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Dasgupta S, Sen S, Sathe RY, Pophali S, Kadu A, Jain R, Bera S, Roy S, Misra R. Conformation Controlled Hydrogelation of Minimalistic α, γ Hybrid Peptide. Biomacromolecules 2024; 25:3715-3723. [PMID: 38723225 DOI: 10.1021/acs.biomac.4c00270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2024]
Abstract
A majority of short peptide (≤7 amino acids) hydrogels are primarily assembled via cross β-structure formation. In contrast to the natural trend, herein, we report the formation of supramolecular hydrogel from the ultrashort hybrid folded peptide composed of canonical α-amino acid and noncanonical γ-amino acid, Fmoc-γPhe-Phe-OH. The designed hybrid peptide hydrogel is composed of entangled fibers, has viscoelastic properties, exhibits proteolytic stability, and exhibits cytocompatibility with L929 fibroblast cells. Mutating the peptide sequence by altering the position of γPhe from the N-termini to C-termini transforms the self-assembly into crystalline aggregates. Combining FTIR, 2D NMR, and DFT calculations revealed that the hydrogel-forming peptide adopts a C9 H-bonded conformation, resembling the well-known γ-turn. However, the isomeric hybrid peptide adopts an extended structure. The present study highlights the importance of secondary structure in the higher order assembly of minimalist hybrid peptides and broadens the range of secondary structures to design short peptide-based hydrogels.
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Affiliation(s)
- Sneha Dasgupta
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER) Mohali, S.A.S. Nagar (Mohali) 160062, India
| | - Sourav Sen
- Institute of Nano Science and Technology (INST), Sector 81, Knowledge City, Mohali 140306, Punjab, India
| | - Rohit Y Sathe
- Department of Biological Sciences and Biotechnology, Institute of Chemical Technology, Mumbai, Maharashtra 400019, India
| | - Salil Pophali
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER) Mohali, S.A.S. Nagar (Mohali) 160062, India
| | - Archit Kadu
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER) Mohali, S.A.S. Nagar (Mohali) 160062, India
| | - Rahul Jain
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER) Mohali, S.A.S. Nagar (Mohali) 160062, India
| | - Santu Bera
- Department of Chemistry, Ashoka University, Sonipat, Haryana 131029, India
| | - Sangita Roy
- Institute of Nano Science and Technology (INST), Sector 81, Knowledge City, Mohali 140306, Punjab, India
| | - Rajkumar Misra
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER) Mohali, S.A.S. Nagar (Mohali) 160062, India
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2
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Patel AR, Lawer A, Bhadbhade M, Hunter L. The influence of backbone fluorination on the helicity of α/γ-hybrid peptides. Org Biomol Chem 2024; 22:1608-1612. [PMID: 38305470 DOI: 10.1039/d3ob02016a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2024]
Abstract
Peptides that are composed of an alternating pattern of α- and γ-amino acids are potentially valuable as metabolism-resistant bioactive agents. For optimal function, some kind of conformational restriction is usually required to either stabilize the dominant 12-helix, or else to divert the peptide away from this conformation in a controlled way. Herein, we explore stereoselective fluorination as a method for controlling the conformations of α/γ-hybrid peptides. We show through a combination of X-ray, NMR and CD analyses that fluorination can either stabilize or disrupt the 12-helix, depending on the fluorine stereochemistry. These findings could inform the ongoing development of diverse functional hybrid peptides.
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Affiliation(s)
| | - Aggie Lawer
- School of Chemistry, University of New South Wales (UNSW), Sydney, Australia.
| | - Mohan Bhadbhade
- Mark Wainwright Analytical Centre, University of New South Wales (UNSW), Sydney, Australia
| | - Luke Hunter
- School of Chemistry, University of New South Wales (UNSW), Sydney, Australia.
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3
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Basuroy K, de Jesus Velazquez-Garcia J, Techert S. Investigation of encapsulated water wire within self-assembled hydrophilic nanochannels, in a modified γ 4-amino acid crystals: Tracking thermally induced changes of intermolecular interactions within a crystalline hydrate. Amino Acids 2024; 56:9. [PMID: 38315214 PMCID: PMC10844418 DOI: 10.1007/s00726-023-03372-4] [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: 07/19/2023] [Accepted: 11/20/2023] [Indexed: 02/07/2024]
Abstract
Nanostructures formed by the self-assembly of modified/unmodified amino acids have the potential to be useful in several biological/nonbiological applications. In that regard, the greater conformational space provided by γ-amino acids, owing to their additional backbone torsional degrees of freedom and enhanced proteolytic stability, compared to their α-counterparts, should be explored. Though, modified single amino acid-based nanomaterials such as nanobelts or hydrogels are developed by utilizing the monosubstituted γ-amino acids derived from the backbone homologation of phenylalanine (Phe). Examples of a single γ-amino acid-based porous nanostructure capable of accommodating solvent molecules are not really known. The crystal structures of a modified γ4(R)Phe residue, Boc-γ4(R)Phe-OH, at different temperatures, showed that hydrogen-bonded water molecules are forming a wire inside hydrophilic nanochannels. The dynamics of intermolecular interactions between the water wire and the inner wall of the channel with relation to the temperature change was investigated by analyzing the natural bonding orbital (NBO) calculation results performed with the single crystal structures obtained at different temperature points. The NBO results showed that from 325 K onward, the strength of water-water interactions in the water wire are getting weaker, whereas, for the water-inner wall interactions, it getting stronger, suggesting a favorable change in the orientation of water molecules with temperatures, for the latter.
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Affiliation(s)
- Krishnayan Basuroy
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607, Hamburg, Germany.
| | | | - Simone Techert
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607, Hamburg, Germany
- Institut für Röntgenphysik, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, 37077, Göttingen, Germany
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4
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Puneeth Kumar DRGKR, Nalawade SA, Pahan S, Singh M, Senapati DK, Roy S, Dey S, Toraskar SU, Raghothama S, Gopi HN. Proteolytically Stable ααγ-Hybrid Peptides Inhibit the Aggregation and Cytotoxicity of Aβ 42. ACS Chem Neurosci 2023; 14:3398-3408. [PMID: 37656905 DOI: 10.1021/acschemneuro.3c00302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/03/2023] Open
Abstract
The recent approval of antibody-based therapy for targeting the clearance of amyloid plaques fuels the research in designing small molecules and peptide inhibitors to target the aggregation of Aβ-peptides. Here, we report that the 15-residue ααγ-hybrid peptide not only inhibits the aggregation of soluble Aβ42 into fibrils but also disintegrates the aggregated Aβ42 fibrils into smaller assemblies. Further, the hybrid peptide completely rescues neuronal cells from the toxicity of Aβ42 at equimolar concentrations. The shorter 10- and 12-mer peptides showed weak aggregation inhibition activity, while the fully hydrophobic 15-mer ααγ-hybrid peptide analogue showed no aggregation inhibition activity. Further, the 15-mer ααγ-hybrid peptide showed resistance against trypsin digestion and also nontoxic to the neuronal cells. The CD revealed that the peptide upon interaction induces a helix-type conformation in the Aβ42. This is in sharp contrast to the β-sheet conformation of Aβ42 upon incubation. The two-dimensional-NMR (2D-NMR) analysis revealed a large perturbation in the chemical shifts of residues at the N-terminus. The presence of 15-mer peptide at an equimolar concentration of Aβ42 showed less tendency for aggregation and also exhibited nontoxicity to the neuronal cells. The results reported here may be useful in designing new therapeutics for Alzheimer's disease.
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Affiliation(s)
- DRGKoppalu R Puneeth Kumar
- Department of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pashan, Pune 411008, India
| | - Sachin A Nalawade
- Department of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pashan, Pune 411008, India
| | - Saikat Pahan
- Department of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pashan, Pune 411008, India
| | - Manjeet Singh
- Department of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pashan, Pune 411008, India
| | - Dillip K Senapati
- NMR Research Centre, Indian Institute of Science, Bangalore 560012, India
| | - Souvik Roy
- Department of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pashan, Pune 411008, India
| | - Sanjit Dey
- Department of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pashan, Pune 411008, India
| | - Sandip U Toraskar
- Department of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pashan, Pune 411008, India
| | | | - Hosahudya N Gopi
- Department of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pashan, Pune 411008, India
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5
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Legrand B, Maillard LT. α,β-Unsaturated γ-Peptide Foldamers. Chempluschem 2021; 86:629-645. [PMID: 33856125 DOI: 10.1002/cplu.202100045] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 03/31/2021] [Indexed: 01/01/2023]
Abstract
Despite their concomitant emergence in the 1990s, γ-peptide foldamers have not developed as fast as β-peptide foldamers and to date, only a few γ-oligomer structures have been reported, and with sparse applications. Among these examples, sequences containing α,β-unsaturated γ-amino acids have recently drawn attention since the Z/E configurations of the double bond provide opposite planar restrictions leading to divergent conformational behaviors, from helix to extended structures. In this Review, we give a comprehensive overview of the developments of γ-peptide foldamers containing α,β-unsaturated γ-amino acids with examples of applications for health and catalysis, as well as materials science.
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Affiliation(s)
- Baptiste Legrand
- Institut des Biomolécules Max Mousseron, IBMM, University of Montpellier, ENSCM, CNRS, Montpellier, France., 15 Av. Charles Flahault BP 14 491, 34093, Montpellier Cedex 5, France
| | - Ludovic T Maillard
- Institut des Biomolécules Max Mousseron, IBMM, University of Montpellier, ENSCM, CNRS, Montpellier, France., 15 Av. Charles Flahault BP 14 491, 34093, Montpellier Cedex 5, France
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6
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Dey S, Misra R, Saseendran A, Pahan S, Gopi HN. Metal‐Coordinated Supramolecular Polymers from the Minimalistic Hybrid Peptide Foldamers. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015838] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Sanjit Dey
- Department of Chemistry Indian Institute of Science Education and Research (IISER), Pune Dr. Homi Bhabha Road Pune 411008 India
| | - Rajkumar Misra
- Department of Chemistry Indian Institute of Science Education and Research (IISER), Pune Dr. Homi Bhabha Road Pune 411008 India
| | - Abhijith Saseendran
- Department of Chemistry Indian Institute of Science Education and Research (IISER), Pune Dr. Homi Bhabha Road Pune 411008 India
| | - Saikat Pahan
- Department of Chemistry Indian Institute of Science Education and Research (IISER), Pune Dr. Homi Bhabha Road Pune 411008 India
| | - Hosahudya N. Gopi
- Department of Chemistry Indian Institute of Science Education and Research (IISER), Pune Dr. Homi Bhabha Road Pune 411008 India
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7
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Dey S, Misra R, Saseendran A, Pahan S, Gopi HN. Metal‐Coordinated Supramolecular Polymers from the Minimalistic Hybrid Peptide Foldamers. Angew Chem Int Ed Engl 2021; 60:9863-9868. [DOI: 10.1002/anie.202015838] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 01/19/2021] [Indexed: 11/11/2022]
Affiliation(s)
- Sanjit Dey
- Department of Chemistry Indian Institute of Science Education and Research (IISER), Pune Dr. Homi Bhabha Road Pune 411008 India
| | - Rajkumar Misra
- Department of Chemistry Indian Institute of Science Education and Research (IISER), Pune Dr. Homi Bhabha Road Pune 411008 India
| | - Abhijith Saseendran
- Department of Chemistry Indian Institute of Science Education and Research (IISER), Pune Dr. Homi Bhabha Road Pune 411008 India
| | - Saikat Pahan
- Department of Chemistry Indian Institute of Science Education and Research (IISER), Pune Dr. Homi Bhabha Road Pune 411008 India
| | - Hosahudya N. Gopi
- Department of Chemistry Indian Institute of Science Education and Research (IISER), Pune Dr. Homi Bhabha Road Pune 411008 India
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8
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Reja RM, Kumar V, George G, Patel R, Puneeth Kumar DRGKR, Raghothama S, Gopi HN. Structural Investigation of Hybrid Peptide Foldamers Composed of α-Dipeptide Equivalent β-Oxy-δ 5 -amino Acids. Chemistry 2020; 26:4304-4309. [PMID: 31960517 DOI: 10.1002/chem.201904780] [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: 10/21/2019] [Revised: 01/15/2020] [Indexed: 01/05/2023]
Abstract
Due to their equivalent lengths, δ-amino acids can serve as surrogates of α-dipeptides. However, δ-amino acids with proteinogenic side chains have not been well studied because of synthetic difficulties and because of their insolubility in organic solvents. Recently we reported the spontaneous supramolecular gelation of δ-peptides composed of β(O)-δ5 -amino acids. Here, we report the incorporation of β(O)-δ5 -amino acids as guests into the host α-helix, α,γ-hybrid peptide 12-helix and their single-crystal conformations. In addition, we studied the solution conformations of hybrid peptides composed of 1:1 alternating α and β(O)-δ5 -amino acids. In contrast to the control α-helix structures, the crystal structure of peptides with β(O)-δ5 -amino acids exhibit α-helical conformations consisting of both 13- and 10-membered H-bonds. The α,δ-hybrid peptide adopted mixed 13/11-helix conformation in solution with alternating H-bond directionality. Crystal-structure analysis revealed that the α,γ4 -hybrid peptide accommodated the guest β(O)-δ5 -amino acid without significant deviation to the overall helix folding. The results reported here emphasize that β(O)-δ5 -amino acids with proteinogenic side chains can be accommodated into regular α-helix or 12-helix as guests without much deviation of the overall helix folding of the peptides.
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Affiliation(s)
- Rahi M Reja
- Department of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pune, 411008, India
| | - Vivek Kumar
- Department of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pune, 411008, India
| | - Gijo George
- NMR Research Centre, Indian Institute of Science, Bangalore, 560012, India
| | - Rajat Patel
- Department of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pune, 411008, India
| | - DRGKoppalu R Puneeth Kumar
- Department of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pune, 411008, India
| | | | - Hosahudya N Gopi
- Department of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pune, 411008, India
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9
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Misra R, George G, Saseendran A, Raghothama S, Gopi HN. Ambidextrous α,γ-Hybrid Peptide Foldamers. Chem Asian J 2019; 14:4408-4414. [PMID: 31670907 DOI: 10.1002/asia.201901411] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 10/21/2019] [Indexed: 12/12/2022]
Abstract
Molecular chirality is ubiquitous in nature. The natural biopolymers, proteins and DNA, preferred a right-handed helical bias due to the inherent stereochemistry of the monomer building blocks. Here, we are reporting a rare co-existence of left- and right-handed helical conformations and helix-terminating property at the C-terminus within a single molecule of α,γ-hybrid peptide foldamers composed of achiral Aib (α-aminoisobutyric acid) and 3,3-dimethyl-substituted γ-amino acid (Adb; 4-amino-3,3-dimethylbutanoic acid). At the molecular level, the left- and right-handed helical screw sense of α,γ-hybrid peptides are representing a macroscopic tendril perversion. The pronounced helix-terminating behaviour of C-terminal Adb residues was further explored to design helix-Schellman loop mimetics and to study their conformations in solution and single crystals. The stereochemical constraints of dialkyl substitutions on γ-amino acids showed a marked impact on the folding behaviour of α,γ-hybrid peptides.
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Affiliation(s)
- Rajkumar Misra
- Department of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pashan, Pune, 411008, India
| | - Gijo George
- NMR Research Center, Indian Institute of Science, Bangalore, 560012, India
| | - Abhijith Saseendran
- Department of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pashan, Pune, 411008, India
| | | | - Hosahudya N Gopi
- Department of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pashan, Pune, 411008, India
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10
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Misra R, Saseendran A, Dey S, Gopi HN. Metal‐Helix Frameworks from Short Hybrid Peptide Foldamers. Angew Chem Int Ed Engl 2019; 58:2251-2255. [DOI: 10.1002/anie.201810849] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Indexed: 12/13/2022]
Affiliation(s)
- Rajkumar Misra
- Department of ChemistryIndian Institution of Science Education and Research Dr. Homi Bhabha Road Pune- 411008 India
| | - Abhijith Saseendran
- Department of ChemistryIndian Institution of Science Education and Research Dr. Homi Bhabha Road Pune- 411008 India
| | - Sanjit Dey
- Department of ChemistryIndian Institution of Science Education and Research Dr. Homi Bhabha Road Pune- 411008 India
| | - Hosahudya N. Gopi
- Department of ChemistryIndian Institution of Science Education and Research Dr. Homi Bhabha Road Pune- 411008 India
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11
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Misra R, Saseendran A, Dey S, Gopi HN. Metal-Helix Frameworks from Short Hybrid Peptide Foldamers. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201810849] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Rajkumar Misra
- Department of Chemistry; Indian Institution of Science Education and Research; Dr. Homi Bhabha Road Pune- 411008 India
| | - Abhijith Saseendran
- Department of Chemistry; Indian Institution of Science Education and Research; Dr. Homi Bhabha Road Pune- 411008 India
| | - Sanjit Dey
- Department of Chemistry; Indian Institution of Science Education and Research; Dr. Homi Bhabha Road Pune- 411008 India
| | - Hosahudya N. Gopi
- Department of Chemistry; Indian Institution of Science Education and Research; Dr. Homi Bhabha Road Pune- 411008 India
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12
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Von Borowski RG, Macedo AJ, Gnoatto SCB. Peptides as a strategy against biofilm-forming microorganisms: Structure-activity relationship perspectives. Eur J Pharm Sci 2018; 114:114-137. [DOI: 10.1016/j.ejps.2017.11.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Revised: 10/20/2017] [Accepted: 11/08/2017] [Indexed: 10/18/2022]
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13
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Misra R, Raja KMP, Hofmann HJ, Gopi HN. Modulating the Structural Properties of α,γ-Hybrid Peptides by α-Amino Acid Residues: Uniform 12-Helix Versus "Mixed" 12/10-Helix. Chemistry 2017; 23:16644-16652. [PMID: 28922503 DOI: 10.1002/chem.201703871] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Indexed: 01/06/2023]
Abstract
The most important natural α- and 310 -helices are stabilized by unidirectional intramolecular hydrogen bonds along the helical cylinder. In contrast, we report here on 12/10-helical conformations with alternately changing hydrogen-bond directionality in sequences of α,γ-hybrid peptides P1-P5 [P1: Boc-Ala-Aic-Ala-Aic-COOH; P2: Boc-Leu-Aic-Leu-Aic-OEt; P3: Boc-Leu-Aic-Leu-Aic-Leu-Aic-Aib-OMe; P4: Boc-Ala-Aic-Ala-Aic-Ala-Aic-Ala-OMe; P5: Boc-Leu-Aic-Leu-Aic-Leu-Aic-Leu-Aic-Aib-OMe; Aic=4-aminoisocaproic acid, Aib=2-aminoisobutyric acid] composed of natural α-amino acids and the achiral γ4,4 -dimethyl substituted γ-amino acid Aic in solution and in single crystals. The helical conformations are stabilized by alternating i→i+3 and i→i-1 intramolecular hydrogen bonds. The experimental data are supported by ab initio MO calculations. Surprisingly, replacing the natural α-amino acids of the sequence by the achiral dialkyl amino acid Ac6 c [P6: Boc-Ac6 c-Aic-Ac6 c-Aic-Ac6 c-Aic-Ac6 c-Aic-Ac6 c-CONHMe; Ac6 c = 1-aminocyclohexane-1-carboxylic acid] led to a 12-helix with unidirectional hydrogen bonds showing an entirely different backbone conformation. The results presented here emphasize the influence of the structure of the α-amino acid residues in dictating the helix types in α,γ-hybrid peptide foldamers and demonstrate the consequences for folding of small structural variations in the monomers.
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Affiliation(s)
- Rajkumar Misra
- Department of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pashan, Pune, 411 008, India
| | - K Muruga Poopathi Raja
- Department of Physical Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai, 625 021, India
| | - Hans-Jörg Hofmann
- Institute of Biochemistry, Faculty of Biosciences, Pharmacy and Psychology, Brüderstrasse 34, 04103, Leipzig, Germany
| | - Hosahudya N Gopi
- Department of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pashan, Pune, 411 008, India
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14
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Bonnel C, Legrand B, Simon M, Martinez J, Bantignies JL, Kang YK, Wenger E, Hoh F, Masurier N, Maillard LT. C9/12
Ribbon-Like Structures in Hybrid Peptides Alternating α- and Thiazole-Based γ-Amino Acids. Chemistry 2017; 23:17584-17591. [DOI: 10.1002/chem.201704001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Clément Bonnel
- Institut des Biomolécules Max Mousseron; UMR CNRS-UM-ENSCM 5247, UFR des Sciences Pharmaceutiques et Biologiques; 15 Avenue Charles Flahault 34093 Montpellier Cedex 5 France
| | - Baptiste Legrand
- Institut des Biomolécules Max Mousseron; UMR CNRS-UM-ENSCM 5247, UFR des Sciences Pharmaceutiques et Biologiques; 15 Avenue Charles Flahault 34093 Montpellier Cedex 5 France
| | - Matthieu Simon
- Institut des Biomolécules Max Mousseron; UMR CNRS-UM-ENSCM 5247, UFR des Sciences Pharmaceutiques et Biologiques; 15 Avenue Charles Flahault 34093 Montpellier Cedex 5 France
| | - Jean Martinez
- Institut des Biomolécules Max Mousseron; UMR CNRS-UM-ENSCM 5247, UFR des Sciences Pharmaceutiques et Biologiques; 15 Avenue Charles Flahault 34093 Montpellier Cedex 5 France
| | | | - Young Kee Kang
- Department of Chemistry; Chungbuk National University, Cheongju; Chungbuk 28644 Republic of Korea
| | - Emmanuel Wenger
- Laboratoire de Cristallographie, Résonance Magnétique et Modélisation; Université de Lorraine, CNRS, UMR 7036; Nancy France
| | - Francois Hoh
- Centre de Biochimie Structurale, CNRS UMR 5048-INSERM 1054; University of Montpellier; Montpellier France
| | - Nicolas Masurier
- Institut des Biomolécules Max Mousseron; UMR CNRS-UM-ENSCM 5247, UFR des Sciences Pharmaceutiques et Biologiques; 15 Avenue Charles Flahault 34093 Montpellier Cedex 5 France
| | - Ludovic T. Maillard
- Institut des Biomolécules Max Mousseron; UMR CNRS-UM-ENSCM 5247, UFR des Sciences Pharmaceutiques et Biologiques; 15 Avenue Charles Flahault 34093 Montpellier Cedex 5 France
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15
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Richard M, Felten AS, Chrétien F, Averlant-Petit MC, Pellegrini-Moïse N. Synthesis and conformational studies of short mixed γ/α-glycopeptides based on sugar γ 3,3 -amino acids. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.10.038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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16
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Benke SN, Thulasiram HV, Gopi HN. Potent Antimicrobial Activity of Lipidated Short α,γ-Hybrid Peptides. ChemMedChem 2017; 12:1610-1615. [DOI: 10.1002/cmdc.201700370] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Sushil N. Benke
- Department of Chemistry; Indian Institute of Science Education and Research; Dr. Homi Bhabha Road Pune 41108 India
| | | | - Hosahudya N. Gopi
- Department of Chemistry; Indian Institute of Science Education and Research; Dr. Homi Bhabha Road Pune 41108 India
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17
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Misra R, Saseendran A, George G, Veeresh K, Raja KMP, Raghothama S, Hofmann HJ, Gopi HN. Structural Dimorphism of Achiral α,γ-Hybrid Peptide Foldamers: Coexistence of 12- and 15/17-Helices. Chemistry 2017; 23:3764-3772. [DOI: 10.1002/chem.201605753] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Indexed: 01/17/2023]
Affiliation(s)
- Rajkumar Misra
- Department of Chemistry; Indian Institution of Science Education and Research; Dr. Homi Bhabha Road Pune 411021 India
| | - Abhijith Saseendran
- Department of Chemistry; Indian Institution of Science Education and Research; Dr. Homi Bhabha Road Pune 411021 India
| | - Gijo George
- NMR Research Center; Indian Institute of Science; Bangalore 560012 India
| | - Kuruva Veeresh
- Department of Chemistry; Indian Institution of Science Education and Research; Dr. Homi Bhabha Road Pune 411021 India
| | - K. Muruga Poopathi Raja
- Department of Physical Chemistry; School of Chemistry; Madurai Kamaraj University; Madurai 625 021 India
| | | | - Hans-Jörg Hofmann
- Institute of Biochemistry; Faculty of Biosciences, Pharmacy and Psychology; Talstraße 33 04103 Leipzig Germany
| | - Hosahudya N. Gopi
- Department of Chemistry; Indian Institution of Science Education and Research; Dr. Homi Bhabha Road Pune 411021 India
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18
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Malik A, Kumar MG, Bandyopadhyay A, Gopi HN. Helices with additional H-bonds: crystallographic conformations of α,γ-hybrid peptides helices composed of β-hydroxy γ-amino acids (statines). Biopolymers 2017; 108. [DOI: 10.1002/bip.22978] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 08/05/2016] [Accepted: 08/25/2016] [Indexed: 12/31/2022]
Affiliation(s)
- Ankita Malik
- Department of Chemistry; Indian Institute of Science Education and Research-Pune; Dr. Homi Bhabha Road Pune 411008 India
| | - Mothukuri Ganesh Kumar
- Department of Chemistry; Indian Institute of Science Education and Research-Pune; Dr. Homi Bhabha Road Pune 411008 India
| | - Anupam Bandyopadhyay
- Department of Chemistry; Indian Institute of Science Education and Research-Pune; Dr. Homi Bhabha Road Pune 411008 India
| | - Hosahudya N. Gopi
- Department of Chemistry; Indian Institute of Science Education and Research-Pune; Dr. Homi Bhabha Road Pune 411008 India
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19
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Shankar S, Wani NA, Singh UP, Rai R. Incipient Twisted Ribbon Structure Stabilized by C12Helical Turns in γ4/α Hybrid Peptide. ChemistrySelect 2016. [DOI: 10.1002/slct.201600793] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Sudha Shankar
- Medicinal Chemistry Division; CSIR-Indian Institute of Integrative Medicine; Canal Road Jammu Tawi- 180001 India
- Academy of Scientific and Innovative Research; New Delhi India
| | - Naiem Ahmad Wani
- Medicinal Chemistry Division; CSIR-Indian Institute of Integrative Medicine; Canal Road Jammu Tawi- 180001 India
| | - Umesh Prasad Singh
- CSIR-Indian Institute of Chemical Biology; 4, Raja, S.C. Mullick Road Kolkata- 700032 India
| | - Rajkishor Rai
- Medicinal Chemistry Division; CSIR-Indian Institute of Integrative Medicine; Canal Road Jammu Tawi- 180001 India
- Academy of Scientific and Innovative Research; New Delhi India
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20
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Fisher BF, Gellman SH. Impact of γ-Amino Acid Residue Preorganization on α/γ-Peptide Foldamer Helicity in Aqueous Solution. J Am Chem Soc 2016; 138:10766-9. [PMID: 27529788 DOI: 10.1021/jacs.6b06177] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
α/γ-Peptide foldamers containing either γ(4)-amino acid residues or ring-constrained γ-amino acid residues have been reported to adopt 12-helical secondary structure in nonpolar solvents and in the solid state. These observations have engendered speculation that the seemingly flexible γ(4) residues have a high intrinsic helical propensity and that residue-based preorganization may not significantly stabilize the 12-helical conformation. However, the prior studies were conducted in environments that favor intramolecular H-bond formation. Here, we use 2D-NMR to compare the ability of γ(4) residues and cyclic γ residues to support 12-helix formation in more challenging environments, methanol and water. Both γ residue types support 12-helical folding in methanol, but only the cyclically constrained γ residues promote helicity in water. These results demonstrate the importance of residue-based preorganization strategies for achieving stable folding among short foldamers in aqueous solution.
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Affiliation(s)
- Brian F Fisher
- Department of Chemistry, University of Wisconsin-Madison , Madison, Wisconsin 53706, United States
| | - Samuel H Gellman
- Department of Chemistry, University of Wisconsin-Madison , Madison, Wisconsin 53706, United States
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21
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Ganesh Kumar M, Thombare VJ, Katariya MM, Veeresh K, Raja KMP, Gopi HN. Non-classical Helices withcisCarbon-Carbon Double Bonds in the Backbone: Structural Features of α,γ-Hybrid Peptide Foldamers. Angew Chem Int Ed Engl 2016; 55:7847-51. [DOI: 10.1002/anie.201602861] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Mothukuri Ganesh Kumar
- Department of Chemistry; Indian Institute of Science Education and Research; Dr. Homi Bhabha Road, Pashan Pune- 411008 India
| | - Varsha J. Thombare
- Department of Chemistry; Indian Institute of Science Education and Research; Dr. Homi Bhabha Road, Pashan Pune- 411008 India
| | - Mona M. Katariya
- Department of Chemistry; Indian Institute of Science Education and Research; Dr. Homi Bhabha Road, Pashan Pune- 411008 India
| | - Kuruva Veeresh
- Department of Chemistry; Indian Institute of Science Education and Research; Dr. Homi Bhabha Road, Pashan Pune- 411008 India
| | - K. Muruga Poopathi Raja
- Department of Physical Chemistry; School of Chemistry; Madurai Kamaraj University; Madurai- 625 021 India
| | - Hosahudya N. Gopi
- Department of Chemistry; Indian Institute of Science Education and Research; Dr. Homi Bhabha Road, Pashan Pune- 411008 India
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22
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Ganesh Kumar M, Thombare VJ, Katariya MM, Veeresh K, Raja KMP, Gopi HN. Non-classical Helices withcisCarbon-Carbon Double Bonds in the Backbone: Structural Features of α,γ-Hybrid Peptide Foldamers. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201602861] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mothukuri Ganesh Kumar
- Department of Chemistry; Indian Institute of Science Education and Research; Dr. Homi Bhabha Road, Pashan Pune- 411008 India
| | - Varsha J. Thombare
- Department of Chemistry; Indian Institute of Science Education and Research; Dr. Homi Bhabha Road, Pashan Pune- 411008 India
| | - Mona M. Katariya
- Department of Chemistry; Indian Institute of Science Education and Research; Dr. Homi Bhabha Road, Pashan Pune- 411008 India
| | - Kuruva Veeresh
- Department of Chemistry; Indian Institute of Science Education and Research; Dr. Homi Bhabha Road, Pashan Pune- 411008 India
| | - K. Muruga Poopathi Raja
- Department of Physical Chemistry; School of Chemistry; Madurai Kamaraj University; Madurai- 625 021 India
| | - Hosahudya N. Gopi
- Department of Chemistry; Indian Institute of Science Education and Research; Dr. Homi Bhabha Road, Pashan Pune- 411008 India
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23
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Misra R, Reja RM, Narendra LV, George G, Raghothama S, Gopi HN. Exploring structural features of folded peptide architectures in the construction of nanomaterials. Chem Commun (Camb) 2016; 52:9597-600. [DOI: 10.1039/c6cc04502b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Supramolecular assemblies of conformationally biased α,γ-hybrid peptides composed of alternating α-Phe and 4,4-dimethyl substituted γ-amino acids are investigated.
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Affiliation(s)
- Rajkumar Misra
- Department of Chemistry
- Indian Institution of Science Education and Research
- Pune-411008
- India
| | - Rahi M. Reja
- Department of Chemistry
- Indian Institution of Science Education and Research
- Pune-411008
- India
| | | | - Gijo George
- NMR Research Center
- Indian Institute of Science
- Bangalore-560012
- India
| | | | - Hosahudya N. Gopi
- Department of Chemistry
- Indian Institution of Science Education and Research
- Pune-411008
- India
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24
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Honarparvar B, Skelton AA. Molecular dynamics simulation and conformational analysis of some catalytically active peptides. J Mol Model 2015; 21:100. [DOI: 10.1007/s00894-015-2645-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Accepted: 03/09/2015] [Indexed: 01/10/2023]
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25
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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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26
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Paikar A, Pramanik A, Haldar D. Influence of side-chain interactions on the self-assembly of discotic tricarboxyamides: a crystallographic insight. RSC Adv 2015. [DOI: 10.1039/c5ra03864b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Side chains interactions promote the self-assembly of discotic tricarboxyamides to form an entangled fiber network and thermo responsive gel.
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Affiliation(s)
- Arpita Paikar
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- India
| | - Apurba Pramanik
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- India
| | - Debasish Haldar
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- India
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27
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Jadhav SV, Misra R, Gopi HN. Foldamers to Nanotubes: Influence of Amino Acid Side Chains in the Hierarchical Assembly of α,γ4-Hybrid Peptide Helices. Chemistry 2014; 20:16523-8. [DOI: 10.1002/chem.201404961] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Indexed: 12/28/2022]
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28
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Stanovych A, Guillot R, Kouklovsky C, Miclet E, Alezra V. β,γ-Diamino acid: an original building block for hybrid α/γ-peptide synthesis with extra hydrogen bond donating group. Amino Acids 2014; 46:2753-7. [DOI: 10.1007/s00726-014-1831-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Accepted: 08/21/2014] [Indexed: 01/01/2023]
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29
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Sonti R, Dinesh B, Basuroy K, Raghothama S, Shamala N, Balaram P. C12 helices in long hybrid (αγ)n peptides composed entirely of unconstrained residues with proteinogenic side chains. Org Lett 2014; 16:1656-9. [PMID: 24588077 DOI: 10.1021/ol500307p] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Unconstrained γ(4) amino acid residues derived by homologation of proteinogenic amino acids facilitate helical folding in hybrid (αγ)n sequences. The C12 helical conformation for the decapeptide, Boc-[Leu-γ(4)(R)Val]5-OMe, is established in crystals by X-ray diffraction. A regular C12 helix is demonstrated by NMR studies of the 18 residue peptide, Boc-[Leu-γ(4)(R)Val]9-OMe, and a designed 16 residue (αγ)n peptide, incorporating variable side chains. Unconstrained (αγ)n peptides show an unexpectedly high propensity for helical folding in long polypeptide sequences.
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Affiliation(s)
- Rajesh Sonti
- Molecular
Biophysics Unit, Indian Institute of Science, Bangalore, India, 560012
- NMR
Research Centre, Indian Institute of Science, Bangalore, India, 560012
| | - Bhimareddy Dinesh
- Molecular
Biophysics Unit, Indian Institute of Science, Bangalore, India, 560012
| | - Krishnayan Basuroy
- Department
of Physics, Indian Institute of Science, Bangalore, India, 560012
| | | | | | - Padmanabhan Balaram
- Molecular
Biophysics Unit, Indian Institute of Science, Bangalore, India, 560012
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30
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Walsh PS, Kusaka R, Buchanan EG, James WH, Fisher BF, Gellman SH, Zwier TS. Cyclic constraints on conformational flexibility in γ-peptides: conformation specific IR and UV spectroscopy. J Phys Chem A 2013; 117:12350-62. [PMID: 24147873 DOI: 10.1021/jp408736t] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Single-conformation spectroscopy has been used to study two cyclically constrained and capped γ-peptides: Ac-γACHC-NHBn (hereafter γACHC, Figure 1a), and Ac-γACHC-γACHC-NHBn (γγACHC, Figure 1b), under jet-cooled conditions in the gas phase. The γ-peptide backbone in both molecules contains a cyclohexane ring incorporated across each Cβ-Cγ bond and an ethyl group at each Cα. This substitution pattern was designed to stabilize a (g+, g+) torsion angle sequence across the Cα-Cβ-Cγ segment of each γ-amino acid residue. Resonant two-photon ionization (R2PI), infrared-ultraviolet hole-burning (IR-UV HB), and resonant ion-dip infrared (RIDIR) spectroscopy have been used to probe the single-conformation spectroscopy of these molecules. In both γACHC and γγACHC, all population is funneled into a single conformation. With RIDIR spectra in the NH stretch (3200-3500 cm(-1)) and amide I/II regions (1400-1800 cm(-1)), in conjunction with theoretical predictions, assignments have been made for the conformations observed in the molecular beam. γACHC forms a single nearest-neighbor C9 hydrogen-bonded ring whereas γγACHC takes up a next-nearest-neighbor C14 hydrogen-bonded structure. The gas-phase C14 conformation represents the beginning of a 2.614-helix, suggesting that the constraints imposed on the γ-peptide backbone by the ACHC and ethyl groups already impose this preference in the gas-phase di-γ-peptide, in which only a single C14 H-bond is possible, constituting one full turn of the helix. A similar conformational preference was previously documented in crystal structures and NMR analysis of longer γ-peptide oligomers containing the γACHC subunit [Guo, L., et al. Angew. Chem. Int. Ed. 2011, 50, 5843-5846]. In the gas phase, the γACHC-H2O complex was also observed and spectroscopically interrogated in the molecular beam. Here, the monosolvated γACHC retains the C9 hydrogen bond observed in the bare molecule, with the water acting as a bridge between the C-terminal carbonyl and the π-cloud of the UV chromophore. This is in contrast to the unconstrained γ-peptide-H2O complex, which incorporates H2O into both C9 and amide-stacked conformations.
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Affiliation(s)
- Patrick S Walsh
- Department of Chemistry, Purdue University , 560 Oval Drive, West Lafayette, Indiana 47907 United States
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31
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Jadhav SV, Misra R, Singh SK, Gopi HN. Efficient Access to Enantiopure γ4-Amino Acids with Proteinogenic Side-Chains and Structural Investigation of γ4-Asn and γ4-Ser in Hybrid Peptide Helices. Chemistry 2013; 19:16256-62. [DOI: 10.1002/chem.201302732] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2013] [Indexed: 01/09/2023]
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32
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Shin YH, Mortenson DE, Satyshur KA, Forest KT, Gellman SH. Differential impact of β and γ residue preorganization on α/β/γ-peptide helix stability in water. J Am Chem Soc 2013; 135:8149-52. [PMID: 23701135 PMCID: PMC3815483 DOI: 10.1021/ja403319q] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Cyclic constraints have proven to be very effective for preorganizing β-amino acid residues and thereby stabilizing β- and α/β-peptide helices, but little is known about possible preorganization effects among γ residues. Here we assess and compare the impact of cyclic preorganization of β and γ residues in the context of a specific α/β/γ-peptide helix. The results show that β residue preorganization is critical for helix stability but that γ residue preorganization is less important.
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Affiliation(s)
- Young-Hee Shin
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53706, United States
| | - David E. Mortenson
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53706, United States
| | - Kenneth A. Satyshur
- Department of Bacteriology and Biophysics, University of Wisconsin-Madison, Madison, WI 53706, United States
| | - Katrina T. Forest
- Department of Bacteriology and Biophysics, University of Wisconsin-Madison, Madison, WI 53706, United States
| | - Samuel H. Gellman
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53706, United States
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33
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Jadhav SV, Singh SK, Reja RM, Gopi HN. γ-Amino acid mutated α-coiled coils as mild thermal triggers for liposome delivery. Chem Commun (Camb) 2013; 49:11065-7. [DOI: 10.1039/c3cc46652c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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34
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Jadhav SV, Gopi HN. Remarkable thermoresponsive nanofibers from γ-peptides. Chem Commun (Camb) 2013; 49:9179-81. [DOI: 10.1039/c3cc45383a] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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