineering Research Center of Freshwater Fish High-value Utilization of Jiangxi Province, Jiangxi Normal University, Nanchang 330022, China
| | - Hui Wang
- State Key Laboratory of Food Science and Technology, Nanchang University, 235 East Nanjing Road, Nanchang 330047, Jiangxi, China
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34
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Effect of freeze-thaw treatment on the structure and texture of soy protein-dextran conjugate gels crosslinked by transglutaminase. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2021.112443] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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35
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Wang J, Li M, Zhang J, Lv Y, Li X, Guo S. Effects of high-temperature pressure cooking on cold-grind and blanched soymilk: Physico-chemical properties, in vitro digestibility and sensory quality. Food Res Int 2021; 149:110669. [PMID: 34600671 DOI: 10.1016/j.foodres.2021.110669] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 08/11/2021] [Accepted: 08/24/2021] [Indexed: 11/17/2022]
Abstract
The present work investigated effects of high-temperature pressure cooking (HP) on physico-chemical properties and in vitro protein digestibility of cold-grind soymilk (CS) and blanched soymilk (BS). Confocal laser scanning microscopy presented that proteins and lipids in BS were obviously coalesced compared with CS, while HP treatment contributed to homogeneous dispersion of protein and lipid. Particle size of the BS and BSHP were larger than that of CS and CSHP. Tertiary structure of protein suggested that hydrophobic interactions and disulfide bonds in CS and CSHP were main force among protein molecules. Meanwhile hydrophobic interactions were account for 70% of the total bonds in BS and BSHP. The maximum fluorescence excitation wavelength (λmax) of BSHP (349.0 nm) was shown a red shift compared with CS (346.5 nm). For secondary structure of protein, β-sheet was 30.61% in CS, while CSHP, BS and BSHP decreased by 2.65%, 5.73% and 7.77%, respectively. Thus, the protein in BS and BSHP were evidently aggregated, loose and disorder; while the CS and CSHP protein were dense and orderly. Also, HP treatment led to loose and unordered protein structure. Moreover, the in vitro digestibility was BSHP > BS > CSHP > CS. The difference in digestibility of four soymilk was determined by the protein structure. Sensory evaluation showed that blanching treatment effectively reduced beany flavor and HP decreased the diameter of oil bodies of BS, which led to smooth mouth feel and thus the highest global impression of BSHP.
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Affiliation(s)
- Jing Wang
- Beijing Laboratory for Food Quality and Safety; Key Laboratory of Agricultural Product Detection and Control for Spoilage Organisms and Pesticides; Food Science and Engineering College, Beijing University of Agriculture, Beijing 102206, China
| | - Mengdi Li
- Beijing Laboratory for Food Quality and Safety; Key Laboratory of Agricultural Product Detection and Control for Spoilage Organisms and Pesticides; Food Science and Engineering College, Beijing University of Agriculture, Beijing 102206, China
| | - Jiayu Zhang
- Beijing Laboratory for Food Quality and Safety; Key Laboratory of Agricultural Product Detection and Control for Spoilage Organisms and Pesticides; Food Science and Engineering College, Beijing University of Agriculture, Beijing 102206, China
| | - Ying Lv
- Beijing Laboratory for Food Quality and Safety; Key Laboratory of Agricultural Product Detection and Control for Spoilage Organisms and Pesticides; Food Science and Engineering College, Beijing University of Agriculture, Beijing 102206, China.
| | - Xingyu Li
- Beijing Laboratory for Food Quality and Safety; Key Laboratory of Agricultural Product Detection and Control for Spoilage Organisms and Pesticides; Food Science and Engineering College, Beijing University of Agriculture, Beijing 102206, China
| | - Shuntang Guo
- College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, China
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36
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Effects of high-pressure homogenization on structural and emulsifying properties of thermally soluble aggregated kidney bean (Phaseolus vulgaris L.) proteins. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2021.106835] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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37
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Yang L, Huang J, Wu X, Li L, Cai W, Zhu L, Wang S, Song H, Zhu D, Ma T, Liu H. Interactions between gut microbiota and soy hull polysaccharides regulate the air-liquid interfacial activity. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2021.106704] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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38
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Zhang A, Cui Q, Yu Z, Wang X, Zhao XH. Effects of transglutaminase glycosylated soy protein isolate on its structure and interfacial properties. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2021; 101:5097-5105. [PMID: 33576008 DOI: 10.1002/jsfa.11155] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 01/22/2021] [Accepted: 02/12/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUNDS The structural and interfacial properties of soybean protein isolate (SPI) after glycosylation by the transglutaminase method were studied. It is hoped that preliminary explorations will find a new food ingredient and broader application of SPI in the food industry. RESULTS The contents of free amino proves that transglutaminase can insert glucosamine into SPI through its transamination, and realize the enzymatic glycosylated SPI. The results of structure properties showed that a decrease in the content of the α-helical structure indicates that the rigid structure of the protein is opened and the flexibility is increased. The blue shift of the maximum fluorescence intensity of soy protein isolate-glucosamine with transglutaminase (SPI-G) indicates the formation of a new substance; scanning electron microscopy shows that the SPI-G powder can be seen at a magnification of 2000×, and the protein structure becomes soft. The results of interfacial properties found that enzymatic protein glycosylation exposes the internal hydrophobic groups of SPI, resulting in increased surface hydrophobicity, increased emulsification and emulsification stability, and reduced surface tension. CONCLUSION It shows that SPI-G effectively improves the interfacial properties of SPI, providing a theoretical basis for the application of enzymatic glycosylation of SPI in the food industry. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Anqi Zhang
- College of Food Science, Northeast Agricultural University, Harbin, China
| | - Qiang Cui
- College of Food Science, Northeast Agricultural University, Harbin, China
| | - Zhichao Yu
- College of Food Science, Northeast Agricultural University, Harbin, China
| | - Xibo Wang
- College of Food Science, Northeast Agricultural University, Harbin, China
| | - Xin-Huai Zhao
- School of Biology and Food Engineering, Guangdong University of Petrochemical Technology, Maoming, China
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39
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Liu L, Lan W, Pu T, Zhou Y, Xie J. Combining slightly acidic electrolyzed water and slurry ice to prolong the shelf‐life of mackerel (
Pneumatophorus japonicus
). J FOOD PROCESS PRES 2021. [DOI: 10.1111/jfpp.15762] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Lin Liu
- College of Food Science and Technology Shanghai Ocean University Shanghai China
| | - Weiqing Lan
- College of Food Science and Technology Shanghai Ocean University Shanghai China
- Shanghai Aquatic Products Processing and Storage Engineering Technology Research Center Shanghai China
- National Experimental Teaching Demonstration Center for Food Science and Engineering (Shanghai Ocean University) Shanghai China
| | - Tianting Pu
- College of Food Science and Technology Shanghai Ocean University Shanghai China
| | - Yuxiao Zhou
- College of Food Science and Technology Shanghai Ocean University Shanghai China
| | - Jing Xie
- College of Food Science and Technology Shanghai Ocean University Shanghai China
- Shanghai Aquatic Products Processing and Storage Engineering Technology Research Center Shanghai China
- National Experimental Teaching Demonstration Center for Food Science and Engineering (Shanghai Ocean University) Shanghai China
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40
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Xie Y, Chen B, Guo J, Nie W, Zhou H, Li P, Zhou K, Xu B. Effects of low voltage electrostatic field on the microstructural damage and protein structural changes in prepared beef steak during the freezing process. Meat Sci 2021; 179:108527. [PMID: 33962166 DOI: 10.1016/j.meatsci.2021.108527] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 03/25/2021] [Accepted: 04/22/2021] [Indexed: 10/21/2022]
Abstract
This study investigated the effect of low voltage electrostatic field (LVEF) on the microstructure damage and protein structure changes of prepared beef steak during freezing. The scanning electron microscopy results showed that LVEF-assisted freezing (LVEFF) minimized the gaps in the cross section between muscle fibers induced by freezing and thus improved fiber compactness. Furthermore, LVEFF reduced the length of the enlarged sarcomere, repaired the Z-line fractures, and intensified the dismission of the A band in the air-blast freezing (AF) process. The decreased carbonyl content and increased total sulfhydryl content indicated that LVEFF reduced protein oxidation in the freezing process. In addition, the results of Raman spectroscopy and fluorescence spectroscopy revealed that LVEFF minimized the changes in protein secondary and tertiary structures during freezing. In conclusion, utilization of LVEF in the freezing of prepared beef steak could reduce both the microstructure damage and protein structure changes in the freezing process.
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Affiliation(s)
- Yong Xie
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China
| | - Bo Chen
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China
| | - Jie Guo
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China
| | - Wen Nie
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China
| | - Hui Zhou
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China; State Key Laboratory of Meat Processing and Quality Control, Jiangsu Yurun Meat Food Co. LTD, Nanjing 210000, Jiangsu Province, China
| | - Peijun Li
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China; Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230601, China
| | - Kai Zhou
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China; Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230601, China.
| | - Baocai Xu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China; Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230601, China.
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41
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He M, Li L, Wu C, Zheng L, Jiang L, Huang Y, Teng F, Li Y. Effects of glycation and acylation on the structural characteristics and physicochemical properties of soy protein isolate. J Food Sci 2021; 86:1737-1750. [PMID: 33822377 DOI: 10.1111/1750-3841.15688] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 01/25/2021] [Accepted: 02/20/2021] [Indexed: 11/29/2022]
Abstract
This study examined the effects of different sequential treatments of dextran glycation and succinic anhydride acylation on the structure and physicochemical properties of soy protein isolate (SPI). The tested properties included electrophoresis (SDS-PAGE), Fourier transform infrared spectroscopy, endogenous fluorescence spectroscopy, surface hydrophobicity (H0 ), free sulfhydryl (-SH), solubility, interfacial properties, rheological properties, and scanning electron microscope (SEM). The results show that the two treatments significantly improved the structure and functional characteristics of the SPI. The order of the methods had an important effect on the SPI. The lowest H0 (231.76 ± 11.92), the highest free -SH content (3.09 ± 0.09 µmol/g), and the highest solubility at pH = 7 (77 ± 3.97%) were obtained when the acylation treatment was followed by the glycation treatment. Emulsification, emulsion stability, foaming, and foam stability were also the highest. Glycation and acylation caused the viscosity coefficient (k) of the SPI solution to decrease compared with SPI alone, but the flow index (n) value increased, and the sum G' value of the conjugate system decreased as gel time increased. SEM showed that its microstructure has changed significantly. Therefore, this research provided an effective method for improving the functional characteristics of SPI and had potential industrial application prospects. PRACTICAL APPLICATION: Glycation and acylation of soybean protein isolate improved the chemical modification method of protein, improved the functional properties of soybean protein, widened its application in food and materials, and provided a new idea for the further development and utilization of soybean protein.
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Affiliation(s)
- Mingyu He
- Department of Food Science, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China
| | - Lijia Li
- Department of Food Science, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China
| | - Changling Wu
- Department of Food Science, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China
| | - Li Zheng
- Department of Food Science, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China
| | - Lianzhou Jiang
- Department of Food Science, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China
| | - YuYang Huang
- National Soybean Engineering Technology Research Center, Harbin, Heilongjiang, 150030, China.,Department of Food Engineering, Harbin University of Commerce, Harbin, Heilongjiang, 150028, China
| | - Fei Teng
- Department of Food Science, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China
| | - Yang Li
- Department of Food Science, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China.,National Soybean Engineering Technology Research Center, Harbin, Heilongjiang, 150030, China.,Heilongjiang Academy of Green Food Science, Harbin, Heilongjiang, 150030, China
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42
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Zheng W, Chen ZP, Yang YH, Yang R, Yang TD, Lai PL, Chen TL, Qiu SL, Wang SY, Liao L. Improved stabilization of coix seed oil in a nanocage-coating framework based on gliadin-carboxymethyl chitosan-Ca 2. Carbohydr Polym 2021; 257:117557. [PMID: 33541626 DOI: 10.1016/j.carbpol.2020.117557] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 12/02/2020] [Accepted: 12/20/2020] [Indexed: 11/26/2022]
Abstract
Coix seed oil (CSO) is easily suffered functional-loss by oxidation and hydrothermal-treatment. The environmental stable nanocage-coating-CSO particles (OGC-Ca) by the frameworks consist of gliadins, carboxymethyl chitosan (CMCS) and Ca2+ were investigated. Results showed Ca2+ was the key controller for fabricating this nanocage-coating-frameworks, bridging macromolecule-chains with electrostatic interaction and hydrogen bonds, detected by FTIR, CD, DSC and XRD. SEM displayed new-formed velvet-like twigs after cross-linking CMCS to gliadins. Ca2+ assisted the nanocage-coating by significant down-sizing conversion OGC to OGC-Ca with consumption of twigs. OGC-Ca displayed a good stability towards heat (60-80 °C, 0-80 min), pH (3-8), NaCl (0-0.5 mM), storage (4/25 °C, 12 days), and a reduce of the pre-oxidation value of CSO in water and the improved controlled release of CSO in simulated GI tract. It illustrated GC-Ca frameworks would be a suitable delivery carrier for the CSO like pharmaceuticals and nutraceuticals for the food or medical use.
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Affiliation(s)
- Wenyu Zheng
- Department of Food Science, College of Food Science and Engeerning, Foshan University, Foshan, Guangdong, 528000, People's Republic of China
| | - Zhan-Peng Chen
- Department of Food Science, College of Food Science and Engeerning, Foshan University, Foshan, Guangdong, 528000, People's Republic of China
| | - Yan-Hong Yang
- College of Biological Science and Technology, Fuzhou University, Fuzhou, Fujian, 350108, People's Republic of China
| | - Rong Yang
- Department of Food Science, College of Food Science and Engeerning, Foshan University, Foshan, Guangdong, 528000, People's Republic of China
| | - Tu-di Yang
- Department of Food Science, College of Food Science and Engeerning, Foshan University, Foshan, Guangdong, 528000, People's Republic of China
| | - Pei-Li Lai
- Department of Food Science, College of Food Science and Engeerning, Foshan University, Foshan, Guangdong, 528000, People's Republic of China
| | - Tong-Lin Chen
- Department of Food Science, College of Food Science and Engeerning, Foshan University, Foshan, Guangdong, 528000, People's Republic of China
| | - Shui-Ling Qiu
- Department of Food Science, College of Food Science and Engeerning, Foshan University, Foshan, Guangdong, 528000, People's Republic of China
| | - Shao-Yun Wang
- College of Biological Science and Technology, Fuzhou University, Fuzhou, Fujian, 350108, People's Republic of China.
| | - Lan Liao
- Department of Food Science, College of Food Science and Engeerning, Foshan University, Foshan, Guangdong, 528000, People's Republic of China; College of Biological Science and Technology, Fuzhou University, Fuzhou, Fujian, 350108, People's Republic of China.
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43
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Yu D, Zhang X, Zou W, Tang H, Yang F, Wang L, Elfalleh W. Raman spectroscopy analysis of the effect of electrolysis treatment on the structure of soy protein isolate. JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION 2021. [DOI: 10.1007/s11694-020-00716-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Xu L, Xia Q, Cao J, He J, Zhou C, Guo Y, Pan D. Ultrasonic effects on the headspace volatilome and protein isolate microstructure of duck liver, as well as their potential correlation mechanism. ULTRASONICS SONOCHEMISTRY 2021; 71:105358. [PMID: 33068842 PMCID: PMC7786588 DOI: 10.1016/j.ultsonch.2020.105358] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 09/27/2020] [Accepted: 10/01/2020] [Indexed: 05/04/2023]
Abstract
In spite of the high added value and tremendous output from duck processing industries, duck liver (DLv) is underutilized and a major factor is related to its prominent off-flavor perception which hampers the consumption and processing attributes. This work was designed to investigate the impact of low-frequency ultrasound (US) pretreatments on the headspace volatilome evolution of DLv and its isolated protein (DLvP) microstructure, aiming at exploring the potential of US technology to inhibit off-flavor perception and possible mechanisms behind. Results suggested that US pretreatment resulted in decreased lipid oxidation and off-flavor perception, simultaneously without significantly causing physicochemical influence including texture, pH and color. US induced obvious tertiary structural changes of DLvP, as revealed by the intrinsic fluorescence and surface hydrophobicity (H0), whereas the SH, S-S, secondary structure and molecular weight of DLvP remained unaffected, suggesting the presence of molten globule state (MG-state) under ultrasonic conditions. Besides, the headspace contents of flavor compounds, mainly aldehydes and alcohols, were significantly decreased whereas acids were increased. Multivariate analysis suggested an obvious US-induced effect on the volatilome evolution of DLv samples. Discriminant analysis recognized the aroma compounds including aldehydes and alkenals as the major contributors leading to the change of olfactory characteristics of DLv after ultrasonic treatment. Correlation analysis demonstrated the positive relationship between the volatile markers variation and the increased H0 values, a characteristic attribute of MG-state protein. The results obtained in this work suggested that US technology matched with suitable parameters could be a very promising approach to modulate the off-flavor perception of liver products by altering DLvP conformation.
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Affiliation(s)
- Le Xu
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, College of Food and Pharmaceutical Science, Ningbo University, Ningbo 315211, China
| | - Qiang Xia
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, College of Food and Pharmaceutical Science, Ningbo University, Ningbo 315211, China; State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo 315211, China.
| | - Jinxuan Cao
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, College of Food and Pharmaceutical Science, Ningbo University, Ningbo 315211, China; State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo 315211, China.
| | - Jun He
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, College of Food and Pharmaceutical Science, Ningbo University, Ningbo 315211, China; State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo 315211, China
| | - Changyu Zhou
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, College of Food and Pharmaceutical Science, Ningbo University, Ningbo 315211, China; State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo 315211, China
| | - Yuxing Guo
- Department of Food Science and Technology, School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, China
| | - Daodong Pan
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, College of Food and Pharmaceutical Science, Ningbo University, Ningbo 315211, China; State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo 315211, China; National R&D Center for Freshwater Fish Processing, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
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Structural, gelation properties and microstructure of rice glutelin/sugar beet pectin composite gels: Effects of ionic strengths. Food Chem 2020; 346:128956. [PMID: 33418414 DOI: 10.1016/j.foodchem.2020.128956] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 10/31/2020] [Accepted: 12/23/2020] [Indexed: 01/20/2023]
Abstract
In this study, the rice glutelin (RG)/sugar beet pectin (SBP) composite gels were prepared by laccase induced cross-linking and subsequent heat treatment, and the effects of different calcium ion concentrations (0-400 mM) on the gelation, structural properties and microstructure of the RG/SBP composite gels were investigated. The results showed that the addition of 200 mM calcium ion could improve the rheological, textural properties and water holding capacity of the RG/SBP composite gels. The addition of SBP and calcium ions enhanced the hydrophobic interaction between RG molecules, thereby increased the gel properties of RG. The changes in Raman spectroscopy reflected the positive effect of the addition of SBP and calcium ions on the formation of a denser and more homogeneous protein gel, as evidenced by the results of scanning electron microscopy. Overall, SBP and calcium ions could be applied to the plant protein gel systems as gel-strengthening agents.
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Mandal P, Molla AR. Solvent Perturbation of Protein Structures - A Review Study with Lectins. Protein Pept Lett 2020; 27:538-550. [PMID: 31682206 DOI: 10.2174/0929866526666191104145511] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 08/05/2019] [Accepted: 08/07/2019] [Indexed: 01/07/2023]
Abstract
Use of organic molecules as co-solvent with water, the ubiquitous biological solvent, to perturb the structure of proteins is popular in the research area of protein structure and folding. These organic co-solvents are believed to somehow mimic the environment near the cell membrane. Apart from that they induce non-native states which can be present in the protein folding pathway or those states also may be representative of the off pathway structures leading to amyloid formation, responsible for various fatal diseases. In this review, we shall focus on organic co-solvent induced structure perturbation of various members of lectin family. Lectins are excellent model systems for protein folding study because of its wide occurrence, diverse structure and versatile biological functions. Lectins were mainly perturbed by two fluoroalcohols - 2,2,2- trifluoroethanol and 1,1,1,3,3,3-hexafluoroisopropanol whereas glycerol, ethylene glycol and polyethylene glycols were used in some cases. Overall, all native lectins were denatured by alcohols and most of the denatured lectins have predominant helical secondary structure. But characterization of the helical states and the transition pathway for various lectins revealed diverse result.
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Affiliation(s)
- Pritha Mandal
- Department of Chemistry, Krishnagar Government College, Krishnagar, West Bengal-741101, India
| | - Anisur R Molla
- Department of Chemistry, Bidhannagar College, Salt Lake, Kolkata -700 064, India
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47
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Simultaneous Ultrasound and Heat Enhance Functional Properties of Glycosylated Lactoferrin. Molecules 2020; 25:molecules25235774. [PMID: 33297553 PMCID: PMC7730217 DOI: 10.3390/molecules25235774] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 12/03/2020] [Accepted: 12/04/2020] [Indexed: 01/07/2023] Open
Abstract
Protein-polysaccharide covalent complexes exhibit better physicochemical and functional properties than single protein or polysaccharide. To promote the formation of the covalent complex from lactoferrin (LF) and beet pectin (BP), we enhanced the Maillard reaction between LF and BP by using an ultrasound-assisted treatment and studied the structure and functional properties of the resulting product. The reaction conditions were optimized by an orthogonal experimental design, and the highest grafting degree of 55.36% was obtained by ultrasonic treatment at 300 W for 20 min and at LF concentration of 20 g/L and BP concentration of 9 g/L. The formation of LF-BP conjugates was confirmed by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and Fourier transform infrared (FTIR) spectroscopy. Ultrasound-assisted treatment can increase the surface hydrophobicity, browning index, 1,1-diphenyl-2-picryl-hydrazyl (DPPH) and 2,2'-azinobis-(3-ethylbenzthiazoline-6-sulphonate) (ABTS) free radicals scavenging activity of LF due to the changes in the spatial configuration and formation of Maillard reaction products. The thermal stability, antioxidant activity and emulsifying property of LF were significantly improved after combining with BP. These findings reveal the potential application of modified proteins by ultrasonic and heat treatment.
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48
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Ji H, Tang X, Li L, Peng S, Gao C, Chen Y. Improved physicochemical properties of peanut protein isolate glycated by atmospheric pressure cold plasma (ACP) treatment. Food Hydrocoll 2020. [DOI: 10.1016/j.foodhyd.2020.106124] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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49
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Jiang S, Zhang J, Li S, Zhang C. Effect of enzymatic hydrolysis on the formation and structural properties of peanut protein gels. INTERNATIONAL JOURNAL OF FOOD ENGINEERING 2020. [DOI: 10.1515/ijfe-2018-0356] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The limited enzymatic hydrolysis gelation method was investigated using peanut protein isolate (PPI) without any coagulators. A peanut protein gel could be formed by enzyme treatment with Alcalase at low temperature (50–70 °C). The influence of enzymatic hydrolysis on the rheological and physicochemical properties was investigated. Structural changes in the PPI were characterized by analyzing the subunits, chemical forces, surface hydrophobicity, fluorescence spectra, and circular dichroism (CD) spectra. The results revealed that enzymatic hydrolysis significantly affected the conarachin II protein of PPI, and had little influence on conarachin I and the basic subunits of arachin. Hydrophobic interaction was the main chemical force active in the peanut protein gel. An increase in the surface hydrophobicity coupled with red-shifts of the fluorescence spectra indicated that inner hydrophobic regions were exposed after hydrolysis, resulting in gel formation via hydrophobic interactions. The CD spectra showed that significant changes occurred in the secondary structure of PPI, where the ordered PPI structure formed a more open structure after enzymatic hydrolysis.
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Affiliation(s)
- Shan Jiang
- College of Food , Shenyang Agricultural University , No. 120 Dongling Road, Shenhe District , Shenyang City 110866, China
| | - Junting Zhang
- College of Food , Shenyang Agricultural University , No. 120 Dongling Road, Shenhe District , Shenyang City 110866, China
| | - Suhong Li
- College of Food , Shenyang Agricultural University , No. 120 Dongling Road, Shenhe District , Shenyang City 110866, China
| | - Chunhong Zhang
- College of Food , Shenyang Agricultural University , No. 120 Dongling Road, Shenhe District , Shenyang City 110866, China
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50
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Yu Y, Zhang H, Zhu J, Liu J, Zhang T. Effect of ultrasound-irradiation combined pretreatment on the foamability of liquid egg white. J Food Sci 2020; 85:4312-4318. [PMID: 33190246 DOI: 10.1111/1750-3841.15530] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 10/12/2020] [Accepted: 10/13/2020] [Indexed: 11/29/2022]
Abstract
This study aims to optimize the ultrasound-irradiation combined pretreatment conditions to enhance the liquid egg white (LEW) foamability and investigate the changing mechanism about the physical and structural properties of LEW during the processing. Results indicated that the foamability of the LEW was increased by ultrasound-irradiation combined pretreatment to the highest value of 92.6% (irradiation dose = 33 kGy, ultrasound time = 6 min, and ultrasound power = 300 W). Three significant proteins in LEW (ovalbumin, ovotransferrin, and lysozyme) were chosen to explore the change law on their physical and structural properties. Results indicated that ultrasound-irradiation combined pretreatment increased the solubility and reduced the pH and particle size of ovalbumin and lysozyme, thus enhancing the foamability of LEW. Furthermore, the fluorescence spectra changes implied the un-folding and destruction of ovalbumin, ovotransferrin, and lysozyme during the ultrasound-irradiation combined pretreatment. Moreover, circular dichroism spectroscopy analysis revealed that the pretreatment decreased α-helix and β-sheet of the ovalbumin, ovotransferrin, and lysozyme, which bring out the improvement of LEW foamability. The present study indicated that ultrasound-irradiation combined pretreatment had the potential to be implemented to enhance the foamability of LEW.
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Affiliation(s)
- Yali Yu
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun, P. R. China.,College of Food Science and Engineering Jilin University, Changchun, P. R. China
| | - Hui Zhang
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun, P. R. China.,College of Food Science and Engineering Jilin University, Changchun, P. R. China
| | - Jing Zhu
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun, P. R. China.,College of Food Science and Engineering Jilin University, Changchun, P. R. China
| | - Jingbo Liu
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun, P. R. China.,College of Food Science and Engineering Jilin University, Changchun, P. R. China
| | - Ting Zhang
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun, P. R. China.,College of Food Science and Engineering Jilin University, Changchun, P. R. China
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