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Zýka J, Prouza V, Habanová N, Pohl R, Parkan K. The synthesis and characterization of electron-poor glycosylamines and derived glycosylamides. Carbohydr Res 2024; 536:109023. [PMID: 38242070 DOI: 10.1016/j.carres.2024.109023] [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] [Received: 11/29/2023] [Revised: 12/26/2023] [Accepted: 01/04/2024] [Indexed: 01/21/2024]
Abstract
This paper describes a unified approach toward diglycosylamines using methanolic ammonia. All the glycosylamines prepared have been fully characterized, and their anomeric configuration has been determined. The article presents a novel method for the N-acylation of diglycosylamines and other electron-poor glycosylamines, which employs nitromethane as a solvent in carboxylic anhydride acylation under acidic conditions. The feasibility of this transformation is represented by a wide range of reaction substrates. All glycosylamides are formed solely with β-configuration. These two reactions constitute a simple and effective route to the synthesis of a novel class of compounds with an N-glycosidic linkage.
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Affiliation(s)
- Jakub Zýka
- Department of Chemistry of Natural Compounds, University of Chemistry and Technology, Prague, Technická 5, 166 28, Prague, Czech Republic; Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo Nám. 2, 166 10, Prague, Czech Republic
| | - Vít Prouza
- Department of Chemistry of Natural Compounds, University of Chemistry and Technology, Prague, Technická 5, 166 28, Prague, Czech Republic; Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo Nám. 2, 166 10, Prague, Czech Republic
| | - Nina Habanová
- Department of Analytical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28, Prague, Czech Republic; Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo Nám. 2, 166 10, Prague, Czech Republic
| | - Radek Pohl
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo Nám. 2, 166 10, Prague, Czech Republic
| | - Kamil Parkan
- Department of Chemistry of Natural Compounds, University of Chemistry and Technology, Prague, Technická 5, 166 28, Prague, Czech Republic; Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo Nám. 2, 166 10, Prague, Czech Republic.
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Glycosylamines-based reactive matrix designed for imaging acidity in Ponkan fruit using matrix assisted laser desorption/ionization mass spectrometry imaging. Anal Chim Acta 2018; 1041:78-86. [DOI: 10.1016/j.aca.2018.09.034] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 09/14/2018] [Accepted: 09/16/2018] [Indexed: 11/22/2022]
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Sharma A, Ramos‐Tomillero I, El‐Faham A, Nicolas E, Rodriguez H, de la Torre BG, Albericio F. Understanding Tetrahydropyranyl as a Protecting Group in Peptide Chemistry. ChemistryOpen 2017; 6:168-177. [PMID: 28413747 PMCID: PMC5390806 DOI: 10.1002/open.201600156] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2016] [Revised: 12/17/2016] [Indexed: 11/19/2022] Open
Abstract
Tetrahydropyranyl (Thp) is recognized as a useful protecting group for alcohols in organic synthesis. It has several advantages, including low cost, ease of introduction, general stability to most non-acidic reagents, it confers good solubility, and the ease with which it can be removed if the functional group it protects requires manipulation. However, little attention has been paid to Thp in peptide chemistry. Provided here is a concise analysis of the Thp protection of various amino acid functionalities (OH, SH, NH and COOH) and its application to peptide synthesis. Thp is a useful moiety for the side-chain protection of serine, threonine and cysteine and is suitable for the Fmoc/tBu solid-phase peptide synthesis strategy. The immobilized version of 3,4-dihydro-2H-pyran, the so-called Ellman resin, is also discussed as a useful solid support for anchoring the side chains of serine, threonine and tryptophan residues.
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Affiliation(s)
- Anamika Sharma
- Catalysis and Peptide Research UnitSchool of Health SciencesUniversity of KwaZulu-NatalDurban4001South Africa
| | - Iván Ramos‐Tomillero
- Inorganic and Organic Chemistry DepartmentUniversity of BarcelonaMartí Franqués 1—1108028BarcelonaSpain
| | - Ayman El‐Faham
- Department of ChemistryCollege of ScienceKing Saud UniversityP.O. Box 2455Riyadh11451Saudi Arabia
- Department of ChemistryFaculty of ScienceAlexandria UniversityP.O. Box 426, IbrahimiaAlexandria21321Egypt
| | - Ernesto Nicolas
- Inorganic and Organic Chemistry DepartmentUniversity of BarcelonaMartí Franqués 1—1108028BarcelonaSpain
| | | | - Beatriz G. de la Torre
- Catalysis and Peptide Research UnitSchool of Health SciencesUniversity of KwaZulu-NatalDurban4001South Africa
- School of Laboratory of Medicine & Medical SciencesUniversity of KwaZulu-NatalDurban4001South Africa
| | - Fernando Albericio
- Catalysis and Peptide Research UnitSchool of Health SciencesUniversity of KwaZulu-NatalDurban4001South Africa
- Inorganic and Organic Chemistry DepartmentUniversity of BarcelonaMartí Franqués 1—1108028BarcelonaSpain
- Department of ChemistryCollege of ScienceKing Saud UniversityP.O. Box 2455Riyadh11451Saudi Arabia
- School of Chemistry & PhysicsUniversity of KwaZulu-NatalDurban4001South Africa
- CIBER-BBN, Networking Centre on BioengineeringBiomaterials and NanomedicineBarcelona Science ParkBaldiri Reixac 10—1208028BarcelonaSpain
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Rzayev ZMO, Khalilova S, Salimi K. Folic acid conjugated and Ag-carrying organoclay nanoparticles and their response to L929 fibroblast and DLD-1 cancer cells. J Microencapsul 2016; 34:10-20. [PMID: 27901355 DOI: 10.1080/02652048.2016.1267812] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
This work presents the synthesis and characterisation of intercalated nanocomposites (NCs) from dispersed water solution blends of octadecyl amine-montmorillonite (ODA-MMT) (NC-0), folic acid (FA) conjugated ODA-MMT (NC-1) and Ag-MMT clay as a stable silver carrying agent (NC-2). The composition, chemical/physical and morphology of NCs with in situ intercalating nanostructures were investigated. Effect of organoclay, FA and Ag-MMT on L929 fibroblast (control), human colon carcinoma (DLD-1) cell lines, and the cytotoxicity, apoptosis and necrosis degree were estimated via WST-1/hemocytometric, double staining (as a ribonuclease A enzyme based method) and fluorescence microscopy methods in a dose-dependent manner. The mentioned cell lines integrated with NCs resulted in remarkable change in both morphology and nuclei of DLD-1 and fibroblast cells by apoptosis analysis. The number of necrotic cells were remarkably increased, as the toxic effects of nanocomposite nanoparticles were applied to both cell lines. Finally, the molecular mechanism of anticancer action of functionalised organoclays was elucidated.
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Affiliation(s)
- Zakir M O Rzayev
- a Institute of Science and Engineering, Division of Nanotechnology and Nanomedicine , Hacettepe University, Beytepe , Ankara , Turkey
| | - Sevda Khalilova
- b Ministry of Public Health , Scientific Research Institute of Medicinal Prophylaxis , Baku-Sumgait , Azerbaijan
| | - Kouroush Salimi
- c Department of Chemical Engineering, Faculty of Engineering , Hacettepe University, Beytepe Campus , Ankara , Turkey
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Catalano MJ, Liu S, Andersen N, Yang Z, Johnson KM, Price NE, Wang Y, Gates KS. Chemical structure and properties of interstrand cross-links formed by reaction of guanine residues with abasic sites in duplex DNA. J Am Chem Soc 2015; 137:3933-45. [PMID: 25710271 DOI: 10.1021/jacs.5b00669] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A new type of interstrand cross-link resulting from the reaction of a DNA abasic site with a guanine residue on the opposing strand of the double helix was recently identified, but the chemical connectivity of the cross-link was not rigorously established. The work described here was designed to characterize the chemical structure and properties of dG-AP cross-links generated in duplex DNA. The approach involved characterization of the nucleoside cross-link "remnant" released by enzymatic digestion of DNA duplexes containing the dG-AP cross-link. We first carried out a chemical synthesis and complete spectroscopic structure determination of the putative cross-link remnant 9b composed of a 2-deoxyribose adduct attached to the exocyclic N(2)-amino group of dG. A reduced analogue of the cross-link remnant was also prepared (11b). Liquid chromatography-tandem mass spectrometric (LC-MS/MS) analysis revealed that the retention times and mass spectral properties of synthetic standards 9b and 11b matched those of the authentic cross-link remnants released by enzymatic digestion of duplexes containing the native and reduced dG-AP cross-link, respectively. These results establish the chemical connectivity of the dG-AP cross-link released from duplex DNA and provide a foundation for detection of this lesion in biological samples. The dG-AP cross-link in duplex DNA was remarkably stable, decomposing with a half-life of 22 days at pH 7 and 23 °C. The intrinsic chemical stability of the dG-AP cross-link suggests that this lesion in duplex DNA may have the power to block DNA-processing enzymes involved in transcription and replication.
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Affiliation(s)
| | - Shuo Liu
- ‡Environmental Toxicology Graduate Program and Department of Chemistry, University of California-Riverside, Riverside, California 92521-0403, United States
| | - Nisana Andersen
- ‡Environmental Toxicology Graduate Program and Department of Chemistry, University of California-Riverside, Riverside, California 92521-0403, United States
| | | | | | | | - Yinsheng Wang
- ‡Environmental Toxicology Graduate Program and Department of Chemistry, University of California-Riverside, Riverside, California 92521-0403, United States
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Avegno EAB, Hasty SJ, Parameswar AR, Howarth GS, Demchenko AV, Byers LD. Reactive thioglucoside substrates for β-glucosidase. Arch Biochem Biophys 2013; 537:1-4. [PMID: 23811198 PMCID: PMC3755622 DOI: 10.1016/j.abb.2013.06.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2012] [Revised: 06/14/2013] [Accepted: 06/16/2013] [Indexed: 02/07/2023]
Abstract
A new, very efficient, class of thioglycoside substrates has been found for β-glucosidase. While thioglycosides are usually resistant to hydrolysis, even in the presence of acids or most glycohydrolases, the β-D-glucopyranosides of 2-mercaptobenzimidazole (GlcSBiz) and 2-mercaptobenzoxazole (GlcSBox) have been found to be excellent substrates for β-glucosidase from both sweet almond (a family 1 glycohydrolase) and Aspergillus niger (a family 3 glycohydrolase), reacting nearly as well as p-nitrophenyl β-D-glucoside. The enzyme-catalyzed hydrolysis of GlcSBiz proceeds with retention of configuration. As with the (1000-fold slower) hydrolysis of phenyl thioglucosides catalyzed by the almond enzyme, the pL (pH/pD)-independent kcat/KM does not show a detectable solvent deuterium kinetic isotope effect (SKIE), but unlike the hydrolysis of phenyl thioglucosides, a modest SKIE is seen on kcat [(D2O)kcat=1.28 (±0.06)] at the pL optimum (5.5≤pL≤6.6). A solvent isotope effect is also seen on the KM for the N-methyl analog of GlcSBiz. These results suggest that the mechanism for the hydrolysis of the β-thioglucoside of 2-mercaptobenzimidazole and of 2-mercaptobenzoxazole involves remote site protonation (at the ring nitrogen) followed by cleavage of the thioglucosidic bond resulting in the thione product.
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Affiliation(s)
| | - Scott J. Hasty
- Department of Chemistry and Biochemistry, University of Missouri-St. Louis, MO 63121
| | - Archana R. Parameswar
- Department of Chemistry and Biochemistry, University of Missouri-St. Louis, MO 63121
| | - Gary S. Howarth
- Department of Chemistry, Tulane University, New Orleans, LA 70118
| | - Alexei V. Demchenko
- Department of Chemistry and Biochemistry, University of Missouri-St. Louis, MO 63121
| | - Larry D. Byers
- Department of Chemistry, Tulane University, New Orleans, LA 70118
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