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Li C, Zhu Q, Chang H, Jiang M, Mao S, Chen Z, Kong L, Liu H, Tian H, Wang J. A sensitive biosensor of CdS QDs sensitized CdWO4-TiO2 composite for the photoelectrochemical immunoassay of β-lactoglobulin in the milk. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2021.115964] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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2
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Ansari SS, Yousuf I, Arjmand F, Siddiqi MK, Naqvi S. Exploring the intermolecular interactions and contrasting binding of flufenamic acid with hemoglobin and lysozyme: A biophysical and docking insight. Int J Biol Macromol 2018; 116:1105-1118. [DOI: 10.1016/j.ijbiomac.2018.05.052] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Revised: 04/22/2018] [Accepted: 05/10/2018] [Indexed: 12/13/2022]
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3
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Li X, Zhang XL, Cai YM, Zhang L, Lin Y, Meng Q. Site specific labeling of two proteins in one system by atypical split inteins. Int J Biol Macromol 2018; 109:921-931. [DOI: 10.1016/j.ijbiomac.2017.11.077] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 11/06/2017] [Accepted: 11/12/2017] [Indexed: 01/25/2023]
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4
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Qian Y, Xu X, Wang Q, Wu P, Zhang H, Cai C. Electrochemical probing of the solution pH-induced structural alterations around the heme group in myoglobin. Phys Chem Chem Phys 2013; 15:16941-8. [DOI: 10.1039/c3cp52352g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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5
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Xu M, Yang L, Wang Q. A Way to Probe the Microenvironment of Free Sulfhydryls in Intact Proteins with a Series of Monofunctional Organic Mercurials. Chemistry 2012; 18:13989-93. [DOI: 10.1002/chem.201200901] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2012] [Revised: 08/08/2012] [Indexed: 11/10/2022]
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6
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Le Maux S, Giblin L, Croguennec T, Bouhallab S, Brodkorb A. β-Lactoglobulin as a molecular carrier of linoleate: characterization and effects on intestinal epithelial cells in vitro. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:9476-9483. [PMID: 22924475 DOI: 10.1021/jf3028396] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The dairy protein β-lactoglobulin (βlg) is known to bind hydrophobic ligands such as fatty acids. In the present work, we investigated the biological activity in vitro of linoleate once complexed to bovine βlg. Binding of linoleate (C18:2) to bovine βlg was achieved by heating at 60 °C for 30 min at pH 7.4, resulting in a linoleate/βlg molar binding stoichiometry of 1.1, 2.1, and 3.4. Two types of binding sites were determined by ITC titrations. Binding of linoleate induced the formation of covalent dimers and trimers of βlg. The LD(50) on Caco-2 cells after 24 h was 58 μM linoleate. However, cell viability was unaffected when 200 μM linoleate was presented to the Caco-2 cells as part of the βlg complex. The Caco-2 cells did not increase mRNA transcript levels of long chain fatty acid transport genes, FATP4 and FABPpm, or increase levels of the cAMP signal, in response to the presence of 50 μM linoleate alone or as part of the βlg complex. Therefore, it is proposed that βlg can act as a molecular carrier and alter the bioaccessibility of linoleate/linoleic acid.
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Xu X, Wu P, Xu W, Shao Q, An L, Zhang H, Cai C, Zhao B. Effects of guanidinium ions on the conformational structure of glucose oxidase studied by electrochemistry, spectroscopy, and theoretical calculations: towards developing a chemical-induced protein conformation assay. Phys Chem Chem Phys 2012; 14:5824-36. [DOI: 10.1039/c2cp24121h] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Shao Q, Wu P, Gu P, Xu X, Zhang H, Cai C. Electrochemical and Spectroscopic Studies on the Conformational Structure of Hemoglobin Assembled on Gold Nanoparticles. J Phys Chem B 2011; 115:8627-37. [DOI: 10.1021/jp203344u] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Qian Shao
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu Key Laboratory of Biofunctional Materials, Laboratory of Electrochemistry, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210097, People's Republic of China
| | - Ping Wu
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu Key Laboratory of Biofunctional Materials, Laboratory of Electrochemistry, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210097, People's Republic of China
| | - Piao Gu
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu Key Laboratory of Biofunctional Materials, Laboratory of Electrochemistry, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210097, People's Republic of China
| | - Xiaoqing Xu
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu Key Laboratory of Biofunctional Materials, Laboratory of Electrochemistry, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210097, People's Republic of China
- Department of Pharmacy, College of Jiangsu Jiankang Profession, Nanjing 210029, People's Republic of China
| | - Hui Zhang
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu Key Laboratory of Biofunctional Materials, Laboratory of Electrochemistry, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210097, People's Republic of China
| | - Chenxin Cai
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu Key Laboratory of Biofunctional Materials, Laboratory of Electrochemistry, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210097, People's Republic of China
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Loch J, Polit A, Górecki A, Bonarek P, Kurpiewska K, Dziedzicka-Wasylewska M, Lewiński K. Two modes of fatty acid binding to bovine β-lactoglobulin-crystallographic and spectroscopic studies. J Mol Recognit 2010; 24:341-9. [DOI: 10.1002/jmr.1084] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2010] [Revised: 07/28/2010] [Accepted: 07/29/2010] [Indexed: 11/11/2022]
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10
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Wang Q, Xu W, Wu P, Zhang H, Cai C, Zhao B. New Insights into the Effects of Thermal Treatment on the Catalytic Activity and Conformational Structure of Glucose Oxidase Studied by Electrochemistry, IR Spectroscopy, and Theoretical Calculation. J Phys Chem B 2010; 114:12754-64. [DOI: 10.1021/jp106214v] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Qian Wang
- Jiangsu Key Laboratory of Biofunctional Materials, Laboratory of Electrochemistry, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210097, People’s Republic of China
| | - Wang Xu
- Jiangsu Key Laboratory of Biofunctional Materials, Laboratory of Electrochemistry, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210097, People’s Republic of China
| | - Ping Wu
- Jiangsu Key Laboratory of Biofunctional Materials, Laboratory of Electrochemistry, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210097, People’s Republic of China
| | - Hui Zhang
- Jiangsu Key Laboratory of Biofunctional Materials, Laboratory of Electrochemistry, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210097, People’s Republic of China
| | - Chenxin Cai
- Jiangsu Key Laboratory of Biofunctional Materials, Laboratory of Electrochemistry, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210097, People’s Republic of China
| | - Bo Zhao
- Jiangsu Key Laboratory of Biofunctional Materials, Laboratory of Electrochemistry, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210097, People’s Republic of China
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Jia J, Wang K, Shi W, Chen S, Li X, Ma H. Rhodamine B Piperazinoacetohydrazine: A Water-Soluble Spectroscopic Reagent for Pyruvic Acid Labeling. Chemistry 2010; 16:6638-43. [DOI: 10.1002/chem.200902660] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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12
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Jia J, Chen W, Ma H, Wang K, Zhao C. Use of a rhodamine-based bifunctional probe in N-terminal specific labeling of Thermomyces lanuginosus xylanase. MOLECULAR BIOSYSTEMS 2010; 6:1829-33. [DOI: 10.1039/c005223j] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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13
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Li X, Zheng W, Zhang L, Yu P, Lin Y, Su L, Mao L. Effective Electrochemical Method for Investigation of Hemoglobin Unfolding Based on the Redox Property of Heme Groups at Glassy Carbon Electrodes. Anal Chem 2009; 81:8557-63. [DOI: 10.1021/ac9015215] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Xianchan Li
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China
| | - Wei Zheng
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China
| | - Limin Zhang
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China
| | - Ping Yu
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China
| | - Yuqing Lin
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China
| | - Lei Su
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China
| | - Lanqun Mao
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China
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Chen S, Li X, Ma H. New Approach for Local Structure Analysis of the Tyrosine Domain in Proteins by Using a Site-Specific and Polarity-Sensitive Fluorescent Probe. Chembiochem 2009; 10:1200-7. [DOI: 10.1002/cbic.200900003] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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15
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Riihimäki LH, Vainio MJ, Heikura JMS, Valkonen KH, Virtanen VT, Vuorela PM. Binding of phenolic compounds and their derivatives to bovine and reindeer beta-lactoglobulin. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2008; 56:7721-7729. [PMID: 18700775 DOI: 10.1021/jf801120a] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
In plant-based food, phenolic compounds usually do not exist in their native form, but as esters, glycosides, or polymers. The native forms, however, require deglycosylation for their intestinal absorption, and aglycone has been considered to be the potential health-protecting/promoting form. The binding of the aglycones of phenolic compounds to bovine and reindeer beta-lactoglobulins (betaLG) using fluorescence quenching was studied. The effects of pH and storage were also studied. Of the compounds investigated, the majority of flavones, flavonols, flavanones, and isoflavones were bound to betaLG. In the pH studies, no significant effects were found. The fact that the phenolic compounds were not released at pH 2 might indicate that they bind to an external part rather than to the central cavity. Studies implicated that betaLG could act as a binder or carrier for phenolic compounds in acidic, basic, or neutral conditions and that the ligand/betaLG complex can remain stable during storage.
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Affiliation(s)
- Laura H Riihimäki
- Drug Discovery and Development Technology Center, Faculty of Pharmacy, University of Helsinki, P.O. Box 56 (Viikinkaari 5 E), Finland
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Wang X, Wang S, Ma H. Characterization of local polarity and structure of Cys121 domain in β-lactoglobulin with a new thiol-specific fluorescent probe. Analyst 2008; 133:478-84. [DOI: 10.1039/b717230c] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Wang S, Wang X, Shi W, Wang K, Ma H. Detection of local polarity and conformational changes at the active site of rabbit muscle creatine kinase with a new arginine-specific fluorescent probe. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2007; 1784:415-22. [PMID: 18082150 DOI: 10.1016/j.bbapap.2007.11.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2007] [Revised: 11/12/2007] [Accepted: 11/13/2007] [Indexed: 11/18/2022]
Abstract
A new polarity-sensitive fluorescent probe, 3-(4-chloro-6-p-glyoxal-phenoxy-1,3,5-triazinylamino)-7-(dimethylamino)-2-methylphenazine (CGTDP), is synthesized for selective labeling of active-site arginine residues. The probe comprises a neutral red moiety as a polarity-sensitive fluorophore and a phenylglyoxal unit as an arginine-specific labeling group. The probe exhibits a sensitive response of shift of fluorescence maximum emission wavelength to solvent polarity only instead of pH or temperature, which leads to the use of the probe in detecting the local polarity and conformational changes of the active site of rabbit muscle creatine kinase (CK) denatured by pH or temperature. The polarity of the active site domain has been first found to correspond to a dielectric constant of about 44, and the conformational change of the active site directly revealed by CGTDP occurs far before that of CK as a whole disclosed by the intrinsic tryptophan fluorescence during acid or thermal denaturation. The present strategy may provide a useful method to detect the local polarity and conformational changes of the active sites of many enzymes that employ arginine residues as anion recognition sites under different denaturation conditions.
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Affiliation(s)
- Shujuan Wang
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
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