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Borba A, Gómez-Zavaglia A, Fausto R. Conformers, infrared spectrum, UV-induced photochemistry, and near-IR-induced generation of two rare conformers of matrix-isolated phenylglycine. J Chem Phys 2015; 141:154306. [PMID: 25338895 DOI: 10.1063/1.4897526] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The conformational space of α-phenylglycine (PG) have been investigated theoretically at both the DFT/B3LYP/6-311++G(d,p) and MP2/6-311++G(d,p) levels of approximation. Seventeen different minima were found on the investigated potential energy surfaces, which are characterized by different dominant intramolecular interactions: type I conformers are stabilized by hydrogen bonds of the type N-H···O=C, type II by a strong O-H···N hydrogen bond, type III by weak N-H···O-H hydrogen bonds, and type IV by a C=O···H-C contact. The calculations indicate also that entropic effects are relevant in determining the equilibrium populations of the conformers of PG in the gas phase, in particular in the case of conformers of type II, where the strong intramolecular O-H···N hydrogen bond considerably diminishes entropy by reducing the conformational mobility of the molecule. In consonance with the relative energies of the conformers and barriers for conformational interconversion, only 3 conformers of PG were observed for the compound isolated in cryogenic Ar, Xe, and N2 matrices: the conformational ground state (ICa), and forms ICc and IITa. All other significantly populated conformers existing in the gas phase prior to deposition convert either to conformer ICa or to conformer ICc during matrix deposition. The experimental observation of ICc had never been achieved hitherto. Narrowband near-IR irradiation of the first overtone of νOH vibrational mode of ICa and ICc in nitrogen matrices (at 6910 and 6930 cm(-1), respectively) led to selective generation of two additional conformers of high-energy, ITc and ITa, respectively, which were also observed experimentally for the first time. In addition, these experiments also provided the key information for the detailed vibrational characterization of the 3 conformers initially present in the matrices. On the other hand, UV irradiation (λ = 255 nm) of PG isolated in a xenon matrix revealed that PG undergoes facile photofragmentation through two photochemical pathways that are favored for different initial conformations of the reactant: (a) decarboxylation, leading to CO2 plus benzylamine (the dominant photofragmentation channel in PG cis-COOH conformers ICa and ICc) and (b) decarbonylation, with generation of CO plus benzonitrile, H2O and H2 (prevalent in the case of the trans-COOH conformer, IITa).
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Affiliation(s)
- Ana Borba
- Department of Chemistry, University of Coimbra, Coimbra P-3004-535, Portugal
| | | | - Rui Fausto
- Department of Chemistry, University of Coimbra, Coimbra P-3004-535, Portugal
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2
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Christmann M, Hu J, Kitamura M, Stoltz B. Tetrahedron reports on organic chemistry. Tetrahedron 2015. [DOI: 10.1016/s0040-4020(15)00744-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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3
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Stoltz B, Motherwell W. Tetrahedron reports on organic chemistry. Tetrahedron 2013. [DOI: 10.1016/s0040-4020(13)01252-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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4
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Fasting C, Schalley CA, Weber M, Seitz O, Hecht S, Koksch B, Dernedde J, Graf C, Knapp EW, Haag R. Multivalenz als chemisches Organisations- und Wirkprinzip. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201201114] [Citation(s) in RCA: 164] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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5
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Fasting C, Schalley CA, Weber M, Seitz O, Hecht S, Koksch B, Dernedde J, Graf C, Knapp EW, Haag R. Multivalency as a Chemical Organization and Action Principle. Angew Chem Int Ed Engl 2012; 51:10472-98. [DOI: 10.1002/anie.201201114] [Citation(s) in RCA: 688] [Impact Index Per Article: 57.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Indexed: 12/26/2022]
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6
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Gupta S, Tyagi R, Parmar VS, Sharma SK, Haag R. Polyether based amphiphiles for delivery of active components. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.04.047] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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7
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Stoltz B, Motherwell W. Tetrahedron reports on organic chemistry. Tetrahedron 2011. [DOI: 10.1016/s0040-4020(11)00770-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Stoltz B, Motherwell W. Tetrahedron reports on organic chemistry. Tetrahedron 2010. [DOI: 10.1016/s0040-4020(10)01735-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Xu KX, Cheng PF, Zhao J, Wang CJ. Enantioselective Fluorescent Sensors for Amino Acid Derivatives Based on BINOL Bearing S-tryptophan Unit: Synthesis and Chiral Recognition. J Fluoresc 2010; 21:991-1000. [DOI: 10.1007/s10895-009-0585-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2009] [Accepted: 12/14/2009] [Indexed: 11/30/2022]
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11
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Boussalah N, Touzani R, Bouabdallah I, Kadiri SE, Ghalem S. Synthesis, structure and catalytic properties of tripodal amino-acid derivatized pyrazole-based ligands. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.molcata.2009.02.031] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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12
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Qing G, Sun T, Chen Z, Yang X, Wu X, He Y. ‘Naked-eye’ enantioselective chemosensors for N-protected amino acid anions bearing thiourea units. Chirality 2009; 21:363-73. [DOI: 10.1002/chir.20593] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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13
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Tetrahedron reports on organic chemistry. Tetrahedron 2008. [DOI: 10.1016/s0040-4020(08)00897-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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14
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Dutot L, Gaucher A, Elkassimi K, Drapeau J, Wakselman M, Mazaleyrat JP, Peggion C, Formaggio F, Toniolo C. Synthesis and Characterisation of Helical β-Peptide Architectures that Contain (S)-β3-HDOPA(Crown Ether) Derivatives. Chemistry 2008; 14:3154-63. [DOI: 10.1002/chem.200701360] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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15
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Wright K, Lohier JF, Wakselman M, Mazaleyrat JP, Formaggio F, Peggion C, De Zotti M, Toniolo C. Synthesis of enantiopure, axially chiral, Cα-tetrasubstituted α-amino acids with binaphthyl-based crowned side chains and 3D-structural analysis of their peptides. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.01.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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16
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Wright K, Anddad R, Lohier JF, Steinmetz V, Wakselman M, Mazaleyrat JP, Formaggio F, Peggion C, De Zotti M, Keiderling TA, Huang R, Toniolo C. Synthesis, Ion Complexation Study, and 3D-Structural Analysis of Peptides Based on Crown-Carrier,Cα-Methyl-L-DOPA Amino Acids. European J Org Chem 2008. [DOI: 10.1002/ejoc.200700917] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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17
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Tetrahedron reports on organic chemistry. Tetrahedron 2007. [DOI: 10.1016/s0040-4020(07)01371-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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18
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Mollica A, Guardiani G, Davis P, Ma SW, Porreca F, Lai J, Mannina L, Sobolev AP, Hruby VJ. Synthesis of stable and potent delta/mu opioid peptides: analogues of H-Tyr-c[D-Cys-Gly-Phe-D-Cys]-OH by ring-closing metathesis. J Med Chem 2007; 50:3138-42. [PMID: 17539621 PMCID: PMC2274921 DOI: 10.1021/jm061048b] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ring-closing metathesis has emerged as a powerful tool in organic synthesis for generating cyclic structures via C-C double bond formation. Recently, it has been successfully used in peptide chemistry for obtaining cyclic molecules bridged through an olefin unit in place of the usual disulfide bond. Here, we describe this approach for obtaining cyclic olefin bridged analogues of H-Tyr-c[D-Cys-Gly-Phe-Cys]-OH. The synthesis of the new ligands was performed using the second generation Grubbs' catalyst. The resulting cis-8 (cDADAE) and trans-9 (tDADAE) were fully characterized and tested at delta, mu, and kappa opioid receptors. Also the linear precursor 13 (lDADAE) and the hydrogenated derivative 11 (rDADAE) also were tested. All the cyclic products containing a olefinic bond are slightly selective but highly active and potent for the delta and mu opioid receptors. Activity toward the kappa opioid receptors was absent or very low.
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MESH Headings
- Allyl Compounds/chemical synthesis
- Allyl Compounds/chemistry
- Allyl Compounds/pharmacology
- Animals
- Enkephalins/chemical synthesis
- Enkephalins/chemistry
- Enkephalins/pharmacology
- Guinea Pigs
- Ileum/drug effects
- Ileum/innervation
- Ileum/physiology
- In Vitro Techniques
- Male
- Mice
- Mice, Inbred ICR
- Muscle Contraction/drug effects
- Muscle, Smooth/drug effects
- Muscle, Smooth/physiology
- Myenteric Plexus/physiology
- Peptides, Cyclic/chemical synthesis
- Peptides, Cyclic/chemistry
- Peptides, Cyclic/pharmacology
- Radioligand Assay
- Receptors, Opioid, delta/agonists
- Receptors, Opioid, delta/metabolism
- Receptors, Opioid, kappa/metabolism
- Receptors, Opioid, mu/agonists
- Receptors, Opioid, mu/metabolism
- Structure-Activity Relationship
- Vas Deferens/drug effects
- Vas Deferens/physiology
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Affiliation(s)
| | | | | | | | | | | | | | | | - Victor J. Hruby
- * To whom correspondence should be addressed. Tel.: +1 520 621 6332. Fax: +1 520 621 8407. E-mail:
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19
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Tetrahedron reports on organic chemistry. Tetrahedron 2007. [DOI: 10.1016/s0040-4020(07)00834-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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20
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Qing GY, He YB, Wang F, Qin HJ, Hu CG, Yang X. Enantioselective Fluorescent Sensors for Chiral Carboxylates Based on Calix[4]arenes Bearing anL-Tryptophan Unit. European J Org Chem 2007. [DOI: 10.1002/ejoc.200600917] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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21
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Xu KX, He YB, Qing GY, Qin HJ, Liu SY, Meng LZ. Synthesis and Enantioselective Discrimination of Chiral Fluorescence Receptors Bearing Amino Acid Units. CHINESE J CHEM 2007. [DOI: 10.1002/cjoc.200790075] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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22
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Tetrahedron reports on organic chemistry. Tetrahedron 2007. [DOI: 10.1016/s0040-4020(07)00205-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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23
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Lectka T, Motherwell W. Tetrahedron reports on organic chemistry. Tetrahedron 2006. [DOI: 10.1016/s0040-4020(06)01801-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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24
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Stastny V, Anderson A, Rudkevich DM. Supramolecular Structures from Lysine Peptides and Carbon Dioxide. J Org Chem 2006; 71:8696-705. [PMID: 17080996 DOI: 10.1021/jo061144k] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The design, synthesis, and characterization of novel linear and cross-linked supramolecular polymers that are easily available from biologically friendly lysine peptides and carbon dioxide (CO2) are reported here. Polymeric structures 5, 6, and 19 readily form from peptides 2, 3, and 15, respectively, at ambient temperatures by simply bubbling CO2 through their solutions in apolar organic solvents (CHCl3, benzene) and even in the presence of 10% MeOH. The resulting gels can be easily isolated from solution, dried, and stored refrigerated for several months. At the same time, they may thermally release CO2 and convert back to the corresponding monomers. As a consequence, their structures and physical properties are switchable. They may also trap, store, and release foreign molecules. The typical entrapment procedure was demonstrated for tripeptide 3, CO2, and the commercially available dye coumarin 2.
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Affiliation(s)
- Vaclav Stastny
- Department of Chemistry & Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019-0065, USA
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25
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Lectka T, Motherwell W. Tetrahedron reports on organic chemistry. Tetrahedron 2006. [DOI: 10.1016/s0040-4020(06)00771-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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26
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Abstract
The neutral form of the unnatural amino acid phenylglycine was vaporized by laser ablation, and the presence of two conformers was detected in a supersonic expansion by Fourier transform microwave spectroscopy. Both conformers were unequivocally identified by comparison of their experimental rotational and quadrupole coupling constants with those calculated ab initio. The most stable conformer is stabilized by intramolecular hydrogen bonds N-H...O=C, N-H...pi (with the closest C-C bond in the aromatic ring), and a cis-COOH interaction. The other conformer exhibits a O-H...N hydrogen bond between the hydrogen atom of the hydroxyl group and the lone pair at the nitrogen atom.
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Affiliation(s)
- M Eugenia Sanz
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, 47005 Valladolid, Spain
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27
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Qing GY, He YB, Zhao Y, Hu CG, Liu SY, Yang X. Calix[4]arene-Based Chromogenic Chemosensor for the α-Phenylglycine Anion: Synthesis and Chiral Recognition. European J Org Chem 2006. [DOI: 10.1002/ejoc.200500704] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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28
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Lu G, Grossman JE, Lambert JB. General but Discriminating Fluorescent Chemosensor for Aliphatic Amines. J Org Chem 2006; 71:1769-76. [PMID: 16496960 DOI: 10.1021/jo0518405] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Aliphatic amines are sensitively and discriminatively detected through binding with demethylated naphthol AS-BI (7-bromo-3-hydroxy-2-naphth-o-hydroxyanilide, 2) and fluorescence of the resulting complex. Recognition of the amine by the chemosensor 2 occurs via proton transfer of the naphtholic proton to the amine and is facilitated by the presence of the phenol group. Amine basicity is the primary controller of detection. Poorly basic aromatic and conjugated amines such as pyridine and aniline are not detected. Hydrogen bonding within the complex allows further differentiation of aliphatic amines. Doubly primary, conformationally flexible diamines are the most sensitive to detection, followed by secondary amines.
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Affiliation(s)
- Gang Lu
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, USA
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30
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31
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32
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Licini G, Prins LJ, Scrimin P. Oligopeptide Foldamers: From Structure to Function. European J Org Chem 2005. [DOI: 10.1002/ejoc.200400521] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Giulia Licini
- University of Padova, Department of Chemical Sciences, and ITM‐CNR, Padova Section, Via Marzolo, 1, 35131 Padova, Italy
| | - Leonard J. Prins
- University of Padova, Department of Chemical Sciences, and ITM‐CNR, Padova Section, Via Marzolo, 1, 35131 Padova, Italy
| | - Paolo Scrimin
- University of Padova, Department of Chemical Sciences, and ITM‐CNR, Padova Section, Via Marzolo, 1, 35131 Padova, Italy
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33
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Ossowski T, Zarzeczańska D, Zalewski L, Niedziałkowski P, Majewski R, Szymańska A. Synthesis of lysine derivatives containing aza-crown ethers and a chromophore unit. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.01.041] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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34
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Xu KX, Wu XJ, He YB, Liu SY, Qing GY, Meng LZ. Synthesis and chiral recognition of novel chiral fluorescence receptors bearing 9-anthryl moieties. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.tetasy.2004.12.023] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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35
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Abstract
Derivatives of amino acids bearing a porphyrin moiety on a side chain were synthesized by coupling a porphyrin to a glutamic acid side chain; the utility of these compounds was demonstrated by their use in solid-phase synthesis of a peptide bearing a cationic porphyrin and by studying its DNA-binding properties.
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Affiliation(s)
- Eric Biron
- Département de chimie and CREFSIP, Faculté des sciences et de génie, Université Laval, Québec, Québec, Canada G1K 7P4
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36
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37
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Posner PG, Motherwell PW. Tetrahedron reports on organic chemistry. Tetrahedron 2004. [DOI: 10.1016/s0040-4020(04)01396-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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38
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Formaggio F, Barazza A, Bertocco A, Toniolo C, Broxterman QB, Kaptein B, Brasola E, Pengo P, Pasquato L, Scrimin P. Role of Secondary Structure in the Asymmetric Acylation Reaction Catalyzed by Peptides Based on Chiral Cα-Tetrasubstituted α-Amino Acids. J Org Chem 2004; 69:3849-56. [PMID: 15153018 DOI: 10.1021/jo040107v] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In a recent series of papers, Miller and co-workers were able to show that His(pi-Me)-based, terminally protected peptides are potent catalysts of the asymmetric acyl transfer reaction, useful for the kinetic resolution of alcohols. In a structure-supporting solvent, one of the most active compounds, an Aib-containing tetrapeptide, is folded in a doubly intramolecularly H-bonded beta-hairpin motif incorporating a type-II' beta-turn conformation. In this work, we have expanded the study of the Miller tetrapeptide by examining a set of analogues and shorter sequences (dipeptide amides), characterized by chiral C(alpha)-tetrasubstituted alpha-amino acids of diverging bulkiness and optical configuration. Peptide synthesis in solution, conformational analysis by FT-IR absorption and (1)H NMR techniques, and screening of catalytic activity as well have been performed. Our results confirm the close relationship between the beta-hairpin 3D-structure and the catalytic activity of the peptides. A tetrapeptide analogue slightly more selective than the Miller compound has been found. However, the terminally protected, industrially more appealing, dipeptide amides are poorly effective.
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Affiliation(s)
- Fernando Formaggio
- Department of Chemistry, University of Padova, and ICB, CNR, 35131 Padua, Italy
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39
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Tetrahedron reports on organic chemistry. Tetrahedron 2004. [DOI: 10.1016/s0040-4020(04)00315-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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40
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Biron E, Otis F, Meillon JC, Robitaille M, Lamothe J, Van Hove P, Cormier ME, Voyer N. Design, synthesis, and characterization of peptide nanostructures having ion channel activity. Bioorg Med Chem 2004; 12:1279-90. [PMID: 15018900 DOI: 10.1016/j.bmc.2003.08.037] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2003] [Revised: 07/31/2003] [Accepted: 08/01/2003] [Indexed: 11/24/2022]
Abstract
We report the synthesis and the functional studies of multiple crown alpha-helical peptides designed to form artificial ion channels. The approach combines the versatility of solid phase peptide synthesis, the conformational predictability of peptidic molecules, and the solution synthesis of crown ethers with engineerable ion-binding abilities. Several biophysical methods were employed to characterize the activity and the mode of action of these crown peptide nanostructures. The 21 residue peptides bearing six 21-EC-7 turned out to facilitate the translocation of ions in a similar fashion to natural ion channels.
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Affiliation(s)
- Eric Biron
- Département de chimie and Centre de recherche sur la fonction, la structure et l'ingénierie des protéines, Faculté des sciences et de génie, Université Laval, Québec, Canada G1K 7P4
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41
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Formaggio F, Oancea S, Peggion C, Crisma M, Toniolo C, Wright K, Wakselman M, Mazaleyrat JP. New tools for the control of peptide conformation and supramolecular chemistry: Crown-carrier, Cα-methyl L-DOPA amino acids. Biopolymers 2004; 71:667-74. [PMID: 14991676 DOI: 10.1002/bip.10594] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The preferred conformation of five, terminally protected, model peptide series to the hexamer level, based on three novel crowned, C(alpha)-methyl L-DOPA amino acids combined with either L-Ala/Aib or Gly/Aib, were assessed in structure supporting solvents using FT-IR absorption, (1)H NMR, and CD techniques. The FT-IR absorption spectra strongly suggest that the contribution of the crowned C(alpha)-tetrasubstituted residue to intramolecular H-bonding is equivalent to that of Aib and is much more significant than that of either L-Ala or Gly. In addition, the (1)H NMR titrations and the CD patterns resemble those typically exhibited by (right-handed) 3(10)-helical structures.
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Affiliation(s)
- Fernando Formaggio
- Institute of Biomolecular Chemistry, CNR, Department of Organic Chemistry, University of Padova, 35131 Padova, Italy.
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42
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Zhang G, Li Z, Wang M, He J, Cheng J. Design and Synthesis of Novel Amino Acid‐Bearing Macrocyclic Calix[4]Arenes. SYNTHETIC COMMUN 2004. [DOI: 10.1081/scc-200031049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- GuoZhu Zhang
- a Department of Chemistry , Nankai University , Tianjin, 300071, China
| | - ZuCheng Li
- a Department of Chemistry , Nankai University , Tianjin, 300071, China
| | - Min Wang
- a Department of Chemistry , Nankai University , Tianjin, 300071, China
| | - JiaQi He
- a Department of Chemistry , Nankai University , Tianjin, 300071, China
| | - JinPei Cheng
- a Department of Chemistry , Nankai University , Tianjin, 300071, China
- b State Key Laboratory of Element‐Organic Chemistry , Nankai University , Tianjin, 300071, China
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Willans CE, Mulders JM, de Vries JG, de Vries AH. Ligand-free palladium catalysed Heck reaction of methyl 2-acetamido acrylate and aryl bromides as key step in the synthesis of enantiopure substituted phenylalanines. J Organomet Chem 2003. [DOI: 10.1016/j.jorganchem.2003.09.012] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Posner PG, Motherwell PW. Tetrahedron reports on organic chemistry. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(03)01884-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Posner PG, Motherwell PW. Tetrahedron reports on organic chemistry. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(03)01130-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Posner PG, Motherwell PW. Tetrahedron reports on organic chemistry. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(03)00841-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Tetrahedron reports on organic chemistry. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(03)00323-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Wasserman HH, Long YO, Parr J. α,β-Diketo nitriles as dielectrophiles. Formation of heterocyclic derivatives of amino acids. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(02)02486-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Ivanov VT, Blishchenko EY, Sazonova OV, Karelin AA. What to synthesize? from Emil Fischer to peptidomics. J Pept Sci 2003; 9:553-62. [PMID: 14552418 DOI: 10.1002/psc.480] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The driving forces, incentives and strategic targets of peptide synthesis have undergone considerable evolution during the centenary following the pioneer work of Emil Fischer. In those days peptide synthesis was considered as a way of confirming the polypeptide theory of protein structure. The scientific community also expected (naively) that the synthesis would eventually lead to the creation of artificial living organisms. Only in the 1950s, when the first exact amino acid sequences were established did peptide chemistry obtain firmer ground and clearly defined targets. The total synthesis of peptide hormones and antibiotics became possible, providing valuable material for elucidating structure-functional relationships and the mechanisms of biological action. In the following years the number of peptides isolated from various biological sources grew with impressive speed and peptides became known as the most abundant, ubiquitous group of low molecular bioregulators. The design and synthesis of novel peptide based pharmaceuticals became an important area of peptide chemistry. At present we are facing the challenge of analysing the structures and bioactivities of total sets of peptides, i.e. peptidoms, present in concrete tissues or groups of cells. The results obtained along these lines at the IBCH RAS Institute of Bioorganic Chemistry are briefly considered in the review.
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Affiliation(s)
- Vadim T Ivanov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry RAS, Moscow, Russia.
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Posner G, Motherwell W. Tetrahedron reports on organic chemistry. Tetrahedron 2002. [DOI: 10.1016/s0040-4020(02)01503-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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