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Han C, Zheng Y, Huang S, Xu L, Zhou C, Sun Y, Wu Z, Wang Z, Pan D, Cao J, Xia Q. Exploring the binding mechanisms of thermally and ultrasonically induced molten globule-like β-lactoglobulin with heptanal as revealed by multi-spectroscopic techniques and molecular simulation. Int J Biol Macromol 2024; 263:130300. [PMID: 38395276 DOI: 10.1016/j.ijbiomac.2024.130300] [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: 01/24/2024] [Revised: 02/17/2024] [Accepted: 02/17/2024] [Indexed: 02/25/2024]
Abstract
This work employed the model protein β-lactoglobulin (BLG) to investigate the contribution of microstructural changes to regulating the interaction patterns between protein and flavor compounds through employing computer simulation and multi-spectroscopic techniques. The formation of molten globule (MG) state-like protein during the conformational evolution of BLG, in response to ultrasonic (UC) and heat (HT) treatments, was revealed through multi-spectroscopic characterization. Differential MG structures were distinguished by variations in surface hydrophobicity and the microenvironment of tryptophan residues. Fluorescence quenching measurements indicated that the formation of MG enhanced the binding affinity of heptanal to protein. LC-MS/MS and NMR revealed the covalent bonding between heptanal and BLG formed by Michael addition and Schiff-base reactions, and MG-like BLG exhibited fewer chemical shift residues. Molecular docking and molecular dynamics simulation confirmed the synergistic involvement of hydrophobic interactions and hydrogen bonds in shaping BLG-heptanal complexes thus promoting the stability of BLG structures. These findings indicated that the production of BLG-heptanal complexes was driven synergistically by non-covalent and covalent bonds, and their interaction processes were influenced by processes-induced formation of MG potentially tuning the release and retention behaviors of flavor compounds.
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Affiliation(s)
- Chuanhu Han
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, College of Food and Pharmaceutical Science, Ningbo University, Ningbo 315211, China
| | - Yuanrong Zheng
- State Key Laboratory of Dairy Biotechnology, Shanghai Engineering Research Center of Dairy Biotechnology, Dairy Research Institute, Bright Dairy & Food Co., Ltd., Shanghai 200436, China
| | - Siqiang Huang
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, College of Food and Pharmaceutical Science, Ningbo University, Ningbo 315211, China
| | - Le Xu
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, College of Food and Pharmaceutical Science, Ningbo University, Ningbo 315211, China
| | - Changyu Zhou
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, College of Food and Pharmaceutical Science, Ningbo University, Ningbo 315211, China
| | - Yangying Sun
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, College of Food and Pharmaceutical Science, Ningbo University, Ningbo 315211, China
| | - Zhen Wu
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, College of Food and Pharmaceutical Science, Ningbo University, Ningbo 315211, China
| | - Zhaoshan Wang
- Shandong Zhongke Food Co., LtD, Tai'an City 271229, China
| | - Daodong Pan
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, College of Food and Pharmaceutical Science, Ningbo University, Ningbo 315211, China
| | - Jinxuan Cao
- School of Food and Health, Beijing Technology and Business University, 11 Fucheng Road, Beijing 100048, China.
| | - Qiang Xia
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, College of Food and Pharmaceutical Science, Ningbo University, Ningbo 315211, China.
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Li Y, Liu H, Mu C, Gu J, Li C. Probing the interaction between encapsulated ethoxyquin and its β-cyclodextrin inclusion complex with bovine serum albumin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 304:123259. [PMID: 37634329 DOI: 10.1016/j.saa.2023.123259] [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: 05/25/2023] [Revised: 08/10/2023] [Accepted: 08/11/2023] [Indexed: 08/29/2023]
Abstract
Ethoxyquin (EQ) is a synthetic antioxidant that is derived from quinolines and found in many meat products. EQ is strictly regulated in feed due to its potential health implications. An investigation of the interaction mechanism between EQ and transporter protein before and after β-cyclodextrin (β-CD) encapsulation was conducted with the use of multi-spectroscopy, cyclic voltammetry, and molecular docking. EQ formed complexes with bovine serum albumin (BSA), and affected secondary structure and microenvironment polarity of BSA. However, at 298 K, EQ's fluorescence quenching constants decreased from (9.81 ± 0.05) × 103 L mol-1 to (4.94 ± 0.09) × 103 L mol-1, binding constants decreased from (10.28 ± 0.02) × 103 L mol-1 to (2.08 ± 0.07) × 103 L mol-1, after encapsulation in β-CD as well as the binding distance increased. β-CD contains part of EQ in its hydrophobic cavity, inhibiting its binding to BSA. β-CD inclusion complex prevented adverse effects of EQ on BSA conformation. However, β-CD encapsulation had no effect on EQ's antioxidant activity.
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Affiliation(s)
- Ye Li
- College of Chemistry and Chemical Engineering, Bohai University, Jinzhou 121013, PR China
| | - Hongrui Liu
- College of Chemistry and Chemical Engineering, Bohai University, Jinzhou 121013, PR China
| | - Chunyu Mu
- College of Chemistry and Chemical Engineering, Bohai University, Jinzhou 121013, PR China
| | - Jiali Gu
- College of Chemistry and Chemical Engineering, Bohai University, Jinzhou 121013, PR China.
| | - Chun Li
- College of Chemistry and Chemical Engineering, Bohai University, Jinzhou 121013, PR China
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Ding H, Han Z, Wang B, Wang Y, Ran Y, Zhang L, Li Y, Lu C, Lu X, Ma L. Effect of Direct Steam Injection and Instantaneous Ultra-High-Temperature (DSI-IUHT) Sterilization on the Physicochemical Quality and Volatile Flavor Components of Milk. Molecules 2023; 28:molecules28083543. [PMID: 37110776 PMCID: PMC10143338 DOI: 10.3390/molecules28083543] [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: 03/01/2023] [Revised: 03/31/2023] [Accepted: 04/13/2023] [Indexed: 04/29/2023] Open
Abstract
The effects of variations in the heat treatment process of milk on its quality and flavor are inevitable. This study investigated the effect of direct steam injection and instantaneous ultra-high-temperature (DSI-IUHT, 143 °C, 1-2 s) sterilization on the physicochemical properties, whey protein denaturation (WPD) rate, and volatile compounds (VCs) of milk. The experiment compared raw milk as a control with high-temperature short-time (HTST, 75 °C 15 s and 85 °C 15 s) pasteurization and indirect ultra-high-temperature (IND-UHT, 143 °C, 3-4 s) sterilization. The results showed no significant differences (p > 0.05) in physical stability between milk samples with different heat treatments. The DSI-IUHT and IND-UHT milks presented smaller particle sizes (p < 0.05) and more concentrated distributions than the HTST milk. The apparent viscosity of the DSI-IUHT milk was significantly higher than the other samples (p < 0.05) and is consistent with the microrheological results. The WPD of DSI-IUHT milk was 27.52% lower than that of IND-UHT milk. Solid-phase microextraction (SPME) and solvent-assisted flavor evaporation (SAFE) were combined with the WPD rates to analyze the VCs, which were positively correlated with ketones, acids, and esters and negatively associated with alcohols, heterocycles, sulfur, and aldehydes. The DSI-IUHT samples exhibited a higher similarity to raw and HTST milk than the IND-UHT samples. In summary, DSI-IUHT was more successful in preserving the milk's quality due to its milder sterilization conditions compared to IND-UHT. This study provides excellent reference data for the application of DSI-IUHT treatment in milk processing.
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Affiliation(s)
- Hao Ding
- School of Food and Health, Beijing Technology and Business University, Beijing 100048, China
| | - Zhaosheng Han
- School of Food and Health, Beijing Technology and Business University, Beijing 100048, China
| | - Bei Wang
- School of Food and Health, Beijing Technology and Business University, Beijing 100048, China
| | - Yadong Wang
- School of Food and Health, Beijing Technology and Business University, Beijing 100048, China
| | - Yawen Ran
- School of Food and Health, Beijing Technology and Business University, Beijing 100048, China
| | - Liebing Zhang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Yan Li
- School of Food and Health, Beijing Technology and Business University, Beijing 100048, China
| | - Chun Lu
- Junlebao Dairy Group Co., Ltd., Shijiazhuang 050221, China
| | - Xiaoli Lu
- Junlebao Dairy Group Co., Ltd., Shijiazhuang 050221, China
| | - Ligang Ma
- Junlebao Dairy Group Co., Ltd., Shijiazhuang 050221, China
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Pérez CB, Oliviero T, Fogliano V, Janssen H, Martins SIFS. Flavour them up! Exploring the challenges of flavoured plant‐based foods. FLAVOUR FRAG J 2023. [DOI: 10.1002/ffj.3734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Affiliation(s)
| | - Teresa Oliviero
- Department of Agrotechnology and Food Science Wageningen The Netherlands
| | - Vincenzo Fogliano
- Department of Agrotechnology and Food Science Wageningen The Netherlands
| | - Hans‐Gerd Janssen
- Department of Agrotechnology and Food Science Wageningen The Netherlands
- Unilever Foods Innovation Centre Wageningen The Netherlands
| | - Sara I. F. S. Martins
- Department of Agrotechnology and Food Science Wageningen The Netherlands
- AFB International EU Oss The Netherlands
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