1
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Brusas JR, Dela Pena EMB. Hygroscopicity of 1:2 Choline Chloride:Ethylene Glycol Deep Eutectic Solvent: A Hindrance to its Electroplating Industry Adoption. J ELECTROCHEM SCI TE 2021. [DOI: 10.33961/jecst.2020.01522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Deep eutectic solvents have been established as feasible metal electroplating solvent alternatives over traditional toxic aqueous plating baths. However, water, either added intentionally or unintentionally, can significantly influence the solvent’s physical properties and performance, thereby hindering its industry application. In this study, the hygroscopicity, or the ability to absorb moisture from the environment, of synthesized ethaline (1:2 choline chloride:ethylene glycol) was investigated. The kinematic viscosity, electrical conductivity, electrochemical window, and water content of ethaline were monitored over a 2-week period. Karl Fischer titration tests showed that ethaline exposed to the atmosphere displayed significant hygroscopicity compared to its unexposed counterpart. 1H NMR spectroscopy revealed that water vapor was readily absorbed at the surface due to the hydrophilic groups present in the ethaline molecule. Water uptake resulted in the decrease in viscosity, increase in electrical conductivity and narrowing of the electrochemical window of ethaline. Solution heating at 100°C removed the absorbed moisture and allowed the recovery of the solvent’s initial properties.
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2
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Fabrication of soft-etched nanoporous polyimide membranes for ionic conduction and discrimination. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2020.118633] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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3
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Yeom J, Guimaraes PPG, Ahn HM, Jung B, Hu Q, McHugh K, Mitchell MJ, Yun CO, Langer R, Jaklenec A. Chiral Supraparticles for Controllable Nanomedicine. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1903878. [PMID: 31686433 PMCID: PMC6986383 DOI: 10.1002/adma.201903878] [Citation(s) in RCA: 91] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 09/16/2019] [Indexed: 05/19/2023]
Abstract
Chirality is ubiquitous in nature and hard-wired into every biological system. Despite the prevalence of chirality in biological systems, controlling biomaterial chirality to influence interactions with cells has only recently been explored. Chiral-engineered supraparticles (SPs) that interact differentially with cells and proteins depending on their handedness are presented. SPs coordinated with d-chirality demonstrate greater than threefold enhanced cell membrane penetration in breast, cervical, and multiple myeloma cancer cells. Quartz crystal microbalance with dissipation and isothermal titration calorimetry measurements reveal the mechanism of these chiral-specific interactions. Thermodynamically, d-SPs show more stable adhesion to lipid layers composed of phospholipids and cholesterol compared to l-SPs. In vivo, d-SPs exhibit superior stability and longer biological half-lives likely due to opposite chirality and thus protection from endogenous proteins including proteases. This work shows that incorporating d-chirality into nanosystems enhances uptake by cancer cells and prolonged in vivo stability in circulation, providing support for the importance of chirality in biomaterials. Thus, chiral nanosystems may have the potential to provide a new level of control for drug delivery systems, tumor detection markers, biosensors, and other biomaterial-based devices.
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Affiliation(s)
- Jihyeon Yeom
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139
| | - Pedro P. G. Guimaraes
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139
- Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Hyo Min Ahn
- Department of Bioengineering, Hanyang University, Seoul, Republic of Korea
| | - BoKyeong Jung
- Department of Bioengineering, Hanyang University, Seoul, Republic of Korea
| | - Quanyin Hu
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139
| | - Kevin McHugh
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139
| | - Michael J. Mitchell
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, United States
| | - Chae-Ok Yun
- Department of Bioengineering, Hanyang University, Seoul, Republic of Korea
| | - Robert Langer
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139
| | - Ana Jaklenec
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139
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4
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Su Z, Ravindhran G, Dias CL. Effects of Trimethylamine-N-oxide (TMAO) on Hydrophobic and Charged Interactions. J Phys Chem B 2018; 122:5557-5566. [DOI: 10.1021/acs.jpcb.7b11847] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Zhaoqian Su
- Department of Physics, New Jersey Institute of Technology, University Heights Newark, New Jersey 07102-1982, United States
| | - Gopal Ravindhran
- Department of Physics, New Jersey Institute of Technology, University Heights Newark, New Jersey 07102-1982, United States
| | - Cristiano L. Dias
- Department of Physics, New Jersey Institute of Technology, University Heights Newark, New Jersey 07102-1982, United States
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5
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Yonenaga K, Morita T, Nishikawa K, Koga Y. Effects of ionic liquid constituent cations, tetraalkylammoniums, on water studied by means of the “1-propanol probing methodology”. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2017.12.130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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6
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Tetraalkylammonium Cations Conduction through a Single Nanofluidic Diode: Experimental and Theoretical Studies. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.08.078] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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7
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Su Z, Mahmoudinobar F, Dias CL. Effects of Trimethylamine-N-oxide on the Conformation of Peptides and its Implications for Proteins. PHYSICAL REVIEW LETTERS 2017; 119:108102. [PMID: 28949191 DOI: 10.1103/physrevlett.119.108102] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Indexed: 05/16/2023]
Abstract
To provide insights into the stabilizing mechanisms of trimethylamine-N-oxide (TMAO) on protein structures, we perform all-atom molecular dynamics simulations of peptides and the Trp-cage miniprotein. The effects of TMAO on the backbone and charged residues of peptides are found to stabilize compact conformations, whereas effects of TMAO on nonpolar residues lead to peptide swelling. This suggests competing mechanisms of TMAO on proteins, which accounts for hydrophobic swelling, backbone collapse, and stabilization of charge-charge interactions. These mechanisms are observed in Trp cage.
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Affiliation(s)
- Zhaoqian Su
- Physics Department, New Jersey Institute of Technology, Newark, 07102-1982 New Jersey, USA
| | - Farbod Mahmoudinobar
- Physics Department, New Jersey Institute of Technology, Newark, 07102-1982 New Jersey, USA
| | - Cristiano L Dias
- Physics Department, New Jersey Institute of Technology, Newark, 07102-1982 New Jersey, USA
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8
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Troncoso J, Zemánková K, Jover A. Dynamic light scattering study of aggregation in aqueous solutions of five amphiphiles. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.06.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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9
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Rani A, Taha M, Venkatesu P, Lee MJ. Coherent Experimental and Simulation Approach To Explore the Underlying Mechanism of Denaturation of Stem Bromelain in Osmolytes. J Phys Chem B 2017; 121:6456-6470. [DOI: 10.1021/acs.jpcb.7b01776] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anjeeta Rani
- Department
of Chemistry, University of Delhi, Delhi 110 007, India
| | - Mohamed Taha
- Department
of Chemistry, College of Science, Sultan Qaboos University, PO Box 36, PC 123 Muscat, Oman
| | | | - Ming- Jer Lee
- Department of Chemical Engineering, National Taiwan University of Science & Technology, Taipei 10607, Taiwan
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10
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Hong J, Xiong S. TMAO-Protein Preferential Interaction Profile Determines TMAO's Conditional In Vivo Compatibility. Biophys J 2017; 111:1866-1875. [PMID: 27806268 DOI: 10.1016/j.bpj.2016.09.035] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 09/16/2016] [Accepted: 09/26/2016] [Indexed: 10/20/2022] Open
Abstract
Trimethylamine N-oxide (TMAO) exemplifies how Nature uses the solute effect as a simple chemical strategy to cope with hydrodynamic pressure or urea stress to maintain proteostasis. It is a gut-microbe-generated metabolite that strongly promotes the development of atherosclerosis. It remains unclear how TMAO exerts its effects. In this study, we experimentally characterized the profile of the preferential interaction potential of TMAO with proteins, a thermodynamic key to understanding the effects of TMAO on protein processes and the distinction of TMAO among osmolytes. TMAO is thus found to be highly preferentially excluded from most types of protein surface, which explains why TMAO is a strong globular protein stabilizer and identifies the dominant stabilizing factor as the unfavorable interaction of TMAO with the hydrophobic surface exposed upon unfolding. We dissected the mechanism of the counteracting effects of TMAO and urea: the contrary feature of the interaction profiles of the two solutes maximizes the possibility for them to offset each other's perturbing effect on protein processes. The interaction profile also predicts that TMAO promotes aggregation of amyloidogenic intrinsically disordered peptide, as demonstrated here in Aβ42, and that TMAO has a strong potential to impact protein processes in the absence of stressors. Our data suggest that although TMAO is an evolutionally selected chemical chaperone for some organisms or organs, its compatibility in vivo is conditional and determined by its interaction profile with biopolymers and the nature of the essential biopolymer processes. Our thermodynamic framework plus the TMAO-protein interaction profile provides a basis for exploring the broad biological significance of TMAO, including its pathological impact in the absence of stressors. We argue for the general importance of controlling in vivo background solutes and the pathological significance of a control failure.
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Affiliation(s)
- Jiang Hong
- School of Life Sciences, Shanghai University, Shanghai, China; Experimental Center for Life Sciences, School of Life Sciences, Shanghai University, Shanghai, China.
| | - Shangqin Xiong
- School of Life Sciences, Shanghai University, Shanghai, China
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11
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Marcellini M, Fernandes FM, Dedovets D, Deville S. Water/ice phase transition: The role of zirconium acetate, a compound with ice-shaping properties. J Chem Phys 2017; 146:144504. [PMID: 28411615 DOI: 10.1063/1.4979845] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Few compounds feature ice-shaping properties. Zirconium acetate is one of the very few inorganic compounds reported so far to have ice-shaping properties similar to that of ice-shaping proteins, encountered in many organisms living at low temperature. When a zirconium acetate solution is frozen, oriented and perfectly hexagonal ice crystals can be formed and their growth follows the temperature gradient. To shed light on the water/ice phase transition while freezing zirconium acetate solution, we carried out differential scanning calorimetry measurements. From our results, we estimate how many water molecules do not freeze because of their interaction with Zr cations. We estimate the colligative properties of the Zr acetate on the apparent critical temperature. We further show that the phase transition is unaffected by the nature of the base which is used to adjust the pH. Our results provide thus new hints on the ice-shaping mechanism of zirconium acetate.
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Affiliation(s)
- Moreno Marcellini
- Ceramic Synthesis and Functionalization Lab, UMR3080 CNRS/Saint-Gobain, 84306 Cavaillon, France
| | - Francisco M Fernandes
- Laboratoire de Chimie de la Matière Condensée de Paris, Université Pierre et Marie Curie, Sorbonne Universités, UMR7574, 4 Place Jussieu, 75005 Paris, France
| | - Dmytro Dedovets
- Ceramic Synthesis and Functionalization Lab, UMR3080 CNRS/Saint-Gobain, 84306 Cavaillon, France
| | - Sylvain Deville
- Ceramic Synthesis and Functionalization Lab, UMR3080 CNRS/Saint-Gobain, 84306 Cavaillon, France
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12
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Ohto T, Hunger J, Backus EHG, Mizukami W, Bonn M, Nagata Y. Trimethylamine-N-oxide: its hydration structure, surface activity, and biological function, viewed by vibrational spectroscopy and molecular dynamics simulations. Phys Chem Chem Phys 2017; 19:6909-6920. [DOI: 10.1039/c6cp07284d] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Vibrational spectroscopy and molecular simulations revealed the hydrophilicity and hydrophobicity of TMAO in aqueous solution.
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Affiliation(s)
- Tatsuhiko Ohto
- Graduate School of Engineering Science
- Osaka University
- Toyonaka
- Japan
| | | | | | - Wataru Mizukami
- Department of Energy and Material Sciences
- Faculty of Engineering Sciences
- Kyushu University
- Fukuoka
- Japan
| | - Mischa Bonn
- Max Planck Institute for Polymer Research
- 55128 Mainz
- Germany
| | - Yuki Nagata
- Max Planck Institute for Polymer Research
- 55128 Mainz
- Germany
- Department of Theoretical and Computational Molecular Science
- Institute for Molecular Science
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13
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Ohgi H, Imamura H, Yonenaga K, Morita T, Nishikawa K, Westh P, Koga Y. The effect of 2,2,2-trifluoroethanol on water studied by using third derivatives of Gibbs energy, G. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.09.101] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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14
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Zemánková K, Troncoso J, Cerdeiriña CA, Romaní L, Anisimov MA. Hydrophobicity and thermodynamic response for aqueous solutions of amphiphiles. Chem Phys 2016. [DOI: 10.1016/j.chemphys.2016.02.020] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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15
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INDRA SANDIPA, BISWAS RANJIT. Are N-methyl groups of Tetramethylurea (TMU) Hydrophobic? A composition and temperature-dependent fluorescence spectroscopic investigation of TMU/water binary mixtures. J CHEM SCI 2016. [DOI: 10.1007/s12039-016-1072-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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16
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Rani A, Jayaraj A, Jayaram B, Pannuru V. Trimethylamine-N-oxide switches from stabilizing nature: A mechanistic outlook through experimental techniques and molecular dynamics simulation. Sci Rep 2016; 6:23656. [PMID: 27025561 PMCID: PMC4812290 DOI: 10.1038/srep23656] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 03/08/2016] [Indexed: 12/13/2022] Open
Abstract
In adaptation biology of the discovery of the intracellular osmolytes, the osmolytes are found to play a central role in cellular homeostasis and stress response. A number of models using these molecules are now poised to address a wide range of problems in biology. Here, a combination of biophysical measurements and molecular dynamics (MD) simulation method is used to examine the effect of trimethylamine-N-oxide (TMAO) on stem bromelain (BM) structure, stability and function. From the analysis of our results, we found that TMAO destabilizes BM hydrophobic pockets and active site as a result of concerted polar and non-polar interactions which is strongly evidenced by MD simulation carried out for 250 ns. This destabilization is enthalpically favourable at higher concentrations of TMAO while entropically unfavourable. However, to the best of our knowledge, the results constitute first detailed unambiguous proof of destabilizing effect of most commonly addressed TMAO on the interactions governing stability of BM and present plausible mechanism of protein unfolding by TMAO.
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Affiliation(s)
- Anjeeta Rani
- Department of Chemistry, University of Delhi, Delhi-110 007, India
| | - Abhilash Jayaraj
- Department of Chemistry, Indian Institute of Technology, New Delhi-110 016, India
| | - B Jayaram
- Department of Chemistry, Indian Institute of Technology, New Delhi-110 016, India.,Supercomputing Facility for Bioinformatics &Computational Biology, Indian Institute of Technology, New Delhi-110 016, India.,Kusuma School of Biological Sciences, Indian Institute of Technology, New Delhi-110 016, India
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17
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Wang Y, Yao F, Kang XF. Tetramethylammonium-filled protein nanopore for single-molecule analysis. Anal Chem 2015; 87:9991-7. [PMID: 26337294 DOI: 10.1021/acs.analchem.5b02611] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Nanopore technology, as the simplest and most inexpensive single-molecule tool, is being intensively developed. In nanopore stochastic sensing, KCl and NaCl have traditionally been employed as pore-filled electrolytes for recording the change of ion conductance in nanopores triggered by analyte translocation through the pore. However, some challenges limit its further advance. Here we used tetramethylammonium (TMA) chloride, instead of KCl, as a novel analysis system for nanopores. Some unique nanopore characteristics were observed: (1) The stability of the planar lipid bilayer for embedding the protein pores was elevated at least 6 times. (2) The TMA-Cl system could effectively reduce the noise of single-channel recording. (3) It was easy to control the insertion of protein pores into the lipid bilayer, and the formed single nanopore could last for a sufficiently long time. (4) TMA-Cl could be used as a DNA speed bump in the nanopore to slow DNA translocation speed. (5) The capacity of the nanopore capture of DNA (capture rate) increased significantly and simultaneously increased the translocation time of DNA in the pore. (6) The TMA-filled nanopore could discriminate between various polynucleotides.
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Affiliation(s)
- Ying Wang
- Key Laboratory of Synthetic and Natural Functional Molecular Chemistry, College of Chemistry & Materials Science, Northwest University , Xi'an 710069, P. R. China
| | - Fujun Yao
- Key Laboratory of Synthetic and Natural Functional Molecular Chemistry, College of Chemistry & Materials Science, Northwest University , Xi'an 710069, P. R. China
| | - Xiao-feng Kang
- Key Laboratory of Synthetic and Natural Functional Molecular Chemistry, College of Chemistry & Materials Science, Northwest University , Xi'an 710069, P. R. China
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18
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Koga Y. Two-dimensional characterization of the effect of solute on H2O: A thermodynamic probing methodology. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2014.09.048] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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19
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Morita T, Miki K, Nitta A, Ohgi H, Westh P. Effects of constituent ions of a phosphonium-based ionic liquid on molecular organization of H2O as probed by 1-propanol: tetrabutylphosphonium and trifluoroacetate ions. Phys Chem Chem Phys 2015; 17:22170-8. [DOI: 10.1039/c5cp02329g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The phosphonium-based cation, [P4444]+, is significant amphiphile with strong hydrophobic and equally strong hydrophilic contributions.
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Affiliation(s)
- Takeshi Morita
- Graduate School of Advanced Integration Science
- Chiba University
- Chiba 263-8522
- Japan
| | - Kumiko Miki
- Department of Liberal Arts and Basic Sciences
- College of Industrial Technology
- Nihon University
- Narashino
- Japan
| | - Ayako Nitta
- Graduate School of Advanced Integration Science
- Chiba University
- Chiba 263-8522
- Japan
| | - Hiroyo Ohgi
- Graduate School of Advanced Integration Science
- Chiba University
- Chiba 263-8522
- Japan
| | - Peter Westh
- NSM Research for Functional Biomaterials
- Roskilde University
- Roskilde DK-4000
- Denmark
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20
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Grandhi TSP, Mallik A, Lin KN, Miryala B, Potta T, Tian Y, Rege K. Aminoglycoside antibiotic-derived anion-exchange microbeads for plasmid DNA binding and in situ DNA capture. ACS APPLIED MATERIALS & INTERFACES 2014; 6:18577-89. [PMID: 25314226 DOI: 10.1021/am503240q] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Plasmid DNA (pDNA) therapeutics are being investigated for gene therapy and DNA vaccines against diseases including cancer, cystic fibrosis and AIDS. In addition, several applications in modern biotechnology require pDNA for transient protein production. Here, we describe the synthesis, characterization, and evaluation of microbeads ("Amikabeads") derived from the aminoglycoside antibiotic amikacin for pDNA binding and in situ DNA capture from mammalian cells. The parental aminoglycoside-derived microbeads (Amikabeads-P) acted as anion-exchange materials, and demonstrated high capacities for binding pDNA. Binding of pDNA was significantly enhanced following quaternization of the amines on the microbeads (Amikabeads-Q). Amikabeads were further employed for the disruption and extraction of DNA from mammalian cells, indicating their utility for in situ DNA capture. Our results indicate that Amikabeads are a novel material, with multiple reactive groups for further conjugation, and can have several applications in plasmid DNA biotechnology.
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Affiliation(s)
- Taraka Sai Pavan Grandhi
- Harrington Biomedical Engineering, School of Biological and Health Systems Engineering ‡Chemical Engineering, School for Engineering of Matter, Transport, and Energy, Arizona State University , Tempe, Arizona 85287, United States
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21
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Zhuo HY, Jiang LX, Li QZ, Li WZ, Cheng JB. Is there an attractive interaction between two methyl groups? Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.05.074] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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22
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Microscopic insights into the protein-stabilizing effect of trimethylamine N-oxide (TMAO). Proc Natl Acad Sci U S A 2014; 111:8476-81. [PMID: 24912147 DOI: 10.1073/pnas.1403224111] [Citation(s) in RCA: 183] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Although it is widely known that trimethylamine N-oxide (TMAO), an osmolyte used by nature, stabilizes the folded state of proteins, the underlying mechanism of action is not entirely understood. To gain further insight into this important biological phenomenon, we use the C≡N stretching vibration of an unnatural amino acid, p-cyano-phenylalanine, to directly probe how TMAO affects the hydration and conformational dynamics of a model peptide and a small protein. By assessing how the lineshape and spectral diffusion properties of this vibration change with cosolvent conditions, we are able to show that TMAO achieves its protein-stabilizing ability through the combination of (at least) two mechanisms: (i) It decreases the hydrogen bonding ability of water and hence the stability of the unfolded state, and (ii) it acts as a molecular crowder, as suggested by a recent computational study, that can increase the stability of the folded state via the excluded volume effect.
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23
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Larini L, Shea JE. Double Resolution Model for Studying TMAO/Water Effective Interactions. J Phys Chem B 2013; 117:13268-77. [DOI: 10.1021/jp403635g] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Luca Larini
- Department of Chemistry
and Biochemistry
and of Physics, University of California, Santa Barbara, Santa Barbara, California 93106, United
States
| | - Joan-Emma Shea
- Department of Chemistry
and Biochemistry
and of Physics, University of California, Santa Barbara, Santa Barbara, California 93106, United
States
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24
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Koga Y, Sebe F, Nishikawa K. Effects of Tetramethyl- and Tetraethylammonium Chloride on H2O: Calorimetric and Near-Infrared Spectroscopic Study. J Phys Chem B 2013; 117:877-83. [DOI: 10.1021/jp3082744] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Yoshikata Koga
- Suitekijuku (Water Drop Institute), Vancouver, BC, Canada V6R 2P5, and
Department of Chemistry, The University of British Columbia, Vancouver, BC, Canada V6T 1Z1
| | - Fumie Sebe
- Graduate School of Advanced
Integration Sciences, Chiba University,
Chiba 263-8522 Japan
| | - Keiko Nishikawa
- Graduate School of Advanced
Integration Sciences, Chiba University,
Chiba 263-8522 Japan
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25
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Abstract
Proteins are marginally stable, and the folding/unfolding equilibrium of proteins in aqueous solution can easily be altered by the addition of small organic molecules known as cosolvents. Cosolvents that shift the equilibrium toward the unfolded ensemble are termed denaturants, whereas those that favor the folded ensemble are known as protecting osmolytes. Urea is a widely used denaturant in protein folding studies, and the molecular mechanism of its action has been vigorously debated in the literature. Here we review recent experimental as well as computational studies that show an emerging consensus in this problem. Urea has been shown to denature proteins through a direct mechanism, by interacting favorably with the peptide backbone as well as the amino acid side chains. In contrast, the molecular mechanism by which the naturally occurring protecting osmolyte trimethylamine N-oxide (TMAO) stabilizes proteins is not clear. Recent studies have established the strong interaction of TMAO with water. Detailed molecular simulations, when used with force fields that incorporate these interactions, can provide insight into this problem. We present the development of a model for TMAO that is consistent with experimental observations and that provides physical insight into the role of cosolvent-cosolvent interaction in determining its preferential interaction with proteins.
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Affiliation(s)
- Deepak R Canchi
- Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, USA
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26
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Koga Y. 1-Propanol probing methodology: two-dimensional characterization of the effect of solute on H2O. Phys Chem Chem Phys 2013; 15:14548-65. [DOI: 10.1039/c3cp51650d] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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27
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The role of the chemical burns caused by hydroxide ion in the toxicity of dermal exposure to tetramethylammonium ion in a rat model. Burns 2012; 38:1051-7. [DOI: 10.1016/j.burns.2012.02.027] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2011] [Revised: 02/21/2012] [Accepted: 02/23/2012] [Indexed: 11/20/2022]
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28
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Koga Y, Kondo T, Miyazaki Y, Inaba A. The Effects of Sulphate and Tartrate Ions on the Molecular Organization of Water: Towards Understanding the Hofmeister Series (VI). J SOLUTION CHEM 2012. [DOI: 10.1007/s10953-012-9880-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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29
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Rembert KB, Paterová J, Heyda J, Hilty C, Jungwirth P, Cremer PS. Molecular Mechanisms of Ion-Specific Effects on Proteins. J Am Chem Soc 2012; 134:10039-46. [DOI: 10.1021/ja301297g] [Citation(s) in RCA: 233] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Kelvin B. Rembert
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Jana Paterová
- Institute
of Organic Chemistry
and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 16610, Prague 6, Czech Republic
| | - Jan Heyda
- Institute
of Organic Chemistry
and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 16610, Prague 6, Czech Republic
| | - Christian Hilty
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Pavel Jungwirth
- Institute
of Organic Chemistry
and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 16610, Prague 6, Czech Republic
| | - Paul S. Cremer
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
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30
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Morita T, Westh P, Nishikawa K, Koga Y. Effects of Ethanol and Dimethyl Sulfoxide on the Molecular Organization of H2O as Probed by 1-Propanol. J Phys Chem B 2012; 116:7328-33. [DOI: 10.1021/jp303619q] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Takeshi Morita
- Graduate School of Advanced Integration Science, Chiba University, Chiba 263-8522 Japan
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31
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Hunger J, Tielrooij KJ, Buchner R, Bonn M, Bakker HJ. Complex Formation in Aqueous Trimethylamine-N-oxide (TMAO) Solutions. J Phys Chem B 2012; 116:4783-95. [DOI: 10.1021/jp212542q] [Citation(s) in RCA: 115] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Johannes Hunger
- FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz,
Germany
| | | | - Richard Buchner
- Institut für
Physikalische
und Theoretische Chemie, Universität Regensburg, 93040 Regensburg, Germany
| | - Mischa Bonn
- FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz,
Germany
| | - Huib J. Bakker
- FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands
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32
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Kondo T, Miyazaki Y, Inaba A, Koga Y. Effects of Carboxylate Anions on the Molecular Organization of H2O as Probed by 1-Propanol. J Phys Chem B 2012; 116:3571-7. [DOI: 10.1021/jp2118407] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Takemi Kondo
- Research Center for Structural Thermodynamics, Graduate
School of Sciences, Osaka University, Toyonaka,
Osaka 560-0043 Japan
| | - Yuji Miyazaki
- Research Center for Structural Thermodynamics, Graduate
School of Sciences, Osaka University, Toyonaka,
Osaka 560-0043 Japan
| | - Akira Inaba
- Research Center for Structural Thermodynamics, Graduate
School of Sciences, Osaka University, Toyonaka,
Osaka 560-0043 Japan
| | - Yoshikata Koga
- Department of Chemistry, The University of British Columbia, Vancouver, BC Canada V6T 1Z1
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33
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Yoshida K, Baluja S, Inaba A, Koga Y. Acceleration of the effect of solute on the entropy-volume cross fluctuation density in aqueous 2-butoxyethanol, 1-propanol, and glycerol: The fourth derivative of Gibbs energy. J Chem Phys 2011; 134:214502. [DOI: 10.1063/1.3595263] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
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