1
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Shimizu K, Sakaguchi M, Yamaguchi S, Otosu T. Peripheral adsorption of polylysine on one leaflet of a lipid bilayer reduces the lipid diffusion of both leaflets. Phys Chem Chem Phys 2024; 26:8873-8878. [PMID: 38426343 DOI: 10.1039/d3cp04882a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
Understanding polycation-lipid interaction is essential not only in molecular biology but also in the biomedical industry and pharmacology. However, the effect of the polycation-lipid interaction on the molecular properties of lipids in biomembranes remains elusive. Here, two fluorescence correlation spectroscopies (FCSs), pulse-interleaved excitation (PIE) FCS and lifetime-based FCS, were performed to elucidate the change in the lipid diffusion of a model biomembrane induced by polylysine (PLL) adsorption. The results of PIE-FCS showed that the diffusions of both anionic and zwitterionic lipids become slower in the presence of PLL but the mobility of the anionic lipids is much reduced, suggesting the preferential interaction between the PLL and the anionic lipids due to the electrostatic attraction. Furthermore, leaflet-specific lipid diffusion analysis by lifetime-based FCS clearly showed that PLL adsorption on one leaflet of the membrane reduces the lipid diffusion of both leaflets in the same manner. This clearly indicates that the interleaflet coupling is strong in the presence of PLL.
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Affiliation(s)
- Kosei Shimizu
- Department of Applied Chemistry, Graduate School of Science and Engineering, Saitama University, 255 Shimo-Okubo, Sakura, Saitama 338-8570, Japan.
| | - Miyuki Sakaguchi
- Department of Applied Chemistry, Graduate School of Science and Engineering, Saitama University, 255 Shimo-Okubo, Sakura, Saitama 338-8570, Japan.
| | - Shoichi Yamaguchi
- Department of Applied Chemistry, Graduate School of Science and Engineering, Saitama University, 255 Shimo-Okubo, Sakura, Saitama 338-8570, Japan.
| | - Takuhiro Otosu
- Department of Applied Chemistry, Graduate School of Science and Engineering, Saitama University, 255 Shimo-Okubo, Sakura, Saitama 338-8570, Japan.
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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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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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5
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Rodik RV, Cherenok SO, Postupalenko VY, Oncul S, Brusianska V, Borysko P, Kalchenko VI, Mely Y, Klymchenko AS. Anionic amphiphilic calixarenes for peptide assembly and delivery. J Colloid Interface Sci 2022; 624:270-278. [PMID: 35660896 DOI: 10.1016/j.jcis.2022.05.124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Revised: 05/14/2022] [Accepted: 05/19/2022] [Indexed: 10/18/2022]
Abstract
Shape-persistent macrocycles enable superior control on molecular self-assembly, allowing the preparation of well-defined nanostructures with new functions. Here, we report on anionic amphiphilic calixarenes of conic shape and their self-assembly behavior in aqueous media for application in intracellular delivery of peptides. Newly synthesized calixarenes bearing four phosphonate groups and two or four long alkyl chains were found to form micelles of ∼ 10 nm diameter, in contrast to an analogue with short alkyl chains. These amphiphilic calixarenes are able to complex model (oligo-lysine) and biologically relevant (HIV-1 nucleocapsid peptide) cationic peptides into small nanoparticles (20-40 nm). By contrast, a control anionic calixarene with short alkyl chains fails to form small nanoparticles with peptides, highlighting the importance of micellar assembly of amphiphilic calixarenes for peptide complexation. Cellular studies reveal that anionic amphiphilic calixarenes exhibit low cytotoxicity and enable internalization of fluorescently labelled peptides into live cells. These findings suggest anionic amphiphilic macrocycles as promising building blocks for the preparation of peptide delivery vehicles.
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Affiliation(s)
- Roman V Rodik
- Institute of Organic Chemistry, National Academy of Science of Ukraine, 02660 Kyiv, Ukraine.
| | - Sergiy O Cherenok
- Institute of Organic Chemistry, National Academy of Science of Ukraine, 02660 Kyiv, Ukraine
| | - Viktoriia Y Postupalenko
- Laboratoire de Bioimagerie et Pathologies, UMR 7021 CNRS, Université de Strasbourg, Faculté de Pharmacie, 74, Route du Rhin, 67401 ILLKIRCH Cedex, France
| | - Sule Oncul
- Laboratoire de Bioimagerie et Pathologies, UMR 7021 CNRS, Université de Strasbourg, Faculté de Pharmacie, 74, Route du Rhin, 67401 ILLKIRCH Cedex, France; İstanbul Medeniyet Üniversitesi, Istanbul, Turkey
| | | | - Petro Borysko
- Enamine Ltd, Chervonotkatska 78, 02094 Kyiv, Ukraine
| | - Vitaly I Kalchenko
- Institute of Organic Chemistry, National Academy of Science of Ukraine, 02660 Kyiv, Ukraine
| | - Yves Mely
- Laboratoire de Bioimagerie et Pathologies, UMR 7021 CNRS, Université de Strasbourg, Faculté de Pharmacie, 74, Route du Rhin, 67401 ILLKIRCH Cedex, France
| | - Andrey S Klymchenko
- Laboratoire de Bioimagerie et Pathologies, UMR 7021 CNRS, Université de Strasbourg, Faculté de Pharmacie, 74, Route du Rhin, 67401 ILLKIRCH Cedex, France.
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6
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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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7
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Lizio MG, Campana M, De Poli M, Jefferies DF, Cullen W, Andrushchenko V, Chmel NP, Bouř P, Khalid S, Clayden J, Blanch E, Rodger A, Webb SJ. Insight into the Mechanism of Action and Peptide-Membrane Interactions of Aib-Rich Peptides: Multitechnique Experimental and Theoretical Analysis. Chembiochem 2021; 22:1656-1667. [PMID: 33411956 PMCID: PMC8248331 DOI: 10.1002/cbic.202000834] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Revised: 01/06/2021] [Indexed: 12/16/2022]
Abstract
The increase in resistant bacterial strains necessitates the identification of new antimicrobial molecules. Antimicrobial peptides (AMPs) are an attractive option because of evidence that bacteria cannot easily develop resistance to AMPs. The peptaibols, a class of naturally occurring AMPs, have shown particular promise as antimicrobial drugs, but their development has been hindered by their mechanism of action not being clearly understood. To explore how peptaibols might interact with membranes, circular dichroism, vibrational circular dichroism, linear dichroism, Raman spectroscopy, Raman optical activity, neutron reflectivity and molecular dynamics simulations have been used to study a small library of peptaibol mimics, the Aib-rich peptides. All the peptides studied quickly partitioned and oriented in membranes, and we found evidence of chiral interactions between the phospholipids and membrane-embedded peptides. The protocols presented in this paper open new ground by showing how chiro-optical spectroscopies can throw light on the mechanism of action of AMPs.
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Affiliation(s)
| | - Mario Campana
- ISIS Neutron and Muon SourceRutherford Appleton Laboratory Harwell DidcotOxfordOX11 0QXUK
| | - Matteo De Poli
- Department of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
| | | | - William Cullen
- Department of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
- Manchester Institute of BiotechnologyUniversity of Manchester131 Princess St.ManchesterM1 7DNUK
| | - Valery Andrushchenko
- Institute of Organic Chemistry and BiochemistryAcademy of SciencesFlemingovo náměstí 216610Prague 6Czech Republic
| | - Nikola P. Chmel
- Department of ChemistryUniversity of WarwickCoventryCV4 7ALUK
| | - Petr Bouř
- Institute of Organic Chemistry and BiochemistryAcademy of SciencesFlemingovo náměstí 216610Prague 6Czech Republic
| | - Syma Khalid
- School of ChemistryUniversity of Southampton HighfieldSouthamptonSO17 1BJUK
| | - Jonathan Clayden
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
| | - Ewan Blanch
- School of ScienceRMIT UniversityGPO Box 2476MelbourneVictoria3001Australia
| | - Alison Rodger
- Department of ChemistryUniversity of WarwickCoventryCV4 7ALUK
- Department of Molecular SciencesMacquarie UniversitySydneyNSW 2109Australia
| | - Simon J. Webb
- Department of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
- Manchester Institute of BiotechnologyUniversity of Manchester131 Princess St.ManchesterM1 7DNUK
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Chen WL, Ma ST, Chen YW, Chao YC, Chan AC, Tu LH, Liu WM. A Fluorogenic Molecule for Probing Islet Amyloid Using Flavonoid as a Scaffold Design. Biochemistry 2020; 59:1482-1492. [DOI: 10.1021/acs.biochem.0c00076] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wei-Ling Chen
- Department of Chemistry, National Taiwan Normal University, Taipei 116, Taiwan
| | - Shih-Ting Ma
- Department of Chemistry, Fu Jen Catholic University, New Taipei City 24205, Taiwan
| | - Yun-Wen Chen
- Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan
| | - Yen-Cheng Chao
- Department of Chemistry, Fu Jen Catholic University, New Taipei City 24205, Taiwan
| | - Ai-Ci Chan
- Department of Chemistry, National Taiwan Normal University, Taipei 116, Taiwan
| | - Ling-Hsien Tu
- Department of Chemistry, National Taiwan Normal University, Taipei 116, Taiwan
| | - Wei-Min Liu
- Department of Chemistry, Fu Jen Catholic University, New Taipei City 24205, Taiwan
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9
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A Selective, Dual Emission β-Alanine Aminopeptidase Activated Fluorescent Probe for the Detection of Pseudomonas aeruginosa, Burkholderia cepacia, and Serratia marcescens. Molecules 2019; 24:molecules24193550. [PMID: 31575027 PMCID: PMC6804094 DOI: 10.3390/molecules24193550] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 09/26/2019] [Accepted: 09/26/2019] [Indexed: 11/17/2022] Open
Abstract
Selective detection of β-alanyl aminopeptidase (BAP)-producing Pseudomonas aeruginosa, Serratia marcescens, and Burkholderia cepacia was achieved by employing the blue-to-yellow fluorescent transition of a BAP-specific enzyme substrate, 3-hydroxy-2-(p-dimethylaminophenyl)flavone derivative, incorporating a self-immolative linker to β-alanine. Upon cellular uptake and accumulation of the substrate by viable bacterial colonies, blue fluorescence was generated, while hydrolysis of the N-terminal peptide bond by BAP resulted in the elimination of the self-immolative linker and the restoration of the original fluorescence of the flavone derivative.
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10
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Kucherak OA, Shvadchak VV, Kyriukha YA, Yushchenko DA. Synthesis of a Fluorescent Probe for Sensing Multiple Protein States. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800524] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Oleksandr A. Kucherak
- Laboratory of Chemical Biology; Institute of Organic Chemistry and Biochemistry; Academy of Sciences of the Czech Republic; Flemingovo nam. 2 16610 Prague 6 Czech Republic
| | - Volodymyr V. Shvadchak
- Laboratory of Chemical Biology; Institute of Organic Chemistry and Biochemistry; Academy of Sciences of the Czech Republic; Flemingovo nam. 2 16610 Prague 6 Czech Republic
| | - Yevhenii A. Kyriukha
- Laboratory of Chemical Biology; Institute of Organic Chemistry and Biochemistry; Academy of Sciences of the Czech Republic; Flemingovo nam. 2 16610 Prague 6 Czech Republic
| | - Dmytro A. Yushchenko
- Laboratory of Chemical Biology; Institute of Organic Chemistry and Biochemistry; Academy of Sciences of the Czech Republic; Flemingovo nam. 2 16610 Prague 6 Czech Republic
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11
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Ab initio study of polar and non-polar aprotic solvents effects on some 3-hydroxychromones and 3-hydroxyquinolones derivatives. J Mol Model 2018. [PMID: 29541924 DOI: 10.1007/s00894-018-3628-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The photophysical properties of some 3-hydroxychromones (3-HC) and 3-hydroxyquinolones (3-HQ) derivatives are investigated in polar and non-polar aprotic solvents using the TDDFT method and the PCM formalism. In acetonitrile and n-hexane, 2-(2-benzothienyl)-3-HC) (BTHC), 2-furyl-3-HQ (FHQ), and 1-methyl-2-furyl-3-HQ (MFHQ) have exhibited dual emission bands due to the excited state intramolecular proton transfer (ESIPT) reaction, leading to a single excited tautomer form. Our results indicate a very high BTHC light absorption efficiency and radiative rate constant. A charge transfer (CT) analysis suggests that the chromone moiety acts as an acceptor group while quinolone moiety acts as an electron donor. In addition, in non-polar n-hexane the furyl group may act as an acceptor, while in polar acetonitrile it may act as an electron donor. The energies of the upper and lower states of the normal form fluorescence have been decreased by the introduction of ortho-methyl group in FHQ. In all states, MFHQ exhibits large distortions of the dihedral angle between the chromone moiety and the furan group in para position. The ESIPT reaction is irreversible for the three derivatives in all cases studied in this work. Since experimental data with n-hexane are not available, results concerning this solvent are only predictions.
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12
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Zhao Y, Wang M, Zhou P, Yang C, Ma X, Tang Z, Bao D. The effect of benzo-annelation on intermolecular hydrogen bond and proton transfer of 2-methyl-3-hydroxy-4(1H)-quinolone in methanol: A TD-DFT study. J PHYS ORG CHEM 2018. [DOI: 10.1002/poc.3803] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yanliang Zhao
- School of Physics and Optoelectronics Engineering; Ludong University; Yantai China
| | - Meishan Wang
- School of Physics and Optoelectronics Engineering; Ludong University; Yantai China
| | - Panwang Zhou
- State Key Lab of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics; Chinese Academy of Sciences; Dalian China
| | - Chuanlu Yang
- School of Physics and Optoelectronics Engineering; Ludong University; Yantai China
| | - Xiaoguang Ma
- School of Physics and Optoelectronics Engineering; Ludong University; Yantai China
| | - Zhe Tang
- State Key Lab of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics; Chinese Academy of Sciences; Dalian China
| | - Dongshuai Bao
- School of Physics and Optoelectronics Engineering; Ludong University; Yantai China
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13
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Kaisersberger Vincek M, Mor A, Gorgieva S, Kokol V. Antibacterial activity and cytotoxycity of gelatine-conjugated lysine-based peptides. J Biomed Mater Res A 2017; 105:3110-3126. [PMID: 28771959 DOI: 10.1002/jbm.a.36164] [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] [Received: 05/10/2017] [Revised: 06/30/2017] [Accepted: 07/28/2017] [Indexed: 12/21/2022]
Abstract
The effect of the coupling approach (chemical by using carbodiimide chemistry, and enzymatic by using transglutaminase) of a hydrophilic ɛ-poly-L-lysine (ɛPL) and a structurally-hydrophobic oligo-acyl-lysyl (OAK) to a gelatine (GEL) macromolecule, and their antibacterial activity against Gram-negative E. coli and Gram-positive S. aureus bacteria, as well as cytotoxicity to human osteoblast cells was studied as potential macromolecules for biomedical applications. Different spectroscopic (ultraviolet-visible, infrared, fluorescence, and electron paramagnetic resonance) and separation (size-exclusion chromatography and capillary zone electrophoresis) techniques, as well as zeta-potential analysis were performed to confirm the ɛPL/OAK covalent coupling and to determine their amount and orientation of the immobilization. The highest and kinetically the fastest reduction of bacteria (≥77% against E. coli vs. ≥82% against S. aureus) was achieved with GEL functionalized with ɛPL/OAK by the chemical grafting-to approach being correlated with conformationally the highly-flexible ˝brush-like˝ orientation linkage of peptides, enable its targeted and rapid interactions with bacteria membrane. The up to 400-fold lower yield of OAKs being immobilized may be related also to its cationic charge and hydrophobic alkyl chain moieties, compared to more hydrophilic ɛPL easily causing random polymerization and self-conjugation. The ɛPL/OAK-functionalized GEL did not induce citotoxicity to osteoblasts, even at ∼25-fold higher concentration than bacterial minimum inhibitory (MIC) concentration of ɛPL/OAK. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 105A: 3110-3126, 2017.
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Affiliation(s)
- Maja Kaisersberger Vincek
- Faculty of Mechanical Engineering, Institute of Engineering Materials and Design, University of Maribor, Maribor, Slovenia
| | - Amram Mor
- Department of Biotechnology & Food Engineering, Technion-Israel Institute of Technology, Haifa, Israel
| | - Selestina Gorgieva
- Faculty of Mechanical Engineering, Institute of Engineering Materials and Design, University of Maribor, Maribor, Slovenia
| | - Vanja Kokol
- Faculty of Mechanical Engineering, Institute of Engineering Materials and Design, University of Maribor, Maribor, Slovenia
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14
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Azcárate JC, Díaz SA, Fauerbach JA, Gillanders F, Rubert AA, Jares-Erijman EA, Jovin TM, Fonticelli MH. ESIPT and FRET probes for monitoring nanoparticle polymer coating stability. NANOSCALE 2017; 9:8647-8656. [PMID: 28612865 DOI: 10.1039/c7nr01787a] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Coating strategies of inorganic nanoparticles (NPs) can provide properties unavailable to the NP core alone, such as targeting, specific sensing, and increased biocompatibility. Non-covalent amphiphilic NP capping polymers function via hydrophobic interactions with surface ligands and are extensively used to transfer NPs to aqueous media. For applications of coated NPs as actuators (sensors, markers, or for drug delivery) in a complex environment, such as biological systems, it is important to achieve a deep understanding of the factors affecting coating stability and behavior. We have designed a system that tests the coating stability of amphiphilic polymers through a simple fluorescent readout using either polarity sensing ESIPT (excited state intramolecular proton transfer) dyes or NP FRET (Förster resonance energy transfer). The stability of the coating was determined in response to changes in polarity, pH and ionic strength in the medium. Using the ESIPT system we observed linear changes in signal up to ∼20-25% v/v of co-solvent addition, constituting a break point. Based on such data, we propose a model for coating instability and the important adjustable parameters, such as the electrical charge distribution. FRET data provided confirmatory evidence for the model. The ESIPT dyes and FRET based methods represent new, simple tools for testing NP coating stability in complex environments.
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Affiliation(s)
- Julio C Azcárate
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Facultad de Ciencias Exactas, Universidad Nacional de La Plata - CONICET Sucursal 4, Casilla de Correo 16, 1900 La Plata, Argentina.
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15
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Zamotaiev OM, Shvadchak V, Sych TP, Melnychuk NA, Yushchenko D, Mely Y, Pivovarenko VG. Environment-sensitive quinolone demonstrating long-lived fluorescence and unusually slow excited-state intramolecular proton transfer kinetics. Methods Appl Fluoresc 2016; 4:034004. [PMID: 28355165 DOI: 10.1088/2050-6120/4/3/034004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A new small fluorescent dye based on 3-hydroxybenzo[g]quinolone, a benzo-analogue of Pseudomonas quinolone signal species, has been synthesized. The dye demonstrates interesting optical properties, with absorption in the visible region, two band emission due to an excited-state intramolecular proton transfer (ESIPT) reaction and high fluorescence quantum yield in both protic and aprotic media. Time-resolved fluorescence spectroscopy shows that the ESIPT reaction time is unusually long (up to 8 ns), indicating that both forward and backward ESIPT reactions are very slow in comparison to other 3-hydroxyquinolones. In spite of these slow rate constants, the ESIPT reaction was found to show a reversible character as a result of the very long lifetimes of both N* and T* forms (up to 16 ns). The ESIPT reaction rate is mainly controlled by the hydrogen bond donor ability in protic solvents and the polarity in aprotic solvents. Using large unilamellar vesicles and giant unilamellar vesicles of different lipid compositions, the probe was shown to preferentially label liquid disordered phases.
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Affiliation(s)
- O M Zamotaiev
- Department of Chemistry, National Taras Shevchenko University of Kyiv, 01601 Kyiv, Ukraine
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16
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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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17
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Barthes NPF, Karpenko IA, Dziuba D, Spadafora M, Auffret J, Demchenko AP, Mély Y, Benhida R, Michel BY, Burger A. Development of environmentally sensitive fluorescent and dual emissive deoxyuridine analogues. RSC Adv 2015. [DOI: 10.1039/c5ra02709h] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
We designed and developed fluorescent deoxyuridine analogues with strong sensitivity to hydration for the major groove labelling of DNA.
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Affiliation(s)
- N. P. F. Barthes
- Institut de Chimie de Nice
- UMR 7272
- Université de Nice Sophia Antipolis
- CNRS
- 06108 Nice Cedex 2
| | - I. A. Karpenko
- Institut de Chimie de Nice
- UMR 7272
- Université de Nice Sophia Antipolis
- CNRS
- 06108 Nice Cedex 2
| | - D. Dziuba
- Institut de Chimie de Nice
- UMR 7272
- Université de Nice Sophia Antipolis
- CNRS
- 06108 Nice Cedex 2
| | - M. Spadafora
- Institut de Chimie de Nice
- UMR 7272
- Université de Nice Sophia Antipolis
- CNRS
- 06108 Nice Cedex 2
| | - J. Auffret
- Institut de Chimie de Nice
- UMR 7272
- Université de Nice Sophia Antipolis
- CNRS
- 06108 Nice Cedex 2
| | | | - Y. Mély
- Laboratoire de Biophotonique et Pharmacologie
- UMR 7213
- Faculté de Pharmacie
- Université de Strasbourg
- CNRS
| | - R. Benhida
- Institut de Chimie de Nice
- UMR 7272
- Université de Nice Sophia Antipolis
- CNRS
- 06108 Nice Cedex 2
| | - B. Y. Michel
- Institut de Chimie de Nice
- UMR 7272
- Université de Nice Sophia Antipolis
- CNRS
- 06108 Nice Cedex 2
| | - A. Burger
- Institut de Chimie de Nice
- UMR 7272
- Université de Nice Sophia Antipolis
- CNRS
- 06108 Nice Cedex 2
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18
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Karpenko IA, Collot M, Richert L, Valencia C, Villa P, Mély Y, Hibert M, Bonnet D, Klymchenko AS. Fluorogenic Squaraine Dimers with Polarity-Sensitive Folding As Bright Far-Red Probes for Background-Free Bioimaging. J Am Chem Soc 2014; 137:405-12. [DOI: 10.1021/ja5111267] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Iuliia A. Karpenko
- Laboratoire
d’Innovation Thérapeutique, UMR 7200 CNRS/Université de Strasbourg, Labex MEDALIS, Faculté de Pharmacie, 74
route du Rhin, 67401 Illkirch, France
| | - Mayeul Collot
- Laboratoire
de Biophotonique et Pharmacologie, UMR 7213 CNRS/Université de Strasbourg,
Faculté de Pharmacie, 74 route du Rhin, 67401 Illkirch, France
| | - Ludovic Richert
- Laboratoire
de Biophotonique et Pharmacologie, UMR 7213 CNRS/Université de Strasbourg,
Faculté de Pharmacie, 74 route du Rhin, 67401 Illkirch, France
| | - Christel Valencia
- Platform
of Integrative Chemical Biology of Strasbourg (PCBIS), FMTS, UMS 3286 CNRS/Université de Strasbourg, ESBS Pôle API, Bld Sébastien Brant, 67401 Illkirch, France
| | - Pascal Villa
- Platform
of Integrative Chemical Biology of Strasbourg (PCBIS), FMTS, UMS 3286 CNRS/Université de Strasbourg, ESBS Pôle API, Bld Sébastien Brant, 67401 Illkirch, France
| | - Yves Mély
- Laboratoire
de Biophotonique et Pharmacologie, UMR 7213 CNRS/Université de Strasbourg,
Faculté de Pharmacie, 74 route du Rhin, 67401 Illkirch, France
| | - Marcel Hibert
- Laboratoire
d’Innovation Thérapeutique, UMR 7200 CNRS/Université de Strasbourg, Labex MEDALIS, Faculté de Pharmacie, 74
route du Rhin, 67401 Illkirch, France
| | - Dominique Bonnet
- Laboratoire
d’Innovation Thérapeutique, UMR 7200 CNRS/Université de Strasbourg, Labex MEDALIS, Faculté de Pharmacie, 74
route du Rhin, 67401 Illkirch, France
| | - Andrey S. Klymchenko
- Laboratoire
de Biophotonique et Pharmacologie, UMR 7213 CNRS/Université de Strasbourg,
Faculté de Pharmacie, 74 route du Rhin, 67401 Illkirch, France
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19
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Afri M, Alexenberg C, Aped P, Bodner E, Cohen S, Ejgenburg M, Eliyahu S, Gilinsky-Sharon P, Harel Y, Naqqash ME, Porat H, Ranz A, Frimer AA. NMR-based molecular ruler for determining the depth of intercalants within the lipid bilayer. Chem Phys Lipids 2014; 184:105-18. [DOI: 10.1016/j.chemphyslip.2014.07.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2014] [Revised: 07/10/2014] [Accepted: 07/21/2014] [Indexed: 01/20/2023]
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20
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The HIV-1 nucleocapsid protein recruits negatively charged lipids to ensure its optimal binding to lipid membranes. J Virol 2014; 89:1756-67. [PMID: 25410868 DOI: 10.1128/jvi.02931-14] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
UNLABELLED The HIV-1 Gag polyprotein precursor composed of the matrix (MA), capsid (CA), nucleocapsid (NC), and p6 domains orchestrates virus assembly via interactions between MA and the cell plasma membrane (PM) on one hand and NC and the genomic RNA on the other hand. As the Gag precursor can adopt a bent conformation, a potential interaction of the NC domain with the PM cannot be excluded during Gag assembly at the PM. To investigate the possible interaction of NC with lipid membranes in the absence of any interference from the other domains of Gag, we quantitatively characterized by fluorescence spectroscopy the binding of the mature NC protein to large unilamellar vesicles (LUVs) used as membrane models. We found that NC, either in its free form or bound to an oligonucleotide, was binding with high affinity (∼ 10(7) M(-1)) to negatively charged LUVs. The number of NC binding sites, but not the binding constant, was observed to decrease with the percentage of negatively charged lipids in the LUV composition, suggesting that NC and NC/oligonucleotide complexes were able to recruit negatively charged lipids to ensure optimal binding. However, in contrast to MA, NC did not exhibit a preference for phosphatidylinositol-(4,5)-bisphosphate. These results lead us to propose a modified Gag assembly model where the NC domain contributes to the initial binding of the bent form of Gag to the PM. IMPORTANCE The NC protein is a highly conserved nucleic acid binding protein that plays numerous key roles in HIV-1 replication. While accumulating evidence shows that NC either as a mature protein or as a domain of the Gag precursor also interacts with host proteins, only a few data are available on the possible interaction of NC with lipid membranes. Interestingly, during HIV-1 assembly, the Gag precursor is thought to adopt a bent conformation where the NC domain may interact with the plasma membrane. In this context, we quantitatively characterized the binding of NC, as a free protein or as a complex with nucleic acids, to lipid membranes and showed that the latter constitute a binding platform for NC. Taken together, our data suggest that the NC domain may play a role in the initial binding events of Gag to the plasma membrane during HIV-1 assembly.
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21
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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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22
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Abstract
Epsilon-poly-l-lysine (ε-PL) is a natural antimicrobial cationic peptide which is generally regarded as safe (GRAS) as a food preservative. Although its antimicrobial activity is well documented, its mechanism of action is only vaguely described. The aim of this study was to clarify ε-PL's mechanism of action using Escherichia coli and Listeria innocua as model organisms. We examined ε-PL's effect on cell morphology and membrane integrity and used an array of E. coli deletion mutants to study how specific outer membrane components affected the action of ε-PL. We furthermore studied its interaction with lipid bilayers using membrane models. In vitro cell studies indicated that divalent cations and the heptose I and II phosphate groups in the lipopolysaccharide layer of E. coli are critical for ε-PL's binding efficiency. ε-PL removed the lipopolysaccharide layer and affected cell morphology of E. coli, while L. innocua underwent minor morphological changes. Propidium iodide staining showed that ε-PL permeabilized the cytoplasmic membrane in both species, indicating the membrane as the site of attack. We compared the interaction with neutral or negatively charged membrane systems and showed that the interaction with ε-PL relied on negative charges on the membrane. Suspended membrane vesicles were disrupted by ε-PL, and a detergent-like disruption of E. coli membrane was confirmed by atomic force microscopy imaging of supported lipid bilayers. We hypothesize that ε-PL destabilizes membranes in a carpet-like mechanism by interacting with negatively charged phospholipid head groups, which displace divalent cations and enforce a negative curvature folding on membranes that leads to formation of vesicles/micelles.
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23
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Dziuba D, Karpenko IA, Barthes NPF, Michel BY, Klymchenko AS, Benhida R, Demchenko AP, Mély Y, Burger A. Rational Design of a Solvatochromic Fluorescent Uracil Analogue with a Dual-Band Ratiometric Response Based on 3-Hydroxychromone. Chemistry 2014; 20:1998-2009. [DOI: 10.1002/chem.201303399] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Indexed: 12/24/2022]
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24
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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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25
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Postupalenko VY, Zamotaiev OM, Shvadchak VV, Strizhak AV, Pivovarenko VG, Klymchenko AS, Mely Y. Dual-fluorescence L-amino acid reports insertion and orientation of melittin peptide in cell membranes. Bioconjug Chem 2013; 24:1998-2007. [PMID: 24266665 DOI: 10.1021/bc400325n] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Monitoring insertion and orientation of peptides in situ on cell membranes remains a challenge. To this end, we synthesized an l-amino acid (AFaa) containing a dual-fluorescence dye of the 3-hydroxyflavone family, as a side chain. In contrast to other labeling approaches using a flexible linker, the AFaa fluorophore, introduced by solid phase synthesis into desired position of a peptide, is attached closely to its backbone with well-defined orientation, and, therefore, could reflect its localization in the membrane. This concept was validated by replacing the leucine-9 (L9) and tryptophan-19 (W19) residues by AFaa in melittin, a well-studied membrane-active peptide. Due to high sensitivity of AFaa dual emission to the environment polarity, we detected a much deeper insertion of L9 peptide position into the bilayer, compared to the W19 position. Moreover, using fluorescence microscopy with a polarized light excitation, we found different orientation of AFaa at L9 and W19 positions of melittin in the bilayers of giant vesicles and cellular membranes. These results suggested that in the natural membranes, similarly to the model lipid bilayers, melittin is preferentially oriented parallel to the membrane surface. The developed amino acid and the proposed methodology will be of interest to study other membrane peptides.
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Affiliation(s)
- 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
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26
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Moroz VV, Chalyi AG, Serdiuk IE, Roshal AD, Zadykowicz B, Pivovarenko VG, Wróblewska A, Błażejowski J. Tautomerism and Behavior of 3-Hydroxy-2-phenyl-4H-chromen-4-ones (Flavonols) and 3,7-Dihydroxy-2,8-diphenyl-4H,6H-pyrano[3,2-g]chromene-4,6-diones (Diflavonols) in Basic Media: Spectroscopic and Computational Investigations. J Phys Chem A 2013; 117:9156-67. [DOI: 10.1021/jp403487w] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Valery V Moroz
- Institute of Chemistry, Kharkiv V.N. Karazin National University , Svoboda 4, 61077 Kharkiv, Ukraine
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27
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Klymchenko AS, Mely Y. Fluorescent environment-sensitive dyes as reporters of biomolecular interactions. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2013; 113:35-58. [PMID: 23244788 DOI: 10.1016/b978-0-12-386932-6.00002-8] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Monitoring biomolecular interactions is a fundamental issue in biosensing, with numerous applications ranging from biological research to clinical diagnostics. Fluorescent dyes capable of changing their color and brightness in response to changes of their environment properties, the so-called environment-sensitive dyes, have recently emerged as reporters of these interactions. The most well established of these are dyes that undergo excited-state charge transfer showing red shift of their single emission band with increase in the solvent polarity. The other promising class are dyes of the 3-hydroxychromone family that undergo excited-state intramolecular proton transfer and show solvent-sensitive dual emission. Examples of existing solvatochromic dyes and their biosensing applications are given, with particular focus on the 3-hydroxychromones. It is shown that solvatochromic dyes are powerful tools for monitoring conformation changes of proteins and their interactions with nucleic acids, proteins, and lipid membranes.
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Affiliation(s)
- Andrey S Klymchenko
- Laboratoire de Biophotonique et Pharmacologie, UMR 7213 CNRS, Université de Strasbourg, Faculté de Pharmacie, Illkirch Cedex, France
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28
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Keith DJ, Wolfrum K, Eshleman AJ, Janowsky A. Melittin initiates dopamine transporter internalization and recycling in transfected HEK-293 cells. Eur J Pharmacol 2012; 690:13-21. [PMID: 22683840 DOI: 10.1016/j.ejphar.2012.05.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Revised: 05/02/2012] [Accepted: 05/15/2012] [Indexed: 12/26/2022]
Abstract
The dopamine transporter removes the neurotransmitter from the synapse, regulating dopamine availability. The transporter can be internalized and its function is blocked by cocaine and other ligands. Melittin inhibits dopamine transporter function and causes internalization of the recombinant transporter in stably transfected HEK-293 cells, but the specific pathways for internalization and disposition of the transporter are unknown. Here we report that melittin treatment increased both transporter internalization and colocalization with clathrin, effects that were blocked by pretreatment with cocaine. Density gradient centrifugation revealed that melittin treatment caused the dopamine transporter to associate with a density fraction containing the early endosome marker Rab 5A. Confocal microscopy revealed that melittin treatment also increased transporter colocalization with Rab 5A and decreased colocalization with the late endosome marker Rab 7 and the recycling endosome marker Rab 11. Following 60 min of melittin treatment, the transporter was trafficked back to the membrane. By comparison, phorbol ester treatment increased transporter colocalization with early endosome antigen 1 and Rab 7 in a time-dependent manner. Cocaine treatment alone does not affect transporter trafficking in these cells. Results indicate multiple dopamine transporter internalization and recycling pathways that depend on transporter-ligand interactions and post-translational modifications.
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Affiliation(s)
- Dove J Keith
- Graduate Program in Neuroscience, VA Medical Center, Portland, OR 97239, USA
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29
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Kenfack CA, Klymchenko AS, Duportail G, Burger A, Mély Y. Ab initio study of the solvent H-bonding effect on ESIPT reaction and electronic transitions of 3-hydroxychromone derivatives. Phys Chem Chem Phys 2012; 14:8910-8. [PMID: 22641242 DOI: 10.1039/c2cp40869d] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The electronic transitions occurring in 4-(N,N-dimethylamino)-3-hydroxyflavone (DMAF) and 2-furanyl-3-hydroxychromone (FHC) were investigated using the TDDFT method in aprotic and protic solvents. The solvent effect was incorporated into the calculations via the PCM formalism. The H-bonding between solute and protic solvent was taken into account by considering a molecular complex between these molecules. To examine the effect of the H-bond on the ESIPT reaction, the absorption and emission wavelengths as well as the energies of the different states that intervene during these electronic transitions were calculated in acetonitrile, ethanol and methanol. The calculated positions of the absorption and emission wavelengths in various solvents were in excellent agreement with the experimental spectra, validating our approach. We found that in DMAF, the hydrogen bonding with protic solvents makes the ESIPT reaction energetically unfavourable, which explains the absence of the ESIPT tautomer emission in protic solvents. In contrast, the excited tautomer state of FHC remains energetically favourable in both aprotic and protic solvents. Comparing our calculations with the previously reported time-resolved fluorescence data, the ESIPT reaction of DMAF in aprotic solvents is reversible because the emitting states are energetically close, whereas in FHC, ESIPT is irreversible because the tautomer state is below the corresponding normal state. Therefore, the ESIPT reaction in DMAF is controlled by the relative energies of the excited states (thermodynamic control), while in FHC the ESIPT is controlled probably by the energetic barrier (kinetic control).
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Affiliation(s)
- Cyril A Kenfack
- Laboratoire de Biophotonique et Pharmacologie, UMR 7213 du CNRS, Faculté de Pharmacie, Université de Strasbourg, 74, Route du Rhin, 67401 Illkirch Cedex, France.
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Pivovarenko VG, Zamotaiev OM, Shvadchak VV, Postupalenko VY, Klymchenko AS, Mély Y. Quantification of local hydration at the surface of biomolecules using dual-fluorescence labels. J Phys Chem A 2012; 116:3103-9. [PMID: 22394312 DOI: 10.1021/jp2101732] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
By using four labels of the 3-hydroxyflavone family displaying selective sensitivity to hydrogen bond (HB) donors and poor response to other polar molecules, we developed an approach for measuring local water concentration [H(2)O](L) (or partial volume of water: W(A) = [H(2)O](L)/55.6) in the label surrounding both in solvent mixtures and in biomolecules by the intensity ratio of two emissive forms of the label, N*/T*. Using a series of binary water/solvent mixtures with limited preferential solvation effects, a linear dependence of log(N*/T*) on the local concentration of HB donor was obtained and then used as a calibration curve for estimating the W(A) values in the surroundings of the probes conjugated to biomolecules. By this approach, we estimated the hydration of the labels in different peptides and their complexes with DNAs. We found that W(A) values for the label at the peptide N-terminus are lower (0.63-0.91) than for free labels and depend strongly on the nature of the N-terminal amino acid. When complexed with different DNAs, the estimated hydration of the labels conjugated to the labeled peptides was much lower (W(A) = 0-0.47) and depended on the DNA nature and linker-label structure. Thus, the elaborated method allows a site-specific evaluation of hydration at the surface of a biomolecule through the determination of the partial volume of water. We believe the developed procedure can be successfully applied for monitoring hydration at the surface of any biomolecule or nanostructure.
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Affiliation(s)
- Vasyl G Pivovarenko
- Organic Chemistry Chair, Chemistry Faculty, Taras Shevchenko National University of Kyiv, 01601 Kyiv, Ukraine
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Dang YQ, Li HW, Wu Y. Construction of a supramolecular Förster resonance energy transfer system and its application based on the interaction between Cy3-labeled melittin and phosphocholine encapsulated quantum dots. ACS APPLIED MATERIALS & INTERFACES 2012; 4:1267-1272. [PMID: 22356839 DOI: 10.1021/am3000984] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Due to possessing unique optical properties, semiconductor quantum dots (QDs) have been applied to construct bioconjugates. Using QDs as donors, the Förster resonance energy transfer (FRET) system can be developed and applied to biological imaging and sensing, and various construction strategies have been reported. To provide a new practicable method, we introduce a protocol with two routes to construct a supramolecular FRET system based on the high-affinity interaction between melittin and phosphocholine. Melittin exists with a random coil structure in aqueous environments but will adopt a bent helix when inserted into natural or artificial membranes. Such specific and high affinity protein-membrane interaction makes it possible to construct a QDs-based FRET system. The strategy applying protein-membrane interaction to construct a QDs-based FRET system can be applied to the investigation on the protein-membrane interaction through distance-depended FRET and further proteolysis of trypsin. Because of the existence of various protein-membrane interactions in real life, the system has the potential to be expanded to other related systems.
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Affiliation(s)
- Yong-Qiang Dang
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University, No. 2699, Qianjin Street, Changchun, 130012, China
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Amin F, Yushchenko DA, Montenegro JM, Parak WJ. Integration of Organic Fluorophores in the Surface of Polymer-Coated Colloidal Nanoparticles for Sensing the Local Polarity of the Environment. Chemphyschem 2012; 13:1030-5. [DOI: 10.1002/cphc.201100901] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2011] [Revised: 02/01/2012] [Indexed: 11/06/2022]
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Kucherak OA, Richert L, Mély Y, Klymchenko AS. Dipolar 3-methoxychromones as bright and highly solvatochromic fluorescent dyes. Phys Chem Chem Phys 2012; 14:2292-300. [DOI: 10.1039/c2cp23037b] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Shvadchak VV, Yushchenko DA, Pievo R, Jovin TM. The mode of α-synuclein binding to membranes depends on lipid composition and lipid to protein ratio. FEBS Lett 2011; 585:3513-9. [PMID: 22004764 DOI: 10.1016/j.febslet.2011.10.006] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2011] [Revised: 10/01/2011] [Accepted: 10/03/2011] [Indexed: 11/28/2022]
Abstract
Interactions of the presynaptic protein α-synuclein with membranes are involved in its physiological action as well as in the pathological misfolding and aggregation related to Parkinsons's disease. We studied the conformation and orientation of α-synuclein bound to model vesicular membranes using multiparametric response polarity-sensitive fluorescent probes together with CD and EPR measurements. At low lipid to α-synuclein ratio the protein binds membranes through its N-terminal domain. When lipids are in excess, the α-helical content and the role of the C-terminus in binding increase. Highly rigid membranes also induce a greater α-helical content and a lower polarity of the protein microenvironment.
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Affiliation(s)
- Volodymyr V Shvadchak
- Laboratory of Cellular Dynamics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany.
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Afri M, Naqqash ME, Frimer AA. Using fluorescence to locate intercalants within the lipid bilayer of liposomes, bioliposomes and erythrocyte ghosts. Chem Phys Lipids 2011; 164:759-65. [PMID: 21939642 DOI: 10.1016/j.chemphyslip.2011.09.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2011] [Revised: 08/15/2011] [Accepted: 09/06/2011] [Indexed: 11/15/2022]
Abstract
In previous work, we have shown the utility of the "NMR technique" in locating intercalants within the lipid bilayer. We describe herein the development of a more sensitive and complementary "fluorescence technique" for this purpose and its application to liposomes, bioliposomes and erythrocyte ghosts. This technique is based on the observation in selected compounds of an excellent correlation between the emission wavelength (λ(em)) and Dimroth-Reichardt E(T)(30) polarity parameter for the solvent in which the fluorescence emission spectrum was obtained.
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Affiliation(s)
- Michal Afri
- Department of Chemistry, Bar Ilan University, Ramat Gan, Israel.
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Shvadchak VV, Falomir-Lockhart LJ, Yushchenko DA, Jovin TM. Specificity and kinetics of alpha-synuclein binding to model membranes determined with fluorescent excited state intramolecular proton transfer (ESIPT) probe. J Biol Chem 2011; 286:13023-32. [PMID: 21330368 DOI: 10.1074/jbc.m110.204776] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Parkinson disease is characterized cytopathologically by the deposition in the midbrain of aggregates composed primarily of the presynaptic neuronal protein α-synuclein (AS). Neurotoxicity is currently attributed to oligomeric microaggregates subjected to oxidative modification and promoting mitochondrial and proteasomal dysfunction. Unphysiological binding to membranes of these and other organelles is presumably involved. In this study, we performed a systematic determination of the influence of charge, phase, curvature, defects, and lipid unsaturation on AS binding to model membranes using a new sensitive solvatochromic fluorescent probe. The interaction of AS with vesicular membranes is fast and reversible. The protein dissociates from neutral membranes upon thermal transition to the liquid disordered phase and transfers to vesicles with higher affinity. The binding of AS to neutral and negatively charged membranes occurs by apparently different mechanisms. Interaction with neutral bilayers requires the presence of membrane defects; binding increases with membrane curvature and rigidity and decreases in the presence of cholesterol. The association with negatively charged membranes is much stronger and much less sensitive to membrane curvature, phase, and cholesterol content. The presence of unsaturated lipids increases binding in all cases. These findings provide insight into the relation between membrane physical properties and AS binding affinity and dynamics that presumably define protein localization in vivo and, thereby, the role of AS in the physiopathology of Parkinson disease.
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Affiliation(s)
- Volodymyr V Shvadchak
- Laboratory of Cellular Dynamics, Max Planck Institute for Biophysical Chemistry, am Fassberg 11, 37077 Göttingen, Germany
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Moszynski JM, Fyles TM. Synthesis and ion transport activity of oligoesters containing an environment-sensitive fluorophore. Org Biomol Chem 2011; 9:7468-75. [DOI: 10.1039/c1ob06047c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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