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Hu J, Hu X, Zeng Z, Zhang J, Li M, Geng F, Wu D. Interaction between a photoisomerizable azobenzene compound and alpha-lactalbumin: Spectroscopic and computational simulation studies. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 301:122965. [PMID: 37327501 DOI: 10.1016/j.saa.2023.122965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 05/29/2023] [Accepted: 05/30/2023] [Indexed: 06/18/2023]
Abstract
The combination of light and photoresponsive compounds provides a peculiar way of regulating biological systems. Azobenzene is a classical organic compound with photoisomerization properties. Exploring the interactions between azobenzene and proteins can deepen the biochemical applications of the azobenzene compounds. In this paper, the interaction of 4-[(2,6-dimethylphenyl)diazenyl]-3,5-dimethylphenol with alpha-lactalbumin was investigated by UV-Vis absorption spectra, multiple fluorescence spectra, computer simulations, and circular dichroism spectra. Most critically, the interaction differences between proteins and the trans- and cis-isomer of ligands have been analyzed and compared. Results showed that both isomers of ligands were bound to alpha-lactalbumin to form ground state complexes and statically quenched the steady-state fluorescence of alpha-lactalbumin. The van der Waals forces and hydrogen bonding dominated the binding; the difference is that the binding of the cis-isomer to alpha-lactalbumin is more rapidly stabilized, and the binding strength is greater than the trans-isomer. These binding differences were modeled and analyzed by molecular docking and kinetic simulations, and we found that both isomers bind through the hydrophobic aromatic cluster 2 of alpha-lactalbumin. However, the bent structure of the cis-isomer is more closely aligned with the construction of the aromatic cluster and may have contributed to the above differences.
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Affiliation(s)
- Jie Hu
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
| | - Xia Hu
- Meat Processing Key Laboratory of Sichuan Province, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Zhen Zeng
- Meat Processing Key Laboratory of Sichuan Province, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Jing Zhang
- Meat Processing Key Laboratory of Sichuan Province, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Mohan Li
- Meat Processing Key Laboratory of Sichuan Province, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Fang Geng
- Meat Processing Key Laboratory of Sichuan Province, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Di Wu
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, China; Meat Processing Key Laboratory of Sichuan Province, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China.
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Wang X, Yao C, Yao X, Lin J, Li R, Huang K, Lin W, Long X, Dai C, Dong J, Yu X, Huang W, Weng W, Wang Q, Ouyang H, Cheng K. Dynamic photoelectrical regulation of ECM protein and cellular behaviors. Bioact Mater 2023; 22:168-179. [PMID: 36203959 PMCID: PMC9529514 DOI: 10.1016/j.bioactmat.2022.09.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 09/07/2022] [Accepted: 09/21/2022] [Indexed: 12/02/2022] Open
Abstract
Dynamic regulation of cell-extracellular matrix (ECM)-material interactions is crucial for various biomedical applications. In this study, a light-activated molecular switch for the modulation of cell attachment/detachment behaviors was established on monolayer graphene (Gr)/n-type Silicon substrates (Gr/Si). Initiated by light illumination at the Gr/Si interface, pre-adsorbed proteins (bovine serum albumin, ECM proteins collagen-1, and fibronectin) underwent protonation to achieve negative charge transfer to Gr films (n-doping) through π-π interactions. This n-doping process stimulated the conformational switches of ECM proteins. The structural alterations in these ECM interactors significantly reduced the specificity of the cell surface receptor-ligand interaction (e.g., integrin recognition), leading to dynamic regulation of cell adhesion and eventual cell detachment. RNA-sequencing results revealed that the detached bone marrow mesenchymal stromal cell sheets from the Gr/Si system manifested regulated immunoregulatory properties and enhanced osteogenic differentiation, implying their potential application in bone tissue regeneration. This work not only provides a fast and feasible method for controllable cells/cell sheets harvesting but also gives new insights into the understanding of cell-ECM-material communications. A light-activated molecular switch for regulation of cell attachment/detachment behaviors was established on (Gr/Si) substrates. Light-induced charge transfer from ECM protein to Gr/Si through π-π interactions, resulting in the conformational alteration of ECM proteins. Structural changes in ECM weakened the binding between RGD and integrin, inducing cell detachment. This work provides a feasible method for cell harvesting and improves the understanding of cell-ECM-material communications.
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Affiliation(s)
- Xiaozhao Wang
- Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cells and Regenerative Medicine, Department of Orthopedic Surgery of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
- Department of Sports Medicine, Zhejiang University School of Medicine, Hangzhou, 310058, China
- Zhejiang University-University of Edinburgh Institute, Zhejiang University School of Medicine, Key Laboratory of Tissue Engineering and Regenerative Medicine of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, 314400, China
- China Orthopedic Regenerative Medicine Group (CORMed), Hangzhou, 310058, China
| | - Cai Yao
- School of Chemistry, Zhejiang University, Hangzhou, 310027, China
| | - Xudong Yao
- International Institutes of Medicine, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, No. N1, Shangcheng Avenue, Yiwu, 322000, China
| | - Junxin Lin
- Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cells and Regenerative Medicine, Department of Orthopedic Surgery of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
- Department of Sports Medicine, Zhejiang University School of Medicine, Hangzhou, 310058, China
- Zhejiang University-University of Edinburgh Institute, Zhejiang University School of Medicine, Key Laboratory of Tissue Engineering and Regenerative Medicine of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, 314400, China
- China Orthopedic Regenerative Medicine Group (CORMed), Hangzhou, 310058, China
| | - Rui Li
- Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cells and Regenerative Medicine, Department of Orthopedic Surgery of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
- Department of Sports Medicine, Zhejiang University School of Medicine, Hangzhou, 310058, China
- Zhejiang University-University of Edinburgh Institute, Zhejiang University School of Medicine, Key Laboratory of Tissue Engineering and Regenerative Medicine of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, 314400, China
- China Orthopedic Regenerative Medicine Group (CORMed), Hangzhou, 310058, China
| | - Kun Huang
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou, 310027, China
| | - Weiming Lin
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou, 310027, China
| | - Xiaojun Long
- Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cells and Regenerative Medicine, Department of Orthopedic Surgery of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
- Department of Sports Medicine, Zhejiang University School of Medicine, Hangzhou, 310058, China
- Zhejiang University-University of Edinburgh Institute, Zhejiang University School of Medicine, Key Laboratory of Tissue Engineering and Regenerative Medicine of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, 314400, China
- China Orthopedic Regenerative Medicine Group (CORMed), Hangzhou, 310058, China
| | - Chao Dai
- Zhejiang University-University of Edinburgh Institute, Zhejiang University School of Medicine, Key Laboratory of Tissue Engineering and Regenerative Medicine of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, 314400, China
| | - Jiajun Dong
- Zhejiang University-University of Edinburgh Institute, Zhejiang University School of Medicine, Key Laboratory of Tissue Engineering and Regenerative Medicine of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, 314400, China
| | - Xuegong Yu
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou, 310027, China
| | - Wenwen Huang
- Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cells and Regenerative Medicine, Department of Orthopedic Surgery of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
- Department of Sports Medicine, Zhejiang University School of Medicine, Hangzhou, 310058, China
- Zhejiang University-University of Edinburgh Institute, Zhejiang University School of Medicine, Key Laboratory of Tissue Engineering and Regenerative Medicine of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, 314400, China
- China Orthopedic Regenerative Medicine Group (CORMed), Hangzhou, 310058, China
| | - Wenjian Weng
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou, 310027, China
| | - Qi Wang
- School of Chemistry, Zhejiang University, Hangzhou, 310027, China
| | - Hongwei Ouyang
- Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cells and Regenerative Medicine, Department of Orthopedic Surgery of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
- Department of Sports Medicine, Zhejiang University School of Medicine, Hangzhou, 310058, China
- Zhejiang University-University of Edinburgh Institute, Zhejiang University School of Medicine, Key Laboratory of Tissue Engineering and Regenerative Medicine of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, 314400, China
- China Orthopedic Regenerative Medicine Group (CORMed), Hangzhou, 310058, China
- Corresponding author. Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cells and Regenerative Medicine, Department of Orthopedic Surgery of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China.
| | - Kui Cheng
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou, 310027, China
- Corresponding author.
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Hu X, Wu D, Tang L, Zhang J, Zeng Z, Geng F, Li H. Binding mechanism and antioxidant activity of piperine to hemoglobin. Food Chem 2022; 394:133558. [PMID: 35753257 DOI: 10.1016/j.foodchem.2022.133558] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 06/17/2022] [Accepted: 06/20/2022] [Indexed: 11/19/2022]
Abstract
Piperine (PIP) is the most active main component in pepper. The interaction of small molecules with biomolecules leads to structural and functional changes. In this study, the binding mechanism and antioxidant activity of PIP with hemoglobin (Hb) are presented using spectroscopic and computational methods. Results showed that the redox activity of PIP on Hb showed concentration dependence. Fluorescence and isothermal titration calorimetric experiments showed that the Hb-PIP system had a static quenching mechanism at a single binding site. The addition of PIP caused a slight perturbation to the secondary structure of Hb by structural analysis. The structural stability of the Hb-PIP binding system was demonstrated by molecular dynamics simulations, and molecular docking and thermodynamic constants confirmed that the electrostatic interaction force was dominant in the energy contribution of the system. Research results are conducive to the potential use of PIP in related meat products.
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Affiliation(s)
- Xia Hu
- Meat Processing Key Laboratory of Sichuan Province, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Di Wu
- Meat Processing Key Laboratory of Sichuan Province, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China.
| | - Lan Tang
- Meat Processing Key Laboratory of Sichuan Province, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Jing Zhang
- Meat Processing Key Laboratory of Sichuan Province, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Zhen Zeng
- Meat Processing Key Laboratory of Sichuan Province, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Fang Geng
- Meat Processing Key Laboratory of Sichuan Province, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Hui Li
- School of Chemical Engineering, Sichuan University, Chengdu 610065, China
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Li G, Xu M, Zhang S, Yang G, Li W. Reversible Controlling the Supramolecular Chirality of Side Chain Azobenzene Polymers: chiral Induction and Modulation. Macromol Rapid Commun 2022; 43:e2100904. [PMID: 35133021 DOI: 10.1002/marc.202100904] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 01/23/2022] [Indexed: 11/09/2022]
Abstract
Chirality represents a fundamental structure in nature, the induction and reversible modulation of supramolecular chirality with feasible techniques is of great value in the design of new chiroptical smart materials. Herein, two kinds of azobenzene side-chain polymers (without spacer: Azo-PMA0; with 6 spacers: Azo-PMA6) were synthesized, the length of spacer and azobenzene chromophores play a vital role in chirality transfer and modulation. The supramolecular chiral arrangement of Azo-PMA0 (amorphous phase) can be completely controlled and reversibly modulated over multiple cycles by 450 nm circularly polarized light (CPL) driven by the supramolecular interaction between azo groups of polymer chains, with an absorption dissymmetry factor (g) value of 0.0019. The chiroptical properties of Azo-PMA6 (liquid crystal state) can also be reversibly modulated by UV light and thermal annealing treatment during trans-cis isomerization of azo chromophore, with the g-value changes from 0-0.038. The successful construction of reversible chiral induction and modulation based on side chain azobenzene polymers may pave the way for designing photo-switchable functional materials. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Guangyao Li
- Department of Chemistry and Chemical engineering, College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Hexing Road 26, Harbin, 150040, P. R. China
| | - Mingcong Xu
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Hexing Road 26, Harbin, 150040, P. R. China
| | - Siyu Zhang
- Department of Chemistry and Chemical engineering, College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Hexing Road 26, Harbin, 150040, P. R. China
| | - Guang Yang
- Department of Chemistry and Chemical engineering, College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Hexing Road 26, Harbin, 150040, P. R. China
| | - Wei Li
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Hexing Road 26, Harbin, 150040, P. R. China
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Wu D, Tang L, Duan R, Hu X, Geng F, Zhang Y, Peng L, Li H. Interaction mechanisms and structure-affinity relationships between hyperoside and soybean β-conglycinin and glycinin. Food Chem 2021; 347:129052. [PMID: 33482484 DOI: 10.1016/j.foodchem.2021.129052] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 11/05/2020] [Accepted: 01/05/2021] [Indexed: 12/31/2022]
Abstract
Hyperoside (HYP) is an important natural product that is widely distributed in fruits and whole grasses of various plants. It is also used by consumers as a healthy ingredient. This work explored the interaction mechanisms between HYP and two main soy proteins, namely, β-conglycinin (7S) and glycinin (11S), using computational simulation and multi-spectroscopic technology. In this study, the docking and dynamic simulation showed that HYP was stable in the hydrophobic pockets of the proteins. The conformation and microenvironment of 7S/11S also changed after binding to HYP. The binding of HYP to 7S/11S was a state quenching with a good affinity at 4 °C. This result was determined from the binding constant values of (1.995 ± 0.170) × 107 M-1 and (2.951 ± 0.109) × 107 M-1, respectively. The 7S/11S-HYP complex delineated here will provide a novel idea to construct an embedding and delivery system in improving the benefits of HYP for the development of high value-added food products.
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Affiliation(s)
- Di Wu
- Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture and Rural Affairs, Chengdu University, Chengdu 610106, China.
| | - Lan Tang
- Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture and Rural Affairs, Chengdu University, Chengdu 610106, China
| | - Ran Duan
- Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture and Rural Affairs, Chengdu University, Chengdu 610106, China
| | - Xia Hu
- Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture and Rural Affairs, Chengdu University, Chengdu 610106, China
| | - Fang Geng
- Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture and Rural Affairs, Chengdu University, Chengdu 610106, China
| | - Yin Zhang
- Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture and Rural Affairs, Chengdu University, Chengdu 610106, China
| | - Lianxin Peng
- Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture and Rural Affairs, Chengdu University, Chengdu 610106, China
| | - Hui Li
- School of Chemical Engineering, Sichuan University, Chengdu 610065, China
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Wu D, Duan R, Tang L, Hu X, Geng F, Sun Q, Zhang Y, Li H. Binding mechanism and functional evaluation of quercetin 3-rhamnoside on lipase. Food Chem 2021; 359:129960. [PMID: 33945987 DOI: 10.1016/j.foodchem.2021.129960] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 04/18/2021] [Accepted: 04/25/2021] [Indexed: 12/19/2022]
Abstract
The interaction between lipase and quercetin 3-rhamnoside was studied by fluorescence spectroscopy, enzyme kinetics, and molecular dynamics simulation. The results showed that quercetin 3-rhamnoside had a strong quenching effect on the intrinsic fluorescence of lipase. The binding constant decreased with increasing temperature, and the number of binding sites approached 1. Thermodynamic parameters indicated that hydrogen bonding and van der Waals forces are the dominant forces when the interaction occurs. Circular dichroism spectroscopy and infrared spectroscopy proved that the ligand perturbed the structure of lipase. Enzyme kinetics results showed that quercetin 3-rhamnoside inhibited lipase, and the inhibitory effect was dose-dependent. Molecular dynamics simulation further explained the interaction mechanism and inhibitory effect. This study confirmed the inhibitory effect of quercetin 3-rhamnoside on lipase explained their binding mechanism, which will contribute to guiding the development of fat-reducing functional foods.
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Affiliation(s)
- Di Wu
- Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture and Rural Affairs, Chengdu University, Chengdu 610106, China.
| | - Ran Duan
- Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture and Rural Affairs, Chengdu University, Chengdu 610106, China
| | - Lan Tang
- Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture and Rural Affairs, Chengdu University, Chengdu 610106, China
| | - Xia Hu
- Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture and Rural Affairs, Chengdu University, Chengdu 610106, China
| | - Fang Geng
- Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture and Rural Affairs, Chengdu University, Chengdu 610106, China
| | - Qiaomei Sun
- College of Chemical Engineering, Sichuan University, Chengdu 610010, China
| | - Yin Zhang
- Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture and Rural Affairs, Chengdu University, Chengdu 610106, China
| | - Hui Li
- College of Chemical Engineering, Sichuan University, Chengdu 610010, China
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