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Nguyen SV, Levintov L, Planalp RP, Vashisth H. Interactions and Transport of a Bioconjugated Peptide Targeting the Mitomembrane. Bioconjug Chem 2024; 35:371-380. [PMID: 38404183 PMCID: PMC10961729 DOI: 10.1021/acs.bioconjchem.3c00561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 02/10/2024] [Accepted: 02/13/2024] [Indexed: 02/27/2024]
Abstract
The Szeto-Schiller (SS) peptides are a subclass of cell-penetrating peptides that can specifically target mitochondria and mediate conditions caused by mitochondrial dysfunction. In this work, we constructed an iron-chelating SS peptide and studied its interaction with a mitochondrial-mimicking membrane using atomistic molecular dynamics (MD) simulations. We report that the peptide/membrane interaction is thermodynamically favorable, and the localization of the peptide to the membrane is driven by electrostatic interactions between the cationic residues and the anionic phospholipid headgroups. The insertion of the peptide into the membrane is driven by hydrophobic interactions between the aromatic side chains in the peptide and the lipid acyl tails. We also probed the translocation of the peptide across the membrane by applying nonequilibrium steered MD simulations and resolved the translocation pathway, free energy profile, and metastable states. We explored four distinct orientations of the peptide along the translocation pathway and found that one orientation was energetically more favorable than the other orientations. We tested a significantly slower pulling velocity on the most thermodynamically favorable system and compared metastable states during peptide translocation. We found that the peptide can optimize hydrophobic interactions with the membrane by having aromatic side chains interacting with the lipid acyl tails instead of forming π-π interactions with each other. The mechanistic insights emerging from our work will potentially facilitate improved peptide design with enhanced activity.
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Affiliation(s)
- Son V. Nguyen
- Department
of Chemistry, University of New Hampshire, Durham, New Hampshire 03824, United States
| | - Lev Levintov
- Department
of Chemical Engineering & Bioengineering, University of New Hampshire, Durham, New Hampshire 03824, United States
| | - Roy P. Planalp
- Department
of Chemistry, University of New Hampshire, Durham, New Hampshire 03824, United States
| | - Harish Vashisth
- Department
of Chemistry, University of New Hampshire, Durham, New Hampshire 03824, United States
- Department
of Chemical Engineering & Bioengineering, University of New Hampshire, Durham, New Hampshire 03824, United States
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2
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Ruttinger AW, Pálsdóttir A, Tester JW, Clancy P. A Quantitative Metric for the Design of Selective Supercritical CO 2 Extraction of Lithium from Geothermal Brine. CHEMSUSCHEM 2019; 12:3532-3540. [PMID: 31251455 DOI: 10.1002/cssc.201901200] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Revised: 06/26/2019] [Indexed: 06/09/2023]
Abstract
As demand grows for lithium, its recovery from geothermal brines provides an attractive alternative to slow mining. One promising extraction method uses crown ethers as extractants in supercritical carbon dioxide with cation exchangers to facilitate extraction from brine. Molecular dynamics modeling is used to understand the mechanism of binding between lithium (or sodium) and combinations of 14-crown-4 ethers and cation exchangers, and the predictive capability of computational modeling to test lithium selectivity is established for four combinations of crown ethers [methylene-14-crown-4 (M14C4) and a fluorinated 14-crown-4 (F14C4)] and cation exchangers [di(2-ethyl-hexyl)phosphoric acid (HDEHP) and tetraethylammonium perfluoro-1-octanesulfonate (TPFOS)]. Binding free energies (given in kcal mol-1 ) of lithium and sodium, respectively, to crown ether-cation exchangers are 85 and 71 for M14C4-HDEHP, 90 and 71 for F14C4-HDEHP, 93 and 80 for M14C4-TPFOS, and 104 and 93 for F14C4-TPFOS. Good agreement is found between computational predictions and supercritical carbon dioxide extraction experiments at 60 °C and 250 bar. Binding free energy gives a suitable metric to describe extraction efficiency. Differences in the binding free energies of sodium and lithium to crown ethers determine the extraction selectivity. Fluorine groups are found to exert a positive influence to optimize extraction efficiency. Of the systems studied, F14C4 with TPFOS offers the most selective and efficient extraction system.
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Affiliation(s)
- Andrew W Ruttinger
- Robert F. Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - Arna Pálsdóttir
- Robert F. Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY, 14853, USA
- Cornell Energy Systems Institute, Ithaca, NY, 14853, USA
| | - Jefferson W Tester
- Robert F. Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY, 14853, USA
- Cornell Energy Systems Institute, Ithaca, NY, 14853, USA
| | - Paulette Clancy
- Dept. of Chemical and Biomolecular Engineering, The Johns Hopkins University, Baltimore, MD, 21218, USA
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Molecular Dynamics Simulation of Distribution and Diffusion Behaviour of Oil⁻Water Interfaces. Molecules 2019; 24:molecules24101905. [PMID: 31108938 PMCID: PMC6572532 DOI: 10.3390/molecules24101905] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 05/11/2019] [Accepted: 05/16/2019] [Indexed: 11/30/2022] Open
Abstract
The distribution and diffusion behaviors of microscopic particles at fluorobenzene–water and pentanol–water interfaces are investigated using molecular dynamics simulation. The influences of Na+/Cl− ions and the steric effects of organic molecules are examined. The concentration distributions of different species, the orientations of oil molecules at the interface, and oil–water interface morphology as well as the diffusion behaviors of water molecules are explored and analyzed. The results indicate that a few fluorobenzene molecules move into the water phase influenced by Na+/Cl− ions, while the pentanol molecules at the interface prefer orientating their hydrophilic groups toward the water phase due to their large size. The water molecules more easily burst into the pentanol phase with larger molecular spaces. As the concentration of ions in the water phase increases, more water molecules enter into the pentanol molecules, leading to larger interface roughness and interface thickness. In addition, a lower diffusion coefficient for water molecules at the fluorobenzene–water interface are observed when introducing Na+/Cl− ions in the water phase, while for the pentanol–water system, the mobility of interfacial water molecules are enhanced with less ions and inhibited with more ions.
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Benay G, Wipff G. Liquid–liquid extraction of alkali cations by 18-crown-6: complexation and interface crossing studied by MD and PMF simulations. NEW J CHEM 2016. [DOI: 10.1039/c5nj02609a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The 18C6/M+Pic−complexes form and adsorb “right at the nano-interface” where 18C6 prefers the K+guest.
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Affiliation(s)
- Gael Benay
- Laboratoire MSM
- UMR 7140
- Institut de Chimie
- 67000 Strasbourg
- France
| | - Georges Wipff
- Laboratoire MSM
- UMR 7140
- Institut de Chimie
- 67000 Strasbourg
- France
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Benay G, Wipff G. Ammonium Recognition by 18-Crown-6 in Different Solutions and at an Aqueous Interface: A Simulation Study. J Phys Chem B 2014; 118:13913-29. [DOI: 10.1021/jp508379w] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- G. Benay
- Laboratoire MSM, UMR 7177, Institut de Chimie, 1 rue B. Pascal, 67000 Strasbourg, France
| | - G. Wipff
- Laboratoire MSM, UMR 7177, Institut de Chimie, 1 rue B. Pascal, 67000 Strasbourg, France
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6
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Ozer G, Keyes T, Quirk S, Hernandez R. Multiple branched adaptive steered molecular dynamics. J Chem Phys 2014; 141:064101. [DOI: 10.1063/1.4891807] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Gungor Ozer
- Department of Chemistry, Boston University, Boston, Massachusetts 02215-2521, USA
| | - Thomas Keyes
- Department of Chemistry, Boston University, Boston, Massachusetts 02215-2521, USA
| | - Stephen Quirk
- Kimberly-Clark Corporation, Atlanta, Georgia 30076-2199, USA
- Center for Computational and Molecular Science and Technology, School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, USA
| | - Rigoberto Hernandez
- Center for Computational and Molecular Science and Technology, School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, USA
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Holmberg N, Sammalkorpi M, Laasonen K. Ion Transport through a Water–Organic Solvent Liquid–Liquid Interface: A Simulation Study. J Phys Chem B 2014; 118:5957-70. [DOI: 10.1021/jp412162c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Nico Holmberg
- Department
of Chemistry, Aalto University, Aalto, Finland
| | | | - Kari Laasonen
- Department
of Chemistry, Aalto University, Aalto, Finland
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Benay G, Wipff G. Liquid–Liquid Extraction of Uranyl by TBP: The TBP and Ions Models and Related Interfacial Features Revisited by MD and PMF Simulations. J Phys Chem B 2014; 118:3133-49. [DOI: 10.1021/jp411332e] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- G. Benay
- Laboratoire MSM, UMR 7177, Institut de
Chimie, 1 rue B. Pascal, 67000 Strasbourg, France
| | - G. Wipff
- Laboratoire MSM, UMR 7177, Institut de
Chimie, 1 rue B. Pascal, 67000 Strasbourg, France
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Valente M, Sousa SF, Magalhães AL, Freire C. Dehydration of a polyether type extraction agent and of the corresponding K+ complex: insights into liquid-liquid extraction mechanisms by quantum chemical methods. J Mol Model 2012; 18:4909-15. [DOI: 10.1007/s00894-012-1491-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2012] [Accepted: 06/04/2012] [Indexed: 10/28/2022]
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