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Liao G, Kang J, Zhang H, Cui Y, Xiong S, Liu Y. Covalent and non-covalent interaction of myofibrillar protein and cyanidin-3-O-glucoside: focus on structure, binding sites and in vitro digestion properties. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2024; 104:905-915. [PMID: 37699084 DOI: 10.1002/jsfa.12978] [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: 06/03/2023] [Revised: 08/23/2023] [Accepted: 09/09/2023] [Indexed: 09/14/2023]
Abstract
BACKGROUND The aim of this study was to investigate the effects of covalent and non-covalent interactions between myofibrillar protein (MP) and cyanidin-3-O-glucoside (C3G) on protein structure, binding sites, and digestion properties. Four methods of inducing covalent cross-linking were used in the preparation of MP-C3G conjugates, including tyrosinase-catalyzed oxidation, alkaline pH shift treatment, free radical grafting, and ultrasonic treatment. A comparison was made between MP-C3G conjugates and complexes, and the analysis included sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), C3G binding ratio, liquid chromatography-tandem mass spectrometry (LC-MS/MS), protein side-chain amino acids, circular dichroism spectroscopy, three-dimensional fluorescence, particle size, and in vitro simulated digestion. RESULTS Covalent bonding between C3G and amino acid side chains in MP was confirmed by LC-MS/MS. In covalent bonding, tryptophan residues, free amino groups and sulfhydryl groups were all implicated. Among the 22 peptides covalently modified by C3G, 30 modification sites were identified, located in lysine, histidine, tryptophan, arginine and cysteine. In vitro simulated digestion experiments showed that the addition of C3G significantly reduced the digestibility of MP, with the covalent conjugate showing lower digestibility than the non-covalent conjugate. Moreover, the digestibility of protein decreased more during intestinal digestion, possibly because covalent cross-linking of C3G and MP further inhibited trypsin targeting sites (lysine and arginine). CONCLUSION Covalent cross-linking of C3G with myofibrillar proteins significantly affected protein structure and reduced protein digestibility by occupying more trypsin binding sites. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Guangming Liao
- College of Food Science and Technology, Huazhong Agricultural University, National R & D Branch Center for Conventional Freshwater Fish Processing, Wuhan, People's Republic of China
| | - Jiajia Kang
- College of Food Science and Technology, Huazhong Agricultural University, National R & D Branch Center for Conventional Freshwater Fish Processing, Wuhan, People's Republic of China
| | - Haiping Zhang
- College of Food Science and Technology, Huazhong Agricultural University, National R & D Branch Center for Conventional Freshwater Fish Processing, Wuhan, People's Republic of China
| | - Ying Cui
- College of Food Science and Technology, Huazhong Agricultural University, National R & D Branch Center for Conventional Freshwater Fish Processing, Wuhan, People's Republic of China
| | - Shanbai Xiong
- College of Food Science and Technology, Huazhong Agricultural University, National R & D Branch Center for Conventional Freshwater Fish Processing, Wuhan, People's Republic of China
| | - Youming Liu
- College of Food Science and Technology, Huazhong Agricultural University, National R & D Branch Center for Conventional Freshwater Fish Processing, Wuhan, People's Republic of China
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Wen W, Li S, Wang J. The Effects of Tea Polyphenol on Chicken Protein Digestion and the Mechanism under Thermal Processing. Foods 2023; 12:2905. [PMID: 37569174 PMCID: PMC10418937 DOI: 10.3390/foods12152905] [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: 06/21/2023] [Revised: 07/12/2023] [Accepted: 07/29/2023] [Indexed: 08/13/2023] Open
Abstract
Meat product is the main food and major source of daily protein intake. Polyphenols are always introduced into many meat products during processing. Some complex interactions may occur between polyphenol and meat protein during the processing, especially thermal processing, which may affect the digestion of protein. In this experiment, chicken protein and tea polyphenol were interacted in simulated systems to explore the effects of the interaction between meat protein and polyphenols on the digestion of meat protein. The mechanism of tea polyphenol inhibiting chicken protein digestion was studied by analyzing the changes of chicken protein in intrinsic fluorescence, surface plasmon resonance (SPR), reactive sulfhydryl group, and solubility in different solvents. The results showed that the chicken protein digestion had a negative correlation with tea polyphenol concentration and interaction temperature, and the meat protein has a higher affinity to EGCG than protease. The mechanism of tea polyphenol inhibiting chicken protein digestion was related to the changing spatial structure of chicken protein and the decreasing activity of proteases. In the simulation system, at low-concentration tea polyphenol, the inhibition of the tea polyphenol on the digestibility of chicken protein might be mainly caused by the changes in chicken protein structure, while at high concentration, the changes in protein structure and the inhibition of proteases activity played a role together. This experiment revealed the effect and the mechanism of polyphenols on the digestion performance of meat protein and provide more references for the further application of polyphenols in meat processing.
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Affiliation(s)
- Wenjun Wen
- College of Food Science and Engineering, Shanxi Agriculture University, Shanxi 030801, China;
| | - Shijie Li
- Medical College, Nankai University, Tianjin 300350, China;
| | - Junping Wang
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, Tianjin 300457, China
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Jian F, Zhang Z, Li D, Luo F, Wu Q, Lu F, Dai Z, Nie M, Xu Y, Feng L, Gu Q. Evaluation of the digestibility and antioxidant activity of protein and lipid after mixing nuts based on in vitro and in vivo models. Food Chem 2023; 414:135706. [PMID: 36821922 DOI: 10.1016/j.foodchem.2023.135706] [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: 09/02/2022] [Revised: 01/30/2023] [Accepted: 02/13/2023] [Indexed: 02/20/2023]
Abstract
This study aimed to evaluate the change of digestibility and antioxidant activity of protein and lipid after mixing walnuts, cashews, and pistachios using in vitro and in vivo models. The results showed that mixed nuts significantly reduced the digested particle size and the degree of hydrolysis of protein and triacylglycerol compared to single nuts in vitro. As a consequence of co-digestion, bioaccessibility and antioxidant activity for amino acids and fatty acids were increased by 1.12-1.87 fold and 1.62-3.81 fold, respectively. In vivo studies, the mixed nuts diet increased the concentration of amino acids and fatty acids in the small intestine by 27.69%-158.26% and 18.13%-152.09%, respectively, and enhanced levels of antioxidant enzymes in the liver and serum, all without causing weight gain. These findings highlight the positive interaction between single and mixed nuts, where mixed nuts enhanced the digestibility and antioxidant activity of single nuts both in vitro and in vivo.
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Affiliation(s)
- Fangfang Jian
- Institute of Agro-product Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Zhongyuan Zhang
- Institute of Agro-product Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China; Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Nanjing 210014, China.
| | - Dajing Li
- Institute of Agro-product Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Fangjian Luo
- Institute of Agro-product Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Qihui Wu
- Institute of Agro-product Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Fengqin Lu
- Institute of Agro-product Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Zhuqing Dai
- Institute of Agro-product Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Meimei Nie
- Institute of Agro-product Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Yayuan Xu
- Institute of Agro-product Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Lei Feng
- Institute of Agro-product Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Qianhui Gu
- Three Squirrels Co., Ltd, Wuhu 241001, China
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Li S, Diao X, Mao X, Liu H, Shan K, Zhao D, Zhou G, Li C. The red, firm, non-exudative and pale, soft, exudative pork have different in vitro digestive properties of protein. Meat Sci 2023; 198:109110. [PMID: 36640717 DOI: 10.1016/j.meatsci.2023.109110] [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: 11/20/2022] [Revised: 12/25/2022] [Accepted: 01/09/2023] [Indexed: 01/13/2023]
Abstract
Pale, soft and exudative (PSE) meat has worse edible quality than red, firm and non-exudative (RFN) meat, but their difference in nutritional values is still unclear. In this study, the differences in digestive properties between PSE and RFN pork were explored, and the potential mechanisms were analyzed in terms of protein conformation. The PSE pork showed significantly higher digestibility and smaller particle size compared with RFN pork (P < 0.05) after gastrointestinal digestion. Mechanistically, the lower viscosity was seen in the PSE pork digestion system. The protein structure of PSE pork was disordered with weaker hydrogen bond and ionic bond before and after heating. In addition, the protein (mainly salt-soluble protein) of PSE pork was highly oxidized. The results suggested that higher level of oxidation in PSE pork leads to the destruction of the molecular forces, resulting in the impaired protein conformation and disordered protein structure. The serial changes caused the meat proteins more accessible to digestive enzymes, thus improving the digestibility. The findings provide new insights into the evaluating the quality of PSE meat.
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Affiliation(s)
- Shanshan Li
- Key Laboratory of Meat Processing and Quality Control, MOE; Key Laboratory of Meat Processing, MOA; Jiangsu Synergetic Innovation Center of Meat Processing and Quality Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Xinyue Diao
- Key Laboratory of Meat Processing and Quality Control, MOE; Key Laboratory of Meat Processing, MOA; Jiangsu Synergetic Innovation Center of Meat Processing and Quality Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Xinrui Mao
- Key Laboratory of Meat Processing and Quality Control, MOE; Key Laboratory of Meat Processing, MOA; Jiangsu Synergetic Innovation Center of Meat Processing and Quality Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Hui Liu
- Key Laboratory of Meat Processing and Quality Control, MOE; Key Laboratory of Meat Processing, MOA; Jiangsu Synergetic Innovation Center of Meat Processing and Quality Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Kai Shan
- Key Laboratory of Meat Processing and Quality Control, MOE; Key Laboratory of Meat Processing, MOA; Jiangsu Synergetic Innovation Center of Meat Processing and Quality Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Di Zhao
- Key Laboratory of Meat Processing and Quality Control, MOE; Key Laboratory of Meat Processing, MOA; Jiangsu Synergetic Innovation Center of Meat Processing and Quality Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Guanghong Zhou
- Key Laboratory of Meat Processing and Quality Control, MOE; Key Laboratory of Meat Processing, MOA; Jiangsu Synergetic Innovation Center of Meat Processing and Quality Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Chunbao Li
- Key Laboratory of Meat Processing and Quality Control, MOE; Key Laboratory of Meat Processing, MOA; Jiangsu Synergetic Innovation Center of Meat Processing and Quality Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China.
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Zhang F, Yue Q, Li X, Kong B, Sun F, Cao C, Zhang H, Liu Q. Mechanisms underlying the effects of ultrasound-assisted alkaline extraction on the structural properties and in vitro digestibility of Tenebrio molitor larvae protein. ULTRASONICS SONOCHEMISTRY 2023; 94:106335. [PMID: 36821935 PMCID: PMC9982000 DOI: 10.1016/j.ultsonch.2023.106335] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 02/12/2023] [Accepted: 02/13/2023] [Indexed: 05/13/2023]
Abstract
Edible insects have been considered as a sustainable and novel protein source to replace animal-derived proteins. The present study aimed to extract Tenebrio molitor larvae proteins (TMP) using ultrasound-assisted alkaline extraction (UAE). Effects of different UAE times (10, 20, 30, 40, and 50 min) on the structural properties and in vitro digestibility of TMP were comparatively investigated with the traditional alkaline extraction method. The results revealed that ultrasonication could effectively alter the secondary/tertiary structures and thermal stability of TMP during UAE. The molecular unfolding and subsequent aggregation of TMP during UAE were mainly attributed to the formation of disulfide bonds and hydrophobic interactions. Moreover, TMP extracted by UAE had higher in vitro digestibility and digestion kinetics than those extracted without ultrasound, and the intermediate UAE time (30 min) was the optimal ultrasound parameter. However, longer UAE times (40 and 50 min) lowered the digestibility of TMP due to severe protein aggregation. The present work provides a potential strategy for the extraction of TMP with higher nutritional values.
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Affiliation(s)
- Fengxue Zhang
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Qiang Yue
- Heilongjiang Open University, Harbin, Heilongjiang 150080, China
| | - Xin Li
- Sharable Platform of Large-Scale Instruments & Equipments, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Baohua Kong
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Fangda Sun
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Chuanai Cao
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Hongwei Zhang
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Qian Liu
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Heilongjiang Green Food Science & Research Institute, Harbin, Heilongjiang 150028, China.
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Wang Y, Liu J, Zhang Z, Meng X, Yang T, Shi W, He R, Ma H. Insights into Ultrasonication Treatment on the Characteristics of Cereal Proteins: Functionality, Conformational and Physicochemical Characteristics. Foods 2023; 12:foods12050971. [PMID: 36900488 PMCID: PMC10000784 DOI: 10.3390/foods12050971] [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: 02/08/2023] [Accepted: 02/22/2023] [Indexed: 03/03/2023] Open
Abstract
BACKGROUND It would be impossible to imagine a country where cereals and their byproducts were not at the peak of foodstuff systems as a source of food, fertilizer, or for fiber and fuel production. Moreover, the production of cereal proteins (CPs) has recently attracted the scientific community's interest due to the increasing demands for physical wellbeing and animal health. However, the nutritional and technological enhancements of CPs are needed to ameliorate their functional and structural properties. Ultrasonic technology is an emerging nonthermal method to change the functionality and conformational characteristics of CPs. Scope and approach: This article briefly discusses the effects of ultrasonication on the characteristics of CPs. The effects of ultrasonication on the solubility, emulsibility, foamability, surface-hydrophobicity, particle-size, conformational-structure, microstructural, enzymatic-hydrolysis, and digestive properties are summarized. CONCLUSIONS The results demonstrate that ultrasonication could be used to enhance the characteristics of CPs. Proper ultrasonic treatment could improve functionalities such as solubility, emulsibility, and foamability, and is a good method for altering protein structures (including surface hydrophobicity, sulfhydryl and disulfide bonds, particle size, secondary and tertiary structures, and microstructure). In addition, ultrasonic treatment could effectively promote the enzymolytic efficiency of CPs. Furthermore, the in vitro digestibility was enhanced after suitable sonication treatment. Therefore, ultrasonication technology is a useful method to modify cereal protein functionality and structure for the food industry.
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Affiliation(s)
- Yang Wang
- College of Tourism and Cooking & College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China
| | - Jiarui Liu
- College of Tourism and Cooking & College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China
| | - Zhaoli Zhang
- College of Tourism and Cooking & College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China
- Correspondence: (Z.Z.); (R.H.); Tel.: +86-(511)-8878-0174 (R.H.)
| | - Xiangren Meng
- College of Tourism and Cooking & College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China
| | - Tingxuan Yang
- College of Tourism and Cooking & College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China
| | - Wangbin Shi
- College of Tourism and Cooking & College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China
| | - Ronghai He
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
- Correspondence: (Z.Z.); (R.H.); Tel.: +86-(511)-8878-0174 (R.H.)
| | - Haile Ma
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
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A structural explanation for protein digestibility changes in different food matrices. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2022.108281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Ultrasound: A reliable method for regulating food component interactions in protein-based food matrices. Trends Food Sci Technol 2022. [DOI: 10.1016/j.tifs.2022.08.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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