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Li X, Li W, Chen F, Xiao J, Liao X, Hu X, Ji J, Ma L. Guideline for measurement of condensed tannin. FOOD FRONTIERS 2022. [DOI: 10.1002/fft2.174] [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] Open
Affiliation(s)
- Xiaohui Li
- College of Food Science and Nutritional Engineering, National Engineering Research Centre for Fruits and Vegetables Processing, Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture, Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education China Agricultural University Beijing China
- Xinghua Industrial Research Centre for Food Science and Human Health China Agricultural University Xinghua China
| | - Wei Li
- College of Food Science and Nutritional Engineering, National Engineering Research Centre for Fruits and Vegetables Processing, Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture, Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education China Agricultural University Beijing China
| | - Fang Chen
- College of Food Science and Nutritional Engineering, National Engineering Research Centre for Fruits and Vegetables Processing, Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture, Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education China Agricultural University Beijing China
| | - Jianbo Xiao
- Nutrition and Bromatology Group, Faculty of Food Science and Technology, Department of Analytical Chemistry and Food Science University of Vigo—Ourense Campus Ourense Spain
| | - Xiaojun Liao
- College of Food Science and Nutritional Engineering, National Engineering Research Centre for Fruits and Vegetables Processing, Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture, Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education China Agricultural University Beijing China
| | - XiaoSong Hu
- College of Food Science and Nutritional Engineering, National Engineering Research Centre for Fruits and Vegetables Processing, Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture, Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education China Agricultural University Beijing China
| | - Junfu Ji
- College of Food Science and Nutritional Engineering, National Engineering Research Centre for Fruits and Vegetables Processing, Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture, Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education China Agricultural University Beijing China
- Xinghua Industrial Research Centre for Food Science and Human Health China Agricultural University Xinghua China
| | - Lingjun Ma
- College of Food Science and Nutritional Engineering, National Engineering Research Centre for Fruits and Vegetables Processing, Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture, Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education China Agricultural University Beijing China
- Xinghua Industrial Research Centre for Food Science and Human Health China Agricultural University Xinghua China
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Nekrasova NA, Kurbatova SV. Quantitative structure–chromatographic retention correlations of quinoline derivatives. J Chromatogr A 2017; 1492:55-60. [DOI: 10.1016/j.chroma.2017.02.063] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 02/07/2017] [Accepted: 02/26/2017] [Indexed: 12/19/2022]
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Todoroki K, Nakano T, Watanabe H, Min JZ, Inoue K, Ishikawa Y, Toyo'oka T. Computational prediction of diastereomeric separation behavior of fluorescent o-phthalaldehyde derivatives of amino acids. ANAL SCI 2015; 30:865-70. [PMID: 25213814 DOI: 10.2116/analsci.30.865] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We have developed a convenient method for predicting the LC resolution of amino acid diastereomers through computational calculations. For acquiring experimental data, we derivatized 10 amino acids using o-phthalaldehyde and N-acetyl-L-cysteine as fluorogenic diastereomer-forming reagents and analyzed the diastereomers using reversed-phase LC and fluorescence detection. For theoretical chemical calculations, we used the publicly available semi-empirical calculation software MOPAC2012. Using the obtained experimental and theoretical data, we determined the change in analytical resolution with differences in the structure of the diastereomers. From the results obtained, we concluded that greater conformational change through diastereomeric derivatization induced an increase in the contact area with the stationary phase, leading to higher resolution.
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Affiliation(s)
- Kenichiro Todoroki
- Laboratory of Analytical and Bio-Analytical Chemistry, School of Pharmaceutical Sciences, University of Shizuoka
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Tsai CW, Jheng SL, Chen WY, Ruaan RC. Strategy of Fc-Recognizable Peptide Ligand Design for Oriented Immobilization of Antibody. Anal Chem 2014; 86:2931-8. [DOI: 10.1021/ac4029467] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Ching-Wei Tsai
- Department
of Chemical and Materials Engineering, National Central University, Chung-Li City, Taoyuan 32001, Taiwan
| | - Siang-Long Jheng
- Department
of Chemical and Materials Engineering, National Central University, Chung-Li City, Taoyuan 32001, Taiwan
| | - Wen-Yih Chen
- Department
of Chemical and Materials Engineering, National Central University, Chung-Li City, Taoyuan 32001, Taiwan
- Institute
of Biomedical Engineering, National Central University, Chung-Li City, Taoyuan 32001, Taiwan
| | - Ruoh-Chyu Ruaan
- Department
of Chemical and Materials Engineering, National Central University, Chung-Li City, Taoyuan 32001, Taiwan
- Institute
of Biomedical Engineering, National Central University, Chung-Li City, Taoyuan 32001, Taiwan
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Barak JA, Kennedy JA. HPLC retention thermodynamics of grape and wine tannins. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:4270-4277. [PMID: 23565723 DOI: 10.1021/jf400366z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The effect of grape and wine tannin structure on retention thermodynamics under reversed-phase high-performance liquid chromatography conditions on a polystyrene divinylbenzene column was investigated. On the basis of retention response to temperature, an alternative retention factor was developed to approximate the combined temperature response of the complex, unresolvable tannin mixture. This alternative retention factor was based upon relative tannin peak areas separated by an abrupt change in solvent gradient. Using this alternative retention factor, retention thermodynamics were calculated. Van't Hoff relationships of the natural log of the alternative retention factor against temperature followed Kirchoff's relationship. An inverse quadratic equation was fit to the data, and from this the thermodynamic parameters for tannin retention were calculated. All tannin fractions exhibited exothermic, spontaneous interaction, with enthalpy-entropy compensation observed. Normalizing for tannin size, distinct tannin compositional effects on thermodynamic parameters were observed. The results of this study indicate that HPLC can be valuable for measuring the thermodynamics of tannin interaction with a hydrophobic surface and provides a potentially valuable alternative to calorimetry. Furthermore, the information gathered may provide insight into understanding red wine astringency quality.
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Affiliation(s)
- Jennifer A Barak
- Department of Viticulture and Enology, California State University, Fresno, California 93740-8003, United States
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Lindsey RK, Rafferty JL, Eggimann BL, Siepmann JI, Schure MR. Molecular simulation studies of reversed-phase liquid chromatography. J Chromatogr A 2013; 1287:60-82. [PMID: 23489490 DOI: 10.1016/j.chroma.2013.02.040] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Revised: 02/10/2013] [Accepted: 02/11/2013] [Indexed: 11/28/2022]
Abstract
Over the past 20 years, molecular simulation methods have been applied to the modeling of reversed-phase liquid chromatography (RPLC). The purpose of these simulations was to provide a molecular-level understanding of: (i) the structure and dynamics of the bonded phase and its interface with the mobile phase, (ii) the interactions of analytes with the bonded phase, and (iii) the retention mechanism for different analytes. However, the investigation of chromatographic systems poses significant challenges for simulations with respect to the accuracy of the molecular mechanics force fields and the efficiency of the sampling algorithms. This review discusses a number of aspects concerning molecular simulation studies of RPLC systems including the historical development of the subject, the background needed to understand the two prevalent techniques, molecular dynamics (MD) and Monte Carlo (MC) methods, and the wealth of insight provided by these simulations. Examples from the literature employing MD approaches and from the authors' laboratory using MC methods are discussed. The former can provide information on chain dynamics and transport properties, whereas the latter techniques are uniquely suited for the investigation of phase and sorption equilibria that underly RPLC retention, and both can be used to elucidate the bonded-chain conformations and solvent distributions.
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Affiliation(s)
- Rebecca K Lindsey
- Department of Chemistry and Chemical Theory Center, University of Minnesota, 207 Pleasant Street SE, Minneapolis, MN 55455-0431, USA
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Tsai CW, Chen WY, Ruaan RC. Retention prediction of peptide diastereomers in reversed-phase liquid chromatography assisted by molecular dynamics simulation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:13601-13608. [PMID: 22946847 DOI: 10.1021/la302312m] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In this study, we explored the relationship between the retention factors and structural flexibilities of peptide diastereomers in reversed-phase chromatography (RPC) based on thermodynamic interpretations. The RPC retention order of antimicrobial peptides, IL-K7F89 (H-ILPWKWKFFPWRR-NH(2)), and its four diastereomers were well correlated with the order of their conformation energies in elution solvent. In particular, when the composition of the sample loading solvent was altered, the retention order changed accordingly. The thermodynamic analysis revealed that the peptide adsorption was driven by adsorption enthalpy, but the retention order was dominated by adsorption entropy. To further understand the relationships between the retention factor and conformation energy, the intramolecular van der Waals energy of peptides and the ordered water molecules associated with peptides were analyzed by all-atom molecular dynamics (MD) simulation. The results showed that the flexible peptide with larger conformation energy had weaker intramolecular hydrophobic interaction and associated with more ordered water molecules. For this peptide diastereomer set, the elution difference is derived by the difference in adsorption entropy gain from repelling the ordered water molecules around the peptide. Consequently, we suggested that the separation of peptide diastereomers could be achieved by RPC, and the elution order could be predicted by their structural flexibilities.
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Affiliation(s)
- C Wei Tsai
- Department of Chemical and Materials Engineering, National Central University, Jhong-Li, Taiwan 32001
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Structural stability–chromatographic retention relationship on exenatide diastereomer separation. Anal Bioanal Chem 2012; 404:2437-44. [DOI: 10.1007/s00216-012-6352-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2012] [Revised: 08/03/2012] [Accepted: 08/13/2012] [Indexed: 10/27/2022]
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Tsai CW, Ruaan RC, Liu CI. Adsorption of antimicrobial indolicidin-derived peptides on hydrophobic surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:10446-10452. [PMID: 22721449 DOI: 10.1021/la301401v] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The hydrophobic interaction between antimicrobial peptides and membrane hydrophobic cores is usually related to their cytotoxicity. In this study, the adsorption mechanism of five plasma membrane-associated peptides, indolicidin (IL) and its four derivatives, with hydrophobic ligands was investigated to understand the relationship between peptide hydrophobicity and bioactivity. The hydrophobic adsorption mechanisms of IL and its derivatives were interpreted thermodynamically and kinetically by reversed-phase chromatography (RPC) analysis and surface plasmon resonance (SPR) measurement, respectively. IL and its derivatives possess a similar random coil structure in both aqueous and organic solvents. Thermodynamic analysis showed that the binding enthalpy of peptides with higher electropositivity was lower than those with lower electropositivity and exhibited unfavorable binding entropy. Higher electropositivity peptides adsorbed to the hydrophobic surface arising from the less bound solvent on the peptide surface. A comparison with the kinetic analysis showed that IL and its derivatives adopt a two-state binding model (i.e., adsorption onto and self-association on the hydrophobic acyl chain) to associate with the hydrophobic surface, and the binding affinity of peptide self-association correlates well with peptide hemolysis. Consequently, this study provided a novel concept for understanding the action of plasma membrane-associated peptides.
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Affiliation(s)
- Ching-Wei Tsai
- Department of Chemical and Materials Engineering, National Central University, Jhong-Li, Taiwan
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Comparison of molecular dynamics simulation methods for amyloid β(1-42) monomers containing D-aspartic acid residues for predicting retention times in chromatography. J Chromatogr B Analyt Technol Biomed Life Sci 2011; 879:3337-43. [PMID: 21871847 DOI: 10.1016/j.jchromb.2011.08.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2010] [Revised: 08/01/2011] [Accepted: 08/09/2011] [Indexed: 11/21/2022]
Abstract
Molecular dynamics simulations of amyloid β(1-42) containing D-aspartic acid residues were performed using several continuous solvent models to investigate the usefulness of simulation methods for D-amino acid-containing proteins and peptides. Normal molecular dynamics simulations and replica exchange molecular dynamics simulations, which are one of the generalized-ensemble algorithms, were performed. Because the β-structure contents of amyloid β(1-42) peptides obtained by replica exchange molecular dynamics simulations with Onufriev-Bashford-Case generalized Born implicit solvent were qualitatively consistent with experimental data, replica exchange molecular dynamics rather than other methods appeared to be more reasonable for calculations of amyloid β(1-42) containing D-aspartic acid residues. Computational results revealed that peptides with stereoinversion of Asp23 tend to form β-sheet structures by themselves, in contrast to the wild-type peptides that form β-sheet structures only after aggregation. These results are expected to be useful for computational investigations of proteins and peptides such as prediction of retention time of peptides and proteins containing D-aspartic acid residues.
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