1
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Morris DTJ, Clayden J. Screw sense and screw sensibility: communicating information by conformational switching in helical oligomers. Chem Soc Rev 2023; 52:2480-2496. [PMID: 36928473 PMCID: PMC10068589 DOI: 10.1039/d2cs00982j] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Indexed: 03/18/2023]
Abstract
Biological systems have evolved a number of different strategies to communicate information on the molecular scale. Among these, the propagation of conformational change is among the most important, being the means by which G-protein coupled receptors (GPCRs) use extracellular signals to modulate intracellular processes, and the way that opsin proteins translate light signals into nerve impulses. The developing field of foldamer chemistry has allowed chemists to employ conformationally well-defined synthetic structures likewise to mediate information transfer, making use of mechanisms that are not found in biological contexts. In this review, we discuss the use of switchable screw-sense preference as a communication mechanism. We discuss the requirements for functional communication devices, and show how dynamic helical foldamers derived from the achiral monomers such as α-aminoisobutyric acid (Aib) and meso-cyclohexane-1,2-diamine fulfil them by communicating information in the form of switchable screw-sense preference. We describe the various stimuli that can be used to switch screw sense, and explore the way that propagation of the resulting conformational preference in a well-defined helical molecule allows screw sense to control chemical events remote from a source of information. We describe the operation of these conformational switches in the membrane phase, and outline the progress that has been made towards using conformational switching to communicate between the exterior and interior of a phospholipid vesicle.
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Affiliation(s)
- David T J Morris
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
| | - Jonathan Clayden
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
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2
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Zhang L, Lin S, Li Y, Li B, Yang Y. Ala–Ala dipeptides with a semi-perfluoroalkyl chain: chirality driven molecular packing difference and self-assembly driven chiral transfer. NEW J CHEM 2021. [DOI: 10.1039/d0nj05676f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The chirality of amino acids triggered the chiral molecular stacking of dipeptides and, eventually, transferred to the semi-perfluoroalkyl chain.
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Affiliation(s)
- Lianglin Zhang
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Shuwei Lin
- Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China
- School of Optoelectronics Science and Engineering
- Soochow University
- Suzhou 215123
- China
| | - Yi Li
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Baozong Li
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Yonggang Yang
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
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3
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Rajappan SC, McCarthy DR, Campbell JP, Ferrell JB, Sharafi M, Ambrozaite O, Li J, Schneebeli ST. Selective Monofunctionalization Enabled by Reaction-History-Dependent Communication in Catalytic Rotaxanes. Angew Chem Int Ed Engl 2020; 59:16668-16674. [PMID: 32525593 DOI: 10.1002/anie.202006305] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Indexed: 12/24/2022]
Abstract
Selective monofunctionalization of substrates with distant, yet equally reactive functional groups is difficult to achieve, as it requires the second functional group to selectively modulate its reactivity once the first functional group has reacted. We now show that mechanically interlocked catalytic rings can effectively regulate the reactivity of stoppering groups in rotaxanes over a distance of about 2 nm. Our mechanism of communication is enabled by a unique interlocked design, which effectively removes the catalytic rings from the substrates by fast dethreading as soon as the first reaction has taken place. Our method not only led to a rare example of selective monofunctionalization, but also to a "molecular if function". Overall, the study presents a way to get distant functional groups to communicate with each other in a reaction-history-dependent manner by creating linkers that can ultimately perform logical operations at the molecular level.
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Affiliation(s)
- Sinu C Rajappan
- Department of Chemistry, University of Vermont, Burlington, VT, 05405, USA
| | - Dillon R McCarthy
- Department of Chemistry, University of Vermont, Burlington, VT, 05405, USA
| | - Joseph P Campbell
- Department of Chemistry, University of Vermont, Burlington, VT, 05405, USA
| | - Jonathon B Ferrell
- Department of Chemistry, University of Vermont, Burlington, VT, 05405, USA
| | - Mona Sharafi
- Department of Chemistry, University of Vermont, Burlington, VT, 05405, USA
| | - Ona Ambrozaite
- Department of Chemistry, University of Vermont, Burlington, VT, 05405, USA
| | - Jianing Li
- Department of Chemistry, University of Vermont, Burlington, VT, 05405, USA
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4
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Rajappan SC, McCarthy DR, Campbell JP, Ferrell JB, Sharafi M, Ambrozaite O, Li J, Schneebeli ST. Selective Monofunctionalization Enabled by Reaction‐History‐Dependent Communication in Catalytic Rotaxanes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202006305] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sinu C. Rajappan
- Department of Chemistry University of Vermont Burlington VT 05405 USA
| | | | | | | | - Mona Sharafi
- Department of Chemistry University of Vermont Burlington VT 05405 USA
| | - Ona Ambrozaite
- Department of Chemistry University of Vermont Burlington VT 05405 USA
| | - Jianing Li
- Department of Chemistry University of Vermont Burlington VT 05405 USA
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5
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Fernández Z, Fernández B, Quiñoá E, Riguera R, Freire F. Chiral information harvesting in helical poly(acetylene) derivatives using oligo( p-phenyleneethynylene)s as spacers. Chem Sci 2020; 11:7182-7187. [PMID: 34123003 PMCID: PMC8159296 DOI: 10.1039/d0sc02685a] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 06/16/2020] [Indexed: 01/20/2023] Open
Abstract
A chiral harvesting transmission mechanism is described in poly(acetylene)s bearing oligo(p-phenyleneethynylene)s (OPEs) used as rigid achiral spacers and derivatized with chiral pendant groups. The chiral moieties induce a positive or negative tilting degree in the stacking of OPE units along the polymer structure, which is further harvested by the polyene backbone adopting either a P or M helix.
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Affiliation(s)
- Zulema Fernández
- Centro Singular de investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela E-15782 Santiago de Compostela Spain
| | - Berta Fernández
- Departamento de Química Física, Universidade de Santiago de Compostela E-15782 Santiago de Compostela Spain
| | - Emilio Quiñoá
- Centro Singular de investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela E-15782 Santiago de Compostela Spain
| | - Ricardo Riguera
- Centro Singular de investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela E-15782 Santiago de Compostela Spain
| | - Félix Freire
- Centro Singular de investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela E-15782 Santiago de Compostela Spain
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6
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Zhang L, Lin S, Tong Q, Li Y, Wang Y, Li Y, Li B, Yang Y. Helicity of perfluoroalkyl chains controlled by the self-assembly of the Ala-Ala dipeptides. Chirality 2019; 31:992-1000. [PMID: 31468590 DOI: 10.1002/chir.23130] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Revised: 07/26/2019] [Accepted: 08/12/2019] [Indexed: 01/04/2023]
Abstract
Four Ala-Ala dipeptides with a perfluoroalkyl chain at the N-terminal were synthesized. They were able to self-assemble into helical nanofibers and/or twisted nanobelts in a mixture of DMSO/H2 O. The handedness of nanofibers and nanobelts was controlled by the chirality of the alanine at the N-terminal. The stacking handedness of the phenylene groups and the helicity of the perfluoroalkyl chain were studied using circular dichroism spectroscopy and vibrational circular dichroism, respectively. The chirality of the alanine at N-terminal controlled the stacking handedness of the neighboring phenylene groups. Moreover, due to the low potential barrier between M- and P-helices of the perfluorocarbon chain, the handedness of the organic self-assemblies eventually controlled the helicity of the perfluorocarbon chain. X-ray diffraction indicated that a lamellar structure was formed by the dimers of the dipeptides.
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Affiliation(s)
- Lianglin Zhang
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, China
| | - Shuwei Lin
- Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China, School of Optoelectronics Science and Engineering & Collaborative Innovation, Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, China
| | - Qiyun Tong
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, China
| | - Yan Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, China
| | - Yong Wang
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, China
| | - Yi Li
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, China
| | - Baozong Li
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, China
| | - Yonggang Yang
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, China
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7
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Abstract
Allosteric interactions in DNA are crucial for various biological processes. These interactions are quantified by measuring the change in free energy as a function of the distance between the binding sites for two ligands. Here, we show that trends in the interaction energy of ligands binding to DNA can be explained within an elastic birod model, which accounts for the deformation of each strand as well as the change in stacking energy due to perturbations in position and orientation of the bases caused by the binding of ligands. The strain fields produced by the ligands decay with distance from the binding site. The interaction energy of two ligands decays exponentially with the distance between them and oscillates with the periodicity of the double helix in quantitative agreement with experimental measurements. The trend in the computed interaction energy is similar to that in the perturbation of groove width produced by the binding of a single ligand, which is consistent with molecular simulations. Our analysis provides a new framework to understand allosteric interactions in DNA and can be extended to other rod-like macromolecules whose elasticity plays a role in biological functions.
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Affiliation(s)
- Jaspreet Singh
- Department of Mechanical Engineering and Applied Mechanics , University of Pennsylvania , Philadelphia , Pennsylvania 19104 , United States
| | - Prashant K Purohit
- Department of Mechanical Engineering and Applied Mechanics , University of Pennsylvania , Philadelphia , Pennsylvania 19104 , United States
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8
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Enhancing Aromatic Foldamer Helix Dynamics to Probe Interactions with Protein Surfaces. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800855] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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9
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Gratzer K, Diemer V, Clayden J. Signal transduction in oligoamide foldamers by selective non-covalent binding of chiral phosphates at a urea binding site. Org Biomol Chem 2018; 15:3585-3589. [PMID: 28397923 DOI: 10.1039/c7ob00660h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The transduction of biological signals depends on the spatial communication of conformational change. We report a synthetic mimic of this signal transduction process in which non-covalent binding induces a change in the position of equilibrium between two rapidly interconverting screw-sense conformers of a synthetic helical polyamide. Selectivity was achieved by incorporating at the N-terminus of the polyamide a urea-based anion recognition site capable of binding chiral phosphate anions. As a result of solvent-dependent binding, an induced conformational change propagates from the binding site through the amide chain, leading to a screw-sense preference detectable in the form of a chemical shift separation between two NMR active 13C labels. The remote induction of screw sense preference indicates successful communication of a signal originating solely from non-covalent binding.
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Affiliation(s)
- Katharina Gratzer
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK.
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10
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Miyagi Y, Otaki Y, Takahashi Y, Sanda F. Synthesis of novel optically active poly(thiophenyleneethynylenephenylene)s. Effects of chirality competition and cooperation at the side chains on higher order structures. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.09.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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11
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Rudzińska-Szostak E, Berlicki Ł. Sequence Engineering to Control the Helix Handedness of Peptide Foldamers. Chemistry 2017; 23:14980-14986. [DOI: 10.1002/chem.201702730] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Indexed: 12/21/2022]
Affiliation(s)
- Ewa Rudzińska-Szostak
- Department of Bioorganic Chemistry; Faculty of Chemistry; Wrocław University of Science and Technology; Wyb. Wyspiańskiego 27 50-370 Wrocław Poland
| | - Łukasz Berlicki
- Department of Bioorganic Chemistry; Faculty of Chemistry; Wrocław University of Science and Technology; Wyb. Wyspiańskiego 27 50-370 Wrocław Poland
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12
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Deike S, Binder WH. Induction of Chirality in β-Turn Mimetic Polymer Conjugates via Postpolymerization “Click” Coupling. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00343] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stefanie Deike
- Institute of Chemistry, Chair
of Macromolecular Chemistry, Faculty of Natural Sciences II, Martin Luther University Halle-Wittenberg, D-06120 Halle (Saale), Germany
| | - Wolfgang H. Binder
- Institute of Chemistry, Chair
of Macromolecular Chemistry, Faculty of Natural Sciences II, Martin Luther University Halle-Wittenberg, D-06120 Halle (Saale), Germany
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13
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Cho J, Ishida Y, Aida T. Helical Oligopeptides of a Quaternized Amino Acid with Tunable Chiral-Induction Ability and an Anomalous pH Response. Chemistry 2017; 23:4818-4826. [DOI: 10.1002/chem.201605460] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Indexed: 12/12/2022]
Affiliation(s)
- Joonil Cho
- Department of Chemistry and Biotechnology; School of Engineering; The University of Tokyo; 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
- Emergent Bioinspired Soft Matter Research Team; Center for Emergent Matter Science; RIKEN; 2-1 Hirosawa, Wako Saitama 351-0198 Japan
| | - Yasuhiro Ishida
- Emergent Bioinspired Soft Matter Research Team; Center for Emergent Matter Science; RIKEN; 2-1 Hirosawa, Wako Saitama 351-0198 Japan
| | - Takuzo Aida
- Department of Chemistry and Biotechnology; School of Engineering; The University of Tokyo; 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
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14
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15
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Tomsett M, Maffucci I, Le Bailly BAF, Byrne L, Bijvoets SM, Lizio MG, Raftery J, Butts CP, Webb SJ, Contini A, Clayden J. A tendril perversion in a helical oligomer: trapping and characterizing a mobile screw-sense reversal. Chem Sci 2017; 8:3007-3018. [PMID: 28451368 PMCID: PMC5380885 DOI: 10.1039/c6sc05474a] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Accepted: 01/24/2017] [Indexed: 11/21/2022] Open
Abstract
Helical oligomers of achiral monomers adopt domains of uniform screw sense, which are occasionally interrupted by screw-sense reversals. These rare, elusive, and fast-moving features have eluded detailed characterization. We now describe the structure and habits of a screw-sense reversal trapped within a fragment of a helical oligoamide foldamer of the achiral quaternary amino acid 2-aminoisobutyric acid (Aib). The reversal was enforced by compelling the amide oligomer to adopt a right-handed screw sense at one end and a left-handed screw sense at the other. The trapped reversal was characterized by X-ray crystallography, and its dynamic properties were monitored by NMR and circular dichroism, and modelled computationally. Raman spectroscopy indicated that a predominantly helical architecture was maintained despite the reversal. NMR and computational results indicated a stepwise shift from one screw sense to another on moving along the helical chain, indicating that in solution the reversal is not localised at a specific location, but is free to migrate across a number of residues. Analogous unconstrained screw-sense reversals that are free to move within a helical structure are likely to provide the mechanism by which comparable helical polymers and foldamers undergo screw-sense inversion.
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Affiliation(s)
- Michael Tomsett
- School of Chemistry , University of Bristol , Cantock's Close , Bristol BS8 1TS , UK .
| | - Irene Maffucci
- Dipartimento di Scienze Farmaceutiche - Sezione di Chimica Generale e Organica "Alessandro Marchesini" , Università degli Studi di Milano , Via Venezian , 21 20133 Milano , Italy
| | - Bryden A F Le Bailly
- School of Chemistry , University of Bristol , Cantock's Close , Bristol BS8 1TS , UK .
| | - Liam Byrne
- School of Chemistry , University of Manchester , Oxford Road , Manchester M13 9PL , UK
| | - Stefan M Bijvoets
- School of Chemistry , University of Manchester , Oxford Road , Manchester M13 9PL , UK
| | - M Giovanna Lizio
- School of Chemistry , University of Manchester , Oxford Road , Manchester M13 9PL , UK.,Manchester Institute of Biotechnology , University of Manchester , 131 Princess St , Manchester M1 7DN , UK
| | - James Raftery
- School of Chemistry , University of Manchester , Oxford Road , Manchester M13 9PL , UK
| | - Craig P Butts
- School of Chemistry , University of Bristol , Cantock's Close , Bristol BS8 1TS , UK .
| | - Simon J Webb
- School of Chemistry , University of Manchester , Oxford Road , Manchester M13 9PL , UK.,Manchester Institute of Biotechnology , University of Manchester , 131 Princess St , Manchester M1 7DN , UK
| | - Alessandro Contini
- Dipartimento di Scienze Farmaceutiche - Sezione di Chimica Generale e Organica "Alessandro Marchesini" , Università degli Studi di Milano , Via Venezian , 21 20133 Milano , Italy
| | - Jonathan Clayden
- School of Chemistry , University of Bristol , Cantock's Close , Bristol BS8 1TS , UK .
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16
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Liu Z, Hu X, Abramyan AM, Mészáros Á, Csékei M, Kotschy A, Huc I, Pophristic V. Computational Prediction and Rationalization, and Experimental Validation of Handedness Induction in Helical Aromatic Oligoamide Foldamers. Chemistry 2017; 23:3605-3615. [DOI: 10.1002/chem.201605082] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Zhiwei Liu
- Department of Chemistry & Biochemistry University of the Sciences 600 South 43rd Street Philadelphia PA 19104 USA
| | - Xiaobo Hu
- University of Bordeaux, CBMN (UMR 5248) Institut Européen de Chimie et Biologie 2 rue Escarpit 33600 Pessac France
- CNRS, CBMN (UMR 5248) France
- Bordeaux Institut National Polytechnique CBMN (UMR 5248) France
| | - Ara M. Abramyan
- Department of Chemistry & Biochemistry University of the Sciences 600 South 43rd Street Philadelphia PA 19104 USA
| | - Ádám Mészáros
- Servier Research Institute of Medicinal Chemistry Záhony utca 7. 1031 Budapest Hungary
| | - Márton Csékei
- Servier Research Institute of Medicinal Chemistry Záhony utca 7. 1031 Budapest Hungary
| | - András Kotschy
- Servier Research Institute of Medicinal Chemistry Záhony utca 7. 1031 Budapest Hungary
| | - Ivan Huc
- University of Bordeaux, CBMN (UMR 5248) Institut Européen de Chimie et Biologie 2 rue Escarpit 33600 Pessac France
- CNRS, CBMN (UMR 5248) France
- Bordeaux Institut National Polytechnique CBMN (UMR 5248) France
| | - Vojislava Pophristic
- Department of Chemistry & Biochemistry University of the Sciences 600 South 43rd Street Philadelphia PA 19104 USA
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17
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Abstract
Foldamers can be made more than pieces of static, conformationally uniform molecular architecture by designing into their structure the conformational dynamism characteristic of functional molecular machines. We show that these dynamic foldamers display biomimetic properties reminiscent of allosteric proteins and receptor molecules. They can translate chemical signals into conformational changes, and hence into chemical outputs such as control of reactivity and selectivity. Future developments could see dynamic foldamers operating in the membrane phase providing artificial mechanisms for communication and control that integrate synthetic chemistry into synthetic biology.
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Affiliation(s)
- Bryden A F Le Bailly
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK.
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18
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Maeda K, Miyagawa T, Furuko A, Onouchi H, Yashima E. Dual Memory of Enantiomeric Helices in Poly(phenylacetylene)s Induced by a Single Enantiomer through Helix Inversion and Dual Storage of the Enantiomeric Helicity Memories. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01269] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Katsuhiro Maeda
- Department
of Molecular Design
and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Toyoharu Miyagawa
- Department
of Molecular Design
and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Akira Furuko
- Department
of Molecular Design
and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Hisanari Onouchi
- Department
of Molecular Design
and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Eiji Yashima
- Department
of Molecular Design
and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
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19
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Brioche J, Pike S, Tshepelevitsh S, Leito I, Morris GA, Webb SJ, Clayden J. Conformational Switching of a Foldamer in a Multicomponent System by pH-Filtered Selection between Competing Noncovalent Interactions. J Am Chem Soc 2015; 137:6680-91. [PMID: 25915163 PMCID: PMC4520694 DOI: 10.1021/jacs.5b03284] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Indexed: 12/26/2022]
Abstract
Biomolecular systems are able to respond to their chemical environment through reversible, selective, noncovalent intermolecular interactions. Typically, these interactions induce conformational changes that initiate a signaling cascade, allowing the regulation of biochemical pathways. In this work, we describe an artificial molecular system that mimics this ability to translate selective noncovalent interactions into reversible conformational changes. An achiral but helical foldamer carrying a basic binding site interacts selectively with the most acidic member of a suite of chiral ligands. As a consequence of this noncovalent interaction, a global absolute screw sense preference, detectable by (13)C NMR, is induced in the foldamer. Addition of base, or acid, to the mixture of ligands competitively modulates their interaction with the binding site, and reversibly switches the foldamer chain between its left and right-handed conformations. As a result, the foldamer-ligand mixture behaves as a biomimetic chemical system with emergent properties, functioning as a "proton-counting" molecular device capable of providing a tunable, pH-dependent conformational response to its environment.
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Affiliation(s)
- Julien Brioche
- School
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United
Kingdom
| | - Sarah
J. Pike
- School
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United
Kingdom
| | - Sofja Tshepelevitsh
- Institute
of Chemistry, University of Tartu, Ravila 14a, Tartu 50411, Estonia
| | - Ivo Leito
- Institute
of Chemistry, University of Tartu, Ravila 14a, Tartu 50411, Estonia
| | - Gareth A. Morris
- School
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United
Kingdom
| | - Simon J. Webb
- School
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United
Kingdom
- Manchester
Institute of Biotechnology, University of
Manchester, 131 Princess
Street, Manchester M1 7DN, United Kingdom
| | - Jonathan Clayden
- School
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United
Kingdom
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20
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Le Bailly BAF, Clayden J. Controlling the sign and magnitude of screw-sense preference from the C-terminus of an achiral helical foldamer. Chem Commun (Camb) 2015; 50:7949-52. [PMID: 24918692 DOI: 10.1039/c4cc03261f] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The global screw-sense preference of an achiral helical oligomer may be controlled by a single chiral monomer located at one terminus. Remarkably, maximal control is induced in oligomers of the achiral quaternary amino acid Aib by a single C-terminal alaninamide residue, probably because the Ala side chain, though small, is compatible with a 310 helical conformation. The presence or absence of a C-terminal hydrogen bond donor determines the screw sense of the entire oligomer.
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Affiliation(s)
- Bryden A F Le Bailly
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK.
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21
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Le Bailly BAF, Byrne L, Diemer V, Foroozandeh M, Morris GA, Clayden J. Flaws in foldamers: conformational uniformity and signal decay in achiral helical peptide oligomers. Chem Sci 2015; 6:2313-2322. [PMID: 29308146 PMCID: PMC5645781 DOI: 10.1039/c4sc03944k] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Accepted: 01/19/2015] [Indexed: 11/21/2022] Open
Abstract
Although foldamers, by definition, are extended molecular structures with a well-defined conformation, minor conformers must be populated at least to some extent in solution. We present a quantitative analysis of these minor conformers for a series of helical oligomers built from achiral but helicogenic α-amino acids. By measuring the chain length dependence or chain position dependence of NMR or CD quantities that measure screw-sense preference in a helical oligomer, we quantify values for the decay constant of a conformational signal as it passes through the molecular structure. This conformational signal is a perturbation of the racemic mixture of M and P helices that such oligomers typically adopt by the inclusion of an N or C terminal chiral inducer. We show that decay constants may be very low (<1% signal loss per residue) in non-polar solvents, and we evaluate the increase in decay constant that results in polar solvents, at higher temperatures, and with more conformationally flexible residues such as Gly. Decay constants are independent of whether the signal originates from the N or the C terminus. By interpreting the decay constant in terms of the probability with which conformations containing a screw-sense reversal are populated, we quantify the populations of these alternative minor conformers within the overall ensemble of secondary structures adopted by the foldamer. We deduce helical persistence lengths for Aib polymers that allow us to show that in a non-polar solvent a peptide helix, even in the absence of chiral residues, may continue with the same screw sense for approximately 200 residues.
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Affiliation(s)
- Bryden A F Le Bailly
- School of Chemistry , University of Manchester , Oxford Road , Manchester M13 9PL , UK .
| | - Liam Byrne
- School of Chemistry , University of Manchester , Oxford Road , Manchester M13 9PL , UK .
| | - Vincent Diemer
- School of Chemistry , University of Manchester , Oxford Road , Manchester M13 9PL , UK .
| | | | - Gareth A Morris
- School of Chemistry , University of Manchester , Oxford Road , Manchester M13 9PL , UK .
| | - Jonathan Clayden
- School of Chemistry , University of Manchester , Oxford Road , Manchester M13 9PL , UK .
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22
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Sogawa H, Terada K, Miyagi Y, Shiotsuki M, Inai Y, Masuda T, Sanda F. Photoinduced Formation of an Azobenzene-Based CD-Active Supramolecular Cyclic Dimer. Chemistry 2015; 21:6747-55. [DOI: 10.1002/chem.201406054] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Indexed: 11/10/2022]
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23
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Crisma M, De Zotti M, Formaggio F, Peggion C, Moretto A, Toniolo C. Handedness preference and switching of peptide helices. Part II: Helices based on noncodedα-amino acids. J Pept Sci 2015; 21:148-77. [DOI: 10.1002/psc.2743] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Revised: 12/19/2014] [Accepted: 12/19/2014] [Indexed: 12/27/2022]
Affiliation(s)
| | - Marta De Zotti
- Department of Chemistry; University of Padova; Padova Italy
| | - Fernando Formaggio
- ICB; Padova Unit; CNR Padova Italy
- Department of Chemistry; University of Padova; Padova Italy
| | | | - Alessandro Moretto
- ICB; Padova Unit; CNR Padova Italy
- Department of Chemistry; University of Padova; Padova Italy
| | - Claudio Toniolo
- ICB; Padova Unit; CNR Padova Italy
- Department of Chemistry; University of Padova; Padova Italy
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24
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Pike SJ, Boddaert T, Raftery J, Webb SJ, Clayden J. Participation of non-aminoisobutyric acid (Aib) residues in the 310 helical conformation of Aib-rich foldamers: a solid state study. NEW J CHEM 2015. [DOI: 10.1039/c4nj01547a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
310 helical conformations that extend over 21 Å result when selected non-Aib terminal and central residues are incorporated into Aib-rich foldamers.
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Affiliation(s)
- Sarah J. Pike
- School of Chemistry
- University of Manchester
- Manchester
- UK
| | | | - James Raftery
- School of Chemistry
- University of Manchester
- Manchester
- UK
| | - Simon J. Webb
- School of Chemistry
- University of Manchester
- Manchester
- UK
- Manchester Institute of Biotechnology
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25
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Byrne L, Solà J, Clayden J. Screw sense alone can govern enantioselective extension of a helical peptide by kinetic resolution of a racemic amino acid. Chem Commun (Camb) 2015; 51:10965-8. [DOI: 10.1039/c5cc01790d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Helical secondary structure alone, even in the absence of local chiral residues, can direct the enantioselectivity of peptide coupling.
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Affiliation(s)
- Liam Byrne
- School of Chemistry
- University of Manchester
- Manchester M13 9PL
- UK
| | - Jordi Solà
- School of Chemistry
- University of Manchester
- Manchester M13 9PL
- UK
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26
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Suzuki Y, Miyagi Y, Shiotsuki M, Inai Y, Masuda T, Sanda F. Synthesis and helical structures of poly(ω-alkynamide)s having chiral side chains: effect of solvent on their screw-sense inversion. Chemistry 2014; 20:15131-43. [PMID: 25264082 DOI: 10.1002/chem.201402628] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Indexed: 11/06/2022]
Abstract
New ω-alkynamides, (S)-HC≡CCH2CONHCH2CH(CH3)CH2CH3 (1) and (S)-HC≡CCH2CH2CONHCH(CH3)CH2CH2CH2CH2CH3 (2) were synthesized and polymerized with a rhodium catalyst in CHCl3 to obtain cis-stereoregular poly(ω-alkynamide)s (poly(1) and poly(2)). Polarimetric, CD, and IR spectroscopic studies revealed that in solution the polymers adopted predominantly one-handed helical structures stabilized by intramolecular hydrogen bonds between the pendent amide groups. This behavior was similar to that of the corresponding poly(N-alkynylamide) counterparts (poly(3) and poly(4)) reported previously, whereas the helical senses were opposite to each other. The helical structures of the poly(ω-alkynamide)s were stable upon heating similar to those of the poly(N-alkynylamide)s, but the solvent response was completely different. An increase in MeOH content in CHCl3/MeOH resulted in inversion of the predominant screw-sense for poly(1) and poly(2). Conversely, poly(3) was transformed into a random coil, and poly(4) maintained the predominant screw-sense irrespective of MeOH content. The solvent dependence of predominant screw-sense for poly(1) and poly(2) was reasonably explained by molecular orbital studies using the conductor-like screening model (COSMO).
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Affiliation(s)
- Yuji Suzuki
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura Campus, Nishikyo-ku, Kyoto 615-8510 (Japan)
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27
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Wechsel R, Maury J, Fremaux J, France SP, Guichard G, Clayden J. Inducing achiral aliphatic oligoureas to fold into helical conformations. Chem Commun (Camb) 2014; 50:15006-9. [DOI: 10.1039/c4cc06754a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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28
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Pike SJ, Diemer V, Raftery J, Webb SJ, Clayden J. Designing foldamer-foldamer interactions in solution: the roles of helix length and terminus functionality in promoting the self-association of aminoisobutyric acid oligomers. Chemistry 2014; 20:15981-90. [PMID: 25280242 DOI: 10.1002/chem.201403626] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Indexed: 12/11/2022]
Abstract
The biological activity of antibiotic peptaibols has been linked to their ability to aggregate, but the structure-activity relationship for aggregation is not well understood. Herein, we report a systematic study of a class of synthetic helical oligomer (foldamer) composed of aminoisobutyric acid (Aib) residues, which mimic the folding behavior of peptaibols. NMR spectroscopic analysis was used to quantify the dimerization constants in solution, which showed hydrogen-bond donors at the N terminus promoted aggregation more effectively than similar modifications at the C terminus. Elongation of the peptide chain also favored aggregation. The geometry of aggregation in solution was investigated by means of titrations with [D6]DMSO and 2D NOE NMR spectroscopy, which allowed the NH protons most involved in intermolecular hydrogen bonds in solution to be identified. X-ray crystallography studies of two oligomers allowed a comparison of the inter- and intramolecular hydrogen-bonding interactions in the solid state and in solution and gave further insight into the geometry of foldamer-foldamer interactions. These solution-based and solid-state studies indicated that the preferred geometry for aggregation is through head-to-tail interactions between the N and C termini of adjacent Aib oligomers.
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Affiliation(s)
- Sarah J Pike
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL (UK), Fax: (+44) 161-275-4939
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29
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Yao L, Lu X, Chen S, Watkins JJ. Formation of Helical Phases in Achiral Block Copolymers by Simple Addition of Small Chiral Additives. Macromolecules 2014. [DOI: 10.1021/ma501714g] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Li Yao
- Department
of Polymer Science and Engineering, University of Massachusetts Amherst, 120 Governors Drive, Amherst, Massachusetts 01003, United States
| | - Xuemin Lu
- Department
of Polymer Science and Engineering, University of Massachusetts Amherst, 120 Governors Drive, Amherst, Massachusetts 01003, United States
- School
of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai 200240, P. R. China
| | - Shuangshuang Chen
- School
of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai 200240, P. R. China
| | - James J. Watkins
- Department
of Polymer Science and Engineering, University of Massachusetts Amherst, 120 Governors Drive, Amherst, Massachusetts 01003, United States
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30
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Sista P, Ghosh K, Martinez JS, Rocha RC. Metallo-Biopolymers: Conjugation Strategies and Applications. POLYM REV 2014. [DOI: 10.1080/15583724.2014.913063] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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31
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De Poli M, Byrne L, Brown RA, Solà J, Castellanos A, Boddaert T, Wechsel R, Beadle JD, Clayden J. Engineering the Structure of an N-Terminal β-Turn To Maximize Screw-Sense Preference in Achiral Helical Peptide Chains. J Org Chem 2014; 79:4659-75. [DOI: 10.1021/jo500714b] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Matteo De Poli
- School
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Liam Byrne
- School
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Robert A. Brown
- School
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Jordi Solà
- School
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | | | - Thomas Boddaert
- School
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Romina Wechsel
- School
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Jonathan D. Beadle
- School
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Jonathan Clayden
- School
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
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32
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Byrne L, Solà J, Boddaert T, Marcelli T, Adams RW, Morris GA, Clayden J. Foldamer-Mediated Remote Stereocontrol: >1,60 Asymmetric Induction. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201308264] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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33
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Byrne L, Solà J, Boddaert T, Marcelli T, Adams RW, Morris GA, Clayden J. Foldamer-Mediated Remote Stereocontrol: >1,60 Asymmetric Induction. Angew Chem Int Ed Engl 2013; 53:151-5. [DOI: 10.1002/anie.201308264] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Indexed: 11/11/2022]
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34
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Sogawa H, Shiotsuki M, Hirao T, Haino T, Sanda F. Synthesis of Optically Active Poly(m-phenyleneethynylene–aryleneethynylene)s Bearing Hydroxy Groups and Examination of the Higher Order Structures. Macromolecules 2013. [DOI: 10.1021/ma4017295] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hiromitsu Sogawa
- Department of Polymer Chemistry, Graduate
School of Engineering, Kyoto University, Katsura
Campus, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Masashi Shiotsuki
- Molecular
Engineering Institute, Kinki University, Kayanomori, Iizuka, Fukuoka 820-8555, Japan
| | - Takehiro Hirao
- Graduate
School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
| | - Takeharu Haino
- Graduate
School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
| | - Fumio Sanda
- Department
of Chemistry and Materials Engineering, Faculty of Chemistry, Materials
and Bioengineering, Kansai University, 3-3-35 Yamate-cho, Suita, Osaka 564-8680, Japan
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35
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Orcel U, De Poli M, De Zotti M, Clayden J. The N-Terminal Nonapeptide of Cephaibols A and C: A Naturally Occurring Example of Mismatched Helical Screw-Sense Control. Chemistry 2013; 19:16357-65. [DOI: 10.1002/chem.201302648] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Indexed: 12/14/2022]
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36
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End-to-end conformational communication through a synthetic purinergic receptor by ligand-induced helicity switching. Nat Chem 2013; 5:853-60. [PMID: 24056342 DOI: 10.1038/nchem.1747] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Accepted: 08/06/2013] [Indexed: 11/08/2022]
Abstract
The long-range communication of information, exemplified by signal transduction through membrane-bound receptors, is a central biochemical function. Reversible binding of a messenger ligand induces a local conformational change that is relayed through the receptor, inducing a chemical effect typically several nanometres from the binding site. We report a synthetic receptor mimic that transmits structural information from a boron-based ligand binding site to a spectroscopic reporter located more than 2 nm away. Reversible binding of a diol ligand to the N-terminal binding site induces a screw-sense preference in a helical oligo(aminoisobutyric acid) foldamer, which is relayed to a reporter group at the remote C-terminus, communicating information about the structure and stereochemistry of the ligand. The reversible nature of boronate esterification was exploited to switch the receptor sequentially between left- and right-handed helices, while the exquisite conformational sensitivity of the helical relay allowed the reporter to differentiate even between purine and pyrimidine nucleosides as ligands.
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37
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Ousaka N, Takeyama Y, Yashima E. Anion-Driven Reversible Switching of Metal-Centered Stereoisomers in Metallopeptides. Chemistry 2013; 19:4680-5. [DOI: 10.1002/chem.201300361] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Indexed: 11/09/2022]
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38
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Pike SJ, De Poli M, Zawodny W, Raftery J, Webb SJ, Clayden J. Diastereotopic fluorine substituents as 19F NMR probes of screw-sense preference in helical foldamers. Org Biomol Chem 2013; 11:3168-76. [DOI: 10.1039/c3ob40463c] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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39
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Sharma GVM, Kodeti SR, Dutta SK, Velaparthi S, Narsimulu K, Anjaiah G, Basha SJ, Kunwar AC. Chirality and Template-Mediated Induction of Helical Preferences in Achiral β-Peptides. Chemistry 2012; 18:16046-60. [DOI: 10.1002/chem.201201892] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Revised: 08/20/2012] [Indexed: 11/06/2022]
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40
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Ousaka N, Grunder S, Castilla AM, Whalley AC, Stoddart JF, Nitschke JR. Efficient long-range stereochemical communication and cooperative effects in self-assembled Fe4L6 cages. J Am Chem Soc 2012; 134:15528-37. [PMID: 22916838 DOI: 10.1021/ja306615d] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A series of large, optically active Fe(4)L(6) cages was prepared from linear 5,5'-bis(2-formylpyridines) incorporating varying numbers (n = 0-3) of oligo-p-xylene spacers, chiral amines, and Fe(II). When a cage was constructed from the ligand bridged by one p-xylene spacer (n = 1) and a bulky chiral amine, both a homochiral Fe(2)L(3) helicate and Fe(4)L(6) cage were observed to coexist in solution due to a delicate balance between steric factors. In contrast, when a less bulky chiral amine was used, only the Fe(4)L(6) cage was observed. In the case of larger cages (n = 2, 3), long-range (>2 nm) stereochemical coupling between metal centers was observed, which was minimally diminished as the ligands were lengthened. This communication was mediated by the ligands' geometries and rigidity, as opposed to gearing effects between xylene methyl groups: the metal-centered stereochemistry was not observed to affect the axial stereochemistry of the ligands.
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Affiliation(s)
- Naoki Ousaka
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
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41
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Demizu Y, Yabuki YU, Doi M, Sato Y, Tanaka M, Kurihara M. Conformations of helical Aib peptides containing a pair of l-amino acid and d-amino acid. J Pept Sci 2012; 18:466-75. [PMID: 22619002 DOI: 10.1002/psc.2418] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2012] [Revised: 04/18/2012] [Accepted: 04/20/2012] [Indexed: 11/06/2022]
Affiliation(s)
- Yosuke Demizu
- Division of Organic Chemistry; National Institute of Health Sciences; 1-18-1, Kamiyoga, Setagaya; Tokyo; 158-8501; Japan
| | - Yu-u Yabuki
- Division of Organic Chemistry; National Institute of Health Sciences; 1-18-1, Kamiyoga, Setagaya; Tokyo; 158-8501; Japan
| | - Mitsunobu Doi
- Osaka University of Pharmaceutical Sciences; Osaka; 569-1094; Japan
| | - Yukiko Sato
- Division of Organic Chemistry; National Institute of Health Sciences; 1-18-1, Kamiyoga, Setagaya; Tokyo; 158-8501; Japan
| | - Masakazu Tanaka
- Graduate School of Biomedical Sciences; Nagasaki University; 1-14 Bunkyo-machi; Nagasaki; 852-8521; Japan
| | - Masaaki Kurihara
- Division of Organic Chemistry; National Institute of Health Sciences; 1-18-1, Kamiyoga, Setagaya; Tokyo; 158-8501; Japan
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42
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Boddaert T, Solà J, Helliwell M, Clayden J. Chemical communication: conductors and insulators of screw-sense preference between helical oligo(aminoisobutyric acid) domains. Chem Commun (Camb) 2012; 48:3397-9. [PMID: 22363936 DOI: 10.1039/c2cc00060a] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
(1)H NMR studies quantify the abilities of achiral amino acids to communicate a left-handed screw-sense preference from one helical Aib(4) domain to another: certain quaternary amino acids (e.g. Ac(6)c) act as effective conductors of conformational preference while others (e.g. diphenylglycine) acts as insulators.
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Affiliation(s)
- Thomas Boddaert
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK
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43
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Brown RA, Marcelli T, De Poli M, Solà J, Clayden J. Induction of Unexpected Left-Handed Helicity by an N-Terminal L-Amino Acid in an Otherwise Achiral Peptide Chain. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201107583] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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44
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Brown RA, Marcelli T, De Poli M, Solà J, Clayden J. Induction of unexpected left-handed helicity by an N-terminal L-amino acid in an otherwise achiral peptide chain. Angew Chem Int Ed Engl 2012; 51:1395-9. [PMID: 22294355 DOI: 10.1002/anie.201107583] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2011] [Indexed: 11/06/2022]
Affiliation(s)
- Robert A Brown
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
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45
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46
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Chiral information harvesting in dendritic metallopeptides. Nat Chem 2011; 3:856-61. [DOI: 10.1038/nchem.1146] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2011] [Accepted: 08/12/2011] [Indexed: 01/29/2023]
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47
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Solà J, Morris GA, Clayden J. Measuring Screw-Sense Preference in a Helical Oligomer by Comparison of 13C NMR Signal Separation at Slow and Fast Exchange. J Am Chem Soc 2011; 133:3712-5. [DOI: 10.1021/ja1097034] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jordi Solà
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Gareth A. Morris
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Jonathan Clayden
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
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48
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Nanometer-Range Communication of Stereochemical Information by Reversible Switching of Molecular Helicity. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201001130] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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49
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Nanometer-Range Communication of Stereochemical Information by Reversible Switching of Molecular Helicity. Angew Chem Int Ed Engl 2010; 49:6836-9. [DOI: 10.1002/anie.201001130] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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50
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Solà J, Helliwell M, Clayden J. N- versus C-Terminal Control over the Screw-Sense Preference of the Configurationally Achiral, Conformationally Helical Peptide Motif Aib8GlyAib8. J Am Chem Soc 2010; 132:4548-9. [DOI: 10.1021/ja100662d] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Jordi Solà
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Madeleine Helliwell
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Jonathan Clayden
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
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