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De Souza TPP, Cantão LXS, Rodrigues MQRB, Gonçalves DB, Nagem RAP, Rocha REO, Godoi RR, Lima WJN, Galdino AS, Minardi RCDM, Lima LHFD. Glycosylation and charge distribution orchestrates the conformational ensembles of a biotechnologically promissory phytase in different pHs - a computational study. J Biomol Struct Dyn 2024; 42:5030-5041. [PMID: 37325852 DOI: 10.1080/07391102.2023.2223685] [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: 03/27/2023] [Accepted: 06/06/2023] [Indexed: 06/17/2023]
Abstract
Phytases [myo-inositol(1,2,3,4,5,6) hexakisphosphate phosphohydrolases] are phytate-specific phosphatases not present in monogastric animals. Nevertheless, they are an essential supplement to feeding such animals and for human special diets. It is crucial, hence, the biotechnological use of phytases with intrinsic stability and activity at the acid pHs from gastric environments. Here we use Metadynamics (METADY) simulations to probe the conformational space of the Aspergillus nidulans phytase and the differential effects of pH and glycosylation in this same space. The results suggest that strategic combinations of pH and glycosylation affect the stability of native-like conformations and alternate these structures from a metastable to a stable profile. Furthermore, the protein segments previously reported as more thermosensitive in phytases from this family present a pivotal role in the conformational changes at different conditions, especially H2, H5-7, L8, L10, L12, and L17. Also, the glycosylations and the pH-dependent charge balance modulate the mobility and interactions at these same regions, with consequences for the surface solvation and active site exposition. Finally, although the glycosylations have stabilized the native structure and improved the substrate docking at all the studied pHs, the data suggest a higher phytate receptivity at catalytic poses for the unglycosylated structure at pH 6.5 and the glycosylated one at pH 4.5. This behavior agrees with the exact change in optimum pH reported for this enzyme, expressed on low or high glycosylating systems. We hope the results and insights presented here will be helpful in future approaches for rational engineering of technologically promising phytases and intelligent planning of their heterologous expression systems and conditions for use.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Thaís P P De Souza
- Microbial Biotechnology Laboratory, Universidade Federal de São João Del-Rei, Divinópolis, Minas Gerais, Brazil
| | - Letícia Xavier Silva Cantão
- Laboratory of Bioinformatics and Systems (LBS), Department Of Computer Science, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | - Daniel Bonoto Gonçalves
- Department of Biosystems Engineering, Universidade Federal de São João Del-Rei, São João Del-Rei, Minas Gerais, Brazil
| | - Ronaldo Alves Pinto Nagem
- Institute of Biological Sciences Department of Biochemistry and Immunology, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Rafael Eduardo Oliveira Rocha
- Laboratory of Bioinformatics and Systems (LBS), Department Of Computer Science, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- Laboratory Of Molecular Modeling and Bioinformatics, Department of Exacts and Biological Sciences (DECEB), Universidade Federal de São João Del-Rei, Sete Lagoas, Minas Gerais, Brazil
| | - Renato Ramos Godoi
- Institute of Biological Sciences Department of Biochemistry and Immunology, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - William James Nogueira Lima
- Institute of Agricultural Sciences, Universidade Federal de Minas Gerais, Campus Regional de Montes Claros, Montes Claros, Minas Gerais, Brazil
| | - Alexsandro Sobreira Galdino
- Microbial Biotechnology Laboratory, Universidade Federal de São João Del-Rei, Divinópolis, Minas Gerais, Brazil
| | - Raquel Cardoso de Melo Minardi
- Laboratory of Bioinformatics and Systems (LBS), Department Of Computer Science, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Leonardo Henrique França de Lima
- Laboratory Of Molecular Modeling and Bioinformatics, Department of Exacts and Biological Sciences (DECEB), Universidade Federal de São João Del-Rei, Sete Lagoas, Minas Gerais, Brazil
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Mahmoudi F, Shahraki M. Computational study of inclusion complexes of V-type nerve agents (VE, VG, VM, VR and VX) with β-cyclodextrin. J Biomol Struct Dyn 2024; 42:2681-2697. [PMID: 37144740 DOI: 10.1080/07391102.2023.2208226] [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: 03/06/2023] [Accepted: 04/19/2023] [Indexed: 05/06/2023]
Abstract
The effective detoxification of organophosphate (OP) nerve agents (OPNAs) is a challenging issue for scientists. The host-guest inclusion complexes of five V-type nerve agents (VE, VG, VM, VR and VX) with β-cyclodextrin (β-CD) have been studied by combining quantum mechanical (QM) calculations and molecular dynamics (MD) simulations. The frontier molecular orbital (FMO) and molecular electrostatic potential (MEP) have been analyzed to describe the reactivity parameters and electronic properties. The obtained results clearly reveal that stable complexes were formed in both vacuum and water media, and the complexation process occurred spontaneously. To understand non-covalent interactions, natural bond orbital (NBO) and quantum theory of atoms in molecules (QTAIM) have been used. IR and Raman spectra have been calculated to confirm the formation of complexes and also thermodynamic parameters have been investigated. It was demonstrated that in addition to van der Waals interactions, the presence of intermolecular hydrogen bonds enhances the stability of these complexes. Furthermore, MD simulations were carried out to get a better insight into the inclusion process of the above complexes. From MD simulations, all simulated systems reached full equilibration at 1000 ps and the V-agent molecules consistently remained in the β-CD cavity and only had vibrational motion inside the cavity. More importantly, MD simulations support the findings of QM calculations and indicate that hydrogen bonding can help the leaving groups of V-agents to be released and them to be hydrolyzed. All results have shown that the VR agent formed the most stable complex with β-CD molecule than that of other agents.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Fatemeh Mahmoudi
- Department of Chemistry, Faculty of Science, University of Sistan and Baluchestan, Zahedan, Iran
| | - Mehdi Shahraki
- Department of Chemistry, Faculty of Science, University of Sistan and Baluchestan, Zahedan, Iran
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3
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Kou X, Su D, Pan F, Xu X, Meng Q, Ke Q. Molecular dynamics simulation techniques and their application to aroma compounds/cyclodextrin inclusion complexes: A review. Carbohydr Polym 2024; 324:121524. [PMID: 37985058 DOI: 10.1016/j.carbpol.2023.121524] [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: 08/29/2023] [Revised: 10/16/2023] [Accepted: 10/22/2023] [Indexed: 11/22/2023]
Abstract
Homeostatic technologies play a crucial role in maintaining the quality and extending the service life of aroma compounds (ACs). Commercial cyclodextrins (CDs) are commonly used to form inclusion complexes (ICs) with ACs to enhance their solubility, stability, and morphology. The selection of suitable CDs and ACs is of paramount importance in this process. Molecular dynamics (MD) simulations provide an in-depth understanding of the interactions between ACs and CDs, aiding researchers in optimising the properties and effects of ICs. This review offers a systematic discussion of the application of MD simulations in ACs/CDs ICs, covering the establishment of the simulation process, parameter selection, model evaluation, and various application cases, along with their advantages and disadvantages. Additionally, this review summarises the major achievements and challenges of this method while identifying areas that require further exploration. These findings may contribute to a comprehensive understanding of the formation and stabilization mechanisms of ACs/CDs ICs and offer guidance for the selection and computational characterisation of CDs in the AC steady state.
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Affiliation(s)
- Xingran Kou
- Collaborative Innovation Center of Fragrance Flavour and Cosmetics, School of Perfume and Aroma Technology (Shanghai Research Institute of Fragrance & Flavour Industry), Shanghai Institute of Technology, Shanghai, China; Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, China
| | - Dongdong Su
- Collaborative Innovation Center of Fragrance Flavour and Cosmetics, School of Perfume and Aroma Technology (Shanghai Research Institute of Fragrance & Flavour Industry), Shanghai Institute of Technology, Shanghai, China
| | - Fei Pan
- State Key Laboratory of Resource Insects, Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing 100093, China
| | - Xiwei Xu
- Collaborative Innovation Center of Fragrance Flavour and Cosmetics, School of Perfume and Aroma Technology (Shanghai Research Institute of Fragrance & Flavour Industry), Shanghai Institute of Technology, Shanghai, China
| | - Qingran Meng
- Collaborative Innovation Center of Fragrance Flavour and Cosmetics, School of Perfume and Aroma Technology (Shanghai Research Institute of Fragrance & Flavour Industry), Shanghai Institute of Technology, Shanghai, China.
| | - Qinfei Ke
- Collaborative Innovation Center of Fragrance Flavour and Cosmetics, School of Perfume and Aroma Technology (Shanghai Research Institute of Fragrance & Flavour Industry), Shanghai Institute of Technology, Shanghai, China; Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, China.
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4
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Kumar P, Bhardwaj VK, Purohit R. Highly robust quantum mechanics and umbrella sampling studies on inclusion complexes of curcumin and β-cyclodextrin. Carbohydr Polym 2024; 323:121432. [PMID: 37940299 DOI: 10.1016/j.carbpol.2023.121432] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 09/12/2023] [Accepted: 09/23/2023] [Indexed: 11/10/2023]
Abstract
The poor aqueous solubility of curcumin (CUR) obstructs its wide utilization in nutraceuticals, cosmetics, and pharmaceutical companies. This study is dedicated to investigate the stability of CUR inside the hydrophobic pocket of β-cyclodextrin (β-CD), hydroxypropyl-β-CD (HP-β-CD), and 2,6-Di-O-methyl-β-CD (DM-β-CD). Initially, molecular mechanics (MM) calculations and subsequently quantum mechanical (QM) calculations were performed on inclusion complexes to strengthen the MM results. We performed microsecond timescale MD simulations to observe the structural dynamics of CUR inside the cavity of CDs. We elucidated the most stable binding orientations of CUR inside the cavity of CDs based on binding free energy obtained from the Molecular Mechanics Poisson-Boltzmann Surface Area (MM-PBSA) and umbrella sampling simulations. Furthermore, the two-layered ONIOM (B3LYP/6-311+G(2d,p):PM7) method with CPCM implicit water model was used to derive the complete energetics and thermodynamics of inclusion complexes at 1:1 stoichiometry. Each inclusion reaction was exothermic and spontaneous. The chemical reactivity and kinetic stability of inclusion complexes were described by HOMO-LUMO molecular orbital energies. In conclusion, our studies revealed that HP-β-CD had the highest binding affinity for CUR with the most negative complexation energy (-6520.69 kJ/mol) and Gibb's free energy change (-6448.20 kJ/mol). The atomic-level investigation of noncovalent interactions between CUR and the hydroxypropyl groups in HP-β-CD/CUR complex may be helpful to drive new derivatives of HP-β-CD with better host capacity. The computational strategy adopted here might serve as a benchmark for increasing the solubility of numerous clinically significant molecules.
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Affiliation(s)
- Pramod Kumar
- Structural Bioinformatics Lab, Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology (CSIR-IHBT), Palampur, HP 176061, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad- 201002, India
| | - Vijay Kumar Bhardwaj
- Structural Bioinformatics Lab, Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology (CSIR-IHBT), Palampur, HP 176061, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad- 201002, India
| | - Rituraj Purohit
- Structural Bioinformatics Lab, Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology (CSIR-IHBT), Palampur, HP 176061, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad- 201002, India.
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5
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Ganjali Koli M, Eshaghi Malekshah R, Hajiabadi H. Insights from molecular dynamics and DFT calculations into the interaction of 1,4-benzodiazepines with 2-hydroxypropyl-βCD in a theoretical study. Sci Rep 2023; 13:9866. [PMID: 37332009 DOI: 10.1038/s41598-023-36385-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 06/02/2023] [Indexed: 06/20/2023] Open
Abstract
This study delves into the interaction between benzodiazepine (BZD) drugs and 2-hydroxypropyl-β-cyclodextrin (2HPβCD), a cyclodextrin (CD) known to improve drug delivery and enhance therapeutic outcomes. We find that the 2HPβCD's atoms become more rigid in the presence of chlordiazepoxide (CDP), clonazepam (CLZ), and diazepam (DZM), whereas they become more flexible in the presence of nordazepam (NDM) and nitrazepam (NZP). We also investigated the structure of 2HPβCD and found that loading these drugs increases both the area and volume of the 2HPβCD cavity, making it more suitable for drug delivery. Moreover, this research found that all drugs exhibited negative values for the binding free energy, indicating thermodynamic favorability and improved solubility. The binding free energy order of the BZDs was consistent in both molecular dynamics and Monte Carlo methods, with CDP and DZM having the highest affinity for binding. We also analyzed the contribution of different interaction energies in binding between the carrier and the drugs and found that Van der Waals energy is the primary component. Our results indicate that the number of hydrogen bonds between 2HPβCD/water slightly decreases in the presence of BZDs, but the hydrogen bond's quality remains constant.
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Affiliation(s)
- Mokhtar Ganjali Koli
- InSilicoSci Computational Research Centre, Nikopardazesh Ltd., Karaj, Iran
- Department of Chemistry, University of Kurdistan, Sanandaj, Iran
| | | | - Hossein Hajiabadi
- InSilicoSci Computational Research Centre, Nikopardazesh Ltd., Karaj, Iran
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Sangkhawasi M, Kerdpol K, Ismail A, Nutho B, Hanpiboon C, Wolschann P, Krusong K, Rungrotmongkol T, Hannongbua S. In Vitro and In Silico Study on the Molecular Encapsulation of α-Tocopherol in a Large-Ring Cyclodextrin. Int J Mol Sci 2023; 24:ijms24054425. [PMID: 36901859 PMCID: PMC10002136 DOI: 10.3390/ijms24054425] [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: 01/29/2023] [Revised: 02/17/2023] [Accepted: 02/22/2023] [Indexed: 02/25/2023] Open
Abstract
α-tocopherol is the physiologically most active form of vitamin E, with numerous biological activities, such as significant antioxidant activity, anticancer capabilities, and anti-aging properties. However, its low water solubility has limited its potential use in the food, cosmetic, and pharmaceutical industries. One possible strategy for addressing this issue is the use of a supramolecular complex with large-ring cyclodextrins (LR-CDs). In this study, the phase solubility of the CD26/α-tocopherol complex was investigated to assess the possible ratios between host and guest in the solution phase. Next, the host-guest association of the CD26/α-tocopherol complex at different ratios of 1:2, 1:4, 1:6, 2:1, 4:1, and 6:1 was studied by all-atom molecular dynamics (MD) simulations. At 1:2 ratio, two α-tocopherol units interact spontaneously with CD26, forming an inclusion complex, as supported by the experimental data. In the 2:1 ratio, a single α-tocopherol unit was encapsulated by two CD26 molecules. In comparison, increasing the number of α-tocopherol or CD26 molecules above two led to self-aggregation and consequently limited the solubility of α-tocopherol. The computational and experimental results indicate that a 1:2 ratio could be the most suitable stoichiometry to use in the CD26/α-tocopherol complex to improve α-tocopherol solubility and stability in inclusion complex formation.
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Affiliation(s)
- Mattanun Sangkhawasi
- Center of Excellence in Computational Chemistry (CECC), Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
- Center of Excellence in Structural and Computational Biology, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Khanittha Kerdpol
- Center of Excellence in Computational Chemistry (CECC), Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Abbas Ismail
- Center of Excellence in Structural and Computational Biology, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Bodee Nutho
- Department of Pharmacology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Chonnikan Hanpiboon
- Center of Excellence in Structural and Computational Biology, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Peter Wolschann
- Institute of Theoretical Chemistry, University of Vienna, 1090 Vienna, Austria
| | - Kuakarun Krusong
- Center of Excellence in Structural and Computational Biology, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Thanyada Rungrotmongkol
- Center of Excellence in Structural and Computational Biology, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
- Program in Bioinformatics and Computational Biology, Graduate School, Chulalongkorn University, Bangkok 10330, Thailand
- Correspondence: (T.R.); (S.H.); Tel.: +66-2218-5426 (T.R.); +66-8163-61957 (S.H.)
| | - Supot Hannongbua
- Center of Excellence in Computational Chemistry (CECC), Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
- Correspondence: (T.R.); (S.H.); Tel.: +66-2218-5426 (T.R.); +66-8163-61957 (S.H.)
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7
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Megariotis G, Mikaelian G, Avramopoulos A, Romanos N, Theodorou DN. Molecular simulations of fluoxetine in hydrated lipid bilayers, as well as in aqueous solutions containing β-cyclodextrin. J Mol Graph Model 2022; 117:108305. [PMID: 35987186 DOI: 10.1016/j.jmgm.2022.108305] [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: 05/09/2022] [Revised: 07/25/2022] [Accepted: 08/06/2022] [Indexed: 01/14/2023]
Abstract
Fluoxetine, which is a well-known antidepressant drug, is studied in hydrated cholesterol-free and cholesterol-containing lipid bilayers through unbiased and biased atomistic molecular dynamics simulations. The latter are conducted for the calculation of the potential of mean force (PMF) of fluoxetine along an axis perpendicular to the two leaflets of the bilayer. The PMF indicates that the drug prefers to reside inside the lipid phase and allows us to calculate important thermodynamic properties, such as the Gibbs energy difference of partitioning from the water to the lipid phase and the Gibbs energy barrier for hopping events between the two leaflets of the bilayer. The results from the biased simulations are in accord with the mass density profiles calculated from the unbiased simulations. Moreover, we estimate the effect of fluoxetine mole fraction on the order parameters of the lipid alkyl chains and on the area per lipid. It is also found that fluoxetine forms a hydrogen bond network with lipids and water molecules penetrating into the lipid phase. In addition, fluoxoetine is studied in detail in aqueous solutions containing β-cyclodextrin. It is observed from unbiased molecular dynamics simulations that the two aforementioned molecules form a noncovalent complex spontaneously and the calculated binding free energy is in agreement with the literature.
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Affiliation(s)
- Grigorios Megariotis
- School of Chemical Engineering, National Technical University of Athens (NTUA), 9 Heroon Polytechniou Street, Zografou Campus, Athens, GR, 15780, Greece.
| | - Georgios Mikaelian
- School of Chemical Engineering, National Technical University of Athens (NTUA), 9 Heroon Polytechniou Street, Zografou Campus, Athens, GR, 15780, Greece
| | - Aggelos Avramopoulos
- Department of Physics, University of Thessaly, 3rd Km Old National Road Lamia Athens, Lamia, GR, 35100, Greece
| | - Nikolaos Romanos
- School of Chemical Engineering, National Technical University of Athens (NTUA), 9 Heroon Polytechniou Street, Zografou Campus, Athens, GR, 15780, Greece
| | - Doros N Theodorou
- School of Chemical Engineering, National Technical University of Athens (NTUA), 9 Heroon Polytechniou Street, Zografou Campus, Athens, GR, 15780, Greece
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Cao C, Deng C, Hu J, Zhou Y. Formation and molecular dynamics simulation of inclusion complex of large-ring cyclodextrin and 4-terpineol. J Food Sci 2022; 87:4609-4621. [PMID: 36086891 DOI: 10.1111/1750-3841.16303] [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: 04/11/2022] [Revised: 07/22/2022] [Accepted: 08/02/2022] [Indexed: 12/01/2022]
Abstract
In the present study, the formation and structure of the inclusion compound of large-ring cyclodextrin and 4-terpineol were obtained through different experiments and molecular dynamics (MD) simulation. The analysis of FTIR, 1 H-NMR, and thermodynamic results confirmed the formation of clathrates. Analysis of molecular structure (root-mean-square deviation and radius of gyration), solubility, and interaction energy (Coul, H bond) based on MD simulations further clarified the nature of the clathrate and the conformational changes caused by guest molecules as well as inclusion complexes process trends. The inclusion complex reportedly has a new crystal structure with improved thermal stability. PRACTICAL APPLICATION: This is the first work to demonstrate the complex formation between 4-terpineol and large-ring cyclodextrin by molecular dynamics simulation. Molecular dynamics simulation confirmed the formation of inclusion complexes theoretically. Conformational changes of the molecules and the formation of complexes with improved thermal stability were observed. Complexing with large-ring cyclodextrin can be used as an effective means to encapsulate the aroma/flavor compounds.
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Affiliation(s)
- Chuan Cao
- The College of Environment and Chemical Engineering, Anhui Vocational and Technical College, Hefei, China.,Anhui Engineering Laboratory of Agricultural Products Processing, Anhui Agricultural University, Hefei, China
| | - Changyue Deng
- Anhui Engineering Laboratory of Agricultural Products Processing, Anhui Agricultural University, Hefei, China
| | - Jinwei Hu
- Anhui Engineering Laboratory of Agricultural Products Processing, Anhui Agricultural University, Hefei, China
| | - Yibin Zhou
- Anhui Engineering Laboratory of Agricultural Products Processing, Anhui Agricultural University, Hefei, China
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Current Status of Quantum Chemical Studies of Cyclodextrin Host-Guest Complexes. Molecules 2022; 27:molecules27123874. [PMID: 35744998 PMCID: PMC9229288 DOI: 10.3390/molecules27123874] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 06/09/2022] [Accepted: 06/13/2022] [Indexed: 12/30/2022] Open
Abstract
This article aims to review the application of various quantum chemical methods (semi-empirical, density functional theory (DFT), second order Møller-Plesset perturbation theory (MP2)) in the studies of cyclodextrin host-guest complexes. The details of applied approaches such as functionals, basis sets, dispersion corrections or solvent treatment methods are analyzed, pointing to the best possible options for such theoretical studies. Apart from reviewing the ways that the computations are usually performed, the reasons for such studies are presented and discussed. The successful applications of theoretical calculations are not limited to the determination of stable conformations but also include the prediction of thermodynamic properties as well as UV-Vis, IR, and NMR spectra. It has been shown that quantum chemical calculations, when applied to the studies of CD complexes, can provide results unobtainable by any other methods, both experimental and computational.
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Boonma T, Nutho B, Sungthong B, Sripadung P, Rungrotmongkol T, Nunthaboot N. Molecular insights into complex formation between scandenin and various types of β-cyclodextrin. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Mishra P, Gupta P, Srivastava AK, Poluri KM, Prasad R. Eucalyptol/ β-cyclodextrin inclusion complex loaded gellan/PVA nanofibers as antifungal drug delivery system. Int J Pharm 2021; 609:121163. [PMID: 34624448 DOI: 10.1016/j.ijpharm.2021.121163] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 10/01/2021] [Accepted: 10/02/2021] [Indexed: 12/26/2022]
Abstract
Fungal infections pose a serious threat to humankind due to the toxicity of conventional antifungal therapy and continuous emerging incidence of multidrug resistance. Essential oils fascinated researchers because of their broad antimicrobial activity and minimal cytotoxicity. However, hydrophobic, volatile and low water solubility of essential oils hinder their applications in pharmaceutical industries. Therefore, in this study we have loaded eucalyptol/ β-cyclodextrin inclusion complex to gellan/polyvinyl alcohol nanofibers (EPNF) to eradicate Candida albicans and Candida glabrata biofilms. The electrospun nanofibers characterized by various physicochemical techniques and it was observed that EPNF possess highly hydrophilic surface property that facilitate rapid drug release. EPNF inhibited approximately 70% biofilm of C. albicans and C. glabrata. Time kill results depicted that eucalyptol (EPTL) encapsulation in the nanofibers prolonged its antifungal activity than the pure EPTL. Electron microscopy studies revealed that EPNF disrupted the cell surface of Candida. Collectively the current study suggested nanofiber encapsulation enhanced antibiofilm activity of eucalyptol and these nanoscale systems can serve as an alternative therapeutic strategy to treat fungal infections. Further, the developed nanofibrous materials can be applied as cost effective coating agent for biomedical implants.
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Affiliation(s)
- Purusottam Mishra
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
| | - Payal Gupta
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
| | - Amit Kumar Srivastava
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
| | - Krishna Mohan Poluri
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India; Centre for Nanotechnology, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
| | - Ramasare Prasad
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
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Jafari G, Raissi H, Shahabi M. Assessment of sulfobutylether-beta-cyclodextrin as a promising Fluorometholone molecule container: DFT, Docking, Molecular dynamics and MM-PBSA free energy calculations. MOLECULAR SIMULATION 2021. [DOI: 10.1080/08927022.2021.1996575] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
| | - Heidar Raissi
- Chemistry Department, University of Birjand, Birjand, Iran
| | - Mahnaz Shahabi
- Chemistry Department, University of Birjand, Birjand, Iran
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13
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Kerdpol K, Nutho B, Krusong K, Poo-arporn RP, Rungrotmongkol T, Hannongbua S. Encapsulation of α-tocopherol in large-ring cyclodextrin containing 26 α-D-glucopyranose units: A molecular dynamics study. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116802] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Mazurek AH, Szeleszczuk Ł, Gubica T. Application of Molecular Dynamics Simulations in the Analysis of Cyclodextrin Complexes. Int J Mol Sci 2021; 22:9422. [PMID: 34502331 PMCID: PMC8431145 DOI: 10.3390/ijms22179422] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 08/27/2021] [Accepted: 08/27/2021] [Indexed: 11/17/2022] Open
Abstract
Cyclodextrins (CDs) are highly respected for their ability to form inclusion complexes via host-guest noncovalent interactions and, thus, ensofance other molecular properties. Various molecular modeling methods have found their applications in the analysis of those complexes. However, as showed in this review, molecular dynamics (MD) simulations could provide the information unobtainable by any other means. It is therefore not surprising that published works on MD simulations used in this field have rapidly increased since the early 2010s. This review provides an overview of the successful applications of MD simulations in the studies on CD complexes. Information that is crucial for MD simulations, such as application of force fields, the length of the simulation, or solvent treatment method, are thoroughly discussed. Therefore, this work can serve as a guide to properly set up such calculations and analyze their results.
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Affiliation(s)
- Anna Helena Mazurek
- Department of Physical Chemistry, Chair of Physical Pharmacy and Bioanalysis, Faculty of Pharmacy, Doctoral School, Medical University of Warsaw, Banacha 1 Street, 02-093 Warsaw, Poland;
| | - Łukasz Szeleszczuk
- Department of Physical Chemistry, Chair of Physical Pharmacy and Bioanalysis, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1 Street, 02-093 Warsaw, Poland;
| | - Tomasz Gubica
- Department of Physical Chemistry, Chair of Physical Pharmacy and Bioanalysis, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1 Street, 02-093 Warsaw, Poland;
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15
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Yan X, Wang Y, Meng T, Yan H. Computational Insights Into the Influence of Substitution Groups on the Inclusion Complexation of β-Cyclodextrin. Front Chem 2021; 9:668400. [PMID: 34095084 PMCID: PMC8176092 DOI: 10.3389/fchem.2021.668400] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 05/03/2021] [Indexed: 11/21/2022] Open
Abstract
Cyclodextrins (CDs) and their derivatives have good prospects in soil remediation application due to their ability to enhance the stability and solubility of low water-soluble compounds by inclusion performance. To investigate the effect of different structural properties of cyclodextrin and its derivatives on the inclusion complexation, molecular dynamic (MD) simulations were performed on the inclusion complexes formed by three kinds of CDs with polycyclic aromatic hydrocarbons (PAHs). Based on neutral β-CD, the other two CDs were modified by introducing substitutional groups, including 2-hydroxypropyl and sulfonated butyl (SBE) functional groups in the ring structure, called HP-CD and SBE-CD. MD results show that PAH can merely enter into the cavity of SBE–β-CD from its wide rim. The substitutional groups significantly affect the structure of CDs, which may also cause the flipping of the glucose units. However, the substitutional groups can also enlarge the volume of the hydrophobic cavity, resulting in a tight combination with the guest molecules.
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Affiliation(s)
- Xianghua Yan
- School of Pharmaceutical Sciences, Liaocheng University, Liaocheng, China.,School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, China
| | - Yue Wang
- School of Pharmaceutical Sciences, Liaocheng University, Liaocheng, China
| | - Tong Meng
- School of Pharmaceutical Sciences, Liaocheng University, Liaocheng, China
| | - Hui Yan
- School of Pharmaceutical Sciences, Liaocheng University, Liaocheng, China
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16
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Conformational Investigation of the Encapsulation of Nicotinic Acid Into β‐Cyclodextrin. ChemistrySelect 2021. [DOI: 10.1002/slct.202100197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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17
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Decherchi S, Cavalli A. Thermodynamics and Kinetics of Drug-Target Binding by Molecular Simulation. Chem Rev 2020; 120:12788-12833. [PMID: 33006893 PMCID: PMC8011912 DOI: 10.1021/acs.chemrev.0c00534] [Citation(s) in RCA: 122] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Indexed: 12/19/2022]
Abstract
Computational studies play an increasingly important role in chemistry and biophysics, mainly thanks to improvements in hardware and algorithms. In drug discovery and development, computational studies can reduce the costs and risks of bringing a new medicine to market. Computational simulations are mainly used to optimize promising new compounds by estimating their binding affinity to proteins. This is challenging due to the complexity of the simulated system. To assess the present and future value of simulation for drug discovery, we review key applications of advanced methods for sampling complex free-energy landscapes at near nonergodicity conditions and for estimating the rate coefficients of very slow processes of pharmacological interest. We outline the statistical mechanics and computational background behind this research, including methods such as steered molecular dynamics and metadynamics. We review recent applications to pharmacology and drug discovery and discuss possible guidelines for the practitioner. Recent trends in machine learning are also briefly discussed. Thanks to the rapid development of methods for characterizing and quantifying rare events, simulation's role in drug discovery is likely to expand, making it a valuable complement to experimental and clinical approaches.
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Affiliation(s)
- Sergio Decherchi
- Computational
and Chemical Biology, Fondazione Istituto
Italiano di Tecnologia, 16163 Genoa, Italy
| | - Andrea Cavalli
- Computational
and Chemical Biology, Fondazione Istituto
Italiano di Tecnologia, 16163 Genoa, Italy
- Department
of Pharmacy and Biotechnology, University
of Bologna, 40126 Bologna, Italy
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18
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Zhao L, Sun Q, Pu H, Tang P, Liu Y, Li M, Ren X, Li H. Experimental and computer simulation investigations of ethyl red with modified β-cyclodextrins: Inclusion mechanism and structure characterization. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137725] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Li Z, Wen W, Chen X, Zhu L, Cheng G, Liao Z, Huang H, Ming L. Release Characteristics of an Essential Oil Component Encapsulated with Cyclodextrin Shell Matrices. Curr Drug Deliv 2020; 18:487-499. [PMID: 32735520 DOI: 10.2174/1567201817666200731164902] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 06/01/2020] [Accepted: 07/08/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Essential oils are poor aqueous solubility and high volatility compounds. The encapsulation of essential oils with Cyclodextrins (CDs) can protect them from adverse environmental conditions and improve their stability. Therefore, increasing the functional capabilities of essential oils when they were used as additives in pharmaceutical and food systems. Additionally, the release of active compounds is an important issue. However, there were few studies about the effect of different CDs on the release of drugs after encapsulation. Therefore, the information on the study of release models is considerably limited. OBJECTIVE This study aimed to (i) characterize the physico-chemical properties and release behavior of myrcene encapsulated in the four different shell matrices of α-CD, β-CD, γ-CD and 2-hydroxypropyl-β- cyclodextrin (HP-β-CD), which were selected from the perspective of stability, and (ii) determine the release mechanism of myrcene in Inclusion Complexes (ICs). METHODS ICs of myrcene and four CDs were prepared by freeze-drying. The physico-chemical properties of ICs were fully characterized by laser diffraction particle size analyzer, Scanning Electron Microscope (SEM), Fourier-Transform Infrared spectroscopy (FT-IR) and Differential Scanning Calorimeter (DSC). The release behaviors of ICs at 50, 60, 70 and 80 °C were determined and described by zeroorder or first-order kinetics with the Henderson-Pabis, Peppas, Avrami and Page mathematical models. Moreover, the possible binding modes of ICs were identified with molecular modelling technique. RESULTS Firstly, the structure of Particle Size Distribution (PSD), FT-IR, DSC and SEM showed that (i) CDs could effectively encapsulate the myrcene molecules, and (ii) the release kinetics were well simulated by Avrami and Page models. Secondly, the release rates of the ICs experienced an unsteady state in the early stage, and gradually became almost constants period after 20 hours. Except that the release of myrcene in γ-CD/myrcene belonged to the first-order kinetic, the release models of the remaining three ICs belonged to diffusion mode. Thirdly, the calculated binding energies of the optimized structures for α-CD/myrcene, β-CD/myrcene, γ-CD/myrcene, and HP-β-CD/myrcene ICs were -4.28, -3.82, -4.04, and -3.72 kcal/mol, respectively. Finally, the encapsulation of myrcene with α-CD and β-CD was preferable according to the stability and release characteristics. CONCLUSION The encapsulation of myrcene was profoundly affected by the type of CDs, and the stability could be improved by complexation with suitable CDs. The binding behavior between guest and CD molecules, and the release profile of the guest molecules could be effectively explained by the kinetics parameters and molecular modelling. This study can provide an effective basis and guide for screening suitable shell matrices.
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Affiliation(s)
- Zhe Li
- Research Center for Differentiation and Development of TCM Basic Theory, Jiangxi University of Traditional Chinese Medicine, Jiangxi Nanchang 330004, China
| | - Wangwen Wen
- National Engineering Research Center for Modernization of Traditional Chinese Medicine - Hakka Medical Resources Branch, College of Pharmacy, Gannan Medical University, Jiangxi Ganzhou, 341000, China
| | - Xulong Chen
- Key Laboratory of Preparation of Modern TCM, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Jiangxi Nanchang 330004, China
| | - Lin Zhu
- Key Laboratory of Preparation of Modern TCM, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Jiangxi Nanchang 330004, China
| | - Genjinsheng Cheng
- National Engineering Research Center for Modernization of Traditional Chinese Medicine - Hakka Medical Resources Branch, College of Pharmacy, Gannan Medical University, Jiangxi Ganzhou, 341000, China
| | - Zhenggen Liao
- Key Laboratory of Preparation of Modern TCM, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Jiangxi Nanchang 330004, China
| | - Hao Huang
- National Engineering Research Center for Modernization of Traditional Chinese Medicine - Hakka Medical Resources Branch, College of Pharmacy, Gannan Medical University, Jiangxi Ganzhou, 341000, China
| | - Liangshan Ming
- Research Center for Differentiation and Development of TCM Basic Theory, Jiangxi University of Traditional Chinese Medicine, Jiangxi Nanchang 330004, China
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20
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F. Garrido P, Calvelo M, Garcia-Fandiño R, Piñeiro Á. Rings, Hexagons, Hetals, and Dipolar Moment Sink-Sources: The Fanciful Behavior of Water around Cyclodextrin Complexes. Biomolecules 2020; 10:E431. [PMID: 32164358 PMCID: PMC7175221 DOI: 10.3390/biom10030431] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 02/24/2020] [Accepted: 03/04/2020] [Indexed: 01/08/2023] Open
Abstract
The basket-like geometry of cyclodextrins (CDs), with a cavity able to host hydrophobic groups, makes these molecules well suited for a large number of fundamental and industrial applications. Most of the established CD-based applications rely on trial and error studies, often ignoring key information at the atomic level that could be employed to design new products and to optimize their use. Computational simulations are well suited to fill this gap, especially in the case of CD systems due to their low number of degrees of freedom compared with typical macromolecular systems. Thus, the design and validation of solid and efficient methods to simulate and analyze CD-based systems is key to contribute to this field. The behavior of supramolecular complexes critically depends on the media where they are embedded, so the detailed characterization of the solvent is required to fully understand these systems. In the present work, we use the inclusion complex formed by two α-CDs and one sodium dodecyl sulfate molecule to test eight different parameterizations of the GROMOS and AMBER force fields, including several methods aimed to increase the conformational sampling in computational molecular dynamics simulation trajectories. The system proved to be extremely sensitive to the employed force field, as well as to the presence of a water/air interface. In agreement with previous experiments and in contrast to the results obtained with AMBER, the analysis of the simulations using GROMOS showed a quick adsorption of the complex to the interface as well as an extremely exotic behavior of the water molecules surrounding the structure both in the bulk aqueous solution and at the water surface. The chirality of the CD molecule seems to play an important role in this behavior. All together, these results are expected to be useful to better understand the behavior of CD-based supramolecular complexes such as adsorption or aggregation driving forces, as well as to introduce new methods able to speed up general MD simulations.
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Affiliation(s)
- Pablo F. Garrido
- Departamento de Física de Aplicada, Facultade de Física, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain;
| | - Martín Calvelo
- Departamento de Química Orgánica, Center for Research in Biological Chemistry and Molecular Materials, Universidade de Santiago de Compostela, Campus Vida s/n, E-15782 Santiago de Compostela, Spain;
| | - Rebeca Garcia-Fandiño
- Departamento de Química Orgánica, Center for Research in Biological Chemistry and Molecular Materials, Universidade de Santiago de Compostela, Campus Vida s/n, E-15782 Santiago de Compostela, Spain;
| | - Ángel Piñeiro
- Departamento de Física de Aplicada, Facultade de Física, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain;
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21
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A theoretical study on the molecular encapsulation of luteolin and pinocembrin with various derivatized beta-cyclodextrins. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.12.025] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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22
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Kerdpol K, Kicuntod J, Wolschann P, Mori S, Rungnim C, Kunaseth M, Okumura H, Kungwan N, Rungrotmongkol T. Cavity Closure of 2-Hydroxypropyl-β-Cyclodextrin: Replica Exchange Molecular Dynamics Simulations. Polymers (Basel) 2019; 11:polym11010145. [PMID: 30960130 PMCID: PMC6401915 DOI: 10.3390/polym11010145] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 01/09/2019] [Accepted: 01/11/2019] [Indexed: 12/15/2022] Open
Abstract
2-Hydroxypropyl-β-cyclodextrin (HPβCD) has unique properties to enhance the stability and the solubility of low water-soluble compounds by inclusion complexation. An understanding of the structural properties of HPβCD and its derivatives, based on the number of 2-hydroxypropyl (HP) substituents at the α-d-glucopyranose subunits is rather important. In this work, replica exchange molecular dynamics simulations were performed to investigate the conformational changes of single- and double-sided HP-substitution, called 6-HPβCDs and 2,6-HPβCDs, respectively. The results show that the glucose subunits in both 6-HPβCDs and 2,6-HPβCDs have a lower chance of flipping than in βCD. Also, HP groups occasionally block the hydrophobic cavity of HPβCDs, thus hindering drug inclusion. We found that HPβCDs with a high number of HP-substitutions are more likely to be blocked, while HPβCDs with double-sided HP-substitutions have an even higher probability of being blocked. Overall, 6-HPβCDs with three and four HP-substitutions are highlighted as the most suitable structures for guest encapsulation, based on our conformational analyses, such as structural distortion, the radius of gyration, circularity, and cavity self-closure of the HPβCDs.
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Affiliation(s)
- Khanittha Kerdpol
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.
| | - Jintawee Kicuntod
- Structural and Computational Biology Research Unit, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.
| | - Peter Wolschann
- Structural and Computational Biology Research Unit, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.
- Department of Pharmaceutical Chemistry, University of Vienna, Vienna 1090, Austria.
- Institute of Theoretical Chemistry, University of Vienna, Vienna 1090, Austria.
| | - Seiji Mori
- Institute of Quantum Beam Science, Graduate School of Science and Engineering, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan.
| | - Chompoonut Rungnim
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand.
| | - Manaschai Kunaseth
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand.
| | - Hisashi Okumura
- Research Center for Computational Science, Institute for Molecular Science, Okazaki, Aichi 444-8585, Japan.
| | - Nawee Kungwan
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.
- Center of Excellence in Materials Science and Technology, Chiang Mai University, Chiang Mai 50200, Thailand.
| | - Thanyada Rungrotmongkol
- Structural and Computational Biology Research Unit, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.
- Ph.D. Program in Bioinformatics and Computational Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.
- Molecular Sensory Science Center, Faculty of Science, Chulalongkorn University, 254 Phayathai Road, Patumwan, Bangkok 10330, Thailand.
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23
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Chen Y, Zuo Z, Dai X, Xiao P, Fang X, Wang X, Wang W, Ding CF. Gas-phase complexation of α-/β-cyclodextrin with amino acids studied by ion mobility-mass spectrometry and molecular dynamics simulations. Talanta 2018; 186:1-7. [DOI: 10.1016/j.talanta.2018.04.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 03/28/2018] [Accepted: 04/01/2018] [Indexed: 01/11/2023]
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