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Urbańczyk M, Jewgiński M, Krzciuk-Gula J, Góra J, Latajka R, Sewald N. Synthesis and conformational preferences of short analogues of antifreeze glycopeptides (AFGP). Beilstein J Org Chem 2019; 15:1581-1591. [PMID: 31435440 PMCID: PMC6664394 DOI: 10.3762/bjoc.15.162] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 06/12/2019] [Indexed: 01/01/2023] Open
Abstract
Antifreeze glycoproteins are a class of biological agents which enable living at temperatures below the freezing point of the body fluids. Antifreeze glycopeptides usually consist of repeating tripeptide unit (-Ala-Ala-Thr*-), glycosylated at the threonine side chain. However, on the microscopic level, the mechanism of action of these compounds remains unclear. As previous research has shown, antifreeze activity of antifreeze glycopeptides strongly relies on the overall conformation of the molecule as well an on the stereochemistry of amino acid residues. The desired monoglycosylated analogues with acetylated amino termini and the carboxy termini in form of N-methylamide have been synthesized. Conformational nuclear magnetic resonance (NMR) studies of the designed analogues have shown a strong influence of the stereochemistry of amino acid residues on the peptide chain stability, which could be connected to the antifreeze activity of these compounds. A better understanding of the mechanism of action of antifreeze glycopeptides would allow applying these materials, e.g., in food industry and biomedicine.
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Affiliation(s)
- Małgorzata Urbańczyk
- Department of Bioorganic Chemistry, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeże Wyspianskiego 27, Wroclaw, PL-50-370, Poland
| | - Michał Jewgiński
- Department of Bioorganic Chemistry, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeże Wyspianskiego 27, Wroclaw, PL-50-370, Poland
| | - Joanna Krzciuk-Gula
- Department of Bioorganic Chemistry, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeże Wyspianskiego 27, Wroclaw, PL-50-370, Poland
| | - Jerzy Góra
- Department of Bioorganic Chemistry, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeże Wyspianskiego 27, Wroclaw, PL-50-370, Poland
| | - Rafał Latajka
- Department of Bioorganic Chemistry, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeże Wyspianskiego 27, Wroclaw, PL-50-370, Poland
| | - Norbert Sewald
- Organic and Bioorganic Chemistry, Department of Chemistry, Bielefeld University, Universitätsstraße 25, Bielefeld, D-33615, Germany
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Kracker O, Góra J, Krzciuk-Gula J, Marion A, Neumann B, Stammler HG, Nieß A, Antes I, Latajka R, Sewald N. 1,5-Disubstituted 1,2,3-Triazole-Containing Peptidotriazolamers: Design Principles for a Class of Versatile Peptidomimetics. Chemistry 2017; 24:953-961. [PMID: 29160605 DOI: 10.1002/chem.201704583] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Indexed: 12/24/2022]
Abstract
Peptidotriazolamers are hybrid foldamers combining features of peptides and triazolamers-repetitive peptidomimetic structures with triazoles replacing peptide bonds. We report on the synthesis of a new class of peptidomimetics, containing 1,5-disubstituted 1,2,3-triazoles in an alternating fashion with amide bonds and the analysis of their conformation in solid state and solution. Homo- or heterochiral peptidotriazolamers were obtained from enantiomerically pure propargylamines with stereogenic centers in the propargylic position and α-azido esters by ruthenium-catalyzed azide-alkyne cycloaddition (RuAAC) under microwave conditions in high yields. With such building blocks the peptidotriazolamers are readily available by solution phase synthesis. While the conformation of the homochiral peptidotriazolamer Boc-Ala[5Tz]Phe-Val[5Tz]Ala-Leu[5Tz]Val-OBzl resembles that of a β VIa1 turn, the heterochiral peptidotriazolamer Boc-d-Ala[5Tz]Phe-d-Val[5Tz]Ala-d-Leu[5Tz]Val-OBzl adopts a polyproline-like repetitive structure.
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Affiliation(s)
- Oliver Kracker
- Organic and Bioorganic Chemistry, Department of Chemistry, Bielefeld University, PO Box 100131, 33501, Bielefeld, Germany
| | - Jerzy Góra
- Organic and Bioorganic Chemistry, Department of Chemistry, Bielefeld University, PO Box 100131, 33501, Bielefeld, Germany.,Department of Bioorganic Chemistry, Wrocław University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370, Wrocław, Poland
| | - Joanna Krzciuk-Gula
- Organic and Bioorganic Chemistry, Department of Chemistry, Bielefeld University, PO Box 100131, 33501, Bielefeld, Germany.,Department of Bioorganic Chemistry, Wrocław University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370, Wrocław, Poland
| | - Antoine Marion
- Center for Integrated Protein Science, Department of Biosciences, TU Munich, Emil-Erlenmeyer-Forum 8, 85354, Freising, Germany
| | - Beate Neumann
- Inorganic and Structural Chemistry, Department of Chemistry, Bielefeld University, PO Box 100131, 33501, Bielefeld, Germany
| | - Hans-Georg Stammler
- Inorganic and Structural Chemistry, Department of Chemistry, Bielefeld University, PO Box 100131, 33501, Bielefeld, Germany
| | - Anke Nieß
- Organic and Bioorganic Chemistry, Department of Chemistry, Bielefeld University, PO Box 100131, 33501, Bielefeld, Germany
| | - Iris Antes
- Center for Integrated Protein Science, Department of Biosciences, TU Munich, Emil-Erlenmeyer-Forum 8, 85354, Freising, Germany
| | - Rafał Latajka
- Department of Bioorganic Chemistry, Wrocław University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370, Wrocław, Poland
| | - Norbert Sewald
- Organic and Bioorganic Chemistry, Department of Chemistry, Bielefeld University, PO Box 100131, 33501, Bielefeld, Germany
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Jewgiński M, Krzciuk-Gula J, Makowski M, Latajka R, Kafarski P. Conformation of dehydropentapeptides containing four achiral amino acid residues - controlling the role of L-valine. Beilstein J Org Chem 2014; 10:660-6. [PMID: 24778717 PMCID: PMC3999861 DOI: 10.3762/bjoc.10.58] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Accepted: 02/05/2014] [Indexed: 12/01/2022] Open
Abstract
Structural studies of pentapeptides containing an achiral block, built from two dehydroamino acid residues (ΔZPhe and ΔAla) and two glycines, as well as one chiral L-Val residue were performed using NMR spectroscopy. The key role of the L-Val residue in the generation of the secondary structure of peptides is discussed. The obtained results suggest that the strongest influence on the conformation of peptides arises from a valine residue inserted at the C-terminal position. The most ordered conformation was found for peptide Boc-Gly-ΔAla-Gly-ΔZPhe-Val-OMe (3), which adopts a right-handed helical conformation.
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Affiliation(s)
- Michał Jewgiński
- Department of Bioorganic Chemistry, Faculty of Chemistry, Wrocław University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Joanna Krzciuk-Gula
- Department of Bioorganic Chemistry, Faculty of Chemistry, Wrocław University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Maciej Makowski
- Faculty of Chemistry, University of Opole, Oleska 48, 45-052 Opole, Poland
| | - Rafał Latajka
- Department of Bioorganic Chemistry, Faculty of Chemistry, Wrocław University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Paweł Kafarski
- Department of Bioorganic Chemistry, Faculty of Chemistry, Wrocław University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
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