1
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Zhang Y, Lin X, Wang Y, Ye W, Lin Y, Zhang Y, Zhang K, Zhao K, Guo H. The non-covalent and covalent interactions of whey proteins and saccharides: influencing factor and utilization in food. Crit Rev Food Sci Nutr 2024:1-15. [PMID: 38961829 DOI: 10.1080/10408398.2024.2373386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/05/2024]
Abstract
During the application of Whey proteins (WPs), they often have complex interactions with saccharides (Ss), another important biopolymer in food substrate. The texture and sensory qualities of foods containing WPs and Ss are largely influenced by the interactions of WPs-Ss. Moreover, the combination of WPs and Ss is possible to produce many excellent functional properties including emulsifying properties and thermal stability. However, the interactions between WPs-Ss are complex and susceptible to some processing conditions. In addition, with different interaction ways, they can be applied in different fields. Therefore, the non-covalent interaction mechanisms between WPs-Ss are firstly summarized in detail, including electrostatic interaction, hydrogen bond, hydrophobic interaction, van der Waals force. Furthermore, the existence modes of WPs-Ss are introduced, including complex coacervates, soluble complexes, segregation, and co-solubility. The covalent interactions of WPs-Ss in food applications are often formed by Maillard reaction (dry or wet heat reaction) and occasionally through enzyme induction. Then, two common influencing factors, pH and temperature, on non-covalent/covalent bonds are introduced. Finally, the applications of WPs-Ss complexes and conjugations in improving WP stability, delivery system, and emulsification are described. This review can improve our understanding of the interactions between WPs-Ss and further promote their wider application.
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Affiliation(s)
- Yafei Zhang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Xiaoya Lin
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Yiran Wang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Wenhui Ye
- Inner Mongolia Yili Industrial Group Company Limited, Hohhot, China
| | - Yingying Lin
- Key Laboratory of Precision Nutrition and Food Quality, Department of Nutrition and Health, China Agricultural University, Beijing, China
- Food Laboratory of Zhongyuan, Luohe, China
| | - Yuning Zhang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Kai Zhang
- Key Laboratory of Food Nutrition and Safety, Ministry of Education, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
| | - Kaixuan Zhao
- Collage of Food Science and Technology, Hebei Agricultural University, Hebei, China
| | - Huiyuan Guo
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- Key Laboratory of Precision Nutrition and Food Quality, Department of Nutrition and Health, China Agricultural University, Beijing, China
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2
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Al-Shabib NA, Khan JM, Malik A, AlAmri A, Rehman MT, AlAjmi MF, Husain FM. Integrated spectroscopic and computational analyses unravel the molecular interaction of pesticide azinphos-methyl with bovine beta-lactoglobulin. J Mol Recognit 2024; 37:e3086. [PMID: 38686702 DOI: 10.1002/jmr.3086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 03/25/2024] [Accepted: 04/17/2024] [Indexed: 05/02/2024]
Abstract
Organophosphorus are typically hazardous chemicals used in the pharmaceutical, agricultural, and other industries. They pose a serious risk to human life and can be fatal upon direct exposure. Hence, studying the interaction between such compounds with proteins is crucial for environmental, health, and food safety. In this study, we investigated the interaction mechanism between azinphos-methyl (AZM) and β-lactoglobulin (BLG) at pH 7.4 using a combination of biophysical techniques. Intrinsic fluorescence investigations revealed that BLG fluorescence was quenched in the presence of increasing AZM concentrations. The quenching mechanism was identified as static, as evidenced by a decrease in the fluorescence quenching constant (1.25 × 104, 1.18 × 104, and 0.86 × 104 M-1) with an increase in temperatures. Thermodynamic calculations (ΔH > 0; ΔS > 0) affirmed the formation of a complex between AZM and BLG through hydrophobic interactions. The BLG's secondary structure was found to be increased due to AZM interaction. Ultraviolet -visible spectroscopy data showed alterations in BLG conformation in the presence of AZM. Molecular docking highlighted the significant role of hydrophobic interactions involving residues such as Val43, Ile56, Ile71, Val92, Phe105, and Met107 in the binding between BLG and AZM. A docking energy of -6.9 kcal mol-1, and binding affinity of 1.15 × 105 M-1 suggest spontaneous interaction between AZM and BLG with moderate to high affinity. These findings underscore the potential health risks associated with the entry of AZM into the food chain, emphasizing the need for further consideration of its impact on human health.
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Affiliation(s)
- Nasser Abdulatif Al-Shabib
- Department of Food Science and Nutrition, Faculty of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Javed Masood Khan
- Department of Food Science and Nutrition, Faculty of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Ajamaluddin Malik
- Department of Biochemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Abdulaziz AlAmri
- Department of Biochemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Md Tabish Rehman
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Mohamed F AlAjmi
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Fohad Mabood Husain
- Department of Food Science and Nutrition, Faculty of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
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3
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Yamazaki S, Takahashi K, Matsuda Y. Tag-free protein modification by lipoate ligase A: exploring substrate tolerance. ANAL SCI 2024; 40:1111-1119. [PMID: 38504072 DOI: 10.1007/s44211-024-00534-6] [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: 01/13/2024] [Accepted: 02/10/2024] [Indexed: 03/21/2024]
Abstract
This study delves into the functional intricacies of lipoate ligase A (LplA), an enzyme showing great promise in bioconjugation due to its unique capacity for introducing azido groups into proteins without requiring a genetic tag. We aimed to enhance the understanding of LplA's functionality, particularly its substrate tolerance and the reliability of various analytical techniques. A pivotal aspect of our approach was incorporating azido groups into a range of proteins, followed by the addition of the fluorescent molecule Cy3 via click chemistry. Analysis of fluorescent intensity in the altered proteins indicated varying degrees of conjugation. Additionally, phenyl resin-based RP-HPLC facilitated effective separation of modified proteins, unmodified proteins, and remaining fluorescent tags post-separation. SASA analysis provided insights into conjugation trends, guiding the identification of proteins amenable to LplA's tag-free modification. Our findings demonstrate LplA's broad substrate tolerability for protein modification.
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Affiliation(s)
- Shunsuke Yamazaki
- Ajinomoto Co., Inc., 1-1 Suzuki-cho, Kawasaki, Kanagawa, 210-8681, Japan.
| | | | - Yutaka Matsuda
- Ajinomoto Co., Inc., 1-1 Suzuki-cho, Kawasaki, Kanagawa, 210-8681, Japan.
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4
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Pham PC, Taylor M, Nguyen GTH, Beltran J, Bennett JL, Ho J, Donald WA. Binding of Per- and Polyfluoroalkyl Substances to β-Lactoglobulin from Bovine Milk. Chem Res Toxicol 2024; 37:757-770. [PMID: 38625865 DOI: 10.1021/acs.chemrestox.4c00021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/18/2024]
Abstract
Per- and polyfluoroalkyl substances (PFAS) are known for their high environmental persistence and potential toxicity. The presence of PFAS has been reported in many dairy products. However, the mechanisms underlying the accumulation of PFAS in these products remain unclear. Here, we used native mass spectrometry and molecular dynamics simulations to probe the interactions between 19 PFAS of environmental concern and two isoforms of the major bovine whey protein β-lactoglobulin (β-LG). We observed that six of these PFAS bound to both protein isoforms with low- to mid-micromolar dissociation constants. Based on quantitative, competitive binding experiments with endogenous ligands, PFAS can bind orthosterically and preferentially to β-LG's hydrophobic ligand-binding calyx. β-Cyclodextrin can also suppress binding of PFAS to β-LG owing to the ability of β-cyclodextrin to directly sequester PFAS from solution. This research sheds light on PFAS-β-LG binding, suggesting that such interactions could impact lipid-fatty acid transport in bovine mammary glands at high PFAS concentrations. Furthermore, our results highlight the potential use of β-cyclodextrin in mitigating PFAS binding, providing insights toward the development of strategies to reduce PFAS accumulation in dairy products and other biological systems.
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Affiliation(s)
- P Chi Pham
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Mackenzie Taylor
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Giang T H Nguyen
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Jeunesse Beltran
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Jack L Bennett
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Junming Ho
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - William A Donald
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
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5
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Meng T, Wang Z, Zhang H, Zhao Z, Huang W, Xu L, Liu M, Li J, Yan H. In Silico Investigations on the Synergistic Binding Mechanism of Functional Compounds with Beta-Lactoglobulin. Molecules 2024; 29:956. [PMID: 38474468 DOI: 10.3390/molecules29050956] [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: 12/30/2023] [Revised: 02/03/2024] [Accepted: 02/20/2024] [Indexed: 03/14/2024] Open
Abstract
Piceatannol (PIC) and epigallocatechin gallate (EGCG) are polyphenolic compounds with applications in the treatment of various diseases such as cancer, but their stability is poor. β-lactoglobulin (β-LG) is a natural carrier that provides a protective effect to small molecule compounds and thus improves their stability. To elucidate the mechanism of action of EGCG, PIC, and palmitate (PLM) in binding to β-LG individually and jointly, this study applied molecular docking and molecular dynamics simulations combined with in-depth analyses including noncovalent interaction (NCI) and binding free energy to investigate the binding characteristics between β-LG and compounds of PIC, EGCG, and PLM. Simulations on the binary complexes of β-LG + PIC, β-LG + EGCG, and β-LG + PLM and ternary complexes of (β-LG + PLM) + PIC, (β-LG + PLM) + EGCG, β-LG + PIC) + EGCG, and (β-LG + EGCG) + PIC were performed for comparison and characterizing the interactions between binding compounds. The results demonstrated that the co-bound PIC and EGCG showed non-beneficial effects on each other. However, the centrally located PLM was revealed to be able to adjust the binding conformation of PIC, which led to the increase in binding affinity with β-LG, thus showing a synergistic effect on the co-bound PIC. The current study of β-LG co-encapsulated PLM and PIC provides a theoretical basis and research suggestions for improving the stability of polyphenols.
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Affiliation(s)
- Tong Meng
- School of Pharmaceutical Sciences, Liaocheng University, Liaocheng 252059, China
| | - Zhiguo Wang
- Institute of Ageing Research, School of Basic Medical Sciences, Hangzhou Normal University, Hangzhou 311121, China
| | - Hao Zhang
- School of Pharmaceutical Sciences, Liaocheng University, Liaocheng 252059, China
| | - Zhen Zhao
- School of Pharmaceutical Sciences, Liaocheng University, Liaocheng 252059, China
| | - Wanlin Huang
- School of Basic Medical Sciences, Hangzhou Normal University, Hangzhou 311121, China
| | - Liucheng Xu
- School of Basic Medical Sciences, Hangzhou Normal University, Hangzhou 311121, China
| | - Min Liu
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China
| | - Jun Li
- School of Pharmaceutical Sciences, Liaocheng University, Liaocheng 252059, China
| | - Hui Yan
- School of Pharmaceutical Sciences, Liaocheng University, Liaocheng 252059, China
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6
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Kamel EM, Bin-Ammar A, El-Bassuony AA, Alanazi MM, Altharawi A, Ahmeda AF, Alanazi AS, Lamsabhi AM, Mahmoud AM. Molecular modeling and DFT studies on the antioxidant activity of Centaurea scoparia flavonoids and molecular dynamics simulation of their interaction with β-lactoglobulin. RSC Adv 2023; 13:12361-12374. [PMID: 37091601 PMCID: PMC10116863 DOI: 10.1039/d3ra01661g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 04/10/2023] [Indexed: 04/25/2023] Open
Abstract
Plants of the genus Centaurea have been widely used as natural therapeutics in different countries. This study investigated the antioxidant-structure activity relationship of eight flavonoids isolated from Centaurea scoparia using DFT studies and in vitro radical scavenging and xanthine oxidase (XO) inhibition assays, and to correlate the theoretical values with the experimental findings. Docking analysis was carried out to explore the binding modes of the isolated phytochemicals with XO and bovine β-lactoglobulin (BLG). Interactions of the isolated compounds with BLG were studied using molecular dynamics (MD) simulations which revealed the involvement of hydrogen bonding. The root-mean-square deviation (RMSD) of BLG and BLG-flavonoid complexes reached equilibrium and fluctuated during the 10 ns MD simulations. The radius of gyration (Rg) and solvent accessible surface area (SASA) revealed that various systems were stabilized at approximately 2500 ps. In addition, the RMS fluctuations profile indicated that the ligand's active site exerted rigidity behavior during the simulation. The hydrogen atom transfer (HAT) and the energies of hydrogen abstractions were estimated by calculating the bond dissociation enthalpy (BDE) of O-H in gas phase and water. The isolated compounds showed radical scavenging and XO inhibitory activities along with binding affinity with XO as revealed in silico. The BDE was linked to the radical scavenging processes occurring in polar solvents. These processes are single electron transfer followed by proton transfer (SET-PT) and sequential proton loss electron transfer (SPLET). Our calculations indicated the agreement between the calculated results and the experimentally measured antioxidant activity of the flavonoids isolated from C. scoparia.
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Affiliation(s)
- Emadeldin M Kamel
- Chemistry Department, Faculty of Science, Beni-Suef University Beni-Suef 62514 Egypt
| | - Albandari Bin-Ammar
- Department of Clinical Nutrition, College of Applied Medical Sciences, University of Hail Saudi Arabia
| | - Ashraf A El-Bassuony
- Chemistry Department, Faculty of Science, Beni-Suef University Beni-Suef 62514 Egypt
| | - Mohammed M Alanazi
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University Riyadh 11451 Saudi Arabia
| | - Ali Altharawi
- Department of Pharmaceutical Chemistry, College of Pharmacy, Prince Sattam Bin Abdulaziz University Al-Kharj 11942 Saudi Arabia
| | - Ahmad F Ahmeda
- Department of Basic Medical Sciences, College of Medicine, Ajman University Ajman 346 United Arab Emirates
- Center of Medical and Bio-allied Health Sciences Research, Ajman University Ajman 346 United Arab Emirates
| | - Ashwag S Alanazi
- Department of Pharmaceutical Sciences, College of Pharmacy, Princess Nourah bint Abdulrahman University Riyadh Saudi Arabia
| | - Al Mokhtar Lamsabhi
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid Campus de Excelencia UAM-CSIC Cantoblanco Madrid 28049 Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid Madrid 28049 Spain
| | - Ayman M Mahmoud
- Physiology Division, Zoology Department, Faculty of Science, Beni-Suef University Salah Salim St. Beni-Suef 62514 Egypt
- Department of Life Sciences, Faculty of Science and Engineering, Manchester Metropolitan University Manchester M1 5GD UK
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7
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Cheng H, Chen W, Jiang J, Khan MA, Wusigale, Liang L. A comprehensive review of protein-based carriers with simple structures for the co-encapsulation of bioactive agents. Compr Rev Food Sci Food Saf 2023; 22:2017-2042. [PMID: 36938993 DOI: 10.1111/1541-4337.13139] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 01/28/2023] [Accepted: 02/21/2023] [Indexed: 03/21/2023]
Abstract
The rational design and fabrication of edible codelivery carriers are important to develop functional foods fortified with a plurality of bioactive agents, which may produce synergistic effects in increasing bioactivity and functionality to target specific health benefits. Food proteins possess considerable functional attributes that make them suitable for the delivery of a single bioactive agent in a wide range of platforms. Among the different types of protein-based carriers, protein-ligand nanocomplexes, micro/nanoparticles, and oil-in-water (O/W) emulsions have increasingly attracted attention in the codelivery of multiple bioactive agents, due to the simple and convenient preparation procedure, high stability, matrix compatibility, and dosage flexibility. However, the successful codelivery of bioactive agents with diverse physicochemical properties by using these simple-structure carriers is a daunting task. In this review, some effective strategies such as combined functional properties of proteins, self-assembly, composite, layer-by-layer, and interfacial engineering are introduced to redesign the carrier structure and explore the encapsulation of multiple bioactive agents. It then highlights success stories and challenges in the co-encapsulation of multiple bioactive agents within protein-based carriers with a simple structure. The partition, protection, and release of bioactive agents in these protein-based codelivery carriers are considered and discussed. Finally, safety and application as well as challenges of co-encapsulated bioactive agents in the food industry are also discussed. This work provides a state-of-the-art overview of protein-based particles and O/W emulsions in co-encapsulating bioactive agents, which is essential for the design and development of novel functional foods containing multiple bioactive agents.
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Affiliation(s)
- Hao Cheng
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China.,School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Wanwen Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China.,School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Jiang Jiang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China.,School of Food Science and Technology, Jiangnan University, Wuxi, China
| | | | - Wusigale
- Key Laboratory of Dairy Biotechnology and Engineering, Ministry of Education, Inner Mongolia Agricultural University, Hohhot, China
| | - Li Liang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China.,School of Food Science and Technology, Jiangnan University, Wuxi, China
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8
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Axelrod RD, Baumgartner J, Beyrer M, Mathys A. Experimental and simulation-based investigation of the interplay between factor gradients following pulsed electric field treatments triggering whey protein aggregation. J FOOD ENG 2023. [DOI: 10.1016/j.jfoodeng.2022.111308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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9
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Nash S, Vachet RW. Gas-Phase Unfolding of Protein Complexes Distinguishes Conformational Isomers. J Am Chem Soc 2022; 144:22128-22139. [PMID: 36414315 DOI: 10.1021/jacs.2c09573] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Proteins can adopt different conformational states that are important for their biological function and, in some cases, can be responsible for their dysfunction. The essential roles that proteins play in biological systems make distinguishing the structural differences between these conformational states both fundamentally and practically important. Here, we demonstrate that collision-induced unfolding (CIU), in combination with ion mobility-mass spectrometry (IM-MS) measurements, distinguish subtly different conformational states for protein complexes. Using the open and closed states of the β-lactoglobulin (βLG) dimer as a model, we show that these two conformational isomers unfold during collisional activation to generate distinct states that are readily separated by IM-MS. Extensive molecular modeling of the CIU process reproduces the distinct unfolding intermediates and identifies the molecular details that explain why the two conformational states unfold in distinct ways. Strikingly, the open conformational state forms new electrostatic interactions upon collisional heating, while the closed state does not. These newly formed electrostatic interactions involve residues on the loop differentially positioned in the two βLG conformational isomers, highlighting that gas-phase unfolding pathways reflect aspects of solution structure. This combination of experiment and theory provides a path forward for distinguishing subtly different conformational isomers for protein complexes via gas-phase unfolding experiments. Our results also have implications for understanding how protein complexes dissociate in the gas phase, indicating that current models need to be refined to explain protein complex dissociation.
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Affiliation(s)
- Stacey Nash
- Molecular and Cellular Biology Program, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Richard W Vachet
- Molecular and Cellular Biology Program, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States.,Department of Chemistry, University of Massachusetts Amherst, Amherst, Massachusetts 01003 United States
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10
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Chakraborty G. Red emitting fluorogenic dye as an efficient turn-on probe for milk allergen. Int J Biol Macromol 2022; 221:1527-1535. [PMID: 36122782 DOI: 10.1016/j.ijbiomac.2022.09.130] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 09/14/2022] [Accepted: 09/14/2022] [Indexed: 11/24/2022]
Abstract
Development of simple, fast and non-destructive technique such as fluorescence based method for the quantification of milk allergens in various dairy products is a highly rewarding task. In this contribution, a red emitting fluorogenic dye, quinaldine red (QR) is reported for the detection and quantification of a milk allergen, beta lactoglobulin (β-LG) in milk and whey matrices, utilizing its high selectivity and sensitivity towards β-LG. Detail spectroscopic investigation reveals that binding of QR to the hydrophobic calyx site of β-LG protein substantially reduces the torsional agility and propensity of TICT state formation of QR, rendering the dye highly fluorescent in nature. This enables estimation of β-LG with LOD 52.1(±0.9) nM in buffer solution and 0.21(±0.01) μM in 5 % bovine milk matrix respectively. Additionally, high selectivity and sensitivity, excellent repeatability, quick response, and emission in the biologically favorable red spectral region make QR based fluorometric quantification of β-LG a highly attractive choice. Finally, the estimated β-LG concentrations in milk and whey matrices from fluorometric titration and densitometry methods are found to match excellently with each other, suggesting potential of QR as an efficient turn-on fluorescent probe for the quantification of β-LG (milk allergen) in various dairy products.
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Affiliation(s)
- Goutam Chakraborty
- Laser and Plasma Technology Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
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11
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Guo J, Zeng M, Chen J. Binding of Dual‐flavor Compounds by Soy Protein Isolate in Aqueous Model Systems. Int J Food Sci Technol 2022. [DOI: 10.1111/ijfs.15983] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jun Guo
- College of Biology and Food science Suzhou University Suzhou 234000 PR China
- State Key Laboratory of Food Science and Technology JiangNan University Wuxi 214122 Jiangsu PR China
- International Joint Laboratory on Food Safety Jiangnan University Wuxi Jiangsu 214122 PR China
| | - Maomao Zeng
- State Key Laboratory of Food Science and Technology JiangNan University Wuxi 214122 Jiangsu PR China
- International Joint Laboratory on Food Safety Jiangnan University Wuxi Jiangsu 214122 PR China
| | - Jie Chen
- State Key Laboratory of Food Science and Technology JiangNan University Wuxi 214122 Jiangsu PR China
- International Joint Laboratory on Food Safety Jiangnan University Wuxi Jiangsu 214122 PR China
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12
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Axelrod R, Beyrer M, Mathys A. Impact of the electric field intensity and treatment time on whey protein aggregate formation. J Dairy Sci 2022; 105:6589-6600. [DOI: 10.3168/jds.2021-21395] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 03/29/2022] [Indexed: 11/19/2022]
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13
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Antioxidant activity, stability, in vitro digestion and cytotoxicity of two dietary polyphenols co-loaded by β-lactoglobulin. Food Chem 2022; 371:131385. [PMID: 34808778 DOI: 10.1016/j.foodchem.2021.131385] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 10/09/2021] [Accepted: 10/11/2021] [Indexed: 11/22/2022]
Abstract
The combination of multiple dietary polyphenols may have synergistic beneficial effects. And the beneficial effects can be further improved by the encapsulation of proteins. The interactions of procyanidin B2 (PB2) and/or dihydromyricetin (DMY) with β-lactoglobulin (β-LG) were investigated using multi-spectroscopic techniques and molecular docking. The structural change of β-LG in the presence of PB2 and/or DMY was demonstrated by dynamic light scattering, Fourier transform infrared spectroscopy and circular dichroism spectroscopy. Response surface analysis was used to optimize the synergistic antioxidant activity between PB2 and DMY. Besides, the antioxidant activity, stability, in vitro digestion and cytotoxicity of PB2 and DMY in the binary and ternary systems were investigated. These studies will elucidate the interaction mechanism of PB2 and/or DMY with β-LG. The research results can provide theoretical support for the development of functional foods and beverages with synergistic activity, improved stability and bioaccessibility, thereby promoting human health and preventing diseases.
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14
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Ozleyen A, Cinar ZO, Karav S, Bayraktar A, Arslan A, Kayili HM, Salih B, Tumer TB. Biofortified Whey/Deglycosylated Whey and Chickpea Protein Matrices: Functional Enrichment by Black Mulberry Polyphenols. PLANT FOODS FOR HUMAN NUTRITION (DORDRECHT, NETHERLANDS) 2022; 77:51-61. [PMID: 34850338 DOI: 10.1007/s11130-021-00943-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/23/2021] [Indexed: 06/13/2023]
Abstract
Morus nigra L. (black mulberry-BM) is a promising nutraceutical fruit containing biologically active polyphenols like anthocyanins, proanthocyanidins, catechins, and stilbenes, with well-established anti-inflammatory, antidiabetic, anti-obesity, and anticancer biofunctions. However, these health-promoting properties in raw fruit are greatly masked due to the presence of soluble and insoluble carbohydrates in excess amounts restricting daily intake of the required dose to achieve targeted effects. In the current study, different protein sources (defatted whey and chickpea flours) were optimized through different conditions to capture polyphenols from BM juice while diminishing its glucose content. To optimize polyphenol-protein interactions, various pHs (3.7, 4.2, and 4.7), matrix concentrations (20, 50, and 80 g protein/L), and incubation times (5, 20, and 45 min) were tested. In the present work, optimized BM polyphenol enriched whey matrix inhibited pro-inflammatory mediators and promoted Nrf-2 dependent cytoprotective enzyme expressions in lipopolysaccharide (LPS) induced macrophages at low doses. In addition, whey proteins were also subjected to an enzymatic deglycosylation process by using recently identified EndoBI-1 enzyme for the specific cleavage of N-glycan core in all glycan types including high mannoses, hybrids as well as complex glycans found on defatted whey proteins. After this process, the polyphenol sorption capacity of deglycosylated whey proteins was found to be significantly higher (37%) than the capacity of non-treated normal whey protein under optimized conditions. In conclusion, deglycosylation of protein matrices could be a novel strategy for efficient sorption/concentration of polyphenols from fruits and vegetables, however, more detailed studies are needed to understand this effect.
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Affiliation(s)
- Adem Ozleyen
- Graduate Program of Biomolecular Sciences, School of Graduate Studies, Canakkale Onsekiz Mart University, 17020, Çanakkale, Turkey
- School of Chemistry, University of Leicester, Leicester, LE1 7RH, UK
| | - Zeynep Ozlem Cinar
- Graduate Program of Molecular Biology and Genetics, School of Graduate Studies, Canakkale Onsekiz Mart University, 17020, Çanakkale, Turkey
| | - Sercan Karav
- Department of Molecular Biology and Genetics, Faculty of Arts and Science, Çanakkale Onsekiz Mart University, 17020, Çanakkale, Turkey
| | - Ayse Bayraktar
- Graduate Program of Biomolecular Sciences, School of Graduate Studies, Canakkale Onsekiz Mart University, 17020, Çanakkale, Turkey
| | - Aysenur Arslan
- Graduate Program of Molecular Biology and Genetics, School of Graduate Studies, Canakkale Onsekiz Mart University, 17020, Çanakkale, Turkey
| | - H Mehmet Kayili
- Department of Biomedical Engineering, Faculty of Engineering, Karabuk University, 78000, Karabuk, Turkey
| | - Bekir Salih
- Department of Chemistry, Faculty of Science, Hacettepe University, 06500, Ankara, Turkey
| | - Tugba Boyunegmez Tumer
- Department of Molecular Biology and Genetics, Faculty of Arts and Science, Çanakkale Onsekiz Mart University, 17020, Çanakkale, Turkey.
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15
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Binding analysis of the curcumin-based synthetic alpha-glucosidase inhibitors to beta-lactoglobulin as potential vehicle carrier for antidiabetic drugs. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2022. [DOI: 10.1007/s13738-021-02323-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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16
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Santa Rosa LN, Rezende JDP, Coelho YL, Mendes TAO, da Silva LHM, Pires ACDS. β-lactoglobulin conformation influences its interaction with caffeine. FOOD BIOSCI 2021. [DOI: 10.1016/j.fbio.2021.101418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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17
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Liu T, Liu M, Liu H, Ren Y, Zhao Y, Yan H, Wang Q, Zhang N, Ding Z, Wang Z. Co-encapsulation of (-)-epigallocatechin-3-gallate and piceatannol/oxyresveratrol in β-lactoglobulin: effect of ligand-protein binding on the antioxidant activity, stability, solubility and cytotoxicity. Food Funct 2021; 12:7126-7144. [PMID: 34180492 DOI: 10.1039/d1fo00481f] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The co-encapsulation of multiple bioactive components in a carrier may produce synergistic effects and improve health benefits. In this study, the interactions of β-lactoglobulin (β-LG) with epigallocatechin-3-gallate (EGCG) and/or piceatannol (PIC)/oxyresveratrol (OXY) were investigated by multispectroscopic techniques, isothermal titration calorimetry, and molecular docking. The static quenching mechanism of β-LG by EGCG, PIC and OXY was confirmed by fluorescence spectroscopy and UV-vis absorption difference spectroscopy. The binding sites of these three polyphenols in β-LG were identified by site marking fluorescence experiments and molecular docking. The thermodynamic parameters of the β-LG + EGCG/PIC/OXY binary complex and β-LG + EGCG + PIC/OXY ternary complex were obtained from fluorescence data and used to analyze the main driving force for complex formation. The exothermic binding process was further confirmed by isothermal titration calorimetry. The α-helical content, particle size and morphology of free and ligand-bound β-LG were determined by circular dichroism spectroscopy, dynamic light scattering and transmission electron microscopy, respectively. The effect of EGCG, PIC and OXY on the conformation of β-LG was studied by Fourier transform infrared spectroscopy. In addition, the maximum synergistic antioxidant activity between EGCG and PIC/OXY was obtained by response surface analysis. The effects of β-LG in the binary and ternary systems on the antioxidant activity, stability, solubility and cytotoxicity of the polyphenols were also studied. Finally, the different cytotoxicities of the complexes and nanoparticles of the binary and ternary systems were compared. The results of this study are expected to provide a theoretical basis for the development of β-LG-based carriers co-encapsulating a variety of bioactive components.
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Affiliation(s)
- Tingting Liu
- Institute of BioPharmceutical Research, Liaocheng University, Liaocheng 252059, China.
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18
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Sawyer L. β-Lactoglobulin and Glycodelin: Two Sides of the Same Coin? Front Physiol 2021; 12:678080. [PMID: 34093238 PMCID: PMC8173191 DOI: 10.3389/fphys.2021.678080] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 04/14/2021] [Indexed: 12/22/2022] Open
Abstract
The two lipocalins, β-lactoglobulin (βLg) and glycodelin (Gd), are possibly the most closely related members of the large and widely distributed lipocalin family, yet their functions appear to be substantially different. Indeed, the function of β-lactoglobulin, a major component of ruminant milk, is still unclear although neonatal nutrition is clearly important. On the other hand, glycodelin has several specific functions in reproduction conferred through distinct, tissue specific glycosylation of the polypeptide backbone. It is also associated with some cancer outcomes. The glycodelin gene, PAEP, reflecting one of its names, progestagen-associated endometrial protein, is expressed in many though not all primates, but the name has now also been adopted for the β-lactoglobulin gene (HGNC, www.genenames.org). After a general overview of the two proteins in the context of the lipocalin family, this review considers the properties of each in the light of their physiological functional significance, supplementing earlier reviews to include studies from the past decade. While the biological function of glycodelin is reasonably well defined, that of β-lactoglobulin remains elusive.
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Affiliation(s)
- Lindsay Sawyer
- School of Biological Sciences, IQB3, The University of Edinburgh, Edinburgh, United Kingdom
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19
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Birch J, Khan S, Madsen M, Kjeldsen C, Møller MS, Stender EGP, Peters GJ, Duus JØ, Kragelund BB, Svensson B. Binding Sites for Oligosaccharide Repeats from Lactic Acid Bacteria Exopolysaccharides on Bovine β-Lactoglobulin Identified by NMR Spectroscopy. ACS OMEGA 2021; 6:9039-9052. [PMID: 33842774 PMCID: PMC8028130 DOI: 10.1021/acsomega.1c00060] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 03/11/2021] [Indexed: 05/26/2023]
Abstract
Lactic acid bacterial exopolysaccharides (EPS) are used in the food industry to improve the stability and rheological properties of fermented dairy products. β-Lactoglobulin (BLG), the dominant whey protein in bovine milk, is well known to bind small molecules such as fatty acids, vitamins, and flavors, and to interact with neutral and anionic polysaccharides used in food and pharmaceuticals. While sparse data are available on the affinity of EPS-milk protein interactions, structural information on BLG-EPS complexes, including the EPS binding sites, is completely lacking. Here, binding sites on BLG variant A (BLGA), for oligosaccharides prepared by mild acid hydrolysis of two EPS produced by Streptococcus thermophilus LY03 and Lactobacillus delbrueckii ssp. bulgaricus CNRZ 1187, respectively, are identified by NMR spectroscopy and supplemented by isothermal titration calorimetry (ITC) and molecular docking of complexes. Evidence of two binding sites (site 1 and site 2) on the surface of BLGA is achieved for both oligosaccharides (LY03-OS and 1187-OS) through NMR chemical shift perturbations, revealing multivalency of BLGA for EPS. The affinities of LY03-OS and 1187-OS for BLGA gave K D values in the mM range obtained by both NMR (pH 2.65) and ITC (pH 4.0). Molecular docking suggested that the BLGA and EPS complexes depend on hydrogen bonds and hydrophobic interactions. The findings provide insights into how BLGA engages structurally different EPS-derived oligosaccharides, which may facilitate the design of BLG-EPS complexation, of relevance for formulation of dairy products and improve understanding of BLGA coacervation.
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Affiliation(s)
- Johnny Birch
- Enzyme
and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 224, DK-2800 Kgs. Lyngby, Denmark
| | - Sanaullah Khan
- Enzyme
and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 224, DK-2800 Kgs. Lyngby, Denmark
| | - Mikkel Madsen
- Enzyme
and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 224, DK-2800 Kgs. Lyngby, Denmark
| | - Christian Kjeldsen
- NMR
Spectroscopy, Department of Chemistry, Technical
University of Denmark, Kemitorvet 207, DK-2800 Kgs. Lyngby, Denmark
| | - Marie Sofie Møller
- Enzyme
and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 224, DK-2800 Kgs. Lyngby, Denmark
| | - Emil G. P. Stender
- Enzyme
and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 224, DK-2800 Kgs. Lyngby, Denmark
| | - Günther
H. J. Peters
- Biophysical
and Biomedicinal Chemistry, Department of Chemistry, Technical University of Denmark, Kemitorvet 206, DK-2800
Kgs. Lyngby, Denmark
| | - Jens Ø. Duus
- NMR
Spectroscopy, Department of Chemistry, Technical
University of Denmark, Kemitorvet 207, DK-2800 Kgs. Lyngby, Denmark
| | - Birthe B. Kragelund
- Structural
Biology and NMR Laboratory, Department of Biology, University of Copenhagen, Ole Maaloes Vej 5, DK-2200 Copenhagen N, Denmark
| | - Birte Svensson
- Enzyme
and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 224, DK-2800 Kgs. Lyngby, Denmark
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20
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Wu G, Hui X, Gong X, Tran KN, Stipkovits L, Mohan MS, Brennan MA, Brennan CS. Functionalization of bovine whey proteins by dietary phenolics from molecular-level fabrications and mixture-level combinations. Trends Food Sci Technol 2021. [DOI: 10.1016/j.tifs.2021.01.072] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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21
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Abstract
With the increased consumer demand for nutritional foods, it is important to develop value-added products, which will not only catch the attention of a wider consumer group but also provide greater benefits in terms of enhanced nutrition and functionality. Milk whey proteins are one of the most valued constituents due to their nutritional and techno-functional attributes. Whey proteins are rich in bioactive peptides, possessing bioactive properties such as being antioxidant and antihypertensive as well as having antimicrobial activities, which, when ingested, confers several health benefits. These peptides have the potential to be used as an active food ingredient in the production of functional foods. In addition to their bioactivities, whey proteins are known to possess enhanced functional attributes that allow them to be utilized in broad applications, such as an encapsulating agent or carrier materials to entrap bioactive compounds, emulsification, and in edible and active packaging. Hence, over the recent years, several whey protein-based ingredients have been developed and utilized in making formulations for a wide range of foods to harness their beneficial properties. This review highlights the bioactive properties, functional characteristics, associated processing limitations, and applications of different whey protein fractions and derivatives in the field of food formulations, encapsulation, and packaging.
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22
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Gholami H, Divsalar A, Abbasalipourkabir R, Ziamajidi N, Saeidifar M. The simultaneous carrier ability of natural antioxidant of astaxanthin and chemotherapeutic drug of 5-fluorouracil by whey protein of β-lactoglobulin: spectroscopic and molecular docking study. J Biomol Struct Dyn 2020; 39:1004-1016. [DOI: 10.1080/07391102.2020.1733091] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Hamid Gholami
- Department of Biochemistry, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Adeleh Divsalar
- Department of Cell & Molecular Sciences, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran
| | | | - Nasrin Ziamajidi
- Department of Biochemistry, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Maryam Saeidifar
- Nanotechnology and Advanced Materials Department, Materials and Energy Research Center, Karaj, Iran
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23
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Rizzuti B, Bartucci R, Guzzi R. Effects of Polar Head Nature and Tail Length of Single-Chain Lipids on the Conformational Stability of β-Lactoglobulin. J Phys Chem B 2020; 124:944-952. [PMID: 31968169 DOI: 10.1021/acs.jpcb.9b09925] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Interaction between β-lactoglobulin and single-chain lipids, differing for either the length of the aliphatic chain or the molecular properties of the headgroup, was investigated at neutral and acidic pH to determine the impact on the thermal stability of the protein. Differential scanning calorimetry results with different fatty acids (from C10:0 to C18:0) show a correlation of both melting temperature and unfolding enthalpy of the protein with the ligand binding affinity, and the maximum effect was found for palmitic acid (PLM). The influence of the lipid polar head was investigated by comparing PLM with lyso-palmitoylphosphatidylcholine (LPC), which possesses the same aliphatic chain. At neutral pH, the stabilizing effect of LPC is less favorable compared to PLM. However, fluorescence results revealed that LPC can bind into the protein calyx even at acidic pH, at variance with fatty acids. Molecular dynamics simulations indicated that this difference is due to the ability of the polar head of LPC to interact with the protein loop that regulates the shift (Tanford transition) between open and closed state of the binding site of β-lactoglobulin. The results provide a rationale for how a ligand has the ability to access the protein active site at acidic conditions by overcoming the Tanford transition, and they demonstrate that β-lactoglobulin can deliver ligands with tailored properties of the polar head in a wide pH range.
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Affiliation(s)
- Bruno Rizzuti
- CNR-NANOTEC, Licryl-UOS Cosenza and CEMIF.Cal, Department of Physics , University of Calabria , 87036 Rende , Italy
| | - Rosa Bartucci
- Department of Chemistry and Chemical Technologies and Molecular Biophysics Laboratory , University of Calabria , 87036 Rende , Italy
| | - Rita Guzzi
- CNR-NANOTEC, Licryl-UOS Cosenza and CEMIF.Cal, Department of Physics , University of Calabria , 87036 Rende , Italy.,Department of Physics, Molecular Biophysics Laboratory , University of Calabria , 87036 Rende , Italy
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24
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Archana SS, Selvaraju S, Binsila BK, Arangasamy A, Krawetz SA. Immune regulatory molecules as modifiers of semen and fertility: A review. Mol Reprod Dev 2019; 86:1485-1504. [DOI: 10.1002/mrd.23263] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Accepted: 08/22/2019] [Indexed: 12/16/2022]
Affiliation(s)
- S. Siddalingappa Archana
- Reproductive Physiology Laboratory, Animal Physiology DivisionICAR‐National Institute of Animal Nutrition and Physiology Bengaluru India
- Department of BiochemistryJain University Bengaluru India
| | - Sellappan Selvaraju
- Reproductive Physiology Laboratory, Animal Physiology DivisionICAR‐National Institute of Animal Nutrition and Physiology Bengaluru India
| | - B. Krishnan Binsila
- Reproductive Physiology Laboratory, Animal Physiology DivisionICAR‐National Institute of Animal Nutrition and Physiology Bengaluru India
| | - Arunachalam Arangasamy
- Reproductive Physiology Laboratory, Animal Physiology DivisionICAR‐National Institute of Animal Nutrition and Physiology Bengaluru India
| | - Stephen A. Krawetz
- Department of Obstetrics and GynecologyWayne State University School of Medicine Detroit Michigan
- Center for Molecular Medicine and GeneticsC.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine Detroit Michigan
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25
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Wiedenmann V, Frister M, Oehlke K, van der Schaaf U, Karbstein HP. Properties of β-Lactoglobulin Aggregates and Gels as Affected by Ternary Emulsifier Mixtures of Tween 20, Lecithin, and Sucrose Palmitate. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:9601-9610. [PMID: 31334648 DOI: 10.1021/acs.jafc.9b02480] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The influence of sucrose palmitate, Tween 20, and lecithin on the properties of heat-induced aggregates and cold-set gels of β-lactoglobulin was studied based on an experimental mixture design with a fixed total emulsifier concentration. Emulsifiers were added to the protein solution before heating. Aggregate size and absolute values of ζ potential increased with the addition of emulsifiers, among which lecithin had the most pronounced effect. The water retention of the aggregates correlated positively with the aggregate size. Gels had reduced fracture stress and strains with increasing sucrose palmitate and decreasing Tween 20 contents. The fracture properties correlated with the ζ potentials of the aggregates, and larger aggregates led to gels with higher water-holding capacities. The emulsifiers hence influenced the gel properties indirectly via the aggregate properties. The impact of emulsifiers on food structures should therefore be considered when a food product is designed.
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Affiliation(s)
- Verena Wiedenmann
- Department of Food Technology and Bioprocess Engineering, Federal Research Institute of Nutrition and Food , Max Rubner-Institut , 76131 Karlsruhe , Germany
- Chair for Food Process Engineering, Institute of Process Engineering in Life Sciences , Karlsruhe Institute of Technology , 76131 Karlsruhe , Germany
| | - Michaela Frister
- Department of Food Technology and Bioprocess Engineering, Federal Research Institute of Nutrition and Food , Max Rubner-Institut , 76131 Karlsruhe , Germany
| | - Kathleen Oehlke
- Department of Food Technology and Bioprocess Engineering, Federal Research Institute of Nutrition and Food , Max Rubner-Institut , 76131 Karlsruhe , Germany
| | - Ulrike van der Schaaf
- Chair for Food Process Engineering, Institute of Process Engineering in Life Sciences , Karlsruhe Institute of Technology , 76131 Karlsruhe , Germany
| | - Heike Petra Karbstein
- Chair for Food Process Engineering, Institute of Process Engineering in Life Sciences , Karlsruhe Institute of Technology , 76131 Karlsruhe , Germany
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26
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Binding of aroma compounds with soy protein isolate in aqueous model: Effect of preheat treatment of soy protein isolate. Food Chem 2019; 290:16-23. [DOI: 10.1016/j.foodchem.2019.03.126] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 03/22/2019] [Accepted: 03/24/2019] [Indexed: 11/23/2022]
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27
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Saxena R, Vanga SK, Raghavan V. Effect of thermal and microwave processing on secondary structure of bovine β-lactoglobulin: A molecular modeling study. J Food Biochem 2019; 43:e12898. [PMID: 31353721 DOI: 10.1111/jfbc.12898] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 01/26/2019] [Accepted: 04/08/2019] [Indexed: 11/30/2022]
Abstract
Milk allergy is known to cause severe allergic reactions in hypersensitive patients, especially in infants and children. β-Lactoglobulin is one of the major allergens in bovine milk. The influence of thermal and microwave processing on the structural deviations of β-lactoglobulin protein have been studied using molecular modeling techniques. The structural deviations are studied using root mean square deviations, radius of gyration, dipole moment, and solvent accessible surface area. STRIDE analysis showed significant changes in the β-lactoglobulin, especially when oscillating electric fields were applied along with heat. Root mean square fluctuations (RMSF) has been assessed for known epitopes in the β-lactoglobulin molecule. This showed that when the protein is exposed to certain thermal stress, it compacts by burying hydrophobic residues in the core. However, few allergic epitope residues also exhibit increased RMSF leading to higher reactive sites on the surface of the protein molecule. PRACTICAL APPLICATIONS: This study showed that molecular modeling can be used to gain valuable insights regarding the structural changes during processing. In the future, with more computational capacity, it can be used to make comparison between results obtained from simulations and real-time experiments. The current techniques used in food industries such as Nuclear Magnetic Resonance Imaging, Fourier Transformation Infrared Spectroscopy, X-ray diffraction can analyze pre- and post-processing effects. Hence, it become necessary to understand the changes that takes place during the processing techniques. Molecular dynamic simulation could be a useful technique in analyzing the changes occurring during the processing.
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Affiliation(s)
- Rachit Saxena
- Faculty of Agricultural and Environmental Sciences, Department of Bioresource Engineering, McGill University, Montreal, Quebec, Canada
| | - Sai Kranthi Vanga
- Faculty of Agricultural and Environmental Sciences, Department of Bioresource Engineering, McGill University, Montreal, Quebec, Canada
| | - Vijaya Raghavan
- Faculty of Agricultural and Environmental Sciences, Department of Bioresource Engineering, McGill University, Montreal, Quebec, Canada
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28
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Stender EG, Birch J, Kjeldsen C, Nielsen LD, Duus JØ, Kragelund BB, Svensson B. Alginate Trisaccharide Binding Sites on the Surface of β-Lactoglobulin Identified by NMR Spectroscopy: Implications for Molecular Network Formation. ACS OMEGA 2019; 4:6165-6174. [PMID: 31459761 PMCID: PMC6647953 DOI: 10.1021/acsomega.8b03532] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 03/21/2019] [Indexed: 05/08/2023]
Abstract
β-lactoglobulin (BLG) is a promiscuous protein in terms of ligand interactions, having several binding sites reported for hydrophobic biomolecules such as fatty acids, lipids, and vitamins as well as detergents. BLG also interacts with neutral and anionic oligo- and polysaccharides for which the binding sites remain to be identified. The multivalency offered by these carbohydrate ligands is expected to facilitate coacervation, an electrostatically driven liquid-liquid phase separation. Using heteronuclear single quantum coherence NMR spectroscopy and monitoring chemical shift perturbations, we observed specific binding sites of modest affinity for alginate oligosaccharides (AOSs) prepared by alginate lyase degradation. Two different AOS binding sites (site 1 and site 2) centered around K75 and K101 were identified for monomeric BLG isoform A (BLGA) at pH 2.65. In contrast, only site 1 around K75 was observed for dimeric BLGA at pH 4.0. The data suggest a pH-dependent mechanism whereby both the BLGA dimer-monomer equilibrium and electrostatic interactions are exploited. This variability allows for control of coacervation and particle formation of BLGA/alginate mixtures via directed polysaccharide bridging of AOS binding sites and has implication for molecular network formation. The results are valuable for design of polyelectrolyte-based BLG particles and coacervates for carrying nutraceuticals and modulating viscosity in dairy products by use of alginates.
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Affiliation(s)
- Emil G.
P. Stender
- Enzyme
and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building
224, DK-2800 Kgs. Lyngby, Denmark
| | - Johnny Birch
- Enzyme
and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building
224, DK-2800 Kgs. Lyngby, Denmark
| | - Christian Kjeldsen
- Department
of Chemistry, Technical University of Denmark, Kemitorvet, Building
207, DK-2800 Kgs. Lyngby, Denmark
| | - Lau D. Nielsen
- Structural
Biology and NMR Laboratory, Linderstrøm-Lang Centre for Protein
Science, Department of Biology, University
of Copenhagen, Ole Maaløes
Vej 5, DK-2200 Copenhagen
N, Denmark
| | - Jens Ø. Duus
- Department
of Chemistry, Technical University of Denmark, Kemitorvet, Building
207, DK-2800 Kgs. Lyngby, Denmark
| | - Birthe B. Kragelund
- Structural
Biology and NMR Laboratory, Linderstrøm-Lang Centre for Protein
Science, Department of Biology, University
of Copenhagen, Ole Maaløes
Vej 5, DK-2200 Copenhagen
N, Denmark
- E-mail: . phone: +45 3532 2081 (B.S.)
| | - Birte Svensson
- Enzyme
and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building
224, DK-2800 Kgs. Lyngby, Denmark
- E-mail: . phone: +45 4525 2740 (B.B.K.)
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29
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Guo J, He Z, Wu S, Zeng M, Chen J. Binding of aromatic compounds with soy protein isolate in an aqueous model: Effect of pH. J Food Biochem 2019; 43:e12817. [PMID: 31608468 DOI: 10.1111/jfbc.12817] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 01/07/2019] [Accepted: 02/02/2019] [Indexed: 11/28/2022]
Abstract
Interactions of the flavoring compounds hexyl acetate (HxAc), heptyl acetate (HpAc), linalyl formate (LiFo), linalyl acetate (LiAc), geraniol, linalool, limonene, and myrcene with soy protein isolate (SPI) were estimated in pH 3.0, 6.0, and 9.0 aqueous solutions using headspace solid-phase microextraction gas chromatography-mass spectrometry (SPME-GC-MS). The binding capacity of HxAc, HpAc, LiFo, LiAc, geraniol, and linalool increased in the pH of the medium from 3 to 9. For limonene and myrcene, an unexpected increase in headspace concentration or a "salting-out" effect was observed. Between pH 3 and 9, better accessibility to the primary hydrophobic sites as a result of a modification to the protein's flexibility was observed. PRACTICAL APPLICATIONS: SPME method is a technology of dynamic adsorption for flavors. The lowest level of lead be practicably detected in food as low as the practiced concentration of flavors (0.01-0.1 mM) in our study. At low concentrations of flavors, it is close to the actual flavor's concentration of food. In the previous studies, the technology, such as equilibrium dialysis, headspace-gas phase which need higher concentration of flavors (>0.2 mM). The interaction between flavors and protein has a different binding law at high and low concentrations. As we produced the acid fruit soy protein milk beverage, the off-flavors present in the beverage were due to the change in the interaction between denature SPI and flavors. The present work is aimed at paving the way for further research to elucidate flavor imbalances in acid fruit soy protein milk beverage.
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Affiliation(s)
- Jun Guo
- State Key Laboratory of Food Science and Technology, JiangNan University, Wuxi, PR China.,Department of Chemistry and Material Engineering, Chizhou University, Chizhou, PR China.,International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, PR China
| | - Zhiyong He
- State Key Laboratory of Food Science and Technology, JiangNan University, Wuxi, PR China.,International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, PR China
| | - Shengfang Wu
- State Key Laboratory of Food Science and Technology, JiangNan University, Wuxi, PR China.,Department of Chemistry and Material Engineering, Chizhou University, Chizhou, PR China.,International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, PR China
| | - Maomao Zeng
- State Key Laboratory of Food Science and Technology, JiangNan University, Wuxi, PR China.,International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, PR China
| | - Jie Chen
- State Key Laboratory of Food Science and Technology, JiangNan University, Wuxi, PR China.,International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, PR China
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30
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Singh G, Singh G, Kancharla S, Kang TS. Complexation Behavior of β-Lactoglobulin with Surface Active Ionic Liquids in Aqueous Solutions: An Experimental and Computational Approach. J Phys Chem B 2019; 123:2169-2181. [DOI: 10.1021/acs.jpcb.8b11610] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Gagandeep Singh
- Department of Chemistry, UGC-Centre for Advance Studies—II, Guru Nanak Dev University, Amritsar 143005, India
| | - Gurbir Singh
- Department of Chemistry, UGC-Centre for Advance Studies—II, Guru Nanak Dev University, Amritsar 143005, India
| | - Srinivasarao Kancharla
- Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, Fukuoka 819-0395, Japan
| | - Tejwant Singh Kang
- Department of Chemistry, UGC-Centre for Advance Studies—II, Guru Nanak Dev University, Amritsar 143005, India
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Song Z, Liu J, Hou Y, Yuan W, Yang B. Study on the interaction between pyridoxal and CopC by multi-spectroscopy and docking methods. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 208:214-221. [PMID: 30321861 DOI: 10.1016/j.saa.2018.09.053] [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: 07/10/2018] [Revised: 09/17/2018] [Accepted: 09/30/2018] [Indexed: 06/08/2023]
Abstract
The interaction between pyridoxal hydrochloride (HQ) and apoCopC was investigated using Fourier transform infrared spectroscopy (FTIR), isothermal titration calorimetry (ITC), circular dichroism (CD), fluorescence spectroscopy, three-dimensional (3D) fluorescence spectroscopy, fluorescence lifetime, TNS fluorescence and docking methods. FTIR, CD, TNS fluorescence and fluorescence lifetime experiments suggested that the apoCopC conformation was altered by HQ with an increase in the random coil content and a reduction in the β-sheet content. In addition, the data from fluorescence spectroscopy, 3D fluorescence spectroscopy and molecular docking revealed that the binding site of HQ was located in the hydrophobic area of apoCopC, and a redshift of the HQ fluorescence spectra was observed. Furthermore, ITC and fluorescence quenching data manifested that the binding ratio of HQ and apoCopC was 1:1, and the forming constant was calculated to be (7.06 ± 0.21) × 105 M-1. The thermodynamic parameters ΔH and ΔS suggested that the formation of a CopC-HQ complex depended on the hydrophobic force. Furthermore, the average binding distance between tryptophan in apoCopC and HQ was determined by means of Förster non-radioactive resonance energy transfer and molecular docking. The results agreed well with each other. As a redox switch in the modulation of copper, the interaction of apoCopC with small molecules will affect the action of the redox switch. These findings could provide useful information to illustrate the copper regulation mechanism.
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Affiliation(s)
- Zhen Song
- Taiyuan Normal University Department of Chemistry, Jinzhong 030619, China
| | - Jin Liu
- Hubei Provincial Corps Hospital, Chinese People's Armed Police Forces, Wuhan 430061, China
| | - Yuxin Hou
- Taiyuan Normal University Department of Chemistry, Jinzhong 030619, China
| | - Wen Yuan
- Taiyuan Normal University Department of Chemistry, Jinzhong 030619, China
| | - Binsheng Yang
- Institute of Molecular Science, Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Shanxi University, Taiyuan 030006, China.
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Li M, Zhang W, Yang B. N‑(6‑Aminohexyl)‑5‑chloro‑1‑naphthalenesulfonamide, a centrin antagonist, inhibits Tb 3+/peptides-binding properties. J Inorg Biochem 2019; 193:15-24. [PMID: 30660047 DOI: 10.1016/j.jinorgbio.2019.01.002] [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: 08/21/2018] [Revised: 12/07/2018] [Accepted: 01/06/2019] [Indexed: 10/27/2022]
Abstract
N‑(6‑Aminohexyl)‑5‑chloro‑1‑naphthalenesulfonamide (W-7), a kind of adjuvant chemotherapy, can bind to calmodulin and inhibit Ca2+/calmodulin-regulated enzyme activities and cell proliferation. Similar to calmodulin, euplotes octocarinatus centrin (EoCen) belongs to EF-hand superfamily of calcium-binding proteins. It is associated with nucleotide excision repair (NER), cell division cycle and ciliogenesis. In the present study, the comparative interaction of W-7 with EoCen was first examined by using various spectroscopic, calorimetric methods and molecular docking. The obtain results recommend that only one W-7 molecule is identified binding to the C-terminal hydrophobic pocket of centrin that normally plays a role in anchoring targets. Methyl groups of Ala126, Met141, Ile161 and M162 of C-terminal may react with W-7 chloronaphthalene ring, other aliphatic or aromatic side-chains in a deep hydrophobic pocket of protein. Circular dichroism (CD) and fluorescence lifetime experiments reveal that W-7 triggers a conformational change of centrin. As a result, W-7 is identified to be an antagonist of centrin. It appears to inhibit the centrin-mediated activation of target proteins by blocking the hydrophobic pocket. Moreover, the complex formation leads to affinity decrease of Tb3+ binding to C-terminal of protein and self-assembly affected. Our present study provides the first view of centrin recognizing a naphthalene-sulfonamide derivative. It is proposed that W-7 and its analogues can serve as a useful tool for research on the participation of centrin in biological processes and cell biology-related studies.
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Affiliation(s)
- Min Li
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Molecular Science, Taiyuan 030006, China; Department of Chemistry, Changzhi University, Changzhi 046011, China
| | - Wenlong Zhang
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Molecular Science, Taiyuan 030006, China
| | - Binsheng Yang
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Molecular Science, Taiyuan 030006, China.
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Kurpiewska K, Biela A, Loch JI, Lipowska J, Siuda M, Lewiński K. Towards understanding the effect of high pressure on food protein allergenicity: β-lactoglobulin structural studies. Food Chem 2019; 270:315-321. [DOI: 10.1016/j.foodchem.2018.07.104] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 07/15/2018] [Accepted: 07/17/2018] [Indexed: 11/29/2022]
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Antenna effect and phosphorescence spectra to find the location of drug tetracycline in bovine β-lactoglobulin A. J Biol Inorg Chem 2018; 23:917-927. [DOI: 10.1007/s00775-018-1591-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 07/02/2018] [Indexed: 12/22/2022]
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Khan S, Ipsen R, Almdal K, Svensson B, Harris P. Revealing the Dimeric Crystal and Solution Structure of β-Lactoglobulin at pH 4 and Its pH and Salt Dependent Monomer–Dimer Equilibrium. Biomacromolecules 2018; 19:2905-2912. [DOI: 10.1021/acs.biomac.8b00471] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sanaullah Khan
- Enzyme and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 224, DK-2800 Kgs. Lyngby, Denmark
- Department of Micro- and Nanotechnology, Technical University of Denmark, Ørsteds Plads, Building 423, DK-2800 Kgs. Lyngby, Denmark
| | - Richard Ipsen
- Department of Food Science, University of Copenhagen, Rolighedsvej 26, DK-1958 Frederiksberg, Denmark
| | - Kristoffer Almdal
- Department of Micro- and Nanotechnology, Technical University of Denmark, Ørsteds Plads, Building 423, DK-2800 Kgs. Lyngby, Denmark
| | - Birte Svensson
- Enzyme and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 224, DK-2800 Kgs. Lyngby, Denmark
| | - Pernille Harris
- Department of Chemistry, Technical University of Denmark, Kemitorvet, Building 207, DK-2800 Kgs. Lyngby, Denmark
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Sheng B, Li L, Zhang X, Jiao W, Zhao D, Wang X, Wan L, Li B, Rong H. Physicochemical Properties and Chemical Stability of β-Carotene Bilayer Emulsion Coated with Bovine Serum Albumin and Arabic Gum Compared to Monolayer Emulsions. Molecules 2018; 23:E495. [PMID: 29473885 PMCID: PMC6017972 DOI: 10.3390/molecules23020495] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 02/20/2018] [Accepted: 02/20/2018] [Indexed: 11/23/2022] Open
Abstract
β-carotene is a lipophilic micronutrient that is considered beneficial to human health. However, there are some limitations in utilizing β-carotene in functional foods or dietary supplements currently because of its poor water dispersibility and chemical stability. A new type of β-carotene bilayer emulsion delivery system was prepared by a layer-by-layer electrostatic deposition technique, for which were chosen bovine serum albumin (BSA) as the inner emulsifier and Arabic gum (GA) as the outer emulsifier. The physicochemical properties of bilayer emulsions were mainly characterized by droplet size distribution, zeta potential, rheological behavior, Creaming Index (CI), and encapsulation ratio of β-carotene. Besides this, the effects of processing conditions (pH, thermal treatment, UV radiation, strong oxidant) and storage time on the chemical stability of bilayer emulsions were also evaluated. The bilayer emulsion had a small droplet size (221.27 ± 5.17 nm) and distribution (PDI = 0.23 ± 0.02), strong zeta potential (-30.37 ± 0.71 mV), good rheological behavior (with the highest viscosity that could reduce the possibility of flocculation) and physical stability (CI = 0), high β-carotene encapsulation ratio (94.35 ± 0.71%), and low interfacial tension (40.81 ± 0.86 mN/m). It also obtained better chemical stability under different environmental stresses when compared with monolayer emulsions studied, because it had a dense and thick bilayer structure.
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Affiliation(s)
- Bulei Sheng
- College of Food Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China.
| | - Lin Li
- College of Food Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China.
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, 381 Wushan Road, Guangzhou 510640, China.
- School of Chemical Engineering and Energy Technology, Dongguan University of Technology, College Road 1, Dongguan 523808, China.
| | - Xia Zhang
- College of Food Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China.
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, 381 Wushan Road, Guangzhou 510640, China.
| | - Wenjuan Jiao
- College of Food Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China.
| | - Di Zhao
- College of Food Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China.
| | - Xue Wang
- College of Food Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China.
| | - Liting Wan
- College of Food Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China.
| | - Bing Li
- College of Food Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China.
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, 381 Wushan Road, Guangzhou 510640, China.
| | - Hui Rong
- Guangzhou Entry-Exit Inspection & Quarantine Bureau of China, Guangzhou 510623, China.
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Kurpiewska K, Biela A, Loch J, Świątek S, Jachimska B, Lewiński K. Investigation of high pressure effect on the structure and adsorption of β-lactoglobulin. Colloids Surf B Biointerfaces 2018; 161:387-393. [DOI: 10.1016/j.colsurfb.2017.10.069] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 10/03/2017] [Accepted: 10/30/2017] [Indexed: 11/17/2022]
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38
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Banerjee R, Purkayastha P. Piecemeal Rekindling of Coumarin 6 Fluorescence on Stepwise Unfolding of Protein by Surfactant. J Phys Chem B 2017; 121:11449-11454. [PMID: 29199425 DOI: 10.1021/acs.jpcb.7b10310] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Coumarin 6 (C6) briskly aggregates in water, and as a result, rapidly loses fluorescence. However, vicinal hydrophobic cavity can induce disintegration of the aggregates, and thus reviving the fluorescence. It is shown that carrier protein, such as bovine serum albumin (BSA), can disintegrate the microcrystals of C6 to smaller fragments and trap them inside the hydrophobic domain of the folded protein. This results into a 12-fold enhancement in the fluorescence signal of C6. However, on unfolding BSA by micelles, the C6 microcrystals break into single molecules by getting trapped in the micelles, and hence emission enhances by more than 100-folds.
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Affiliation(s)
- Rajashree Banerjee
- Department of Chemical Sciences and Center for Advanced Functional Materials, Indian Institute of Science Education and Research (IISER) Kolkata , Mohanpur 741246, WB, India
| | - Pradipta Purkayastha
- Department of Chemical Sciences and Center for Advanced Functional Materials, Indian Institute of Science Education and Research (IISER) Kolkata , Mohanpur 741246, WB, India
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39
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Yildirim-Elikoglu S, Erdem YK. Interactions between milk proteins and polyphenols: Binding mechanisms, related changes, and the future trends in the dairy industry. FOOD REVIEWS INTERNATIONAL 2017. [DOI: 10.1080/87559129.2017.1377225] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Seda Yildirim-Elikoglu
- Department of Food Engineering, Faculty of Engineering, Hacettepe University, Ankara, Turkey
| | - Yasar Kemal Erdem
- Department of Food Engineering, Faculty of Engineering, Hacettepe University, Ankara, Turkey
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40
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Lou X, Yang Q, Sun Y, Pan D, Cao J. The effect of microwave on the interaction of flavour compounds with G-actin from grass carp (Catenopharyngodon idella). JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2017; 97:3917-3922. [PMID: 28345129 DOI: 10.1002/jsfa.8325] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Revised: 02/22/2017] [Accepted: 03/21/2017] [Indexed: 06/06/2023]
Abstract
BACKGROUND In order to investigate the influence of non-thermal effects of microwaves on the flavour of fish and meat products, the G-actin of grass carp in ice baths was exposed to different microwave powers (0, 100, 300 or 500 W); the surface hydrophobicity, sulfhydryl contents, secondary structures and adsorption capacity of G-actin to ketones were determined. RESULTS As microwave power increased from 0 to 300 W, the surface hydrophobicity, total and reactive sulfhydryls increased; α-helix, β-sheet and random coil fractions turned into β-turn fractions. As microwave power increased from 300 to 500 W, however, hydrophobicity and sulfhydryl contents decreased; β-turn and random coil fractions turned into α-helix and β-sheet fractions. The tendencies of adsorbed capacity of ketones were similar to hydrophobicity and sulfhydryl contents. CONCLUSION The increased adsorbing of ketones could be attributed to the unfolding of secondary structures by revealing new binding sites, including thiol groups and hydrophobic binding sites. The decreased binding capacity was related to the refolding and aggregation of protein. The results suggested that microwave powers had obvious effects on the flavour retention and proteins structures in muscle foods. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Xiaowei Lou
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo, China
| | - Qiuli Yang
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo, China
| | - Yangying Sun
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo, China
| | - Daodong Pan
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo, China
| | - Jinxuan Cao
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo, China
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41
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Mao L, Roos YH, Biliaderis CG, Miao S. Food emulsions as delivery systems for flavor compounds: A review. Crit Rev Food Sci Nutr 2017; 57:3173-3187. [DOI: 10.1080/10408398.2015.1098586] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Like Mao
- Teagasc Food Research Centre, Moorepark, Fermoy, County Cork, Ireland
- School of Food and Nutritional Sciences, University College Cork, County Cork, Ireland
| | - Yrjö H. Roos
- School of Food and Nutritional Sciences, University College Cork, County Cork, Ireland
| | - Costas G. Biliaderis
- Department of Food Science, Faculty of Agriculture, Forestry and Natural Environment, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Song Miao
- Teagasc Food Research Centre, Moorepark, Fermoy, County Cork, Ireland
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42
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Tenney K, Hayes J, Euston S, Elias R, Coupland J. Binding of Caffeine and Quinine by Whey Protein and the Effect on Bitterness. J Food Sci 2017; 82:509-516. [DOI: 10.1111/1750-3841.13588] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 11/06/2016] [Accepted: 11/29/2016] [Indexed: 12/25/2022]
Affiliation(s)
- Kelsey Tenney
- Dept. of Food Science, The Pennsylvania State Univ., and Inst. of Mechanical, Process and Energy Engineering; Heriot-Watt Univ.; Edinburgh U.K
| | - John Hayes
- Dept. of Food Science, The Pennsylvania State Univ., and Inst. of Mechanical, Process and Energy Engineering; Heriot-Watt Univ.; Edinburgh U.K
| | - Stephen Euston
- Dept. of Food Science, The Pennsylvania State Univ., and Inst. of Mechanical, Process and Energy Engineering; Heriot-Watt Univ.; Edinburgh U.K
| | - Ryan Elias
- Dept. of Food Science, The Pennsylvania State Univ., and Inst. of Mechanical, Process and Energy Engineering; Heriot-Watt Univ.; Edinburgh U.K
| | - John Coupland
- Dept. of Food Science, The Pennsylvania State Univ., and Inst. of Mechanical, Process and Energy Engineering; Heriot-Watt Univ.; Edinburgh U.K
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43
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Song Z, Yuan W, Zhu R, Wang S, Zhang C, Yang B. Study on the interaction between curcumin and CopC by spectroscopic and docking methods. Int J Biol Macromol 2016; 96:192-199. [PMID: 27902937 DOI: 10.1016/j.ijbiomac.2016.11.099] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 11/22/2016] [Accepted: 11/23/2016] [Indexed: 11/16/2022]
Abstract
Curcumin is a widely studied polyphenolic compound which has a variety of biological activity as anti-inflammatory and antitumor drugs. Recent research reported that copper chaperone binding with small molecular may relate to the treatment of cancer. In this work, the interaction between curcumin and CopC has been investigated in detail by means of UV-vis absorption, FTIR, CD, fluorescence spectroscopic and molecular docking methods The results showed that the CopC conformation was altered by curcumin with reduction of β-sheet and increase of random coil. Furthermore, curcumin can form a host-guest inclusion supramolecular complex with curcumin, and the forming constant had been calculated to be (2.85±0.21)×105M-1. In addition, the binding ability between Cu2+ and curcumin was less than that between Cu2+ and CopC. Moreover, the binding of curcumin with Cu2+ has an effect on the binding ability between curcumin and CopC. The thermodynamic parameters ΔH and ΔS at different temperatures were obtained. The formation of CopC-curcumin complex depended on the hydrophobic force, and the binding average distance between CopC and curcumin was determined. What's more, the binding site of curcumin to CopC was shown vividly by an automated public domain software package ArgusLab 4.0.1.
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Affiliation(s)
- Zhen Song
- Taiyuan Normal University Department of Chemistry, Taiyuan, 030012, China
| | - Wen Yuan
- Taiyuan Normal University Department of Chemistry, Taiyuan, 030012, China
| | - Ruitao Zhu
- Taiyuan Normal University Department of Chemistry, Taiyuan, 030012, China
| | - Song Wang
- Taiyuan Normal University Department of Chemistry, Taiyuan, 030012, China
| | - Caifeng Zhang
- Taiyuan Normal University Department of Chemistry, Taiyuan, 030012, China; Humic Acid Engineering and Technology Research Center of Shanxi Province, Taiyuan, 030012, China
| | - Binsheng Yang
- Institute of Molecular Science, Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Shanxi University, Taiyuan, 030006, China.
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44
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Spectroscopic and dynamic properties of arachidonoyl serotonin- β-lactoglobulin complex: A molecular modeling and chemometric study. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 162:519-528. [DOI: 10.1016/j.jphotobiol.2016.07.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 07/08/2016] [Indexed: 11/22/2022]
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45
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Rastegari B, Karbalaei-Heidari HR, Yousefi R, Zeinali S, Nabavizadeh M. Interaction of prodigiosin with HSA and β-Lg: Spectroscopic and molecular docking studies. Bioorg Med Chem 2016; 24:1504-12. [DOI: 10.1016/j.bmc.2016.02.020] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2015] [Revised: 02/05/2016] [Accepted: 02/12/2016] [Indexed: 10/22/2022]
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46
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Izadi Z, Divsalar A, Saboury AA, Sawyer L. β-lactoglobulin-pectin Nanoparticle-based Oral Drug Delivery System for Potential Treatment of Colon Cancer. Chem Biol Drug Des 2016; 88:209-16. [DOI: 10.1111/cbdd.12748] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 02/03/2016] [Accepted: 02/10/2016] [Indexed: 12/17/2022]
Affiliation(s)
- Zhila Izadi
- Department of Cell & Molecular Biology; Faculty of Biological Sciences; Kharazmi University; P.O. Box 15815/3587 Tehran Iran
| | - Adeleh Divsalar
- Department of Cell & Molecular Biology; Faculty of Biological Sciences; Kharazmi University; P.O. Box 15815/3587 Tehran Iran
| | - Ali Akbar Saboury
- Institute of Biochemistry and Biophysics; University of Tehran; P.O.Box 13145-1384 Tehran Iran
| | - Lindsay Sawyer
- School of Biological Sciences; The University of Edinburgh; Roger Land Building, Alexander Crum Brown Road; Edinburgh EH9 3FF UK
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47
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Bello M. Structural and energetic requirements for a second binding site at the dimeric β-lactoglobulin interface. J Biomol Struct Dyn 2016; 34:1884-902. [DOI: 10.1080/07391102.2015.1094413] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Martiniano Bello
- Laboratorio de Modelado Molecular, Bioinformática y Diseño de Fármacos de la Escuela Superior de Medicina, Instituto Politécnico Nacional, Plan de San Luis Y Diaz Mirón S/N, Col. Casco de Santo Tomas, CP 11340 México, D. F., Mexico
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48
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Gholami S, Bordbar A, Akvan N, Parastar H, Fani N, Gretskaya N, Bezuglov V, Haertlé T. Binding assessment of two arachidonic-based synthetic derivatives of adrenalin with β-lactoglobulin: Molecular modeling and chemometrics approach. Biophys Chem 2015; 207:97-106. [DOI: 10.1016/j.bpc.2015.10.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2014] [Revised: 10/06/2015] [Accepted: 10/07/2015] [Indexed: 11/30/2022]
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49
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Sahihi M. In-Silico Study on the Interaction of Saffron Ligands and Beta-Lactoglobulin by Molecular Dynamics and Molecular Docking Approach. J MACROMOL SCI B 2015. [DOI: 10.1080/00222348.2015.1125066] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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50
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Zinc-induced oligomerization of zinc α2 glycoprotein reveals multiple fatty acid-binding sites. Biochem J 2015; 473:43-54. [PMID: 26487699 DOI: 10.1042/bj20150836] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 10/20/2015] [Indexed: 02/07/2023]
Abstract
Zinc α2 glycoprotein (ZAG) is an adipokine with a class I MHC protein fold and is associated with obesity and diabetes. Although its intrinsic ligand remains unknown, ZAG binds the dansylated C11 fatty acid 11-(dansylamino)undecanoic acid (DAUDA) in the groove between the α1 and α2 domains. The surface of ZAG has approximately 15 weak zinc-binding sites deemed responsible for precipitation from human plasma. In the present study the functional significance of these metal sites was investigated. Analytical ultracentrifugation (AUC) and CD showed that zinc, but not other divalent metals, causes ZAG to oligomerize in solution. Thus ZAG dimers and trimers were observed in the presence of 1 and 2 mM zinc. Molecular modelling of X-ray scattering curves and sedimentation coefficients indicated a progressive stacking of ZAG monomers, suggesting that the ZAG groove may be occluded in these. Using fluorescence-detected sedimentation velocity, these ZAG-zinc oligomers were again observed in the presence of the fluorescent boron dipyrromethene fatty acid C16-BODIPY (4,4-difluoro-5,7-dimethyl-4-bora-3a,4a-diaza-s-indacene-3-hexadecanoic acid). Fluorescence spectroscopy confirmed that ZAG binds C16-BODIPY. ZAG binding to C16-BODIPY, but not to DAUDA, was reduced by increased zinc concentrations. We conclude that the lipid-binding groove in ZAG contains at least two distinct fatty acid-binding sites for DAUDA and C16-BODIPY, similar to the multiple lipid binding seen in the structurally related immune protein CD1c. In addition, because high concentrations of zinc occur in the pancreas, the perturbation of these multiple lipid-binding sites by zinc may be significant in Type 2 diabetes where dysregulation of ZAG and zinc homoeostasis occurs.
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