1
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Song G, Lee S, Jeong KS. Complexation-driven assembly of imine-linked helical receptors showing adaptive folding and temperature-dependent guest selection. Nat Commun 2024; 15:1501. [PMID: 38374171 PMCID: PMC10876968 DOI: 10.1038/s41467-024-45322-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 01/22/2024] [Indexed: 02/21/2024] Open
Abstract
The development of synthetic receptors capable of selectively binding guests with diverse structures and multiple functional groups poses a significant challenge. Here, we present the efficient assembly of foldamer-based receptors for monosaccharides, utilising the principles of complexation-induced equilibrium shifting and adaptive folding. Diimine 4 can be quantitatively assembled from smaller components when D-galactose is added as a guest among monosaccharides we examined. During this assembly, dual complexation-induced equilibrium shifts toward both the formation of diimine 4 and the conversion of D-galactose into α-D-galactofuranose are observed. Diimine 6 is quantitatively assembled in the presence of two different guests, methyl β-D-glucopyranoside and methyl β-D-galactopyranoside, resulting in the formation of two dimeric complexes: (6-MP)2⊃(methyl β-D-glucopyranoside)2 and (6-MM)2⊃(methyl β-D-galactopyranoside∙2H2O)2, respectively. These two complexes exhibit distinct folding structures with domain-swapping cavities depending on the bound guest and temperature. Interestingly, (6-MM)2⊃(methyl β-D-galactopyranoside∙2H2O)2 is exclusively formed at lower temperatures, while (6-MP)2⊃(methyl β-D-glucopyranoside)2 is only formed at higher temperatures.
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Affiliation(s)
- Geunmoo Song
- Department of Chemistry, Yonsei University, Seoul, 03722, South Korea
| | - Seungwon Lee
- Department of Chemistry, Yonsei University, Seoul, 03722, South Korea
| | - Kyu-Sung Jeong
- Department of Chemistry, Yonsei University, Seoul, 03722, South Korea.
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2
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Lago-Silva M, Fernández-Míguez M, Rodríguez R, Quiñoá E, Freire F. Stimuli-responsive synthetic helical polymers. Chem Soc Rev 2024; 53:793-852. [PMID: 38105704 DOI: 10.1039/d3cs00952a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
Synthetic dynamic helical polymers (supramolecular and covalent) and foldamers share the helix as a structural motif. Although the materials are different, these systems also share many structural properties, such as helix induction or conformational communication mechanisms. The introduction of stimuli responsive building blocks or monomer repeating units in these materials triggers conformational or structural changes, due to the presence/absence of the external stimulus, which are transmitted to the helix resulting in different effects, such as assymetry amplification, helix inversion or even changes in the helical scaffold (elongation, J/H helical aggregates). In this review, we show through selected examples how different stimuli (e.g., temperature, solvents, cations, anions, redox, chiral additives, pH or light) can alter the helical structures of dynamic helical polymers (covalent and supramolecular) and foldamers acting on the conformational composition or molecular structure of their components, which is also transmitted to the macromolecular helical structure.
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Affiliation(s)
- María Lago-Silva
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
| | - Manuel Fernández-Míguez
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
| | - Rafael Rodríguez
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
| | - Emilio Quiñoá
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and 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) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
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3
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Henriksen HC, Sowers AJ, Travis CR, Vulpis TD, Cope TA, Ouslander SK, Russell AF, Gagné MR, Pophristic V, Liu Z, Waters ML. Stimulus-Induced Relief of Intentionally Incorporated Frustration Drives Refolding of a Water-Soluble Biomimetic Foldamer. J Am Chem Soc 2023; 145:27672-27679. [PMID: 38054648 DOI: 10.1021/jacs.3c09883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
Frustrated, or nonoptimal, interactions have been proposed to be essential to a protein's ability to display responsive behavior such as allostery, conformational signaling, and signal transduction. However, the intentional incorporation of frustrated noncovalent interactions has not been explored as a design element in the field of dynamic foldamers. Here, we report the design, synthesis, characterization, and molecular dynamics simulations of the first dynamic water-soluble foldamer that, in response to a stimulus, exploits relief of frustration in its noncovalent network to structurally rearrange from a pleated to an intercalated columnar structure. Thus, relief of frustration provides the energetic driving force for structural rearrangement. This work represents a previously unexplored design element for the development of stimulus-responsive systems that has potential application to materials chemistry, synthetic biology, and molecular machines.
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Affiliation(s)
- Hanne C Henriksen
- Department of Chemistry, CB 3290, UNC Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Adam J Sowers
- Department of Chemistry, CB 3290, UNC Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Christopher R Travis
- Department of Chemistry, CB 3290, UNC Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Troy D Vulpis
- Department of Chemistry, CB 3290, UNC Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Thomas A Cope
- Department of Chemistry, CB 3290, UNC Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Sarah K Ouslander
- Department of Chemistry, CB 3290, UNC Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Alexander F Russell
- Department of Chemistry, CB 3290, UNC Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Michel R Gagné
- Department of Chemistry, CB 3290, UNC Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Vojislava Pophristic
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, New Jersey 08028-1701 , United States
| | - Zhiwei Liu
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, New Jersey 08028-1701 , United States
| | - Marcey L Waters
- Department of Chemistry, CB 3290, UNC Chapel Hill, Chapel Hill, North Carolina 27599, United States
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4
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Lin Q, Lan H, Ma C, Stendall RT, Shankland K, Musgrave RA, Horton PN, Baldauf C, Hofmann H, Butts CP, Müller MM, Cobb AJA. Crystal Structure and NMR of an α,δ-Peptide Foldamer Helix Shows Side-Chains are Well Placed for Bifunctional Catalysis: Application as a Minimalist Aldolase Mimic. ANGEWANDTE CHEMIE (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 135:e202305326. [PMID: 38516402 PMCID: PMC10952562 DOI: 10.1002/ange.202305326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Indexed: 03/23/2024]
Abstract
We report the first NMR and X-ray diffraction (XRD) structures of an unusual 13/11-helix (alternating i, i+1 {NH-O=C} and i, i+3 {C=O-H-N} H-bonds) formed by a heteromeric 1 : 1 sequence of α- and δ-amino acids, and demonstrate the application of this framework towards catalysis. Whilst intramolecular hydrogen bonds (IMHBs) are the clear driver of helix formation in this system, we also observe an apolar interaction between the ethyl residue of one δ-amino acid and the cyclohexyl group of the next δ-residue in the sequence that seems to stabilize one type of helix over another. To the best of our knowledge this type of additional stabilization leading to a specific helical preference has not been observed before. Critically, the helix type realized places the α-residue functionalities in positions proximal enough to engage in bifunctional catalysis as demonstrated in the application of our system as a minimalist aldolase mimic.
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Affiliation(s)
- Qi Lin
- Department of ChemistryKing's College London7 Trinity StreetLondonSE1 1DBUK
| | - Hao Lan
- School of ChemistryUniversity of BristolCantocks CloseBristolBS8 1TSUK
| | - Chunmiao Ma
- School of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan430074P. R. China
| | - Ryan T. Stendall
- Department of ChemistryKing's College London7 Trinity StreetLondonSE1 1DBUK
| | - Kenneth Shankland
- School of ChemistryFood and Pharmacy (SCFP)University of ReadingWhiteknights BerksReadingRG6 6ADUK
| | | | - Peter N. Horton
- EPSRC National Crystallography ServiceSchool of ChemistryUniversity of Southampton HighfieldSouthamptonSO17 1BJUK
| | - Carsten Baldauf
- Fritz-Haber-Institut der Max-Planck-GesellschaftFaradayweg 4–614195BerlinGermany
| | - Hans‐Jörg Hofmann
- Institut für BiochemieUniversität LeipzigBrüderstrasse 3404103LeipzigGermany
| | - Craig P. Butts
- School of ChemistryUniversity of BristolCantocks CloseBristolBS8 1TSUK
| | - Manuel M. Müller
- Department of ChemistryKing's College London7 Trinity StreetLondonSE1 1DBUK
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5
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Lin Q, Lan H, Ma C, Stendall RT, Shankland K, Musgrave RA, Horton PN, Baldauf C, Hofmann H, Butts CP, Müller MM, Cobb AJA. Crystal Structure and NMR of an α,δ-Peptide Foldamer Helix Shows Side-Chains are Well Placed for Bifunctional Catalysis: Application as a Minimalist Aldolase Mimic. Angew Chem Int Ed Engl 2023; 62:e202305326. [PMID: 37218617 PMCID: PMC10952276 DOI: 10.1002/anie.202305326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 05/17/2023] [Accepted: 05/22/2023] [Indexed: 05/24/2023]
Abstract
We report the first NMR and X-ray diffraction (XRD) structures of an unusual 13/11-helix (alternating i, i+1 {NH-O=C} and i, i+3 {C=O-H-N} H-bonds) formed by a heteromeric 1 : 1 sequence of α- and δ-amino acids, and demonstrate the application of this framework towards catalysis. Whilst intramolecular hydrogen bonds (IMHBs) are the clear driver of helix formation in this system, we also observe an apolar interaction between the ethyl residue of one δ-amino acid and the cyclohexyl group of the next δ-residue in the sequence that seems to stabilize one type of helix over another. To the best of our knowledge this type of additional stabilization leading to a specific helical preference has not been observed before. Critically, the helix type realized places the α-residue functionalities in positions proximal enough to engage in bifunctional catalysis as demonstrated in the application of our system as a minimalist aldolase mimic.
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Affiliation(s)
- Qi Lin
- Department of ChemistryKing's College London7 Trinity StreetLondonSE1 1DBUK
| | - Hao Lan
- School of ChemistryUniversity of BristolCantocks CloseBristolBS8 1TSUK
| | - Chunmiao Ma
- School of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan430074P. R. China
| | - Ryan T. Stendall
- Department of ChemistryKing's College London7 Trinity StreetLondonSE1 1DBUK
| | - Kenneth Shankland
- School of ChemistryFood and Pharmacy (SCFP)University of ReadingWhiteknights BerksReadingRG6 6ADUK
| | | | - Peter N. Horton
- EPSRC National Crystallography ServiceSchool of ChemistryUniversity of Southampton HighfieldSouthamptonSO17 1BJUK
| | - Carsten Baldauf
- Fritz-Haber-Institut der Max-Planck-GesellschaftFaradayweg 4–614195BerlinGermany
| | - Hans‐Jörg Hofmann
- Institut für BiochemieUniversität LeipzigBrüderstrasse 3404103LeipzigGermany
| | - Craig P. Butts
- School of ChemistryUniversity of BristolCantocks CloseBristolBS8 1TSUK
| | - Manuel M. Müller
- Department of ChemistryKing's College London7 Trinity StreetLondonSE1 1DBUK
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6
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Hayashi R, Tashiro S, Asakura M, Mitsui S, Shionoya M. Effector-dependent structural transformation of a crystalline framework with allosteric effects on molecular recognition ability. Nat Commun 2023; 14:4490. [PMID: 37563107 PMCID: PMC10415384 DOI: 10.1038/s41467-023-40091-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Accepted: 07/12/2023] [Indexed: 08/12/2023] Open
Abstract
Structurally flexible porous crystals that combine high regularity and stimuli responsiveness have received attracted attention in connection with natural allostery found in regulatory systems of activity and function in biological systems. Porous crystals with molecular recognition sites in the inner pores are particularly promising for achieving elaborate functional control, where the local binding of effectors triggers their distortion to propagate throughout the structure. Here we report that the structure of a porous molecular crystal can be allosterically controlled by local adsorption of effectors within low-symmetry nanochannels with multiple molecular recognition sites. The exchange of effectors at the allosteric site triggers diverse conversion of the framework structure in an effector-dependent manner. In conjunction with the structural conversion, it is also possible to switch the molecular affinity at different recognition sites. These results may provide a guideline for the development of supramolecular materials with flexible and highly-ordered three-dimensional structures for biological applications.
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Affiliation(s)
- Ryunosuke Hayashi
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Shohei Tashiro
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
| | - Masahiro Asakura
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Shinya Mitsui
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Mitsuhiko Shionoya
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
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7
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Lutolli A, Che M, Parks FC, Raghavachari K, Flood AH. Cooperativity in Photofoldamer Chloride Double Helices Turned On with Sequences and Solvents, Around with Guests, and Off with Light. J Org Chem 2023. [PMID: 37130263 DOI: 10.1021/acs.joc.3c00112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Photofoldamers are sequence-defined receptors capable of switching guest binding on and off. When two foldamer strands wrap around the guest into 2:1 double helical complexes, cooperativity emerges, and with it comes the possibility to switch cooperativity with light and other stimuli. We use lessons from nonswitchable sequence isomers of aryl-triazole foldamers to guide how to vary the sequence location of azobenzenes from the end (FEND) to the interior (FIN) and report their impact on the cooperative formation of 2:1 complexes with Cl-. This sequence change produces a 125-fold increase from anti-cooperative (α = 0.008) for FEND to non-cooperative with FIN (α = 1.0). Density functional theory (DFT) studies show greater H-bonding and a more relaxed double helix for FIN. The solvent and guest complement the synthetic designs. Use of acetonitrile to enhance solvophobicity further enhances cooperativity in FIN (α = 126) but lowers the difference in cooperativity between sequences. Surprisingly, the impact of the sequence on cooperativity is inverted when the guest size is increased from Cl- (3.4 Å) to BF4- (4.1 Å). While photoconversion of interior azobenzenes was poor, the cis-cis isomer forms 1:1 complexes around chloride consistent with switching cooperativity. The effect of the guest, solvent, and light on the double-helix cooperativity depends on the sequence.
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Affiliation(s)
- Alketa Lutolli
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Minwei Che
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Fred C Parks
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Krishnan Raghavachari
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Amar H Flood
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
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8
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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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9
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Manick AD, Li C, Antonetti E, Albalat M, Cotelle Y, Nava P, Dutasta JP, Chatelet B, Martinez A. Probing the Importance of Host Symmetry on Carbohydrate Recognition. Chemistry 2023; 29:e202203212. [PMID: 36563113 DOI: 10.1002/chem.202203212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Indexed: 12/24/2022]
Abstract
The design of molecular cages with low symmetry could allow for more specific tuning of their properties and better mimic the unsymmetrical and complex environment of protein pockets. However, the added value of lowering symmetry of molecular receptors has been rarely demonstrated. Herein, C3 - and C1 -symmetrical cages, presenting the same recognition sites, have been synthesized and investigated as hosts for carbohydrate recognition. Structurally related derivatives of glucose, galactose and mannose were found to have greater affinity to the receptor with the lowest symmetry than to their C3 -symmetrical analogue. According to the host cavity modelling, the C1 symmetry receptor exhibits a wider opening than its C3 -symmetrical counterpart, providing easier access and thus promoting guest proximity to binding sites. Moreover, our results show the high stereo- and substrate selectivity of the C1 symmetry cage with respect to its C3 counterpart in the recognition of sugars.
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Affiliation(s)
- Anne-Doriane Manick
- Aix Marseille Université, Centrale Marseille, CNRS, iSm2 UMR 7313, 13397, Marseille, France
| | - Chunyang Li
- School of Materials Science and Engineering, Sichuan University of Science & Engineering, Zigong, 643000, China.,Material Corrosion and Protection Key Laboratory of Sichuan Province, Sichuan University of Science & Engineering, Zigong, 643000, China
| | - Elise Antonetti
- Aix Marseille Université, Centrale Marseille, CNRS, iSm2 UMR 7313, 13397, Marseille, France
| | - Muriel Albalat
- Aix Marseille Université, Centrale Marseille, CNRS, iSm2 UMR 7313, 13397, Marseille, France
| | - Yoann Cotelle
- Aix Marseille Université, Centrale Marseille, CNRS, iSm2 UMR 7313, 13397, Marseille, France
| | - Paola Nava
- Aix Marseille Université, Centrale Marseille, CNRS, iSm2 UMR 7313, 13397, Marseille, France
| | - Jean-Pierre Dutasta
- ENSL, CNRS, Laboratoire de Chimie UMR 5182, 46 allée d'Italie, 69364, Lyon, France
| | - Bastien Chatelet
- Aix Marseille Université, Centrale Marseille, CNRS, iSm2 UMR 7313, 13397, Marseille, France
| | - Alexandre Martinez
- Aix Marseille Université, Centrale Marseille, CNRS, iSm2 UMR 7313, 13397, Marseille, France
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10
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Leibiger B, Stapf M, Mazik M. Cycloalkyl Groups as Building Blocks of Artificial Carbohydrate Receptors: Studies with Macrocycles Bearing Flexible Side-Arms. Molecules 2022; 27:7630. [PMID: 36364458 PMCID: PMC9654292 DOI: 10.3390/molecules27217630] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 10/26/2022] [Accepted: 10/28/2022] [Indexed: 09/29/2023] Open
Abstract
The cyclopentyl group was expected to act as a building block for artificial carbohydrate receptors and to participate in van der Waals contacts with the carbohydrate substrate in a similar way as observed for the pyrrolidine ring of proline in the crystal structures of protein-carbohydrate complexes. Systematic binding studies with a series of 1,3,5-trisubstituted 2,4,6-triethylbenzenes bearing various cycloalkyl groups as recognition units provided indications of the involvement of these groups in the complexation process and showed the influence of the ring size on the receptor efficiency. Representatives of compounds that exhibit a macrocyclic backbone and flexible side arms were now chosen as further model systems to investigate whether the previously observed effects represent a general trend. Binding studies with these macrocycles towards β-D-glucopyranoside, an all-equatorial substituted carbohydrate substrate, included 1H NMR spectroscopic titrations and microcalorimetric investigations. The performed studies confirmed the previously observed tendency and showed that the compound bearing cyclohexyl groups displays the best binding properties.
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Affiliation(s)
| | | | - Monika Mazik
- Institut für Organische Chemie, Technische Universität Bergakademie Freiberg, Leipziger Straße 29, 09596 Freiberg, Germany
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11
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Ma M, Wang B, Hao A, Xing P. Efficient chirality transfer from chiral amines to oligo( p-phenylenevinylene)s to fabricate chiroptical materials. NANOSCALE 2022; 14:8163-8171. [PMID: 35621085 DOI: 10.1039/d2nr00789d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Oligo(p-phenylenevinylene) (OPV)-based luminophores show versatile luminescence properties based on their structural and packing arrangements, and however have seldomly been utilized in fabricating chiroptical materials. Here, we report a co-assembly strategy to introduce hydrophilic chiral amines into OPV-appended carboxylic acids via salt-bridge type hydrogen bonds. The coassembly in aqueous media allows for efficient chirality transfer with chiroptical activities. The participation of chiral amines altered the aromatic stacking from H- to J-type, which greatly enhanced the luminescence of the OPV compounds and facilitated the emergence of Cotton effects as well as circularly polarized luminescence. This work demonstrates the successful coassembly of OPV luminophores into chiral assemblies with tunable optical activity, showing potential for chiroptical application in optical chirality sensing.
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Affiliation(s)
- Mingfang Ma
- Laboratory of New Antitumor Drug Molecular Design & Synthesis of Jining Medical University, College of Basic Medicine, Jining Medical University, Jining 272067, P. R. China.
| | - Bo Wang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. China.
| | - Aiyou Hao
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. China.
| | - Pengyao Xing
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. China.
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12
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Li H, Kou L, Liang L, Li B, Zhao W, Yang XJ, Wu B. Anion-coordination-driven single-double helix switching and chiroptical molecular switching based on oligoureas. Chem Sci 2022; 13:4915-4921. [PMID: 35655878 PMCID: PMC9067589 DOI: 10.1039/d2sc00876a] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 04/02/2022] [Indexed: 11/21/2022] Open
Abstract
Synthetic foldamers with helical conformation are widely seen, but controllable interconversion amongst different geometries (helical structure and sense) is challenging. Here, a family of oligourea (tetra-, penta-, and hexa-) ligands bearing stereocenters at both ends are designed and shown to switch between single and double helices with concomitant inversion of helical senses upon anion coordination. The tetraurea ligand forms a right-handed single helix upon chloride anion (Cl-) binding and is converted into a left-handed double helix when phosphate anion (PO4 3-) is coordinated. The helical senses of the single and double helices are opposite, and the conversion is further found to be dependent on the stoichiometry of the ligand and phosphate anion. In contrast, only a single helix is formed for the hexaurea ligand with the phosphate anion. This distinction is attributed to the fact that the characteristic phosphate anion coordination geometry is satisfied by six urea moieties with twelve H-bonds. Our study revealed unusual single-double helix interconversion accompanied by unexpected chiroptical switching of helical senses.
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Affiliation(s)
- Hongfei Li
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University Xi'an 710069 China
| | - Lei Kou
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University Xi'an 710069 China
| | - Lin Liang
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology Beijing 102488 China
| | - Boyang Li
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University Xi'an 710069 China
| | - Wei Zhao
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology Beijing 102488 China
| | - Xiao-Juan Yang
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology Beijing 102488 China
| | - Biao Wu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University Xi'an 710069 China
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology Beijing 102488 China
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13
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Jiang C, Hu SJ, Zhou LP, Yang J, Sun QF. Lanthanide-organic pincer hosts with allosteric-controlled metal ion binding specificity. Chem Commun (Camb) 2022; 58:5494-5497. [PMID: 35416812 DOI: 10.1039/d2cc01379g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of lanthanide-organic pincer hosts were synthesized, which showed allosteric-controlled metal ion binding selectivities due to the lanthanide-induced subtle changes of the central vacant binding site.
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Affiliation(s)
- Chen Jiang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China. .,University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Shao-Jun Hu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China. .,University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Li-Peng Zhou
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China.
| | - Jian Yang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China.
| | - Qing-Fu Sun
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China. .,University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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14
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Koehler V, Roy A, Huc I, Ferrand Y. Foldaxanes: Rotaxane-like Architectures from Foldamers. Acc Chem Res 2022; 55:1074-1085. [PMID: 35293719 DOI: 10.1021/acs.accounts.2c00050] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Mechanically interlocked molecules such as rotaxanes and catenanes contain free-moving components that cannot dissociate and have enabled the investigation and control of various translational and rotational molecular motions. The architecture of pseudo-rotaxanes and of some kinetically labile rotaxanes is comparable to that of rotaxanes but their components are reversibly associated and not irreversibly interlocked. In other words, pseudo-rotaxanes may fall apart. This Account focuses on a peculiar family of rotaxane-like architectures termed foldaxanes.Foldaxanes consist of a helically folded oligomer wound around a rod-like dumbbell-shaped guest. Winding of the helix around the rod thus entails an unwinding-rewinding process that creates a kinetic barrier. It follows that foldaxanes, albeit reversibly assembled, have significant lifetimes and may not fall apart while defined molecular motions are triggered. Foldaxanes based on helically folded aromatic oligoamide hosts and oligo(alkyl carbamate) guests can be designed rationally through the inclusion of complementary binding motifs on the rod and at the inner rim of the helix so that helix length and rod length match. Single helical foldaxanes (bimolecular species) and double helical foldaxanes (trimolecular species) have thus been produced as well as poly[n]foldaxanes, in which several helices bind to long rods with multiple binding stations. When the binding stations differ and are organized in a certain sequence, a complementary sequence of different stacked helices, each matching with their binding station, can be assembled, thus reproducing in an artificial system a sort of translation process.Foldaxane helix handedness may be controlled by stereogenic centers on the rod-like guest. Handedness can also be transmitted from helix to helix in polyfoldaxanes. Foldaxane formation has drastic consequences for the rod properties, including its stiffening and the restriction of the mobility of a macrocycle already interlocked on the rod. Fast translation (without dissociation) of helices along rod-like guests has been demonstrated. Because of the helical nature of the hosts, translation may be accompanied by rotation in various sorts of screw-like motions. The possibility, on longer time scales, for the helix to dissociate from and reassociate to the rod has allowed for the design of complex, kinetically controlled supramolecular pathways of a helix on a rod. Furthermore, the design of helices with a directionality, that is, with two distinct termini, that bind to nonsymmetrical rod-like guests in a defined orientation makes it possible to also control the orientation of molecular motion. Altogether, foldaxanes constitute a distinct and full-of-potential family of rotaxane-like architectures that possess designer structures and allow orchestration of the time scales of various supramolecular events.
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Affiliation(s)
- Victor Koehler
- CNRS, Bordeaux Institut National Polytechnique, CBMN (UMR 5248), Université de Bordeaux, Institut Européen de Chimie et Biologie, 2 Rue Escarpit, 33600 Pessac, France
| | - Arundhati Roy
- Department Pharmazie, Ludwig-Maximilians-Universität, Butenandtstraße 5-13, D-81377 München, Germany
| | - Ivan Huc
- Department Pharmazie, Ludwig-Maximilians-Universität, Butenandtstraße 5-13, D-81377 München, Germany
| | - Yann Ferrand
- CNRS, Bordeaux Institut National Polytechnique, CBMN (UMR 5248), Université de Bordeaux, Institut Européen de Chimie et Biologie, 2 Rue Escarpit, 33600 Pessac, France
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15
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Jang HJ, Lee S, An BJ, Song G, Jeon HG, Jeong KS. Tweezer-type binding cavity formed by the helical folding of a carbazole-pyridine oligomer. Chem Commun (Camb) 2022; 58:1410-1413. [PMID: 34994755 DOI: 10.1039/d1cc06569f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
We have synthesised a new aromatic foldamer based on the carbazole-pyridine oligomers that adopt helical conformations via dipole-dipole interactions and π-stacking between two ethynyl bond-linked monomers. This foldamer scaffold has been further modified into a synthetic receptor with a tweezer-type binding cavity outside the helical backbone upon folding, in contrast to most aromatic foldamers with internal binding cavities. The tweezer-type cavity is composed of two parallel pyrenyl planes, allowing for the intercalation of a naphthalenediimide guest via π-stacking and CH⋯O interactions, as demonstrated using its 1H NMR spectra and X-ray crystal structure.
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Affiliation(s)
- Hye Jin Jang
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea.
| | - Seungwon Lee
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea.
| | - Byung Jun An
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea.
| | - Geunmoo Song
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea.
| | - Hae-Geun Jeon
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea.
| | - Kyu-Sung Jeong
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea.
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16
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Amrhein F, Mazik M. Compounds Combining a Macrocyclic Building Block and Flexible Side‐Arms as Carbohydrate Receptors: Syntheses and Structure‐Binding Activity Relationship Studies. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100758] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Felix Amrhein
- Institut für Organische Chemie Technische Universität Bergakademie Freiberg Leipziger Strasse 29 09599 Freiberg Germany
| | - Monika Mazik
- Institut für Organische Chemie Technische Universität Bergakademie Freiberg Leipziger Strasse 29 09599 Freiberg Germany
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17
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Lőrinczi B, Szatmári I. KYNA Derivatives with Modified Skeleton; Hydroxyquinolines with Potential Neuroprotective Effect. Int J Mol Sci 2021; 22:11935. [PMID: 34769362 PMCID: PMC8584415 DOI: 10.3390/ijms222111935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 10/29/2021] [Accepted: 10/29/2021] [Indexed: 11/21/2022] Open
Abstract
Kynurenic acid (KYNA) is an endogenous neuroprotective agent of increasing importance. Several derivatives have already been synthesized, bearing an abundance of functional groups attached to the main skeleton in different positions. Several of these compounds have already been tested in biological evaluations, with several of them targeting the same receptors and biological effects as KYNA. However, these modified compounds build upon the unmodified KYNA skeleton leaving a possible route for the synthesis of new, potentially neuroprotective derivatives with heteroatom-containing ring systems. The aim of this review is to summarize the syntheses of KYNA derivatives with altered skeletons and to pinpoint an appealing transformation for future medicinal lead molecules.
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Affiliation(s)
- Bálint Lőrinczi
- Institute of Pharmaceutical Chemistry, University of Szeged, Eötvös u. 6, H-6720 Szeged, Hungary;
- Institute of Pharmaceutical Chemistry, Interdisciplinary Excellence Center, University of Szeged, H-6720 Szeged, Hungary
| | - István Szatmári
- Institute of Pharmaceutical Chemistry, University of Szeged, Eötvös u. 6, H-6720 Szeged, Hungary;
- Institute of Pharmaceutical Chemistry, Interdisciplinary Excellence Center, University of Szeged, H-6720 Szeged, Hungary
- MTA-SZTE Stereochemistry Research Group, Hungarian Academy of Sciences, Eötvös u. 6, H-6720 Szeged, Hungary
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18
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Song G, Kim KM, Lee S, Jeong KS. Subtle Modification of Imine-linked Helical Receptors to Significantly Alter their Binding Affinities and Selectivities for Chiral Guests. Chem Asian J 2021; 16:2958-2966. [PMID: 34378325 DOI: 10.1002/asia.202100768] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 08/04/2021] [Indexed: 11/07/2022]
Abstract
Aromatic helical receptors P-1 and P-2 were slightly modified by aerobic oxidation to afford new receptors P-7 and P-8 with right-handed helical cavities. This subtle modification induced significant changes in the binding properties for chiral guests. Specifically, P-1 was reported to bind d-tartaric acid (Ka =35500 M-1 ), used as a template, much strongly than l-tartaric acid (326 M-1 ). In contrast, its modified receptor P-7 exhibited significantly reduced affinities for d-tartaric acid (3600 M-1 ) and l-tartaric acid (125 M-1 ). More dramatic changes in the affinities and selectivities were observed for P-2 and P-8 upon binding of polyol guests. P-2 was determined to selectively bind d-sorbitol (52000 M-1 ) over analogous guests, but P-8 showed no binding selectivity: d-sorbitol (1890 M-1 ), l-sorbitol (3330 M-1 ), d-arabitol (959 M-1 ), l-arabitol (4970 M-1 ) and xylitol (4960 M-1 ) in 5% (v/v) DMSO/CH2 Cl2 at 25±1 °C. These results clearly demonstrate that even subtle post-modifications of synthetic receptors may significantly alter their binding affinities and selectivities, in particular for guests of long and flexible chains.
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Affiliation(s)
- Geunmoo Song
- Department of Chemistry, Yonsei University, Seoul, 03722, Republic of Korea
| | - Kyung Mog Kim
- Department of Chemistry, Yonsei University, Seoul, 03722, Republic of Korea
| | - Seungwon Lee
- Department of Chemistry, Yonsei University, Seoul, 03722, Republic of Korea
| | - Kyu-Sung Jeong
- Department of Chemistry, Yonsei University, Seoul, 03722, Republic of Korea
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19
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Liu W, Tan Y, Jones LO, Song B, Guo QH, Zhang L, Qiu Y, Feng Y, Chen XY, Schatz GC, Stoddart JF. PCage: Fluorescent Molecular Temples for Binding Sugars in Water. J Am Chem Soc 2021; 143:15688-15700. [PMID: 34505510 DOI: 10.1021/jacs.1c06333] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The development of synthetic receptors that recognize carbohydrates in water with high selectivity and specificity is challenging on account of their structural complexity and strong hydrophilicity. Here, we report on the design and synthesis of two pyrene-based, temple-shaped receptors for the recognition of a range of common sugars in water. These receptors rely on the use of two parallel pyrene panels, which serve as roofs and floors, capable of forming multiple [C-H···π] interactions with the axially oriented C-H bonds on glycopyranosyl rings in the carbohydrate-based substrates. In addition, eight polarized pyridinium C-H bonds, projecting from the roofs and floors of the temple receptors toward the binding cavities, form [C-H···O] hydrogen bonds, with the equatorially oriented OH groups on the sugars located inside the hydrophobic cavities. Four para-xylylene pillars play a crucial role in controlling the distance between the roof and floor. These temple receptors are highly selective for the binding of glucose and its derivatives. Furthermore, they show enhanced fluorescence upon binding with glucose in water, a property which is useful for glucose-sensing in aqueous solution.
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Affiliation(s)
- Wenqi Liu
- Department of Chemistry, 2145 Sheridan Road, Northwestern University, Evanston, Illinois 60208, United States
| | - Yu Tan
- School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
| | - Leighton O Jones
- Department of Chemistry, 2145 Sheridan Road, Northwestern University, Evanston, Illinois 60208, United States
| | - Bo Song
- Department of Chemistry, 2145 Sheridan Road, Northwestern University, Evanston, Illinois 60208, United States
| | - Qing-Hui Guo
- Stoddart Institute of Molecular Science, Department of Chemistry, Zhejiang University, Hangzhou 310027, China.,ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou 311215, China
| | - Long Zhang
- Department of Chemistry, 2145 Sheridan Road, Northwestern University, Evanston, Illinois 60208, United States
| | - Yunyan Qiu
- Department of Chemistry, 2145 Sheridan Road, Northwestern University, Evanston, Illinois 60208, United States
| | - Yuanning Feng
- Department of Chemistry, 2145 Sheridan Road, Northwestern University, Evanston, Illinois 60208, United States
| | - Xiao-Yang Chen
- Department of Chemistry, 2145 Sheridan Road, Northwestern University, Evanston, Illinois 60208, United States
| | - George C Schatz
- Department of Chemistry, 2145 Sheridan Road, Northwestern University, Evanston, Illinois 60208, United States
| | - J Fraser Stoddart
- Department of Chemistry, 2145 Sheridan Road, Northwestern University, Evanston, Illinois 60208, United States.,School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia.,Stoddart Institute of Molecular Science, Department of Chemistry, Zhejiang University, Hangzhou 310027, China.,ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou 311215, China
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20
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Dengler S, Mandal PK, Allmendinger L, Douat C, Huc I. Conformational interplay in hybrid peptide-helical aromatic foldamer macrocycles. Chem Sci 2021; 12:11004-11012. [PMID: 34522297 PMCID: PMC8386670 DOI: 10.1039/d1sc03640h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 07/26/2021] [Indexed: 12/28/2022] Open
Abstract
Macrocyclic peptides are an important class of bioactive substances. When inserting an aromatic foldamer segment in a macrocyclic peptide, the strong folding propensity of the former may influence the conformation and alter the properties of the latter. Such an insertion is relevant because some foldamer-peptide hybrids have recently been shown to be tolerated by the ribosome, prior to forming macrocycles, and can thus be produced using an in vitro translation system. We have investigated the interplay of peptide and foldamer conformations in such hybrid macrocycles. We show that foldamer helical folding always prevails and stands as a viable means to stretch, i.e. unfold, peptides in a solvent dependent manner. Conversely, the peptide systematically has a reciprocal influence and gives rise to strong foldamer helix handedness bias as well as foldamer helix stabilisation. The hybrid macrocycles also show resistance towards proteolytic degradation.
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Affiliation(s)
- Sebastian Dengler
- Department of Pharmacy and Center for Integrated Protein Science, Ludwig-Maximilians-Universität Butenandtstraße 5-13 D-81377 Munich Germany
| | - Pradeep K Mandal
- Department of Pharmacy and Center for Integrated Protein Science, Ludwig-Maximilians-Universität Butenandtstraße 5-13 D-81377 Munich Germany
| | - Lars Allmendinger
- Department of Pharmacy and Center for Integrated Protein Science, Ludwig-Maximilians-Universität Butenandtstraße 5-13 D-81377 Munich Germany
| | - Céline Douat
- Department of Pharmacy and Center for Integrated Protein Science, Ludwig-Maximilians-Universität Butenandtstraße 5-13 D-81377 Munich Germany
| | - Ivan Huc
- Department of Pharmacy and Center for Integrated Protein Science, Ludwig-Maximilians-Universität Butenandtstraße 5-13 D-81377 Munich Germany
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21
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Francesconi O, Milanesi F, Nativi C, Roelens S. Molecular Recognition of Disaccharides in Water: Preorganized Macrocyclic or Adaptive Acyclic? Chemistry 2021; 27:10456-10460. [PMID: 33945180 PMCID: PMC8361761 DOI: 10.1002/chem.202101238] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Indexed: 12/02/2022]
Abstract
When facing the dilemma of following a preorganized or adaptive design approach in conceiving the architecture of new biomimetic receptors for carbohydrates, shape-persistent macrocyclic structures were most often chosen to achieve effective recognition of neutral saccharides in water. In contrast, acyclic architectures have seldom been explored, even though potentially simpler and more easily accessible. In this work, comparison of the binding properties of two structurally related diaminocarbazolic receptors, featuring a macrocyclic and an acyclic tweezer-shaped architecture, highlighted the advantages provided by the acyclic receptor in terms of selectivity in the recognition of 1,4-disaccharides of biological interest. Selective recognition of GlcNAc2 , the core fragment of N-glycans exposed on the surface of enveloped viruses, stands as an emblematic example. NMR spectroscopic data and molecular modeling calculations were used to ascertain the differences in binding mode and to shed light on the origin of recognition efficacy and selectivity.
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Affiliation(s)
- Oscar Francesconi
- Department of Chemistry “Ugo Schiff” and INSTMUniversity of FlorencePolo Scientifico e Tecnologico50019Sesto Fiorentino, FirenzeItaly
| | - Francesco Milanesi
- Department of Chemistry “Ugo Schiff” and INSTMUniversity of FlorencePolo Scientifico e Tecnologico50019Sesto Fiorentino, FirenzeItaly
- Magnetic Resonance Center CERMVia L. Sacconi 650019Sesto Fiorentino, FirenzeItaly
| | - Cristina Nativi
- Department of Chemistry “Ugo Schiff” and INSTMUniversity of FlorencePolo Scientifico e Tecnologico50019Sesto Fiorentino, FirenzeItaly
| | - Stefano Roelens
- Department of Chemistry “Ugo Schiff” and INSTMUniversity of FlorencePolo Scientifico e Tecnologico50019Sesto Fiorentino, FirenzeItaly
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22
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Sumida R, Tanaka Y, Niki K, Sei Y, Toyota S, Yoshizawa M. Cyclic monoterpenes trapped in a polyaromatic capsule: unusual selectivity, isomerization, and volatility suppression. Chem Sci 2021; 12:9946-9951. [PMID: 34377391 PMCID: PMC8317663 DOI: 10.1039/d1sc01987b] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 05/17/2021] [Indexed: 12/14/2022] Open
Abstract
Cyclic monoterpenes (CMTs) are intractable natural products with high volatility and strong odors so that there has been no molecular receptor capable of selectively and tightly trapping CMTs in both solution and the solid state. We herein report that a polyaromatic capsule acts as a functional nanoflask for CMTs with the following five features: (i) the capsule can selectively bind menthone from mixtures with other saturated CMTs in water. In contrast, (ii) treatment of the capsule with mixtures of menthone and π-conjugated CMTs gives rise to ternary host–guest complexes with high pair-selectivity. Notably, (iii) the encapsulated menthone displays unusual isomerization from a typical chair conformer to otherwise unstable conformers upon heating. (iv) The selective binding of volatilized CMTs is demonstrated by the capsule even in the solid state at atmospheric pressure. Furthermore, (v) the volatilities of CMTs are significantly suppressed at elevated temperatures by the capsule upon encapsulation in solution as well as in the solid state. A polyaromatic capsule demonstrated its unique host functions toward cyclic monoterpenes, i.e., selective binding in water, pair-selective encapsulation, unusual isomerization, selective binding in the solid state, and remarkable volatility suppression.![]()
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Affiliation(s)
- Ryuki Sumida
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology 4259 Nagatsuta, Midori-ku Yokohama 226-8503 Japan
| | - Yuya Tanaka
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology 4259 Nagatsuta, Midori-ku Yokohama 226-8503 Japan
| | - Keita Niki
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology 4259 Nagatsuta, Midori-ku Yokohama 226-8503 Japan
| | - Yoshihisa Sei
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology 4259 Nagatsuta, Midori-ku Yokohama 226-8503 Japan
| | - Shinji Toyota
- Department of Chemistry, School of Science, Tokyo Institute of Technology 2-12-1 Ookayama, Meguro-ku Tokyo 152-8551 Japan
| | - Michito Yoshizawa
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology 4259 Nagatsuta, Midori-ku Yokohama 226-8503 Japan
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23
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Seedorf T, Kirschning A, Solga D. Natural and Synthetic Oligoarylamides: Privileged Structures for Medical Applications. Chemistry 2021; 27:7321-7339. [PMID: 33481284 PMCID: PMC8251530 DOI: 10.1002/chem.202005086] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Indexed: 12/13/2022]
Abstract
The term "privileged structure" refers to a single molecular substructure or scaffold that can serve as a starting point for high-affinity ligands for more than one receptor type. In this report, a hitherto overlooked group of privileged substructures is addressed, namely aromatic oligoamides, for which there are natural models in the form of cystobactamids, albicidin, distamycin A, netropsin, and others. The aromatic and heteroaromatic core, together with a flexible selection of substituents, form conformationally well-defined scaffolds capable of specifically binding to conformationally well-defined regions of biomacromolecules such as helices in proteins or DNA often by acting as helices mimics themselves. As such, these aromatic oligoamides have already been employed to inhibit protein-protein and nucleic acid-protein interactions. This article is the first to bring together the scattered knowledge about aromatic oligoamides in connection with biomedical applications.
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Affiliation(s)
- Tim Seedorf
- Institut für Organische Chemie und Biomolekulares Wirkstoffzentrum, (BMWZ)Leibniz Universität HannoverSchneiderberg 1B30167HannoverGermany
| | - Andreas Kirschning
- Institut für Organische Chemie und Biomolekulares Wirkstoffzentrum, (BMWZ)Leibniz Universität HannoverSchneiderberg 1B30167HannoverGermany
| | - Danny Solga
- Institut für Organische Chemie und Biomolekulares Wirkstoffzentrum, (BMWZ)Leibniz Universität HannoverSchneiderberg 1B30167HannoverGermany
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24
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Kerff F, Liu CL, Mu X, Gilbert U, Smal L, Meinertzhagen L, Kauffmann B, Robeyns K, Singleton ML. Functionalized 1,8-Diazaiptycenes as Monomers for Aromatic Oligoamide Foldamers. Chempluschem 2021; 86:1162-1166. [PMID: 34402219 DOI: 10.1002/cplu.202100170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 04/23/2021] [Indexed: 11/06/2022]
Abstract
Diversification of the structures and the applications possible for foldamers rely on expansion of the building block library available for their synthesis. In this work, we describe the synthesis of a range of three dimensional heteroaromatic monomers, based on iptycene scaffolds, that are suitable for the synthesis of aromatic oligoamide foldamers. These units can be obtained in gram quantities in up to 80 % yield through [4+2] cycloaddition between diester, diamine, and amino acid derivatives of 1,8-diazaanthracenes and a variety of dienophiles. X-ray structural studies of the monomers and an oligomer show that the new motif orients the two heterocyclic rings and attached groups at an angle of approximately 120° to each other, opening new geometric considerations for the design of this class of foldamer.
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Affiliation(s)
- Francois Kerff
- Institute of condensed matter and nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST), Place Louis Pasteur 1/L4.01.02, 348, Louvain-la-Neuve, Belgium
| | - Cui-Lian Liu
- Institute of condensed matter and nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST), Place Louis Pasteur 1/L4.01.02, 348, Louvain-la-Neuve, Belgium
| | - Xiao Mu
- Institute of condensed matter and nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST), Place Louis Pasteur 1/L4.01.02, 348, Louvain-la-Neuve, Belgium
| | - Ugo Gilbert
- Institute of condensed matter and nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST), Place Louis Pasteur 1/L4.01.02, 348, Louvain-la-Neuve, Belgium
| | - Louis Smal
- Institute of condensed matter and nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST), Place Louis Pasteur 1/L4.01.02, 348, Louvain-la-Neuve, Belgium
| | - Loic Meinertzhagen
- Institute of condensed matter and nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST), Place Louis Pasteur 1/L4.01.02, 348, Louvain-la-Neuve, Belgium
| | - Brice Kauffmann
- Instut Européen de Chimie et Biologie (IECB), CNRS, IECB, UMS3033, INSERM, IECB, UMS3033, Université de Bordeaux, UMS3033, 2 rue R. Escarpit, 33600, Pessac, France
| | - Koen Robeyns
- Institute of condensed matter and nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST), Place Louis Pasteur 1/L4.01.02, 348, Louvain-la-Neuve, Belgium
| | - Michael L Singleton
- Institute of condensed matter and nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST), Place Louis Pasteur 1/L4.01.02, 348, Louvain-la-Neuve, Belgium
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25
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Abstract
The self-assembly of foldamers into macrocycles is a simple approach to non-biological higher-order structure. Previous work on the co-assembly of ortho-phenylene foldamers with rod-shaped linkers has shown that folding and self-assembly affect each other; that is, the combination leads to new emergent behavior, such as access to otherwise unfavorable folding states. To this point this relationship has been passive. Here, we demonstrate control of self-assembly by manipulating the foldamers' conformational energy surfaces. A series of o-phenylene decamers and octamers have been assembled into macrocycles using imine condensation. Product distributions were analyzed by gel-permeation chromatography and molecular geometries extracted from a combination of NMR spectroscopy and computational chemistry. The assembly of o-phenylene decamers functionalized with alkoxy groups or hydrogens gives both [2 + 2] and [3 + 3] macrocycles. The mixture results from a subtle balance of entropic and enthalpic effects in these systems: the smaller [2 + 2] macrocycles are entropically favored but require the oligomer to misfold, whereas a perfectly folded decamer fits well within the larger [3 + 3] macrocycle that is entropically disfavored. Changing the substituents to fluoro groups, however, shifts assembly quantitatively to the [3 + 3] macrocycle products, even though the structural changes are well-removed from the functional groups directly participating in bond formation. The electron-withdrawing groups favor folding in these systems by strengthening arene–arene stacking interactions, increasing the enthalpic penalty to misfolding. The architectural changes are substantial even though the chemical perturbation is small: analogous o-phenylene octamers do not fit within macrocycles when perfectly folded, and quantitatively misfold to give small macrocycles regardless of substitution. Taken together, these results represent both a high level of structural control in structurally complex foldamer systems and the demonstration of large-amplitude structural changes as a consequence of a small structural effects. The folding propensity of ortho-phenylene foldamers dictates the outcome of their self-assembly into macrocycles.![]()
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Affiliation(s)
- Viraj C Kirinda
- Department of Chemistry & Biochemistry, Miami University Oxford OH 45056 USA
| | - C Scott Hartley
- Department of Chemistry & Biochemistry, Miami University Oxford OH 45056 USA
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26
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Fraschetti C, Letzel MC, Paletta M, Mattay J, Crestoni ME, Chiavarino B, Filippi A. Unprotected Galactosamine as a Dynamic Key for a Cyclochiral Lock. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2021; 32:736-743. [PMID: 33499589 PMCID: PMC7944569 DOI: 10.1021/jasms.0c00437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 01/13/2021] [Accepted: 01/13/2021] [Indexed: 06/12/2023]
Abstract
The discrimination of d-galactosamine (G), representative of the amino-sugar class of compounds, has been probed through nano-ESI-FT-ICR mass spectrometry by isolating the relevant [C·H·G]+ proton-bound complexes with the enantiomers of the cyclochiral resorcin[4]arene C and allowing them to react toward three primary amines (B = EtNH2, iPrNH2, and (R)- and (S)-sBuNH2). The system under investigation presents several features that help to unveil the behavior of unprotected G in such a supramolecular architecture: (i) the hydrophobic derivatization of the C convex side forces the polar guest G to be coordinated by the cyclochiral concave region; (ii) protonated d-galactosamine exists as an anomeric mixture, dynamically interconverting throughout the experimental time-window; and (iii) different basicities of B allow the experiment to subtly tune the reactivity of the [C·H·G]+ complexes. Three [C·H·G]+ aggregate-types were found to exist, differing in both their origin and reactivity. The most reactive adducts ([C·H·G]ESI+), generated in the electrospray environment, undergo a G-to-B ligand exchange in competition with a partial isomerization to the unreactive [C·H·G]GAS+-type complexes. Finally, the poorly reactive [C·H·G]SOL+ aggregates are formed in solution over an hours-long time scale. A cyclochirality effect on the reactivity was found to depend on the considered [C·H·G]+ aggregate-type.
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Affiliation(s)
- Caterina Fraschetti
- Dipartimento
di Chimica e Tecnologie del Farmaco, Sapienza-Università
di Roma, Piazzale Aldo Moro 5, I-00185 Rome, Italy
| | - Matthias C. Letzel
- Organisch-Chemisches
Institut der Westf. Wilhelms Abt. Massenspektrometrie, Westfälische Wilhelms-Universität Münster, Room 252a, Corrensstraße 40, 48149 Münster, Germany
| | - Marlene Paletta
- Department
of Chemistry, Bielefeld University, P. O. Box 100131, D-33501 Bielefeld, Germany
| | - Jochen Mattay
- Department
of Chemistry, Bielefeld University, P. O. Box 100131, D-33501 Bielefeld, Germany
| | - Maria Elisa Crestoni
- Dipartimento
di Chimica e Tecnologie del Farmaco, Sapienza-Università
di Roma, Piazzale Aldo Moro 5, I-00185 Rome, Italy
| | - Barbara Chiavarino
- Dipartimento
di Chimica e Tecnologie del Farmaco, Sapienza-Università
di Roma, Piazzale Aldo Moro 5, I-00185 Rome, Italy
| | - Antonello Filippi
- Dipartimento
di Chimica e Tecnologie del Farmaco, Sapienza-Università
di Roma, Piazzale Aldo Moro 5, I-00185 Rome, Italy
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27
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Liu Y, Parks FC, Sheetz EG, Chen CH, Flood AH. Polarity-Tolerant Chloride Binding in Foldamer Capsules by Programmed Solvent-Exclusion. J Am Chem Soc 2021; 143:3191-3204. [PMID: 33596052 DOI: 10.1021/jacs.0c12562] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Persistent anion binding in a wide range of solution environments is a key challenge that continues to motivate and demand new strategies in synthetic receptor design. Though strong binding in low-polarity solvents has become routine, our ability to maintain high affinities in high-polarity solvents has not yet reached the standard set by nature. Anions are bound and transported regularly in aqueous environments by proteins that use secondary and tertiary structure to isolate anion binding sites from water. Inspired by this principle of solvent exclusion, we created a sequence-defined foldameric capsule whose global minimum conformation displays a helical folded state and is preorganized for 1:1 anion complexation. The high stability of the folded geometry and its ability to exclude solvent were supported by solid-state and solution phase studies. This capsule then withstood a 4-fold increase in solvent dielectric constant (εr) from dichloromethane (9) to acetonitrile (36) while maintaining a high and solvent-independent affinity of 105 M-1; ΔG ∼ 28 kJ mol-1. This behavior is unusual. More typical of solvent-dependent behavior, Cl- affinities were seen to plummet in control compounds, such as aryl-triazole macrocycles and pentads, with their solvent-exposed binding cavities susceptible to dielectric screening. Finally, dimethyl sulfoxide denatures the foldamer by putative solvent binding, which then lowers the foldamer's Cl- affinity to normal levels. The design of this capsule demonstrates a new prototype for the development of potent receptors that can operate in polar solvents and has the potential to help manage hydrophilic anions present in the hydrosphere and biosphere.
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Affiliation(s)
- Yun Liu
- Department of Chemistry, Indiana University 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Fred C Parks
- Department of Chemistry, Indiana University 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Edward G Sheetz
- Department of Chemistry, Indiana University 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Chun-Hsing Chen
- Department of Chemistry, Indiana University 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Amar H Flood
- Department of Chemistry, Indiana University 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
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28
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Pramanik S, Kauffmann B, Hecht S, Ferrand Y, Huc I. Light-mediated chiroptical switching of an achiral foldamer host in presence of a carbohydrate guest. Chem Commun (Camb) 2021; 57:93-96. [PMID: 33332504 DOI: 10.1039/d0cc06484j] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A photoresponsive diarylethene was incorporated in an achiral helical foldamer container. A carbohydrate guest was found to induce opposite handedness upon binding to the open and closed forms of the diarylethene-containing foldamer, thus enabling chiroptical switching of an achiral host mediated by a chiral guest.
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Affiliation(s)
- Susnata Pramanik
- Department Pharmazie and Center for Integrated Protein Science, Ludwig-Maximilians-Universität, Butenandtstr. 5-13, 81377 München, Germany.
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29
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Yin H, Zhang X, Wei J, Lu S, Bardelang D, Wang R. Recent advances in supramolecular antidotes. Theranostics 2021; 11:1513-1526. [PMID: 33391548 PMCID: PMC7738896 DOI: 10.7150/thno.53459] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2020] [Accepted: 10/27/2020] [Indexed: 12/30/2022] Open
Abstract
Poisons always have fascinated humankind. Initially considered as deleterious or hazardous substances, the modern era has witnessed the controlled utilization of dangerous poisons in medicine and cosmetics. Simultaneously, antidotes have become crucial as reversal agents to counteract the effects of a poison, and they are also used today to positively cancel the benefits of a poison after use. Currently, the majority of poisons are composed of small molecules. This review focuses on recent developments to reverse or prevent toxic effects of poisons by encapsulation in host molecules. Cyclodextrins, cucurbiturils, acyclic cucurbituril derivatives, calixarenes, and pillararenes, have been reported to largely impact the effects of toxic compounds, thus extending the current paradigm of small molecule antidotes by adding a new family of macrocyclic compounds to the current arsenal of antidotes. Along this line of research, endogenous "harmful" species are also sequestered by one or more of these supramolecular host molecules, expanding the potential of supramolecular antidotes to diverse therapeutic areas.
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Affiliation(s)
- Hang Yin
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau, China
| | - Xiangjun Zhang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau, China
| | - Jianwen Wei
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau, China
| | - Siyu Lu
- Green Catalysis Center, College of Chemistry, Zhengzhou University, 100 Kexue Road, Zhengzhou 450001, China
| | | | - Ruibing Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau, China
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30
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Köhler L, Hübler C, Seichter W, Mazik M. Binding modes of methyl α- d-glucopyranoside to an artificial receptor in crystalline complexes. RSC Adv 2021; 11:22221-22229. [PMID: 35480817 PMCID: PMC9034237 DOI: 10.1039/d1ra03390e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 02/28/2022] [Accepted: 06/01/2021] [Indexed: 01/04/2023] Open
Abstract
Complexes formed between methyl α-d-glucopyranoside and an artificial receptor represent a valuable source of information about the basic molecular features of carbohydrate recognition.
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Affiliation(s)
- Linda Köhler
- Institut für Organische Chemie, Technische Universität Bergakademie Freiberg, Leipziger Strasse 29, 09599 Freiberg, Germany
| | - Conrad Hübler
- Institut für Organische Chemie, Technische Universität Bergakademie Freiberg, Leipziger Strasse 29, 09599 Freiberg, Germany
| | - Wilhelm Seichter
- Institut für Organische Chemie, Technische Universität Bergakademie Freiberg, Leipziger Strasse 29, 09599 Freiberg, Germany
| | - Monika Mazik
- Institut für Organische Chemie, Technische Universität Bergakademie Freiberg, Leipziger Strasse 29, 09599 Freiberg, Germany
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31
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Wang Z, Li Y, Hao A, Xing P. Multi‐Modal Chiral Superstructures in Self‐Assembled Anthracene‐Terminal Amino Acids with Predictable and Adjustable Chiroptical Activities and Color Evolution. Angew Chem Int Ed Engl 2020; 60:3138-3147. [DOI: 10.1002/anie.202011907] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 10/27/2020] [Indexed: 12/20/2022]
Affiliation(s)
- Zhuoer Wang
- School of Chemistry and Chemical Engineering Shandong University Jinan 250100 P. R. China
| | - Yingzhou Li
- Shandong Provincial Key Laboratory of Molecular Engineering Qilu University of Technology (Shandong Academy of Science) Jinan 250353 P. R. China
| | - Aiyou Hao
- School of Chemistry and Chemical Engineering Shandong University Jinan 250100 P. R. China
| | - Pengyao Xing
- School of Chemistry and Chemical Engineering Shandong University Jinan 250100 P. R. China
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32
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Wang Z, Li Y, Hao A, Xing P. Multi‐Modal Chiral Superstructures in Self‐Assembled Anthracene‐Terminal Amino Acids with Predictable and Adjustable Chiroptical Activities and Color Evolution. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202011907] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Zhuoer Wang
- School of Chemistry and Chemical Engineering Shandong University Jinan 250100 P. R. China
| | - Yingzhou Li
- Shandong Provincial Key Laboratory of Molecular Engineering Qilu University of Technology (Shandong Academy of Science) Jinan 250353 P. R. China
| | - Aiyou Hao
- School of Chemistry and Chemical Engineering Shandong University Jinan 250100 P. R. China
| | - Pengyao Xing
- School of Chemistry and Chemical Engineering Shandong University Jinan 250100 P. R. China
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33
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Lei Z, Finnegan TJ, Gunawardana VWL, Pavlović RZ, Xie H, Moore CE, Badjić JD. A Molecular Capsule with Revolving Doors Partitioning Its Inner Space. Chemistry 2020; 26:16480-16485. [PMID: 32648599 DOI: 10.1002/chem.202003247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Indexed: 11/06/2022]
Abstract
Covalent capsule 1 was designed to include two molecular baskets linked with three mobile pyridines tucked into its inner space. On the basis of both theory (DFT) and experiments (NMR and X-ray crystallography), we found that the pyridine "doors" split the chamber (380 Å3 ) of 1 so that two equally sizeable compartments (190 Å3 ) became joined through a conformationally flexible aromatic barrier. The compartments of such unique host could be populated with CCl4 (88 Å3 ; PC=46 %), CBr4 (106 Å3 ; 56 %) or their combination CCl4 /CBr4 (PC=51 %), with thermodynamic stabilities ΔG° tracking the values of packing coefficients (PC). Halogen (C-X⋅⋅⋅π) and hydrogen bonding (C-H⋅⋅⋅X) contacts held the haloalkane guests in the cavities of 1. The consecutive complexations were found to occur in a negative allosteric manner, which we propose to result from the induced-fit mode of complexation. Newly designed 1 opens a way for probing the effects of inner conformational dynamics on noncovalent interactions, reactivity and intramolecular translation in confined spaces of hollow molecules.
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Affiliation(s)
- Zhiquan Lei
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, OH, 43228, USA
| | - Tyler J Finnegan
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, OH, 43228, USA
| | | | - Radoslav Z Pavlović
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, OH, 43228, USA
| | - Han Xie
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, OH, 43228, USA
| | - Curtis E Moore
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, OH, 43228, USA
| | - Jovica D Badjić
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, OH, 43228, USA
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34
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Song G, Jeong KS. Aromatic Helical Foldamers as Nucleophilic Catalysts for the Regioselective Acetylation of Octyl β-d-Glucopyranoside. Chempluschem 2020; 85:2475-2481. [PMID: 33206472 DOI: 10.1002/cplu.202000685] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 11/03/2020] [Indexed: 12/31/2022]
Abstract
Two indolocarbazole-naphthyridine foldamers 2 and 3 that fold into helical conformations were prepared. The 4-(N,N-dimethylamino)pyridine (DMAP) moiety was introduced at one end of the foldamer strands to develop foldamer-based catalysts for the site-selective acylation of polyols. These foldamers adopt helical conformations containing internal cavities capable of binding octyl β-d-glucopyranoside. The association constants were determined to be 1.9 (±0.1)×105 M-1 for 2 and 2.1 (±0.1)×105 M-1 for 3 in CH2 Cl2 at 25 °C. In the presence of DMAP, 2 or 3 as the catalysts, octyl β-d-glucopyranoside was subjected to acetylation under identical reaction conditions. The DMAP-catalysed reaction afforded the random distribution of the monoacetylates (6-OAc : 4-OAc : 3-OAc : 2-OAc=33 : 24 : 41 : 2). In contrast, foldamers 2 and 3 led to the predominant formation of 6-OAc. The relative distributions were estimated to be 6-OAc : 4-OAc : 3-OAc=88 : 4 : 6 : ∼0 with 2 and 6-OAc : 4-OAc : 3-OAc : 2-OAc=90 : 3 : 6 : 1 with 3.
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Affiliation(s)
- Geunmoo Song
- Department of Chemistry, Yonsei University, Seoul, 03722, Republic of Korea
| | - Kyu-Sung Jeong
- Department of Chemistry, Yonsei University, Seoul, 03722, Republic of Korea
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35
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Ohishi Y, Takata T, Inouye M. A Pyridine-Acetylene-Aniline Oligomer: Saccharide Recognition and Influence of this Recognition Array on the Activity as Acylation Catalyst. Chempluschem 2020; 85:2565-2569. [PMID: 33119207 DOI: 10.1002/cplu.202000603] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 10/09/2020] [Indexed: 01/27/2023]
Abstract
In order to create new functions of foldamer-type hosts, various kinds of recognition arrays are expected to be developed. Here, a pyridine-acetylene-aniline unit is presented as a new class of a saccharide recognition array. The conformational stabilities of this array were analyzed by DFT calculation, and suggested that a pyridine-acetylene-aniline oligomer tends to form a helical structure. An oligomer of this array was synthesized, and its association for octyl β-D-glucopyranoside was confirmed by 1 H NMR measurements. UV/Vis, circular dichroism, and fluorescence titration experiments revealed its high affinity for octyl glycosides in apolar solvents (Ka =104 to 105 M-1 ). This oligomer was relatively stable under basic conditions, and therefore this array was expected to be applied to the derivatization of saccharides. A 4-(dialkylamino)pyridine attached pyridine-acetylene-aniline oligomer proved to catalyze the acylation of the octyl glucoside.
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Affiliation(s)
- Yuki Ohishi
- Graduate School of Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
| | - Toshikazu Takata
- Graduate School of Advanced Science and Engineering, Hiroshima University Higashi-Hiroshima, Hiroshima, 739-8527, Japan
| | - Masahiko Inouye
- Graduate School of Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
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36
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Kim KM, Song G, Lee S, Jeon H, Chae W, Jeong K. Template‐Directed Quantitative One‐Pot Synthesis of Homochiral Helical Receptors Enabling Enantioselective Binding. Angew Chem Int Ed Engl 2020; 59:22475-22479. [DOI: 10.1002/anie.202011230] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Indexed: 01/11/2023]
Affiliation(s)
- Kyung Mog Kim
- Department of Chemistry Yonsei University Seoul 03722 Republic of Korea
| | - Geunmoo Song
- Department of Chemistry Yonsei University Seoul 03722 Republic of Korea
| | - Seungwon Lee
- Department of Chemistry Yonsei University Seoul 03722 Republic of Korea
| | - Hae‐Geun Jeon
- Department of Chemistry Yonsei University Seoul 03722 Republic of Korea
| | - Woojeong Chae
- Department of Chemistry Yonsei University Seoul 03722 Republic of Korea
| | - Kyu‐Sung Jeong
- Department of Chemistry Yonsei University Seoul 03722 Republic of Korea
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37
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Kim KM, Song G, Lee S, Jeon H, Chae W, Jeong K. Template‐Directed Quantitative One‐Pot Synthesis of Homochiral Helical Receptors Enabling Enantioselective Binding. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202011230] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Kyung Mog Kim
- Department of Chemistry Yonsei University Seoul 03722 Republic of Korea
| | - Geunmoo Song
- Department of Chemistry Yonsei University Seoul 03722 Republic of Korea
| | - Seungwon Lee
- Department of Chemistry Yonsei University Seoul 03722 Republic of Korea
| | - Hae‐Geun Jeon
- Department of Chemistry Yonsei University Seoul 03722 Republic of Korea
| | - Woojeong Chae
- Department of Chemistry Yonsei University Seoul 03722 Republic of Korea
| | - Kyu‐Sung Jeong
- Department of Chemistry Yonsei University Seoul 03722 Republic of Korea
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38
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Mateus P, Chandramouli N, Mackereth CD, Kauffmann B, Ferrand Y, Huc I. Allosteric Recognition of Homomeric and Heteromeric Pairs of Monosaccharides by a Foldamer Capsule. Angew Chem Int Ed Engl 2020; 59:5797-5805. [PMID: 31863707 PMCID: PMC7155081 DOI: 10.1002/anie.201914929] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Indexed: 12/11/2022]
Abstract
The recognition of either homomeric or heteromeric pairs of pentoses in an aromatic oligoamide double helical foldamer capsule was evidenced by circular dichroism (CD), NMR spectroscopy, and X-ray crystallography. The cavity of the host was predicted to be large enough to accommodate simultaneously two xylose molecules and to form a 1:2 complex (one container, two saccharides). Solution and solid-state data revealed the selective recognition of the α-4 C1 -d-xylopyranose tautomer, which is bound at two identical sites in the foldamer cavity. A step further was achieved by sequestering a heteromeric pair of pentoses, that is, one molecule of α-4 C1 -d-xylopyranose and one molecule of β-1 C4 -d-arabinopyranose despite the symmetrical nature of the host and despite the similarity of the guests. Subtle induced-fit and allosteric effects are responsible for the outstanding selectivities observed.
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Affiliation(s)
- Pedro Mateus
- CBMN (UMR5248)Univ. Bordeaux—CNRS—IPBInstitut Européen de Chimie et Biologie2 rue Robert Escarpit33600PessacFrance
| | - Nagula Chandramouli
- CBMN (UMR5248)Univ. Bordeaux—CNRS—IPBInstitut Européen de Chimie et Biologie2 rue Robert Escarpit33600PessacFrance
| | - Cameron D. Mackereth
- Université de BordeauxCNRSINSERM U1212 (ARNA)Institut Européen de Chimie et Biologie2 Rue Robert Escarpit33600PessacFrance
| | - Brice Kauffmann
- Université de BordeauxCNRSINSERMUMS3033Institut Européen de Chimie et Biologie (IECB)2 rue Robert Escarpit33600PessacFrance
| | - Yann Ferrand
- CBMN (UMR5248)Univ. Bordeaux—CNRS—IPBInstitut Européen de Chimie et Biologie2 rue Robert Escarpit33600PessacFrance
| | - Ivan Huc
- CBMN (UMR5248)Univ. Bordeaux—CNRS—IPBInstitut Européen de Chimie et Biologie2 rue Robert Escarpit33600PessacFrance
- Department Pharmazie and Center for Integrated Protein ScienceLudwig-Maximilians-UniversitätButenandtstr. 5–1381377MünchenGermany
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