1
|
Wang G. Ligand-stereoselective allosteric activation of cold-sensing TRPM8 channels by an H-bonded homochiral menthol dimer with head-to-head or head-to-tail. Chirality 2021; 33:783-796. [PMID: 34596287 DOI: 10.1002/chir.23364] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 09/01/2021] [Accepted: 09/02/2021] [Indexed: 11/07/2022]
Abstract
Both menthol and its analog WS-12 share the same hydrophobic intra-subunit binding pocket between a voltage-sensor-like domain and a TRP domain in a cold-sensing TRPM8 channel. However, unlike WS-12, menthol upregulates TRPM8 with a low efficacy but a high coefficient of a dose response at membrane hyperpolarization and with ligand stereoselectivity at membrane depolarization. The underlying mechanisms are unknown. Here, this in silico research suggested that the ligand-stereoselective sequential cooperativity between two menthol molecules in the WS-12 pocket is required for allosteric activation of TRPM8. Furthermore, two H-bonded homochiral menthol dimers with both head-to-head and head-to-tail can compete for the WS-12 site via non-covalent interactions. Although both dimers can form an H-bonding network with a voltage sensor S4 to disrupt a S3-S4 salt bridge in the voltage-sensor-like domain to release a "parking brake," only one dimer may drive channel opening by pushing a "gas pedal" in the TRP domain away from the S6 gate against S4. In this way, the efficacy is decreased, but the cooperativity is increased for the menthol effect at membrane hyperpolarization. Therefore, this review may extend a new pathway for ligand-stereoselective allosteric regulation of other voltage- and ligand-gated ion channels by menthol.
Collapse
Affiliation(s)
- Guangyu Wang
- Department of Drug Research and Development, Institute of Biophysical Medico-chemistry, Reno, NV, USA
| |
Collapse
|
2
|
Ali MA, Rahman MS, Roy R, Gambill P, Raynie DE, Halim MA. Structure Elucidation of Menthol-Based Deep Eutectic Solvent using Experimental and Computational Techniques. J Phys Chem A 2021; 125:2402-2412. [PMID: 33754725 DOI: 10.1021/acs.jpca.0c10735] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The structural properties and nonbonding interactions of a menthol-based deep eutectic solvent (DES) were investigated in detail employing experimental and computational methods. A mass spectrometry analysis confirmed the formation of 1:1 l-menthol/acetic acid. A molecular dynamics simulation was used to figure out energetically most favorable cluster conformers of the 1:1 l-menthol/acetic acid system. Density functional theory at the ωB97XD/6-311G (d,p) level of theory was employed to optimize the isolated structures and to calculate their thermochemical properties. Both experimental and computed IR spectra were analyzed for the samples. Additionally, vibrational circular dichroism (VCD) spectra of the samples were measured to prove the chirality transfer. Principal component analysis (PCA) was used to make the data interpretation more vivid. All the spectral data analyses and nanostructure elucidation proved the spontaneous formation of the DES through the formation of strong hydrogen bonding. Experimental solvatochromism and computed highest occupied molecular orbital-lowest unoccupied molecular orbital gaps validated the reasoning. Moreover, comparative VCD and IR spectral analyses clearly indicated a chirality transfer from the chiral menthol to achiral acetic acid. This study suggests that various techniques, such as mass spectrometry, IR, solvatochromism, and computed IR-VCD could be useful and important tools to elucidate nanostructure and nonbonding interactions of a DES. VCD could be used as an excellent complementary technique to IR spectroscopy for a chiral molecule-based DESs.
Collapse
Affiliation(s)
- Md Ackas Ali
- Division of Quantum Chemistry, The Red-Green Research Center, BICCB, 16, Tejkunipara, Tejgaon, Dhaka 1215, Bangladesh.,Department of Chemistry, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh
| | - Md Sajjadur Rahman
- Department of Chemistry and Biochemistry, South Dakota State University, Brookings 57007, South Dakota, United States
| | - Ranen Roy
- Department of Chemistry and Biochemistry, South Dakota State University, Brookings 57007, South Dakota, United States
| | - Paul Gambill
- Department of Physical Sciences, University of Arkansas-Fort Smith, Fort Smith 72913-3649, Arkansas, United States
| | - Douglas E Raynie
- Department of Chemistry and Biochemistry, South Dakota State University, Brookings 57007, South Dakota, United States
| | - Mohammad A Halim
- Department of Physical Sciences, University of Arkansas-Fort Smith, Fort Smith 72913-3649, Arkansas, United States
| |
Collapse
|
3
|
Sakai T, Akagi Y, Suzuki H, Irie M, Nakamura T, Sato H, Kawamura I. Structural Characterization of a Cyclodextrin/l-menthol Inclusion Complex in the Solid-state by Solid-state NMR and Vibrational Circular Dichroism. ANAL SCI 2020; 36:1337-1343. [PMID: 32565526 DOI: 10.2116/analsci.20p120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Hydrophobic and volatile flavor molecules can be encapsulated inside cyclodextrins (CyDs). Inclusion complexes are frequently used in solid or dispersed states in preserved food and cosmetics. In this study, the solid-state structures of spray-dried inclusion complexes of l-menthol in α-CyD and β-CyD were analyzed using 13C solid-state NMR and vibrational circular dichroism (VCD). The NMR signals of l-menthol and CyDs were identified in the physical mixture and the l-menthol inclusion complex of α- and β-CyD. The NMR signal of the isopropyl-methyl group of menthol in the α-CyD inclusion complex exhibited a large low-field shift, which suggested a steric hindrance between menthol and α-CyD. VCD exhibited specific changes in the intensity of bands corresponding to C-C vibrations in α-CyD and O-C stretching vibrations in l-menthol. Our results indicated that l-menthol specifically fitted the narrow space within α-CyD. The combined solid-state NMR and VCD analysis provided structural insights into the flavor inclusion complex in the solid-state.
Collapse
Affiliation(s)
| | | | | | - Mitsuki Irie
- Graduate School of Engineering Science, Yokohama National University
| | | | - Hisako Sato
- Graduate School of Science and Engineering, Ehime University
| | - Izuru Kawamura
- Graduate School of Engineering Science, Yokohama National University
| |
Collapse
|
4
|
Mazzeo G, Santoro E, Abbate S, Zonta C, Fabris F, Longhi G. Testing the vibrational exciton and the local mode models on the instructive cases of dicarvone, dipinocarvone, and dimenthol vibrational circular dichroism spectra. Chirality 2020; 32:907-921. [DOI: 10.1002/chir.23232] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 03/11/2020] [Accepted: 04/06/2020] [Indexed: 01/30/2023]
Affiliation(s)
- Giuseppe Mazzeo
- Dipartimento di Medicina Molecolare e TraslazionaleUniversità di Brescia Brescia Italy
| | - Ernesto Santoro
- Dipartimento di Medicina Molecolare e TraslazionaleUniversità di Brescia Brescia Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e TraslazionaleUniversità di Brescia Brescia Italy
- Research Unit of BresciaIstituto Nazionale di Ottica (INO), CNR Brescia Italy
| | - Cristiano Zonta
- Dipartimento di Scienze ChimicheUniversità degli Studi di Padova Padova Italy
| | - Fabrizio Fabris
- Dipartimento di Scienze Molecolari e NanosistemiUniversità Ca' Foscari Venezia Mestre Italy
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e TraslazionaleUniversità di Brescia Brescia Italy
- Research Unit of BresciaIstituto Nazionale di Ottica (INO), CNR Brescia Italy
| |
Collapse
|
5
|
Weirich L, Blanke K, Merten C. More complex, less complicated? Explicit solvation of hydroxyl groups for the analysis of VCD spectra. Phys Chem Chem Phys 2020; 22:12515-12523. [DOI: 10.1039/d0cp01656j] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
With increasing size of the molecules, hydrogen bonding induced solvent effects on the IR and VCD spectra become more negligible.
Collapse
Affiliation(s)
- Luisa Weirich
- Ruhr-Universität Bochum
- Fakultät für Chemie und Biochemie
- Organische Chemie II
- 44801 Bochum
- Germany
| | - Katharina Blanke
- Ruhr-Universität Bochum
- Fakultät für Chemie und Biochemie
- Organische Chemie II
- 44801 Bochum
- Germany
| | - Christian Merten
- Ruhr-Universität Bochum
- Fakultät für Chemie und Biochemie
- Organische Chemie II
- 44801 Bochum
- Germany
| |
Collapse
|
6
|
Štejfa V, Bazyleva A, Fulem M, Rohlíček J, Skořepová E, Růžička K, Blokhin AV. Polymorphism and thermophysical properties of L- and DL-menthol. THE JOURNAL OF CHEMICAL THERMODYNAMICS 2019; 131:10.1016/j.jct.2018.11.004. [PMID: 32165766 PMCID: PMC7067000 DOI: 10.1016/j.jct.2018.11.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The thermodynamic properties, phase behavior, and kinetics of polymorphic transformations of racemic (DL-) and enantiopure (L-) menthol were studied using a combination of advanced experimental techniques, including static vapor pressure measurements, adiabatic calorimetry, Tian-Calvet calorimetry, differential scanning calorimetry (DSC), and variable-temperature X-ray powder diffraction. Several concomitant polymorphs (α, β, γ, and δ forms) were observed and studied. A continuous transformation to the stable α form was detected by DSC and monitored in detail using X-ray powder diffraction. A long-term coexistence of the stable crystalline form with the liquid phase was observed. The vapor pressure measurements of both compounds were performed using two static apparatus over a temperature range from 274 K to 363 K. Condensed-phase heat capacities were measured by adiabatic and Tian-Calvet calorimetry in the wide temperature interval from 5 K to 368 K. Experimental data of L- and DL-menthol are compared mutually as well as with available literature results. The thermodynamic functions of crystalline and liquid L-menthol between 0 K and 370 K were calculated from the calorimetric results. The thermodynamic properties in the ideal-gas state were obtained by combining statistical thermodynamics and quantum chemical calculations based on a thorough conformational analysis. Calculated ideal-gas heat capacities and experimental data on vapor pressure and condensed-phase heat capacity were treated simultaneously to obtain a consistent thermodynamic description. Based on the obtained results, the phase diagrams of L-menthol and DL-menthol were suggested.
Collapse
Affiliation(s)
- Vojtěch Štejfa
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, CZ-166 28 Prague 6, Czech Republic
| | - Ala Bazyleva
- Applied Chemicals and Materials Division, National Institute of Standards and Technology, Boulder, CO 80305-3337, USA
| | - Michal Fulem
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, CZ-166 28 Prague 6, Czech Republic
| | - Jan Rohlíček
- Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, 182 21 Praha 8, Czech Republic
| | - Eliška Skořepová
- Department of Chemical Engineering, University of Chemistry and Technology Prague, Technická 3, 16628, Prague 6, Czech Republic
| | - Květoslav Růžička
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, CZ-166 28 Prague 6, Czech Republic
| | - Andrey V. Blokhin
- Chemistry Faculty, Belarusian State University, Leningradskaya 14, 220030 Minsk, Belarus
| |
Collapse
|
7
|
Reinscheid F, Reinscheid U. Stereochemical analysis of menthol and menthylamine isomers using calculated and experimental optical rotation data. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2015.09.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
8
|
Schmitz D, Shubert VA, Betz T, Schnell M. Exploring the conformational landscape of menthol, menthone, and isomenthone: a microwave study. Front Chem 2015; 3:15. [PMID: 25815287 PMCID: PMC4355985 DOI: 10.3389/fchem.2015.00015] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Accepted: 02/17/2015] [Indexed: 01/11/2023] Open
Abstract
The rotational spectra of the monoterpenoids menthol, menthone, and isomenthone are reported in the frequency range of 2–8.5 GHz, obtained with broadband Fourier-transform microwave spectroscopy. For menthol only one conformation was identified under the cold conditions of the molecular jet, whereas three conformations were observed for menthone and one for isomenthone. The conformational space of the different molecules was extensively studied using quantum chemical calculations, and the results were compared with molecular parameters obtained by the measurements. Finally, a computer program is presented, which automatically identifies different species in a dense broadband microwave spectrum using calculated ab initio rotational constants as initial input parameters.
Collapse
Affiliation(s)
- David Schmitz
- Max Planck Institute for the Structure and Dynamics of Matter Hamburg, Germany ; The Center for Free-Electron Laser Science Hamburg, Germany
| | - V Alvin Shubert
- Max Planck Institute for the Structure and Dynamics of Matter Hamburg, Germany ; The Center for Free-Electron Laser Science Hamburg, Germany
| | - Thomas Betz
- Max Planck Institute for the Structure and Dynamics of Matter Hamburg, Germany ; The Center for Free-Electron Laser Science Hamburg, Germany
| | - Melanie Schnell
- Max Planck Institute for the Structure and Dynamics of Matter Hamburg, Germany ; The Center for Free-Electron Laser Science Hamburg, Germany ; The Hamburg Centre for Ultrafast Imaging, Universität Hamburg Hamburg, Germany
| |
Collapse
|
9
|
Lomas JS. 1H NMR spectra of alcohols and diols in chloroform: DFT/GIAO calculation of chemical shifts. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2014; 52:745-754. [PMID: 25199903 DOI: 10.1002/mrc.4130] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Revised: 07/10/2014] [Accepted: 07/29/2014] [Indexed: 06/03/2023]
Abstract
Proton nuclear magnetic resonance (NMR) shifts of aliphatic alcohols in chloroform have been computed on the basis of density functional theory, the solvent being included by the integral-equation-formalism polarisable continuum model of Gaussian 09. Relative energies of all conformers are calculated at the Perdew, Burke and Ernzerhof (PBE)0/6-311+G(d,p) level, and NMR shifts by the gauge-including atomic orbital method with the PBE0/6-311+G(d,p) geometry and the cc-pVTZ basis set. The 208 computed CH proton NMR shifts for 34 alcohols correlate very well with the experimental values, with a gradient of 1.00 ± 0.01 and intercept close to zero; the overall root mean square difference (RMSD) is 0.08 ppm. Shifts for CH protons of diols in chloroform are well correlated with the theoretical values for (isotropic) benzene, with similar gradient and intercept (1.02 ± 0.01, -0.13 ppm), but the overall RMSD is slightly higher, 0.12 ppm. This approach generally gives slightly better results than the CHARGE model of Abraham et al. The shifts of unsaturated alcohols in benzene have been re-examined with Gaussian 09, but the overall fit for CH protons is not improved, and OH proton shifts are worse. Shifts of vinyl protons in alkenols are systematically overestimated, and the correlation of computed shifts against the experimental data for unsaturated alcohols follows a quadratic equation. Splitting the 20 compounds studied into two sets, and applying empirical scaling based on the quadratic for the first set to the second set, gives an RMSD of 0.10 ppm. A multi-standard approach gives a similar result.
Collapse
Affiliation(s)
- John S Lomas
- Univ Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR 7086, F-75205, Paris, France
| |
Collapse
|
10
|
Ponikvar-Svet M, Zeiger DN, Keating LR, Liebman JF. Interplay of thermochemistry and structural chemistry, the journal (volume 24, 2013, issues 1–2) and the discipline. Struct Chem 2013. [DOI: 10.1007/s11224-013-0358-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|