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Yang J, Yu G, Sessler JL, Shin I, Gale PA, Huang F. Artificial transmembrane ion transporters as potential therapeutics. Chem 2021. [DOI: 10.1016/j.chempr.2021.10.028] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Barboiu M. Encapsulation versus Self-Aggregation toward Highly Selective Artificial K + Channels. Acc Chem Res 2018; 51:2711-2718. [PMID: 30346726 DOI: 10.1021/acs.accounts.8b00311] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Natural ion-channel proteins allow ion transport across cell membranes at rates very close to those for ionic diffusion in water. Among them, natural KcsA K+ channels present high transport rates and total selectivity for K+ cations, rejecting all other cations. Most of the reported artificial ion channels cannot reach this type of activity because of their low selectivity. Several synthetic channels have been designed to mimic the natural KcSA channels, but those presenting an important K+/Na+ selectivity are limited. High-selectivity issues are determinant for the performance of natural protein channels, but they have been not considered as determinant in controlling the transport activity of the artificial ion channels. This Account discusses the last developments of artificial supramolecular carriers or channels that selectively transport K+ cations against other cations. Mimicking the complex structures of protein channels is an important research area. These studies are related to such adaptive biomimetic systems that can self-select their functions, with a specific emphasis on artificial superstructures enabling K+ transport like in the natural ones. Alternatively, it is more than interesting to synthetically construct only the active key structures of protein filters or gates that give the chemical selectivity or lead us to describe their dynamic role in the ion pumping and translocation along the channel. Several self-assembled macrocyclic channels are presented here. The macrocyclic binding sites may selectively encapsulate the K+ cations or form aggregated H-bonded central pores of self-assembled macrocycles that coordinate the K+ cations as hydrating water molecules in aqueous solution, compensating for the energetic cost of cation dehydration. These macrocyclic channels are responsive in the presence of K+ cations, even when a large excess of Na+ is present. From the mechanistic point of view, these systems express a synergistic dynamic feature: addition of K+ cations drives the selection and emergence of specific ion channels that selectively conduct the K+ cations that promoted the formation of channel superstructures in the first place. These highly permeable and K+-selective artificial channels may be considered as simple primitive biomimetic alternatives of natural KcsA channels that may find interesting applications in chemical separations, selective sensing, and biomedical materials.
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Affiliation(s)
- Mihail Barboiu
- Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
- Institut Europeen des Membranes, Adaptive Supramolecular Nanosystems Group, University of Montpellier, ENSCM-CNRS, Place E. Bataillon CC047, Montpellier 34095, France
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Blondeau P, Barboiu M, Petit E. Ion-fuelled L-Phenylalanine controlled pumping by hybrid membrane materials. REACT FUNCT POLYM 2015. [DOI: 10.1016/j.reactfunctpolym.2014.08.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Bhushan B, Luo D, Schricker SR, Sigmund W, Zauscher S. Hierarchical Self-Assembled Peptide Nano-ensembles. HANDBOOK OF NANOMATERIALS PROPERTIES 2014. [PMCID: PMC7123264 DOI: 10.1007/978-3-642-31107-9_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A variety of peptides can be self-assembled, i.e. self-organized spontaneously, into large and complex hierarchical structures, reproducibly by regulating a range of parameters that can be environment driven, process driven, or peptide driven. These supramolecular peptide aggregates yield different shapes and structures like nanofibers, nanotubes, nanobelts, nanowires, nanotapes, and micelles. These peptide nanostructures represent a category of materials that bridge biotechnology and nanotechnology and are found suitable not only for biomedical applications such as tissue engineering and drug delivery but also in nanoelectronics.
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Affiliation(s)
- Bharat Bhushan
- Nanoprobe Laboratory for Bio- & Nanotechnology and Biomimetics, Ohio State University, Columbus, Ohio USA
| | - Dan Luo
- Department of Biological and Environmental Engineering, Cornell University, Ithaca, New York USA
| | - Scott R. Schricker
- Division of Restorative, Prosthetic and Primary Care, The Ohio State University, College of Dentistry, Columbus, Ohio USA
| | - Wolfgang Sigmund
- Department of Materials Science and Engineering, University of Florida, Gainesville, Florida USA
| | - Stefan Zauscher
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina USA
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Fasting C, Schalley CA, Weber M, Seitz O, Hecht S, Koksch B, Dernedde J, Graf C, Knapp EW, Haag R. Multivalenz als chemisches Organisations- und Wirkprinzip. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201201114] [Citation(s) in RCA: 164] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Fasting C, Schalley CA, Weber M, Seitz O, Hecht S, Koksch B, Dernedde J, Graf C, Knapp EW, Haag R. Multivalency as a Chemical Organization and Action Principle. Angew Chem Int Ed Engl 2012; 51:10472-98. [DOI: 10.1002/anie.201201114] [Citation(s) in RCA: 688] [Impact Index Per Article: 57.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Indexed: 12/26/2022]
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Le Duc Y, Michau M, Gilles A, Gence V, Legrand YM, van der Lee A, Tingry S, Barboiu M. Imidazole-Quartet Water and Proton Dipolar Channels. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201103312] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Le Duc Y, Michau M, Gilles A, Gence V, Legrand YM, van der Lee A, Tingry S, Barboiu M. Imidazole-Quartet Water and Proton Dipolar Channels. Angew Chem Int Ed Engl 2011; 50:11366-72. [DOI: 10.1002/anie.201103312] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2011] [Indexed: 01/11/2023]
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Dynamic hybrid materials for constitutional self-instructed membranes. Proc Natl Acad Sci U S A 2009; 106:8117-22. [PMID: 19416909 DOI: 10.1073/pnas.0813257106] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Constitutional self-instructed membranes were developed and used for mimicking the adaptive structural functionality of natural ion-channel systems. These membranes are based on dynamic hybrid materials in which the functional self-organized macrocycles are reversibly connected with the inorganic silica through hydrophobic noncovalent interactions. Supramolecular columnar ion-channel architectures can be generated by reversible confinement within scaffolding hydrophobic silica mesopores. They can be structurally determined by using X-ray diffraction and morphologically tuned by alkali-salts templating. From the conceptual point of view, these membranes express a synergistic adaptive behavior: the simultaneous binding of the fittest cation and its anion would be a case of "homotropic allosteric interactions," because in time it increases the transport efficiency of the pore-contained superstructures by a selective evolving process toward the fittest ion channel. The hybrid membranes presented here represent dynamic constitutional systems evolving over time to form the fittest ion channels from a library of molecular and supramolecular components, or selecting the fittest ion pairs from a mixture of salts demonstrating flexible adaptation.
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Michau M, Caraballo R, Arnal-Hérault C, Barboiu M. Alkali cation-π aromatic conduction pathways in self-organized hybrid membranes. J Memb Sci 2008. [DOI: 10.1016/j.memsci.2007.12.044] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Dutot L, Gaucher A, Elkassimi K, Drapeau J, Wakselman M, Mazaleyrat JP, Peggion C, Formaggio F, Toniolo C. Synthesis and Characterisation of Helical β-Peptide Architectures that Contain (S)-β3-HDOPA(Crown Ether) Derivatives. Chemistry 2008; 14:3154-63. [DOI: 10.1002/chem.200701360] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Michau M, Barboiu M, Caraballo R, Arnal-Hérault C, Perriat P, van der Lee A, Pasc A. Ion-Conduction Pathways in Self-Organised Ureidoarene–Heteropolysiloxane Hybrid Membranes. Chemistry 2008; 14:1776-83. [DOI: 10.1002/chem.200700943] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Reiß P, Al-Momani L, Koert U. A Voltage-Responding Ion Channel Derived by C-Terminal Modification of Gramicidin A. Chembiochem 2008; 9:377-9. [DOI: 10.1002/cbic.200700519] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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14
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Montero A, Albericio F, Royo M, Herradón B. Synthesis of a 24-Membered Cyclic Peptide-Biphenyl Hybrid. European J Org Chem 2007. [DOI: 10.1002/ejoc.200600833] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Norgren AS, Büttner F, Prabpai S, Kongsaeree P, Arvidsson PI. β2-Amino Acids in the Design of Conformationally Homogeneous cyclo-Peptide Scaffolds. J Org Chem 2006; 71:6814-21. [PMID: 16930031 DOI: 10.1021/jo060854n] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein, we report studies on the influence of chiral beta(2)-amino acids in the design of conformationally homogeneous cyclic tetrapeptide scaffolds. The cyclic alpha-tetrapeptide cyclo(-Phe-D-Pro-Lys-Phe-) (1) and its four mixed analogues, having one of the alpha-Phe replaced by either an (S)- or an (R)-beta(2)hPhe residue (i.e., cyclo(-(R)-beta(2)hPhe-D-Pro-Lys-Phe) (2a), cyclo(-(S)-beta(2)hPhe-D-Pro-Lys-Phe-) (2b), cyclo(-Phe-D-Pro-Lys-(R)-beta(2)hPhe-) (3a), and cyclo(-Phe-D-Pro-Lys-(R)-beta(2)hPhe-) (3b)), were all synthesized through solid-phase procedures followed by solution-phase cyclization. Initially, all five cyclo-peptides were analyzed by (1)H NMR spectroscopic studies in different solvents and at variable temperatures. Subsequently, a detailed 2D NMR spectroscopic analysis of three of the mixed peptides in water was performed, and the information thus extracted was used as restraints in a computational study on the peptides' conformational preference. An X-ray crystallographic study on the side chain-protected (Boc) 2a revealed the solid-state structure of this peptide. The results presented herein, together with previous literature data on beta(3)-amino acid residues, conclusively demonstrate the potential of beta-amino acids in the design of conformationally homogeneous cyclic peptides that are homologous to peptides with known applications in biomedicinal chemistry and as molecular receptors.
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Affiliation(s)
- Anna S Norgren
- Department of Biochemistry and Organic Chemistry, Uppsala University, Box 576, SE-75123 Uppsala, Sweden
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Schröder S, Schrey AK, Knoll A, Reiß P, Ziemer B, Koert U. Tetrahydropyran-Amino Acids: Novel Building Blocks for Gramicidin-Hybrid Ion Channels. European J Org Chem 2006. [DOI: 10.1002/ejoc.200600068] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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17
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Abstract
The neutral form of the unnatural amino acid phenylglycine was vaporized by laser ablation, and the presence of two conformers was detected in a supersonic expansion by Fourier transform microwave spectroscopy. Both conformers were unequivocally identified by comparison of their experimental rotational and quadrupole coupling constants with those calculated ab initio. The most stable conformer is stabilized by intramolecular hydrogen bonds N-H...O=C, N-H...pi (with the closest C-C bond in the aromatic ring), and a cis-COOH interaction. The other conformer exhibits a O-H...N hydrogen bond between the hydrogen atom of the hydroxyl group and the lone pair at the nitrogen atom.
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Affiliation(s)
- M Eugenia Sanz
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, 47005 Valladolid, Spain
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Pfeifer JR, Reiss P, Koert U. Crown Ether-Gramicidin Hybrid Ion Channels: Dehydration-Assisted Ion Selectivity. Angew Chem Int Ed Engl 2006; 45:501-4. [PMID: 16342124 DOI: 10.1002/anie.200502570] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jochen R Pfeifer
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse, 35032 Marburg, Germany
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Pfeifer JR, Reiß P, Koert U. Ionenkanäle aus Kronenether-Gramicidin-Hybriden: Ionenselektivität durch Unterstützung des Dehydratationsvorgangs. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200502570] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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21
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Licini G, Prins LJ, Scrimin P. Oligopeptide Foldamers: From Structure to Function. European J Org Chem 2005. [DOI: 10.1002/ejoc.200400521] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Giulia Licini
- University of Padova, Department of Chemical Sciences, and ITM‐CNR, Padova Section, Via Marzolo, 1, 35131 Padova, Italy
| | - Leonard J. Prins
- University of Padova, Department of Chemical Sciences, and ITM‐CNR, Padova Section, Via Marzolo, 1, 35131 Padova, Italy
| | - Paolo Scrimin
- University of Padova, Department of Chemical Sciences, and ITM‐CNR, Padova Section, Via Marzolo, 1, 35131 Padova, Italy
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22
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Buschhaus B, Hirsch A. Diastereoselective Assembly of Chiral RuII-Coordinated Depsipeptide-Dendrimers. European J Org Chem 2005. [DOI: 10.1002/ejoc.200400712] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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23
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Abstract
Derivatives of amino acids bearing a porphyrin moiety on a side chain were synthesized by coupling a porphyrin to a glutamic acid side chain; the utility of these compounds was demonstrated by their use in solid-phase synthesis of a peptide bearing a cationic porphyrin and by studying its DNA-binding properties.
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Affiliation(s)
- Eric Biron
- Département de chimie and CREFSIP, Faculté des sciences et de génie, Université Laval, Québec, Québec, Canada G1K 7P4
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24
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Albrecht M, Stortz P. Metallacyclopeptides: Artificial analogues of naturally occurring peptides. Chem Soc Rev 2005; 34:496-506. [PMID: 16137162 DOI: 10.1039/b405660d] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Naturally occurring metalloproteins contain metal ions either to introduce a special reactivity or to stabilize a peptide structure. Since the early 1990s, chemists have been trying to use metal coordination for the fixation of short artificial peptides in well-defined cyclic structures. In this tutorial review a survey of the general approaches towards metallacyclopeptides as small cyclic peptide derivatives or as a part of a bigger alpha-helix (or beta-sheet) structure is given. In three case studies it is shown how naturally occurring compounds can be mimicked by metal coordination to non-natural peptide derivatives.
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Affiliation(s)
- Markus Albrecht
- Institut für Organische Chemie, RWTH-Aachen, D-52074 Aachen, Germany.
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25
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Pérez-Hernández N, Pérez C, Rodríguez ML, Foces-Foces C, Tolstoy PM, Limbach HH, Morales EQ, Pérez R, Martín JD. Water molecules in hydroxy/acid networks as a competition between dynamics and bonding. Synthesis of a wet hydrophobic pore. Bioorg Med Chem 2004; 12:1305-14. [PMID: 15018902 DOI: 10.1016/j.bmc.2003.06.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2003] [Revised: 06/26/2003] [Accepted: 06/27/2003] [Indexed: 10/26/2022]
Abstract
In a model formed by hydroxy acids with a general structure (+/-)-1, we found that solid-state structures depend on steric interactions. Thus, with the exception of molecules 1b and 1e, compounds (+/-)-1a-(+/-)-1m, which possess bulky and conformationally rigid substituents, aggregate by forming tapes and sheets by alternating (+) and (-) subunits held together via carboxylic acid to alcohol hydrogen bonds. Homologue (+/-)-1n with conformationally flexible substituents, which allow conformational deformation gives, by way of the incorporation of water molecules, an efficient hexagonal assembly, which extends to the third-dimension to form tubular H-bonding networks. Each puckered channel can be described as being interconnected by closely packed hexagons in chair-like conformations. The ethyl groups presented in (+/-)-1n provided the volume required to lock the inner hexagonal wall into a rigid structure.
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Affiliation(s)
- Natalia Pérez-Hernández
- Instituto de Investigaciones Químicas, CSIC, Americo Vespucio, s/n, Isla de La Cartuja, 41092, Sevilla, Spain
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Biron E, Otis F, Meillon JC, Robitaille M, Lamothe J, Van Hove P, Cormier ME, Voyer N. Design, synthesis, and characterization of peptide nanostructures having ion channel activity. Bioorg Med Chem 2004; 12:1279-90. [PMID: 15018900 DOI: 10.1016/j.bmc.2003.08.037] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2003] [Revised: 07/31/2003] [Accepted: 08/01/2003] [Indexed: 11/24/2022]
Abstract
We report the synthesis and the functional studies of multiple crown alpha-helical peptides designed to form artificial ion channels. The approach combines the versatility of solid phase peptide synthesis, the conformational predictability of peptidic molecules, and the solution synthesis of crown ethers with engineerable ion-binding abilities. Several biophysical methods were employed to characterize the activity and the mode of action of these crown peptide nanostructures. The 21 residue peptides bearing six 21-EC-7 turned out to facilitate the translocation of ions in a similar fashion to natural ion channels.
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Affiliation(s)
- Eric Biron
- Département de chimie and Centre de recherche sur la fonction, la structure et l'ingénierie des protéines, Faculté des sciences et de génie, Université Laval, Québec, Canada G1K 7P4
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Herradón B, Montero A, Mann E, Maestro MA. Crystallization-induced dynamic resolution and analysis of the non-covalent interactions in the crystal packing of peptide–biphenyl hybrids. CrystEngComm 2004. [DOI: 10.1039/b406652a] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Dzygiel A, Rzeszotarska B, Masiukiewicz E, Cmoch P, Kamieński B. Synthesis, Structure and Properties of N-Acetylated Derivatives of Methyl 5-Amino-1H-[1,2,4]triazole-3-carboxylate. Chem Pharm Bull (Tokyo) 2004; 52:192-8. [PMID: 14758003 DOI: 10.1248/cpb.52.192] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Methyl 5-amino-1H-[1,2,4]triazole-3-carboxylate hydrochloride (1). and free ester (2). were obtained and 2 was reacted with Ac(2)O to give the acetylated products 3-6. Compounds 1-6 were studied using HPLC, GC-MS, FTIR and multinuclear NMR spectroscopy, including the cross-polarisation magic angle spinning (CPMAS) technique. The results of the acetylation of 2 were compared to those of the acetylation of 5-amino-1H-[1,2,4]triazole, and for 2 a significant decrease in the susceptibility to acetylation was found. The reaction of 2 with Ac(2)O at 20 degrees C, regardless of the amount and the concentration of the latter, including neat Ac(2)O, proceeds fully regioselectively and leads to one product: methyl 1-acetyl-5-amino-1H-[1,2,4]triazole-3-carboxylate (3). In sharp contrast to 5-amino-1H-[1,2,4]triazole, neither an additional monoacetylated isomer, whether annular or exocyclic, nor any diacetylated derivative could be detected. The diacetylation of 2 requires the process to be carried out in neat boiling Ac(2)O and, as in the case of 5-amino-1H-[1,2,4]triazole, gives two diacetylated isomers. These are methyl 1-acetyl-3-(acetylamino)-1H-[1,2,4]triazole-5-carboxylate (4) and 1-acetyl-5-(acetylamino)-1H-[1,2,4]triazole-3-carboxylate (5). Hypothetical pathways of their formation have been suggested. A mixture of 4 and 5 upon hydrolysis of the ring acetyl group gives the monoacetylated derivative methyl 5-(acetylamino)-1H-[1,2,4]triazole-3-carboxylate (6). The spectroscopic, structural and conformational characteristics of compounds 1-6 have been given and methods for their preparation have been provided.
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Affiliation(s)
- Anetta Dzygiel
- Institute of Chemistry, University of Opole, Opole, Poland
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Vescovi A, Knoll A, Koert U. Synthesis and functional studies of THF-gramicidin hybrid ion channels. Org Biomol Chem 2003; 1:2983-97. [PMID: 12968351 DOI: 10.1039/b303249n] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
THF-gramicidin hybrids 2-4 with the L-THF amino acid 1 in positions 11 and 12 and compounds 5-8 with the D-THF amino acid ent-1 in positions 10 and 11 were synthesized and their ion channel properties were studied by single-channel-current analysis. The replacement of positions 11 and 12 by the L-THF amino acid 1 gave a strongly reduced channel performance. In contrast, replacement of positions 10 and 11 by the D-THF amino acid ent-1 gave rise to new and interesting channel properties. For the permeability ratios, the ion selectivity shifts from Eisenman I towards Eisenman III selectivity and the channels display ms-dynamics. Most remarkable is the asymmetric compound 8, which inserts selectively into a DPhPC membrane and displays voltage-directed gating dynamics.
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Affiliation(s)
- Andrea Vescovi
- Institut für Chemie, Humboldt-Universität Berlin, Brook-Taylor-Str. 2, D-12489 Berlin, Germany
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Matile S. Bioorganic chemistry à la baguette: studies on molecular recognition in biological systems using rigid-rod molecules. CHEM REC 2003; 1:162-72. [PMID: 11893065 DOI: 10.1002/tcr.6] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Initial studies using rigid-rod molecules or "baguettes" to address bioorganic topics of current scientific concern are reported. It is illustrated how transmembrane oligo(p-phenylene)s as representative model rods can be tuned to recognize lipid bilayer membranes either by their thickness or polarization. The construction of otherwise problematic hydrogen-bonded chains along transmembrane rods yields "proton wires," which act by a mechanism that is central in bioenergetics but poorly explored by means of synthetic models. Another example focuses on multivalent ligands assembling rigid-rod cell-surface receptors into transmembrane dynamic arene arrays. The potassium transport mediated by these ligand-receptor complexes provides experimental support for the potential biological importances of the controversial cation-pi mechanism. More complex supramolecular architecture is portrayed in the first artificial beta-barrels. It is shown how programmed assembly of toroidal rigid-rod supramolecules in detergent-free water permits control of diameter of the chemical nature of their interior. Reversed rigid-rod beta-barrels are assembled to function as self-assembled ionophores, ion channel models, and transmembrane nanopores. The potential of future intratoroidal chemistry is exemplified by encapsulation and planarization of beta-carotene in water and the construction of transmembrane B-DNA at the center of a second-sphere host-guest complex à al baguette.
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Affiliation(s)
- S Matile
- Department of Organic Chemistry, University of Geneva, Switzerland.
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Mazaleyrat JP, Goubard Y, Azzini MV, Wakselman M, Peggion C, Formaggio F, Toniolo C. Synthesis of the First Axially Dissymmetric,Cα,α-Disubstituted Glycine Containing a Crown Ether Receptor, and the Conformational Preferences of a Model Peptide. European J Org Chem 2002. [DOI: 10.1002/1099-0690(200204)2002:7<1232::aid-ejoc1232>3.0.co;2-i] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Arndt HD, Vescovi A, Schrey A, Pfeifer JR, Koert U. Solution phase synthesis and purification of the minigramicidin ion channels and a succinyl-linked gramicidin. Tetrahedron 2002. [DOI: 10.1016/s0040-4020(02)00179-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Biron E, Voyer N, Meillon JC, Cormier ME, Auger M. Conformational and orientation studies of artificial ion channels incorporated into lipid bilayers. Biopolymers 2001; 55:364-72. [PMID: 11241211 DOI: 10.1002/1097-0282(2000)55:5<364::aid-bip1010>3.0.co;2-z] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The conformational and orientation studies in lipid bilayers of 21 amino acid peptides bearing six crown ethers are reported. The compounds were designed to form artificial ion channels by stacking the crown rings, and were shown to be functional in bilayer membranes. We used Fourier transform infrared spectroscopy and CD spectropolarimetry to study the conformation of the peptides in solution and in lipid bilayers. These studies revealed that hexacrown peptides retain their alpha-helical conformation when incorporated in a lipid bilayer environment. Attenuated total reflectance spectroscopy was used to investigate the orientation of the peptides in a lipid bilayer. Results demonstrated that the peptides are not oriented at a fixed angle in membrane, but rather are in incorporation equilibrium between an active state parallel to the lipid chain and an inactive state adsorbed at the surface of the bilayer. From these results, we propose a model for the channel activity and the gating mechanism of these hexacrown peptides in bilayer membranes.
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Affiliation(s)
- E Biron
- Département de chimie and Centre de recherche sur la fonction, la structure et l'ingénierie des protéines, Faculté des sciences et de génie, Université Laval, Québec, Québec, Canada G1K 7P4
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Geißer B, König B, Alsfasser R. Selective Recognition of Copper(II) by a Water-Soluble, Emitter-Receptor Conjugate Containing a Ruthenium Chromophore, a Lysine Bridge, and a Cyclen Unit. Eur J Inorg Chem 2001. [DOI: 10.1002/1099-0682(200106)2001:6<1543::aid-ejic1543>3.0.co;2-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Arndt HD, Knoll A, Koert U. Cyclohexyletherδ-Amino Acids: New Leads for Selectivity Filters in Ion Channels. Angew Chem Int Ed Engl 2001; 40:2076-2078. [DOI: 10.1002/1521-3773(20010601)40:11<2076::aid-anie2076>3.0.co;2-g] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2000] [Indexed: 11/05/2022]
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Mazaleyrat JP, Wright K, Wakselman M, Formaggio F, Crisma M, Toniolo C. 9-Amino-4,5-diazafluorene-9-carboxylic Acid (Daf), a New Cα,α-Disubstituted Glycine Containing a Spatially Constrained Bipyridine-Like Ligand for Transition Metals − Synthesis and Evaluation of Peptide-Coupling Conditions at itsC- andN-Termini. European J Org Chem 2001. [DOI: 10.1002/1099-0690(200105)2001:10<1821::aid-ejoc1821>3.0.co;2-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Niklas N, Wolf S, Liehr G, Anson CE, Powell AK, Alsfasser R. Ni(II), Cu(II) and Zn(II) complexes of a bifunctional bis(picolyl)amine (bpa) ligand derived from glycine. Inorganica Chim Acta 2001. [DOI: 10.1016/s0020-1693(01)00300-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Yoshino N, Satake A, Kobuke Y. An Artificial Ion Channel Formed by a Macrocyclic Resorcin[4]arene with Amphiphilic Cholic Acid Ether Groups. Angew Chem Int Ed Engl 2001. [DOI: 10.1002/1521-3757(20010119)113:2<471::aid-ange471>3.0.co;2-j] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Yoshino N, Satake A, Kobuke Y. An Artificial Ion Channel Formed by a Macrocyclic Resorcin[4]arene with Amphiphilic Cholic Acid Ether Groups. Angew Chem Int Ed Engl 2001; 40:457-459. [DOI: 10.1002/1521-3773(20010119)40:2<457::aid-anie457>3.0.co;2-f] [Citation(s) in RCA: 86] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2000] [Indexed: 11/10/2022]
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Voyer N, Côté S, Biron É, Beaumont M, Chaput M, Levac S. Chiral recognition of carboxylic acids by bis-crown ether peptides. ACTA ACUST UNITED AC 2001. [DOI: 10.1016/s1472-7862(01)00008-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Espínola CG, Delgado M, Martín JD. Synthetic flux-promoting polyether models: Cation flux dependence on polyoxyethylene chain length. Isr J Chem 2000. [DOI: 10.1560/91ne-j495-lute-rg07] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Chiroptical rhythmicity, part 3: implications on the activity of the functional cell-surface receptor model. Colloids Surf A Physicochem Eng Asp 2000. [DOI: 10.1016/s0927-7757(00)00410-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Kobuke Y, Nagatani T. A Supramolecular Ion Channel Based on Amphiphilic Cholic Acid Derivatives. CHEM LETT 2000. [DOI: 10.1246/cl.2000.298] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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