1
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Mirloup A, Berthomé Y, Riché S, Wagner P, Hanser F, Laurent A, Iturrioz X, Llorens-Cortes C, Karpenko J, Bonnet D. Alared: Solvatochromic and Fluorogenic Red Amino Acid for Ratiometric Live-Cell Imaging of Bioactive Peptides. Chemistry 2024; 30:e202401296. [PMID: 38641990 DOI: 10.1002/chem.202401296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Accepted: 04/17/2024] [Indexed: 04/21/2024]
Abstract
To fill the need for environmentally sensitive fluorescent unnatural amino acids able to operate in the red region of the spectrum, we have designed and synthesized Alared, a red solvatochromic and fluorogenic amino acid derived from the Nile Red chromophore. The new unnatural amino acid can be easily integrated into bioactive peptides using classical solid-phase peptide synthesis. The fluorescence quantum yield and the emission maximum of Alared-labeled peptides vary in a broad range depending on the peptide's environment, making Alared a powerful reporter of biomolecular interactions. Due to its red-shifted absorption and emission spectra, Alared-labeled peptides could be followed in living cells with minimal interference from cellular autofluorescence. Using ratiometric fluorescence microscopy, we were able to track the fate of the Alared-labeled peptide agonists of the apelin G protein-coupled receptor upon receptor activation and internalization. Due to its color-shifting environmentally sensitive emission, Alared allowed for distinguishing the fractions of peptides that are specifically bound to the receptor or unspecifically bound to different cellular membranes.
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Affiliation(s)
- Antoine Mirloup
- Laboratoire d'Innovation Thérapeutique, UMR7200 CNRS/, Université de Strasbourg, Institut du Médicament de Strasbourg, 74 route du Rhin, F-67000, Strasbourg, France
| | - Yann Berthomé
- Laboratoire d'Innovation Thérapeutique, UMR7200 CNRS/, Université de Strasbourg, Institut du Médicament de Strasbourg, 74 route du Rhin, F-67000, Strasbourg, France
| | - Stéphanie Riché
- Laboratoire d'Innovation Thérapeutique, UMR7200 CNRS/, Université de Strasbourg, Institut du Médicament de Strasbourg, 74 route du Rhin, F-67000, Strasbourg, France
| | - Patrick Wagner
- Laboratoire d'Innovation Thérapeutique, UMR7200 CNRS/, Université de Strasbourg, Institut du Médicament de Strasbourg, 74 route du Rhin, F-67000, Strasbourg, France
| | - Fabien Hanser
- Laboratoire d'Innovation Thérapeutique, UMR7200 CNRS/, Université de Strasbourg, Institut du Médicament de Strasbourg, 74 route du Rhin, F-67000, Strasbourg, France
| | - Arthur Laurent
- Laboratoire d'Innovation Thérapeutique, UMR7200 CNRS/, Université de Strasbourg, Institut du Médicament de Strasbourg, 74 route du Rhin, F-67000, Strasbourg, France
| | - Xavier Iturrioz
- Université Paris Saclay, CEA, INRAE, Medicines and Technologies for Health Department, SIMoS, F-91190, Gif-sur-Yvette, France
| | - Catherine Llorens-Cortes
- Université Paris Saclay, CEA, INRAE, Medicines and Technologies for Health Department, SIMoS, F-91190, Gif-sur-Yvette, France
- Laboratory of Central Neuropeptides in the Regulation of Body Fluid Homeostasis and Cardiovascular Functions, College de France, INSERM U1050/CNRS UMR7241, 11 Place Marcelin Berthelot, 75005, Paris, France
| | - Julie Karpenko
- Laboratoire d'Innovation Thérapeutique, UMR7200 CNRS/, Université de Strasbourg, Institut du Médicament de Strasbourg, 74 route du Rhin, F-67000, Strasbourg, France
| | - Dominique Bonnet
- Laboratoire d'Innovation Thérapeutique, UMR7200 CNRS/, Université de Strasbourg, Institut du Médicament de Strasbourg, 74 route du Rhin, F-67000, Strasbourg, France
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2
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Kyrychenko A, Ladokhin AS. Fluorescent Probes and Quenchers in Studies of Protein Folding and Protein-Lipid Interactions. CHEM REC 2024; 24:e202300232. [PMID: 37695081 PMCID: PMC11113672 DOI: 10.1002/tcr.202300232] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 08/20/2023] [Indexed: 09/12/2023]
Abstract
Fluorescence spectroscopy provides numerous methodological tools for structural and functional studies of biological macromolecules and their complexes. All fluorescence-based approaches require either existence of an intrinsic probe or an introduction of an extrinsic one. Moreover, studies of complex systems often require an additional introduction of a specific quencher molecule acting in combination with a fluorophore to provide structural or thermodynamic information. Here, we review the fundamentals and summarize the latest progress in applications of different classes of fluorescent probes and their specific quenchers, aimed at studies of protein folding and protein-membrane interactions. Specifically, we discuss various environment-sensitive dyes, FRET probes, probes for short-distance measurements, and several probe-quencher pairs for studies of membrane penetration of proteins and peptides. The goals of this review are: (a) to familiarize the readership with the general concept that complex biological systems often require both a probe and a quencher to decipher mechanistic details of functioning and (b) to provide example of the immediate applications of the described methods.
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Affiliation(s)
- Alexander Kyrychenko
- Institute of Chemistry and School of Chemistry, V. N. Karazin Kharkiv National University, 4 Svobody sq., Kharkiv, 61022, Ukraine
| | - Alexey S Ladokhin
- Department of Biochemistry and Molecular Biology, The University of Kansas Medical Center, 3901 Rainbow Boulevard, Kansas City, KS, 66160, United States
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3
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Pivovarenko VG, Klymchenko AS. Fluorescent Probes Based on Charge and Proton Transfer for Probing Biomolecular Environment. CHEM REC 2024; 24:e202300321. [PMID: 38158338 DOI: 10.1002/tcr.202300321] [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: 10/08/2023] [Revised: 12/11/2023] [Indexed: 01/03/2024]
Abstract
Fluorescent probes for sensing fundamental properties of biomolecular environment, such as polarity and hydration, help to study assembly of lipids into biomembranes, sensing interactions of biomolecules and imaging physiological state of the cells. Here, we summarize major efforts in the development of probes based on two photophysical mechanisms: (i) an excited-state intramolecular charge transfer (ICT), which is represented by fluorescent solvatochromic dyes that shift their emission band maximum as a function of environment polarity and hydration; (ii) excited-state intramolecular proton transfer (ESIPT), with particular focus on 5-membered cyclic systems, represented by 3-hydroxyflavones, because they exhibit dual emission sensitive to the environment. For both ICT and ESIPT dyes, the design of the probes and their biological applications are summarized. Thus, dyes bearing amphiphilic anchors target lipid membranes and report their lipid organization, while targeting ligands direct them to specific organelles for sensing their local environment. The labels, amino acid and nucleic acid analogues inserted into biomolecules enable monitoring their interactions with membranes, proteins and nucleic acids. While ICT probes are relatively simple and robust environment-sensitive probes, ESIPT probes feature high information content due their dual emission. They constitute a powerful toolbox for addressing multitude of biological questions.
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Affiliation(s)
- Vasyl G Pivovarenko
- Department of Chemistry, Kyiv National Taras Shevchenko University, 01033, Kyiv, Ukraine
| | - Andrey S Klymchenko
- Laboratoire de Bioimagerie et Pathologies, UMR 7021 CNRS, ITI SysChem, Université de Strasbourg, 67401, Illkirch, France
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4
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Dodds AC, Sansom HG, Magennis SW, Sutherland A. Synthesis of Thiazoloindole α-Amino Acids: Chromophores Amenable to One- and Two-Photon Induced Fluorescence. Org Lett 2023; 25:8942-8946. [PMID: 38055619 PMCID: PMC10729019 DOI: 10.1021/acs.orglett.3c03851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/02/2023] [Accepted: 12/05/2023] [Indexed: 12/08/2023]
Abstract
Thiazoloindole α-amino acids have been synthesized in four steps from tryptophan using a dual-catalytic thiolation reaction and a copper-mediated intramolecular N-arylation process. Late-stage diversification of the thiazoloindole core with electron-deficient aryl substituents produced chromophores that on one-photon excitation displayed blue-green emission, mega-Stokes shifts, and high quantum yields. The thiazoloindole amino acids could also be excited via two-photon absorption in the near-infrared, demonstrating their potential for biomedical imaging applications.
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Affiliation(s)
- Amy C. Dodds
- School of Chemistry, The Joseph Black
Building, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - Henry G. Sansom
- School of Chemistry, The Joseph Black
Building, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - Steven W. Magennis
- School of Chemistry, The Joseph Black
Building, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - Andrew Sutherland
- School of Chemistry, The Joseph Black
Building, University of Glasgow, Glasgow G12 8QQ, United Kingdom
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5
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McGrory R, Morgan DC, Jamieson AG, Sutherland A. Rotamer-Controlled Dual Emissive α-Amino Acids. Org Lett 2023; 25:5844-5849. [PMID: 37506290 PMCID: PMC10425982 DOI: 10.1021/acs.orglett.3c02112] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Indexed: 07/30/2023]
Abstract
The synthesis and photoluminescent properties of novel α-amino acids are described in which the biaryl benzotriazinone-containing chromophores were found to display dual emission fluorescence via locally excited (LE) and twisted intramolecular charge transfer (TICT) states. The intensity of each emission band could be controlled by the electronics and position of the substituents, and this led to the design of a 2-methoxyphenyl analogue that, due to twisting, displayed bright TICT fluorescence, solvatochromism, and pH sensitivity.
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Affiliation(s)
- Rochelle McGrory
- School
of Chemistry, The Joseph Black Building, University of Glasgow, Glasgow G12 8QQ, United
Kingdom
| | - Danielle C. Morgan
- School
of Chemistry, Advanced Research Centre, University of Glasgow, Glasgow G11 6EW, United
Kingdom
| | - Andrew G. Jamieson
- School
of Chemistry, Advanced Research Centre, University of Glasgow, Glasgow G11 6EW, United
Kingdom
| | - Andrew Sutherland
- School
of Chemistry, The Joseph Black Building, University of Glasgow, Glasgow G12 8QQ, United
Kingdom
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6
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Pivovarenko VG. Multi-parametric sensing by multi-channel molecular fluorescent probes based on excited state intramolecular proton transfer and charge transfer processes. BBA ADVANCES 2023; 3:100094. [PMID: 37347000 PMCID: PMC10279795 DOI: 10.1016/j.bbadva.2023.100094] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 05/26/2023] [Indexed: 06/23/2023] Open
Abstract
Considering the applications of fluorescent probes and the information they provide, their brightness of fluorescence and photostability are of paramount importance. However, in the case of steady-state fluorescence spectroscopy and fluorescence microscopy, the amount of information can be increased by the application of multi-channel probes, via a multi-band fluorophore introduced in the probe molecule. In most cases, the use of such a multi-band (or multi-channel) fluorophore can also be combined with the concomitant introduction of one or several analyte receptors. Most often, the design of ratiometric probes with multi-band fluorescence emission are based on phenomena such as photoinduced intramolecular charge transfer (ICT) or excited state intramolecular proton transfer (ESIPT). Although ICT probes were up to recently the most popular, ESIPT probes and among them 3-hydroxyflavone derivatives, were shown to be the most productive. Several general problems were resolved by this family of probes, as for example the measurement of local dielectric constant, local H-bond accepting ability, water local concentration and ATP concentration in small volumes. Incorporation of such multi-channel probes into lipid membranes allowed to measure the different membrane potentials and to detect cell apoptosis. Also, it enabled to recognize and characterize the rafts formation in different lipid bilayers and peculiar features of the charged membrane interface. Such probes are also able to provide a concentration-dependent fluorescence signals upon binding of H+, Mg2+and Ba2+ions, and thus to recognize these different cations. The multi-channel probes are effective tools in the study of interactions of macromolecules such as peptides, proteins and nucleic acids. The most useful feature is that they inform simultaneously about several physical parameters, in this way giving a better insight in the investigated system. Thus, by comparing the reviewed probes with other modern fluorescent approaches, it can be concluded they are more informative and accurate tools.
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7
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Melittin Tryptophan Substitution with a Fluorescent Amino Acid Reveals the Structural Basis of Selective Antitumor Effect and Subcellular Localization in Tumor Cells. Toxins (Basel) 2022; 14:toxins14070428. [PMID: 35878166 PMCID: PMC9318513 DOI: 10.3390/toxins14070428] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Revised: 06/14/2022] [Accepted: 06/19/2022] [Indexed: 02/01/2023] Open
Abstract
Melittin is a membrane-active peptide with strong anticancer activity against various cancers. Despite decades of research, the role of the singular Trp in the anticancer activity and selectivity of melittin remains poorly understood. Here, we propose a theranostic solution based on the substitution of Trp19 with a noncanonical fluorescent amino acid (DapAMCA). The introduction of DapAMCA residue in melittin stabilized the helical structure of the peptide, as evaluated by circular dichroism spectra and molecular dynamics simulations. In vitro hemolytic and anticancer activity assays revealed that introducing DapAMCA residue in melittin changed its mode of action with the cell membrane, resulting in reduced hemolytic toxicity and an improved the selectivity index (SI), with up to a five-fold increase compared to melittin. In vitro fluorescence imaging of DapAMCA-labeled melittin (MELFL) in cancer cells demonstrated high membrane-penetrating activity, with strong nuclear and nucleolar localization ability. These findings provide implications for novel anticancer therapies based on Trp-substituted designs and nuclear/nucleolar targeted therapy.
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8
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Akbarzadeh-Khiavi M, Torabi M, Olfati AH, Rahbarnia L, Safary A. Bio-nano scale modifications of melittin for improving therapeutic efficacy. Expert Opin Biol Ther 2022; 22:895-909. [PMID: 35687355 DOI: 10.1080/14712598.2022.2088277] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
INTRODUCTION Melittin (MLT), a natural membrane-active component, is the most prominent cytolytic peptide from bee venom. Remarkable biological properties of MLT, including anti-inflammatory, antimicrobial, anticancer, anti-protozoan, and antiarthritic activities, make it an up-and-coming therapeutic candidate for a wide variety of human diseases. Therapeutic applications of MLT may be hindered due to low stability, high toxicity, and weak tissue penetration. Different bio-nano scale modifications hold promise for improving its functionality and therapeutic efficacy. AREAS COVERED In the current review, we aimed to provide a comprehensive insight into strategies used for MLT conjugations and modifications, cellular delivery of modified forms, and their clinical perspectives by reviewing the published literature on PubMed, Scopus, and Google Scholar databases. We also emphasized the MLT structure modifications, mechanism of action, and cellular toxicity. EXPERT OPINION Developing new analogs and conjugates of MLT as a natural drug with improved functions and fewer side effects is crucial for the clinical translation of this approach worldwide, especially where the chemicals and synthetic drugs are more expensive or unavailable in the healthcare system. MLT-nanoconjugation may be one of the best-optimized strategies for improving peptide delivery, increasing its therapeutic efficacy, and providing minimal nonspecific cellular lytic activity. [Figure: see text].
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Affiliation(s)
- Mostafa Akbarzadeh-Khiavi
- Liver and Gastrointestinal Diseases Research Center Tabriz University of Medical Sciences, Tabriz, Iran.,Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mitra Torabi
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Amir-Hossein Olfati
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Leila Rahbarnia
- Infectious and Tropical Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Azam Safary
- Connective Tissue Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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9
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Rashid P, Sanjayan GJ. A multi-purpose synthetic α-amino acid featuring coumarin and ureidopyrimidinone motifs on its backbone: Synthesis and peptide formation. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153695] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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Matyašovský J, Tack L, Palágyi A, Kuba M, Pohl R, Kraus T, Güixens-Gallardo P, Hocek M. Nucleotides bearing aminophenyl- or aminonaphthyl-3-methoxychromone solvatochromic fluorophores for the enzymatic construction of DNA probes for the detection of protein-DNA binding. Org Biomol Chem 2021; 19:9966-9974. [PMID: 34747967 DOI: 10.1039/d1ob02098f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We designed and synthesized nucleosides bearing aminophenyl- or aminonaphthyl-3-methoxychromone fluorophores attached at position 5 of cytosine or thymine and converted them to nucleoside triphosphates. The fluorophores showed solvatochromic fluorescence with strong fluorescence at 433-457 nm in non-polar solvents and very weak fluorescence at 567 nm in alcohols. The nucleosides and nucleotides also showed only negligible fluorescence in alcohols or water. The triphosphates were substrates for DNA polymerase in the enzymatic synthesis of modified DNA probes that showed only very weak fluorescence in aqueous buffer but a significant light-up and blue shift were observed when they interacted with proteins (histone H3.1 or p53 for double-stranded DNA probes or single-strand binding protein for single-stranded oligonucleotide probes). Hence, nucleotides have good potential in the construction of DNA sensors for studying protein-DNA interactions. The modified dNTPs were also transported into cells using a cyclodextrin-based transporter but they were not incorporated into the genomic DNA.
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Affiliation(s)
- Ján Matyašovský
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo Namesti 2, CZ-16610 Prague 6, Czech Republic. .,Department of Organic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, Prague-2 12843, Czech Republic
| | - Laure Tack
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo Namesti 2, CZ-16610 Prague 6, Czech Republic.
| | - Attila Palágyi
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo Namesti 2, CZ-16610 Prague 6, Czech Republic. .,Department of Organic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, Prague-2 12843, Czech Republic
| | - Miroslav Kuba
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo Namesti 2, CZ-16610 Prague 6, Czech Republic. .,Department of Organic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, Prague-2 12843, Czech Republic
| | - Radek Pohl
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo Namesti 2, CZ-16610 Prague 6, Czech Republic.
| | - Tomáš Kraus
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo Namesti 2, CZ-16610 Prague 6, Czech Republic.
| | - Pedro Güixens-Gallardo
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo Namesti 2, CZ-16610 Prague 6, Czech Republic. .,Department of Organic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, Prague-2 12843, Czech Republic
| | - Michal Hocek
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo Namesti 2, CZ-16610 Prague 6, Czech Republic. .,Department of Organic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, Prague-2 12843, Czech Republic
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11
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Afonin S, Koniev S, Préau L, Takamiya M, Strizhak AV, Babii O, Hrebonkin A, Pivovarenko VG, Dathe M, le Noble F, Rastegar S, Strähle U, Ulrich AS, Komarov IV. In Vivo Behavior of the Antibacterial Peptide Cyclo[RRRWFW], Explored Using a 3-Hydroxychromone-Derived Fluorescent Amino Acid. Front Chem 2021; 9:688446. [PMID: 34262894 PMCID: PMC8273159 DOI: 10.3389/fchem.2021.688446] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 06/11/2021] [Indexed: 11/20/2022] Open
Abstract
Labeling biomolecules with fluorescent labels is an established tool for structural, biochemical, and biophysical studies; however, it remains underused for small peptides. In this work, an amino acid bearing a 3-hydroxychromone fluorophore, 2-amino-3-(2-(furan-2-yl)-3-hydroxy-4-oxo-4H-chromen-6-yl)propanoic acid (FHC), was incorporated in a known hexameric antimicrobial peptide, cyclo[RRRWFW] (cWFW), in place of aromatic residues. Circular dichroism spectropolarimetry and antibacterial activity measurements demonstrated that the FHC residue perturbs the peptide structure depending on labeling position but does not modify the activity of cWFW significantly. FHC thus can be considered an adequate label for studies of the parent peptide. Several analytical and imaging techniques were used to establish the activity of the obtained labeled cWFW analogues toward animal cells and to study the behavior of the peptides in a multicellular organism. The 3-hydroxychromone fluorophore can undergo excited-state intramolecular proton transfer (ESIPT), resulting in double-band emission from its two tautomeric forms. This feature allowed us to get insights into conformational equilibria of the labeled peptides, localize the cWFW analogues in human cells (HeLa and HEK293) and zebrafish embryos, and assess the polarity of the local environment around the label by confocal fluorescence microscopy. We found that the labeled peptides efficiently penetrated cancerous cells and localized mainly in lipid-containing and/or other nonpolar subcellular compartments. In the zebrafish embryo, the peptides remained in the bloodstream upon injection into the cardinal vein, presumably adhering to lipoproteins and/or microvesicles. They did not diffuse into any tissue to a significant extent during the first 3 h after administration. This study demonstrated the utility of fluorescent labeling by double-emission labels to evaluate biologically active peptides as potential drug candidates in vivo.
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Affiliation(s)
- Sergii Afonin
- Institute of Biological Interfaces (IBG-2), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Serhii Koniev
- Institute of Biological Interfaces (IBG-2), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
- Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
- Enamine, Kyiv, Ukraine
| | - Laetitia Préau
- Institute of Zoology (ZOO), Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Masanari Takamiya
- Institute of Biological and Chemical Systems, Biological Information Processing (IBCS-BIP), Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Alexander V. Strizhak
- Institute of Biological Interfaces (IBG-2), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
- Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
- Enamine, Kyiv, Ukraine
| | - Oleg Babii
- Institute of Biological Interfaces (IBG-2), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Andrii Hrebonkin
- Institute of Organic Chemistry (IOC), Karlsruhe Institute of Technology, Karlsruhe, Germany
| | | | - Margitta Dathe
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, (FMP), Berlin, Germany
| | - Ferdinand le Noble
- Institute of Zoology (ZOO), Karlsruhe Institute of Technology, Karlsruhe, Germany
- Institute of Biological and Chemical Systems, Biological Information Processing (IBCS-BIP), Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Sepand Rastegar
- Institute of Biological and Chemical Systems, Biological Information Processing (IBCS-BIP), Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Uwe Strähle
- Institute of Biological and Chemical Systems, Biological Information Processing (IBCS-BIP), Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Anne S. Ulrich
- Institute of Biological Interfaces (IBG-2), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
- Institute of Organic Chemistry (IOC), Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Igor V. Komarov
- Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
- Enamine, Kyiv, Ukraine
- Lumobiotics, Karlsruhe, Germany
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12
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Shaydyuk Y, Bashmakova NV, Dmytruk AM, Kachkovsky OD, Koniev S, Strizhak AV, Komarov IV, Belfield KD, Bondar MV, Babii O. Nature of Fast Relaxation Processes and Spectroscopy of a Membrane-Active Peptide Modified with Fluorescent Amino Acid Exhibiting Excited State Intramolecular Proton Transfer and Efficient Stimulated Emission. ACS OMEGA 2021; 6:10119-10128. [PMID: 34056166 PMCID: PMC8153670 DOI: 10.1021/acsomega.1c00193] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 02/25/2021] [Indexed: 06/12/2023]
Abstract
A fluorescently labeled peptide that exhibited fast excited state intramolecular proton transfer (ESIPT) was synthesized, and the nature of its electronic properties was comprehensively investigated, including linear photophysical and photochemical characterization, specific relaxation processes in the excited state, and its stimulated emission ability. The steady-state absorption, fluorescence, and excitation anisotropy spectra, along with fluorescence lifetimes and emission quantum yields, were obtained in liquid media and analyzed based on density functional theory quantum-chemical calculations. The nature of ESIPT processes of the peptide's chromophore moiety was explored using a femtosecond transient absorption pump-probe technique, revealing relatively fast ESIPT velocity (∼10 ps) in protic MeOH at room temperature. Efficient superluminescence properties of the peptide were realized upon femtosecond excitation in the main long-wavelength absorption band with a corresponding threshold of the pump pulse energy of ∼1.5 μJ. Quantum-chemical analysis of the electronic structure of the peptide was performed using the density functional theory/time-dependent density functional theory level of theory, affording good agreement with experimental data.
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Affiliation(s)
- Yevgeniy
O. Shaydyuk
- Institute
of Physics National Academy of Sciences of Ukraine, Prospect Nauki 46, Kyiv 03028, Ukraine
| | - Nataliia V. Bashmakova
- Taras
Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyiv 01601, Ukraine
| | - Andriy M. Dmytruk
- Institute
of Physics National Academy of Sciences of Ukraine, Prospect Nauki 46, Kyiv 03028, Ukraine
| | - Olexiy D. Kachkovsky
- V.P.
Kukhar Institute of Bioorganic Chemistry and Petrochemistry of the
National Academy of Sciences, Murmanskaya Street 1, Kyiv 02660, Ukraine
| | - Serhii Koniev
- Taras
Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyiv 01601, Ukraine
| | | | - Igor V. Komarov
- Taras
Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyiv 01601, Ukraine
| | - Kevin D. Belfield
- New
Jersey Institute of Technology, College of Science and Liberal Arts, University Heights, Newark, New Jersey 07102, United States
| | - Mykhailo V. Bondar
- Institute
of Physics National Academy of Sciences of Ukraine, Prospect Nauki 46, Kyiv 03028, Ukraine
| | - Oleg Babii
- Institute
of Biological Interfaces (IBG-2), Karlsruhe
Institute of Technology (KIT), POB3640, Karlsruhe 76021, Germany
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13
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Xiong Y, Shi C, Li L, Tang Y, Zhang X, Liao S, Zhang B, Sun C, Ren C. A review on recent advances in amino acid and peptide-based fluorescence and its potential applications. NEW J CHEM 2021. [DOI: 10.1039/d1nj02230j] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Fluorescence is widely used to detect functional groups and ions, and peptides are used in various fields due to their excellent biological activity.
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Affiliation(s)
- Yingshuo Xiong
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Changxin Shi
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Lingyi Li
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Yuanhan Tang
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Xin Zhang
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Sisi Liao
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Beibei Zhang
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Changmei Sun
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Chunguang Ren
- Yantai Institute of Materia Medica, Yantai 264000, China
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14
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Fluorescent amino acids as versatile building blocks for chemical biology. Nat Rev Chem 2020; 4:275-290. [PMID: 37127957 DOI: 10.1038/s41570-020-0186-z] [Citation(s) in RCA: 91] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/14/2020] [Indexed: 12/13/2022]
Abstract
Fluorophores have transformed the way we study biological systems, enabling non-invasive studies in cells and intact organisms, which increase our understanding of complex processes at the molecular level. Fluorescent amino acids have become an essential chemical tool because they can be used to construct fluorescent macromolecules, such as peptides and proteins, without disrupting their native biomolecular properties. Fluorescent and fluorogenic amino acids with unique photophysical properties have been designed for tracking protein-protein interactions in situ or imaging nanoscopic events in real time with high spatial resolution. In this Review, we discuss advances in the design and synthesis of fluorescent amino acids and how they have contributed to the field of chemical biology in the past 10 years. Important areas of research that we review include novel methodologies to synthesize building blocks with tunable spectral properties, their integration into peptide and protein scaffolds using site-specific genetic encoding and bioorthogonal approaches, and their application to design novel artificial proteins, as well as to investigate biological processes in cells by means of optical imaging.
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15
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Bell JD, Harkiss AH, Nobis D, Malcolm E, Knuhtsen A, Wellaway CR, Jamieson AG, Magennis SW, Sutherland A. Conformationally rigid pyrazoloquinazoline α-amino acids: one- and two-photon induced fluorescence. Chem Commun (Camb) 2020; 56:1887-1890. [DOI: 10.1039/c9cc09064a] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Conformationally rigid unnatural α-amino acids bearing a pyrazoloquinazoline ring system that are amenable to both one- and two-photon excitation have been developed as new fluorescent probes.
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Affiliation(s)
- Jonathan D. Bell
- WestCHEM
- School of Chemistry
- The Joseph Black Building
- University of Glasgow
- Glasgow
| | - Alexander H. Harkiss
- WestCHEM
- School of Chemistry
- The Joseph Black Building
- University of Glasgow
- Glasgow
| | - David Nobis
- WestCHEM
- School of Chemistry
- The Joseph Black Building
- University of Glasgow
- Glasgow
| | - Eilidh Malcolm
- WestCHEM
- School of Chemistry
- The Joseph Black Building
- University of Glasgow
- Glasgow
| | - Astrid Knuhtsen
- WestCHEM
- School of Chemistry
- The Joseph Black Building
- University of Glasgow
- Glasgow
| | | | - Andrew G. Jamieson
- WestCHEM
- School of Chemistry
- The Joseph Black Building
- University of Glasgow
- Glasgow
| | - Steven W. Magennis
- WestCHEM
- School of Chemistry
- The Joseph Black Building
- University of Glasgow
- Glasgow
| | - Andrew Sutherland
- WestCHEM
- School of Chemistry
- The Joseph Black Building
- University of Glasgow
- Glasgow
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16
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Hao J, Yang Y. Dynamic Excited-State Intramolecular Proton Transfer Mechanisms of Two Novel 3-Hydroxyflavone-Based Chromophores in Two Different Surroundings. J Phys Chem A 2019; 123:3937-3948. [DOI: 10.1021/acs.jpca.9b00879] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Jiaojiao Hao
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Yang Yang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
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17
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Chen Y, Yang Y, Zhao Y, Liu S, Li Y. The effect of different environments on excited-state intramolecular proton transfer in 4′-methoxy-3-hydroxyflavone. Org Chem Front 2019. [DOI: 10.1039/c8qo01111g] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Excited state intramolecular proton transfer reaction occurs with increasing difficulty in the solvents tested in the order toluene → ACN → DMF.
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Affiliation(s)
- Yunpeng Chen
- Department of Physics
- Liaoning University
- Shenyang 110036
- P. R. China
| | - Yunfan Yang
- Department of Physics
- Liaoning University
- Shenyang 110036
- P. R. China
| | - Yu Zhao
- Department of Physics
- Liaoning University
- Shenyang 110036
- P. R. China
| | - Shixing Liu
- Department of Physics
- Liaoning University
- Shenyang 110036
- P. R. China
| | - Yongqing Li
- Department of Physics
- Liaoning University
- Shenyang 110036
- P. R. China
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18
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Skilitsi AI, Agathangelou D, Shulov I, Conyard J, Haacke S, Mély Y, Klymchenko A, Léonard J. Ultrafast photophysics of the environment-sensitive 4'-methoxy-3-hydroxyflavone fluorescent dye. Phys Chem Chem Phys 2018; 20:7885-7895. [PMID: 29509200 DOI: 10.1039/c7cp08584b] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The excited state intramolecular proton transfer (ESIPT) of 3-hydroxyflavone derivatives results in a fluorescence spectrum composed of two emission bands, the relative intensity of which is strongly influenced by the interaction with the local environment. We use time-resolved fluorescence and ultrafast transient absorption spectroscopies to investigate the photophysics of 4'-methoxy-3-hydroxyflavone in different solvents characterized by various polarities and hydrogen (H) bonding capabilities. We evidence that in this compound, the ESIPT reaction rate varies by more than 3 orders of magnitude, depending on the H-bonding capability of its local environment. This remarkable property is attributed to the moderate electron-donating strength of the 4'-methoxy substituent, and turns this fluorescent dye into a very promising fluorescent probe of biomolecular structures and interactions, where local structural heterogeneity may possibly be revealed by resolving a distribution of ESIPT reaction rates.
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Affiliation(s)
- Anastasia Ioanna Skilitsi
- Institut de Physique et Chimie des Matériaux de Strasbourg, & Labex NIE CNRS Université de Strasbourg, Strasbourg, France.
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19
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Bi X, Liu B, McDonald L, Pang Y. Excited-State Intramolecular Proton Transfer (ESIPT) of Fluorescent Flavonoid Dyes: A Close Look by Low Temperature Fluorescence. J Phys Chem B 2017; 121:4981-4986. [DOI: 10.1021/acs.jpcb.7b01885] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Xiaoman Bi
- Department of Chemistry & Maurice Morton Institute of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Bin Liu
- Shenzhen
Key Laboratory of Special Functional Materials, College of Materials
Science and Engineering, Shenzhen University, Shenzhen 518060, China
| | - Lucas McDonald
- Department of Chemistry & Maurice Morton Institute of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Yi Pang
- Department of Chemistry & Maurice Morton Institute of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
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20
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Klymchenko AS. Solvatochromic and Fluorogenic Dyes as Environment-Sensitive Probes: Design and Biological Applications. Acc Chem Res 2017; 50:366-375. [PMID: 28067047 DOI: 10.1021/acs.accounts.6b00517] [Citation(s) in RCA: 637] [Impact Index Per Article: 91.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Fluorescent environment-sensitive probes are specially designed dyes that change their fluorescence intensity (fluorogenic dyes) or color (e.g., solvatochromic dyes) in response to change in their microenvironment polarity, viscosity, and molecular order. The studies of the past decade, including those of our group, have shown that these molecules become universal tools in fluorescence sensing and imaging. In fact, any biomolecular interaction or change in biomolecular organization results in modification of the local microenvironment, which can be directly monitored by these types of probes. In this Account, the main examples of environment-sensitive probes are summarized according to their design concepts. Solvatochromic dyes constitute a large class of environment-sensitive probes which change their color in response to polarity. Generally, they are push-pull dyes undergoing intramolecular charge transfer. Emission of their highly polarized excited state shifts to the red in more polar solvents. Excited-state intramolecular proton transfer is the second key concept to design efficient solvatochromic dyes, which respond to the microenvironment by changing relative intensity of the two emissive tautomeric forms. Due to their sensitivity to polarity and hydration, solvatochromic dyes have been successfully applied to biological membranes for studying lipid domains (rafts), apoptosis and endocytosis. As fluorescent labels, solvatochromic dyes can detect practically any type of biomolecular interactions, involving proteins, nucleic acids and biomembranes, because the binding event excludes local water molecules from the interaction site. On the other hand, fluorogenic probes usually exploit intramolecular rotation (conformation change) as a design concept, with molecular rotors being main representatives. These probes were particularly efficient for imaging viscosity and lipid order in biomembranes as well as to light up biomolecular targets, such as antibodies, aptamers and receptors. The emerging concepts to achieve fluorogenic response to the microenvironment include ground-state isomerization, aggregation-caused quenching, and aggregation-induced emission. The ground-state isomerization exploits, for instance, polarity-dependent spiro-lactone formation in silica-rhodamines. The aggregation-caused quenching uses disruption of the self-quenched dimers and nanoassemblies of dyes in less polar environments of lipid membranes and biomolecules. The aggregation-induced emission couples target recognition with formation of highly fluorescent dye aggregates. Overall, solvatochromic and fluorogenic probes enable background-free bioimaging in wash-free conditions as well as quantitative analysis when combined with advanced microscopy, such as fluorescence lifetime (FLIM) and ratiometric imaging. Further development of fluorescent environment-sensitive probes should address some remaining problems: (i) improving their optical properties, especially brightness, photostability, and far-red to near-infrared operating range; (ii) minimizing nonspecific interactions of the probes in biological systems; (iii) their adaptation for advanced microscopies, notably for superresolution and in vivo imaging.
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Affiliation(s)
- Andrey S. Klymchenko
- Laboratoire de Biophotonique et Pharmacologie,
UMR 7213 CNRS, Université de Strasbourg, F-67000 Strasbourg, France
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21
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Shroder DY, Lippert LG, Goldman YE. Single molecule optical measurements of orientation and rotations of biological macromolecules. Methods Appl Fluoresc 2016; 4:042004. [PMID: 28192292 PMCID: PMC5308470 DOI: 10.1088/2050-6120/4/4/042004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Subdomains of macromolecules often undergo large orientation changes during their catalytic cycles that are essential for their activity. Tracking these rearrangements in real time opens a powerful window into the link between protein structure and functional output. Site-specific labeling of individual molecules with polarized optical probes and measurement of their spatial orientation can give insight into the crucial conformational changes, dynamics, and fluctuations of macromolecules. Here we describe the range of single molecule optical technologies that can extract orientation information from these probes, review the relevant types of probes and labeling techniques, and highlight the advantages and disadvantages of these technologies for addressing specific inquiries.
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22
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Serdiuk IE, Roshal AD, Błażejowski J. Origin of Spectral Features and Acid–Base Properties of 3,7-Dihydroxyflavone and Its Monofunctional Derivatives in the Ground and Excited States. J Phys Chem A 2016; 120:4325-37. [DOI: 10.1021/acs.jpca.6b03290] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Illia E. Serdiuk
- Department of Chemistry, University of Gdańsk, 80-308 Gdańsk, Poland
- Institute of Chemistry, V. N. Karazin Kharkiv National University, 61022 Kharkiv, Ukraine
| | - Alexander D. Roshal
- Institute of Chemistry, V. N. Karazin Kharkiv National University, 61022 Kharkiv, Ukraine
| | - Jerzy Błażejowski
- Department of Chemistry, University of Gdańsk, 80-308 Gdańsk, Poland
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23
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Szakács Z, Bojtár M, Drahos L, Hessz D, Kállay M, Vidóczy T, Bitter I, Kubinyi M. The kinetics and mechanism of photooxygenation of 4'-diethylamino-3-hydroxyflavone. Photochem Photobiol Sci 2016; 15:219-27. [PMID: 26738442 DOI: 10.1039/c5pp00358j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The photolysis reactions of 4'-diethylamino-3-hydroxyflavone (D), a versatile fluorescent probe showing excited-state intramolecular proton transfer (ESIPT), and the magnesium chelate of D (MgD(2+)) have been studied in acetonitrile solution. Upon UV irradiation both species were oxidized into O-4-diethylaminobenzoyl salicylic acid, differently from the photoreaction of the parent compound 3-hydroxyflavone (3HF) which was described to undergo rearrangement to 3-hydroxy-3-phenyl-indan-1,2-dione. The photooxygenation of the Mg(2+) complex was found to be significantly faster than the reaction of the pure dye. As the kinetic analysis of the absorption spectra of samples under irradiation showed, the rate coefficients for the oxygenations of the excited state dye and complex have close values, kox(D*) = 2.4 × 10(7) min(-1), kox(MgD(2+)*) = 3.9 × 10(7) min(-1); the difference arises from the higher photooxygenation quantum yield of the complex, Φ(MgD(2+)) = 2.3 × 10(-3), than the respective value for the pure dye, Φ(D) = 1.5 × 10(-4). The potential energy surface of the photooxygenation of D was calculated assuming a reaction path in which the phototautomer formed from Dvia ESIPT, reacts in its triplet state with triplet molecular oxygen O2, a mechanism similar to that suggested for the photoreaction of the parent 3HF. The moderate values for the transition state energies confirmed the plausibility of the hypothetical mechanism.
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Affiliation(s)
- Zoltán Szakács
- Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, 1521 Budapest, Hungary.
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24
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Harkiss AH, Sutherland A. Recent advances in the synthesis and application of fluorescent α-amino acids. Org Biomol Chem 2016; 14:8911-8921. [DOI: 10.1039/c6ob01715k] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The design and synthesis of new fluorescent α-amino acids as well as their application in imaging of biological systems has been reviewed.
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Affiliation(s)
- Alexander H. Harkiss
- WestCHEM
- School of Chemistry
- The Joseph Black Building
- University of Glasgow
- Glasgow G12 8QQ
| | - Andrew Sutherland
- WestCHEM
- School of Chemistry
- The Joseph Black Building
- University of Glasgow
- Glasgow G12 8QQ
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25
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The membranes of Gram-negative bacteria: progress in molecular modelling and simulation. Biochem Soc Trans 2016; 43:162-7. [PMID: 25849911 DOI: 10.1042/bst20140262] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Molecular modelling and simulations have been employed to study the membranes of Gram-negative bacteria for over 20 years. Proteins native to these membranes, as well as antimicrobial peptides and drug molecules have been studied using molecular dynamics simulations in simple models of membranes, usually only comprising one lipid species. Thus, traditionally, the simulations have reflected the majority of in vitro membrane experimental setups, enabling observations from the latter to be rationalized at the molecular level. In the last few years, the sophistication and complexity of membrane models have improved considerably, such that the heterogeneity of the lipid and protein composition of the membranes can now be considered both at the atomistic and coarse-grain levels of granularity. Importantly this means relevant biology is now being retained in the models, thereby linking the in silico and in vivo scenarios. We discuss recent progress in simulations of proteins in simple lipid bilayers, more complex membrane models and finally describe some efforts to overcome timescale limitations of atomistic molecular dynamics simulations of bacterial membranes.
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26
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Jamasbi E, Ciccotosto GD, Tailhades J, Robins-Browne RM, Ugalde CL, Sharples RA, Patil N, Wade JD, Hossain MA, Separovic F. Site of fluorescent label modifies interaction of melittin with live cells and model membranes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2015; 1848:2031-9. [PMID: 26051124 DOI: 10.1016/j.bbamem.2015.06.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2015] [Revised: 05/30/2015] [Accepted: 06/02/2015] [Indexed: 02/01/2023]
Abstract
The mechanism of membrane disruption by melittin (MLT) of giant unilamellar vesicles (GUVs) and live cells was studied using fluorescence microscopy and two fluorescent synthetic analogues of MLT. The N-terminus of one of these was acylated with thiopropionic acid to enable labeling with maleimido-AlexaFluor 430 to study the interaction of MLT with live cells. It was compared with a second analogue labeled at P14C. The results indicated that the fluorescent peptides adhered to the membrane bilayer of phosphatidylcholine GUVs and inserted into the plasma membrane of HeLa cells. Fluorescence and light microscopy revealed changes in cell morphology after exposure to MLT peptides and showed bleb formation in the plasma membrane of HeLa cells. However, the membrane disruptive effect was dependent upon the location of the fluorescent label on the peptide and was greater when MLT was labeled at the N-terminus. Proline at position 14 appeared to be important for antimicrobial activity, hemolysis and cytotoxicity, but not essential for cell membrane disruption.
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Affiliation(s)
- Elaheh Jamasbi
- School of Chemistry, Bio21 Institute, The University of Melbourne, VIC 3010, Australia
| | | | - Julien Tailhades
- The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, VIC 3010, Australia
| | - Roy M Robins-Browne
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, The University of Melbourne, VIC 3010, Australia; Murdoch Childrens Research Institute, Royal Children's Hospital, Parkville, VIC 3052, Australia
| | - Cathryn L Ugalde
- Department of Biochemistry & Molecular Biology, Bio21 Institute, The University of Melbourne, VIC 3010, Australia
| | - Robyn A Sharples
- Department of Biochemistry & Molecular Biology, Bio21 Institute, The University of Melbourne, VIC 3010, Australia
| | - Nitin Patil
- School of Chemistry, Bio21 Institute, The University of Melbourne, VIC 3010, Australia; The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, VIC 3010, Australia
| | - John D Wade
- School of Chemistry, Bio21 Institute, The University of Melbourne, VIC 3010, Australia; The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, VIC 3010, Australia
| | - Mohammed Akhter Hossain
- School of Chemistry, Bio21 Institute, The University of Melbourne, VIC 3010, Australia; The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, VIC 3010, Australia
| | - Frances Separovic
- School of Chemistry, Bio21 Institute, The University of Melbourne, VIC 3010, Australia
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27
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Nguyen KT. Orientation determination of interfacial bent α-helical structures using Sum Frequency Generation vibrational spectroscopy. Chem Phys 2015. [DOI: 10.1016/j.chemphys.2014.11.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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28
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Song YK, Kang SK, Kim YI. Structural and Luminescent Properties of [ N-benzyl- N-(2-pyridyl)methylamine]dichlorozinc(II): Dual Fluorescence of N-benzyl- N-(2-pyridyl)methylamine. B KOREAN CHEM SOC 2015. [DOI: 10.1002/bkcs.10015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Young-Kwang Song
- Department of Chemistry Education and BK21 Plus Team for Advanced Chemical Materials; Pusan National University; Busan 609-735 Korea
| | - Sung Kwon Kang
- Department of Chemistry; Chungnam National University; Daejeon 305-764 Korea
| | - Young-Inn Kim
- Department of Chemistry Education and BK21 Plus Team for Advanced Chemical Materials; Pusan National University; Busan 609-735 Korea
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29
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Sholokh M, Zamotaiev OM, Das R, Postupalenko VY, Richert L, Dujardin D, Zaporozhets OA, Pivovarenko VG, Klymchenko AS, Mély Y. Fluorescent Amino Acid Undergoing Excited State Intramolecular Proton Transfer for Site-Specific Probing and Imaging of Peptide Interactions. J Phys Chem B 2014; 119:2585-95. [DOI: 10.1021/jp508748e] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Marianna Sholokh
- Laboratoire de
Biophotonique et Pharmacologie, UMR 7213 CNRS, Université de
Strasbourg, Faculté de Pharmacie, 74, Route du Rhin, 67401 Illkirch Cedex, France
- Department
of Chemistry, Kyiv National Taras Shevchenko University, 01033 Kyiv, Ukraine
| | | | - Ranjan Das
- Department
of Chemistry, West Bengal State University, Barasat, Kolkata 700126, West Bengal, India
| | - Viktoriia Y. Postupalenko
- Laboratoire de
Biophotonique et Pharmacologie, UMR 7213 CNRS, Université de
Strasbourg, Faculté de Pharmacie, 74, Route du Rhin, 67401 Illkirch Cedex, France
| | - Ludovic Richert
- Laboratoire de
Biophotonique et Pharmacologie, UMR 7213 CNRS, Université de
Strasbourg, Faculté de Pharmacie, 74, Route du Rhin, 67401 Illkirch Cedex, France
| | - Denis Dujardin
- Laboratoire de
Biophotonique et Pharmacologie, UMR 7213 CNRS, Université de
Strasbourg, Faculté de Pharmacie, 74, Route du Rhin, 67401 Illkirch Cedex, France
| | - Olga A. Zaporozhets
- Department
of Chemistry, Kyiv National Taras Shevchenko University, 01033 Kyiv, Ukraine
| | - Vasyl G. Pivovarenko
- Department
of Chemistry, Kyiv National Taras Shevchenko University, 01033 Kyiv, Ukraine
| | - Andrey S. Klymchenko
- Laboratoire de
Biophotonique et Pharmacologie, UMR 7213 CNRS, Université de
Strasbourg, Faculté de Pharmacie, 74, Route du Rhin, 67401 Illkirch Cedex, France
| | - Yves Mély
- Laboratoire de
Biophotonique et Pharmacologie, UMR 7213 CNRS, Université de
Strasbourg, Faculté de Pharmacie, 74, Route du Rhin, 67401 Illkirch Cedex, France
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30
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Design of donor–acceptor geometry for tuning excited-state polarization: fluorescence solvatochromism of push–pull biphenyls with various torsional restrictions on their aryl–aryl bonds. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.08.002] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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31
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Zamotaiev OM, Postupalenko VY, Shvadchak VV, Pivovarenko VG, Klymchenko AS, Mély Y. Monitoring penetratin interactions with lipid membranes and cell internalization using a new hydration-sensitive fluorescent probe. Org Biomol Chem 2014; 12:7036-44. [DOI: 10.1039/c4ob01242a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A new hydration-sensitive fluorescent label attached to the N-terminus of a cell-penetrating peptide allows visualization of the nanoscopic environment of its internalization pathway.
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Affiliation(s)
- Oleksandr M. Zamotaiev
- Laboratoire de Biophotonique et Pharmacologie
- UMR 7213 du CNRS
- Université de Strasbourg
- Faculté de Pharmacie
- 67401 Illkirch, France
| | - Viktoriia Y. Postupalenko
- Laboratoire de Biophotonique et Pharmacologie
- UMR 7213 du CNRS
- Université de Strasbourg
- Faculté de Pharmacie
- 67401 Illkirch, France
| | - Volodymyr V. Shvadchak
- Laboratoire de Biophotonique et Pharmacologie
- UMR 7213 du CNRS
- Université de Strasbourg
- Faculté de Pharmacie
- 67401 Illkirch, France
| | - Vasyl G. Pivovarenko
- Laboratoire de Biophotonique et Pharmacologie
- UMR 7213 du CNRS
- Université de Strasbourg
- Faculté de Pharmacie
- 67401 Illkirch, France
| | - Andrey S. Klymchenko
- Laboratoire de Biophotonique et Pharmacologie
- UMR 7213 du CNRS
- Université de Strasbourg
- Faculté de Pharmacie
- 67401 Illkirch, France
| | - Yves Mély
- Laboratoire de Biophotonique et Pharmacologie
- UMR 7213 du CNRS
- Université de Strasbourg
- Faculté de Pharmacie
- 67401 Illkirch, France
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