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Dwivedi A, Mazumder A, Pullmannová P, Paraskevopoulou A, Opálka L, Kováčik A, Macháček M, Jančálková P, Svačinová P, Peterlik H, Maixner J, Vávrová K. Lipid Monolayer on Cell Surface Protein Templates Functional Extracellular Lipid Assembly. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2307793. [PMID: 38243890 DOI: 10.1002/smll.202307793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 12/18/2023] [Indexed: 01/22/2024]
Abstract
When the ancestors of men moved from aquatic habitats to the drylands, their evolutionary strategy to restrict water loss is to seal the skin surface with lipids. It is unknown how these rigid ceramide-dominated lipids with densely packed chains squeeze through narrow extracellular spaces and how they assemble into their complex multilamellar architecture. Here it is shown that the human corneocyte lipid envelope, a monolayer of ultralong covalently bound lipids on the cell surface protein, templates the functional barrier assembly by partly fluidizing and rearranging the free extracellular lipids in its vicinity during the sculpting of a functional skin lipid barrier. The lipid envelope also maintains the fluidity of the extracellular lipids during mechanical stress. This local lipid fluidization does not compromise the permeability barrier. The results provide new testable hypotheses about epidermal homeostasis and the pathophysiology underlying diseases with impaired lipid binding to corneocytes, such as congenital ichthyosis. In a broader sense, this lipoprotein-mediated fluidization of rigid (sphingo)lipid patches may also be relevant to lipid rafts and cellular signaling events and inspire new functional materials.
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Affiliation(s)
- Anupma Dwivedi
- Skin Barrier Research Group, Faculty of Pharmacy, Charles University, Heyrovského 1203, Hradec Králové, 50005, Czech Republic
| | - Anisha Mazumder
- Skin Barrier Research Group, Faculty of Pharmacy, Charles University, Heyrovského 1203, Hradec Králové, 50005, Czech Republic
| | - Petra Pullmannová
- Skin Barrier Research Group, Faculty of Pharmacy, Charles University, Heyrovského 1203, Hradec Králové, 50005, Czech Republic
| | - Anna Paraskevopoulou
- Skin Barrier Research Group, Faculty of Pharmacy, Charles University, Heyrovského 1203, Hradec Králové, 50005, Czech Republic
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Charles University, Heyrovského 1203, Hradec Králové, 50005, Czech Republic
| | - Lukáš Opálka
- Skin Barrier Research Group, Faculty of Pharmacy, Charles University, Heyrovského 1203, Hradec Králové, 50005, Czech Republic
| | - Andrej Kováčik
- Skin Barrier Research Group, Faculty of Pharmacy, Charles University, Heyrovského 1203, Hradec Králové, 50005, Czech Republic
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Charles University, Heyrovského 1203, Hradec Králové, 50005, Czech Republic
| | - Miloslav Macháček
- Department of Biochemical Sciences, Faculty of Pharmacy, Charles University, Heyrovského 1203, Hradec Králové, 50005, Czech Republic
| | - Pavla Jančálková
- Skin Barrier Research Group, Faculty of Pharmacy, Charles University, Heyrovského 1203, Hradec Králové, 50005, Czech Republic
| | - Petra Svačinová
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Charles University, Heyrovského 1203, Hradec Králové, 50005, Czech Republic
| | - Herwig Peterlik
- Faculty of Physics, University of Vienna, Boltzmanngasse 5, Vienna, 1090, Austria
| | - Jaroslav Maixner
- Faculty of Chemical Technology, University of Chemistry and Technology Prague, Technická 5, Prague, 16628, Czech Republic
| | - Kateřina Vávrová
- Skin Barrier Research Group, Faculty of Pharmacy, Charles University, Heyrovského 1203, Hradec Králové, 50005, Czech Republic
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Ahmed I, Das N, Islam AKMM, Plaisier JR, Parisse P, Bal JK. Interfacial Interactions of a Myoglobin/DOPC Hybrid System at the Air-Water Interface and Its Physicochemical Properties. ACS OMEGA 2023; 8:30199-30212. [PMID: 37636970 PMCID: PMC10448488 DOI: 10.1021/acsomega.3c02909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 07/31/2023] [Indexed: 08/29/2023]
Abstract
In the present study, the intermolecular interactions between a water-insoluble phospholipid (DOPC) and water-soluble protein (myoglobin) and the interaction among themselves were investigated at the air-water interface using the Langmuir and Langmuir-Blodgett techniques. The effects of changes in physicochemical factors, like pH and temperature, on these interactions were also examined. Surface pressure-molecular area (π-A) isotherms of the DOPC monolayer at the air-water interface, with and without myoglobin (Myo) revealed the evolution of various physical properties, such as elastic, thermodynamic, and hysteric properties, in response to changes in subphase pH and temperature. With the increment of subphase pH from 5 to 7 at a fixed temperature (20 °C), the DOPC isotherm expanded, and the in-plane elasticity (CS-1) decreased, but no significant presence of hysteresis was encountered in either of the pH values. On the other hand, a diminution of temperature (from 20 to 5 °C) leads to an expansion of monolayers yielding low elasticity and significant hysteresis. The incorporation of Myo molecules within the DOPC monolayer decreased the CS-1 value of the DOPC monolayer. Such a decrement in CS-1 was also encountered while increasing the pH and decreasing the temperature (T) of the subphase in the absence of Myo. Systematic expansion of DOPC isotherm and increased hysteric area with the increase in Myo proportion were observed and the atomic force microscopy (AFM) observations suggested a strong conjugation between Myo and DOPC in the mixed monolayer. The denaturation effect of Myo molecules was studied using AFM at different temperatures. Furthermore, the Myo molecules were found to be most surface active at pH = 7, which is very close to its isoelectric point. These observations come up with the interaction mechanism between biomolecules under dynamically varied conditions.
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Affiliation(s)
- Ikbal Ahmed
- Department
of Physics, Aliah University, Kolkata 700160, India
- International
Centre for Theoretical Sciences, Tata Institute
of Fundamental Research, Bengaluru 560089, India
| | - Nilanjan Das
- Abhedananda
Mahavidyalaya, University of Burdwan, Sainthia 731234, India
| | | | - Jasper Rikkert Plaisier
- Elettra-Sincrotrone
Trieste S.C.p.A., S.S.
14 Km 163,5 in Area Science Park, Basovizza, Trieste 34149, Italy
| | - Pietro Parisse
- Elettra-Sincrotrone
Trieste S.C.p.A., S.S.
14 Km 163,5 in Area Science Park, Basovizza, Trieste 34149, Italy
- Istituto
Officina dei Materiali—Consiglio Nazionale delle Ricerche, S.S. 14 Km 163,5 in Area Science
Park, Basovizza, Trieste 34149, Italy
| | - Jayanta Kumar Bal
- Abhedananda
Mahavidyalaya, University of Burdwan, Sainthia 731234, India
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Felsztyna I, Perillo MA, Clop EM. Nanoarchitectonic approaches for measuring the catalytic behavior of a membrane anchored enzyme. From Langmuir-Blodgett to a novel Langmuir-Schaefer based nanofilm building device. BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2023; 1865:184177. [PMID: 37225031 DOI: 10.1016/j.bbamem.2023.184177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 04/22/2023] [Accepted: 05/15/2023] [Indexed: 05/26/2023]
Abstract
Self-organized lipid monolayers at the air-water interface (Langmuir films, LF) are commonly used for measuring the catalytic properties of membrane-bound enzymes. This methodology allows to provide a consistent flat topography molecular density, packing defects and thickness. The aim of the present work was to show the methodological advantages of using the horizontal transfer method (Langmuir-Schaefer) with respect to the vertical transfer method (Langmuir-Blodgett) when mounting a device to measure catalytic activity of membrane enzymes. Based on the results obtained we can conclude that it is possible to prepare stable Langmuir-Blodgett (LB) and Langmuir-Schaefer (LS) films from Bovine Erythrocyte Membranes (BEM) preserving the catalytic activity of its native Acetylcholinesterase (BEA). In comparison, the LS films showed Vmax values more similar to the enzyme present in the vesicles of natural membranes. In addition, it was much easier to produce large amounts of transferred areas with the horizontal transfer methodology. It was possible to decrease the time required to mount an assay with numerous activity points, such as building activity curves as a function of substrate concentration. The present results show that LSBEM provides a proof of concept for the development of biosensors based on transferred purified membrane for the screening of new products acting on an enzyme embedded on its natural milieu. In the case of BEA, the application of these enzymatic sensors could have medical interest, providing drug screening tools for the treatment of Alzheimer's disease.
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Affiliation(s)
- Iván Felsztyna
- Universidad Nacional de Córdoba, Facultad de Ciencias Exactas, Físicas y Naturales, Departamento de Química, Cátedra de Química Biológica, Córdoba, Argentina; CONICET, Instituto de Investigaciones Biológicas y Tecnológicas (IIByT), Córdoba, Argentina
| | - María A Perillo
- Universidad Nacional de Córdoba, Facultad de Ciencias Exactas, Físicas y Naturales, Departamento de Química, Cátedra de Química Biológica, Córdoba, Argentina; CONICET, Instituto de Investigaciones Biológicas y Tecnológicas (IIByT), Córdoba, Argentina
| | - Eduardo M Clop
- Universidad Nacional de Córdoba, Facultad de Ciencias Exactas, Físicas y Naturales, Departamento de Química, Cátedra de Química Biológica, Córdoba, Argentina; CONICET, Instituto de Investigaciones Biológicas y Tecnológicas (IIByT), Córdoba, Argentina.
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Müller GA, Müller TD. (Patho)Physiology of Glycosylphosphatidylinositol-Anchored Proteins I: Localization at Plasma Membranes and Extracellular Compartments. Biomolecules 2023; 13:biom13050855. [PMID: 37238725 DOI: 10.3390/biom13050855] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 05/11/2023] [Accepted: 05/13/2023] [Indexed: 05/28/2023] Open
Abstract
Glycosylphosphatidylinositol (GPI)-anchored proteins (APs) are anchored at the outer leaflet of plasma membranes (PMs) of all eukaryotic organisms studied so far by covalent linkage to a highly conserved glycolipid rather than a transmembrane domain. Since their first description, experimental data have been accumulating for the capability of GPI-APs to be released from PMs into the surrounding milieu. It became evident that this release results in distinct arrangements of GPI-APs which are compatible with the aqueous milieu upon loss of their GPI anchor by (proteolytic or lipolytic) cleavage or in the course of shielding of the full-length GPI anchor by incorporation into extracellular vesicles, lipoprotein-like particles and (lyso)phospholipid- and cholesterol-harboring micelle-like complexes or by association with GPI-binding proteins or/and other full-length GPI-APs. In mammalian organisms, the (patho)physiological roles of the released GPI-APs in the extracellular environment, such as blood and tissue cells, depend on the molecular mechanisms of their release as well as the cell types and tissues involved, and are controlled by their removal from circulation. This is accomplished by endocytic uptake by liver cells and/or degradation by GPI-specific phospholipase D in order to bypass potential unwanted effects of the released GPI-APs or their transfer from the releasing donor to acceptor cells (which will be reviewed in a forthcoming manuscript).
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Affiliation(s)
- Günter A Müller
- Institute for Diabetes and Obesity (IDO), Helmholtz Diabetes Center (HDC) at Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Ingolstädter Landstraße 1, 85764 Oberschleissheim, Germany
- German Center for Diabetes Research (DZD), 85764 Oberschleissheim, Germany
| | - Timo D Müller
- Institute for Diabetes and Obesity (IDO), Helmholtz Diabetes Center (HDC) at Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Ingolstädter Landstraße 1, 85764 Oberschleissheim, Germany
- German Center for Diabetes Research (DZD), 85764 Oberschleissheim, Germany
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Clop EM, Fraceto LF, Miguel V, Gastaldi S, de Paula E, Perillo MA. Combined in-silico and in-vitro experiments support acid-base equilibrium as a tool to estimate the localization depth of 4-nitrophenol within a phospholipid bilayer. BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2022; 1864:184009. [PMID: 35896126 DOI: 10.1016/j.bbamem.2022.184009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 07/09/2022] [Accepted: 07/14/2022] [Indexed: 06/15/2023]
Abstract
The interaction and location of 4-nitrophenol (PNP) in biomembranes are relevant in the bioaccumulation and potentiation of the intensive toxic effects of this persistent organic pollutant. In this work, in-silico analyses predicted that, in a fluid phospholipid bilayer, the minimum energy of the protonated (PNPH) and deprotonated (PNP-) species is located within the glycerol and choline region, respectively. This was experimentally confirmed by acid-base equilibrium experiments and theory, allowing the estimation of the mean location of PNP within a bilayer region with a dielectric constant D = 50.6 compatible with the phosphate/choline moiety of egg-yolk phosphatidylcholine unilamellar (EPC) vesicles. The comparison with the D = 43.2 value obtained in Triton X-100 micelles allow predicting a mean surface potential of ψ = 25.37 mV for the EPC-water interface. Changes in the chemical shifts and longitudinal relaxation times of EPC hydrogens by 1H NMR confirm the deeper location of the PNPH within the glycerol region and at the choline region (PNP-) at higher pH. Intermolecular PNP-EPC dipolar interactions within the choline region was also demonstrated at pH 10.2 using ROESY experiments. Additional information was obtained trough 31P NMR, that detected an increase in the anisotropy at the membrane interface after insertion of PNP which probably act as a bridge between choline moieties rigidizing the crystalline structure at that spot. Concluding, here we provide experimental support to the "pH-piston hypothesis" proposed some decades ago in the pharmaceutical field, and that reinforce the importance of the environmental conditions (e.g. pH) to modulate the bioavailability of this highly toxic pollutant.
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Affiliation(s)
- Eduardo M Clop
- Universidad Nacional de Córdoba, Facultad de Ciencias Exactas, Físicas y Naturales, ICTA and Departamento de Química, Cátedra de Química Biológica, Av. Vélez Sársfield 1611, 5016 Córdoba, Argentina; CONICET-Universidad Nacional de Córdoba, Instituto de Investigaciones Biológicas y Tecnológicas (IIByT), Córdoba, Argentina
| | - Leonardo F Fraceto
- Depto de Engenharia Ambiental, Universidade Estadual Paulista Julio de Mesquita Filho, Sorocaba, SP, Brazil
| | - Virginia Miguel
- Universidad Nacional de Córdoba, Facultad de Ciencias Exactas, Físicas y Naturales, ICTA and Departamento de Química, Cátedra de Química Biológica, Av. Vélez Sársfield 1611, 5016 Córdoba, Argentina; CONICET-Universidad Nacional de Córdoba, Instituto de Investigaciones Biológicas y Tecnológicas (IIByT), Córdoba, Argentina
| | - Salomé Gastaldi
- Universidad Nacional de Córdoba, Facultad de Ciencias Exactas, Físicas y Naturales, ICTA and Departamento de Química, Cátedra de Química Biológica, Av. Vélez Sársfield 1611, 5016 Córdoba, Argentina; CONICET-Universidad Nacional de Córdoba, Instituto de Investigaciones Biológicas y Tecnológicas (IIByT), Córdoba, Argentina
| | - Eneida de Paula
- Depto de Bioquímica e Biologia Tecidual, Inst. Biologia, Universidade Estadual de Campinas, SP, Brazil
| | - María Angélica Perillo
- Universidad Nacional de Córdoba, Facultad de Ciencias Exactas, Físicas y Naturales, ICTA and Departamento de Química, Cátedra de Química Biológica, Av. Vélez Sársfield 1611, 5016 Córdoba, Argentina; CONICET-Universidad Nacional de Córdoba, Instituto de Investigaciones Biológicas y Tecnológicas (IIByT), Córdoba, Argentina.
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Oliveira ON, Caseli L, Ariga K. The Past and the Future of Langmuir and Langmuir-Blodgett Films. Chem Rev 2022; 122:6459-6513. [PMID: 35113523 DOI: 10.1021/acs.chemrev.1c00754] [Citation(s) in RCA: 122] [Impact Index Per Article: 61.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The Langmuir-Blodgett (LB) technique, through which monolayers are transferred from the air/water interface onto a solid substrate, was the first method to allow for the controlled assembly of organic molecules. With its almost 100 year history, it has been the inspiration for most methods to functionalize surfaces and produce nanocoatings, in addition to serving to explore concepts in molecular electronics and nanoarchitectonics. This paper provides an overview of the history of Langmuir monolayers and LB films, including the potential use in devices and a discussion on why LB films are seldom considered for practical applications today. Emphasis is then given to two areas where these films offer unique opportunities, namely, in mimicking cell membrane models and exploiting nanoarchitectonics concepts to produce sensors, investigate molecular recognitions, and assemble molecular machines. The most promising topics for the short- and long-term prospects of the LB technique are also highlighted.
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Affiliation(s)
- Osvaldo N Oliveira
- São Carlos Institute of Physics, University of Sao Paulo, CP 369, 13560-970 Sao Carlos, SP, Brazil
| | - Luciano Caseli
- Department of Chemistry, Federal University of São Paulo, 09913-030 Diadema, SP, Brazil
| | - Katsuhiko Ariga
- World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 305-0044 Tsukuba, Japan.,Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-0827, Japan
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Malik A, Seeberger PH, Brezesinski G, Varón Silva D. Zwitterionic Character and Lipid Composition Determine the Behaviour of Glycosylphosphatidylinositol Fragments in Monolayers. Chemphyschem 2021; 22:757-763. [PMID: 33586851 PMCID: PMC8251720 DOI: 10.1002/cphc.202100002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 02/12/2021] [Indexed: 11/20/2022]
Abstract
Glycosylphosphatidylinositols (GPIs) are complex glycolipids found in free form or anchoring proteins to the outer leaflet of the cell membrane in eukaryotes. GPIs have been associated with the formation of lipid rafts and protein sorting on membranes. The presence of a conserved glycan core with cell-specific modifications together with lipid remodelling during biosynthesis suggest that the properties of the glycolipids are being fine-tuned. We synthesized a series of GPI fragments and evaluated the interactions and arrangement of these glycolipids in monolayers as a 2-D membrane model. GIXD and IRRAS analyses showed the need of N-acetylglucosamine deacetylation for the formation of hydrogen bonds to obtain highly structured domains in the monolayers and an effect of the unsaturated lipids in formation and localization of the glycolipids within or between membrane microdomains. These results contribute to understand the role of these glycolipids and their modifications in the organization of membranes.
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Affiliation(s)
- Ankita Malik
- Department of Biomolecular SystemsMax Planck Institute of Colloids and InterfacesAm Muehlenberg 114476PotsdamGermany
- Department of Chemistry and BiochemistryFreie Universität BerlinArnimallee 2214195BerlinGermany
| | - Peter H. Seeberger
- Department of Biomolecular SystemsMax Planck Institute of Colloids and InterfacesAm Muehlenberg 114476PotsdamGermany
- Department of Chemistry and BiochemistryFreie Universität BerlinArnimallee 2214195BerlinGermany
| | - Gerald Brezesinski
- Department of Biomolecular SystemsMax Planck Institute of Colloids and InterfacesAm Muehlenberg 114476PotsdamGermany
| | - Daniel Varón Silva
- Department of Biomolecular SystemsMax Planck Institute of Colloids and InterfacesAm Muehlenberg 114476PotsdamGermany
- Department of Chemistry and BiochemistryFreie Universität BerlinArnimallee 2214195BerlinGermany
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Müller GA, Ussar S, Tschöp MH, Müller TD. Age-dependent membrane release and degradation of full-length glycosylphosphatidylinositol-anchored proteins in rats. Mech Ageing Dev 2020; 190:111307. [PMID: 32628941 DOI: 10.1016/j.mad.2020.111307] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 06/18/2020] [Accepted: 06/29/2020] [Indexed: 01/28/2023]
Abstract
Glycosylphosphatidylinositol (GPI)-anchored proteins (GPI-APs) are associated with the surface of eucaryotic cells only through a covalently coupled carboxy-terminal GPI glycolipid structure which is anchored at the outer leaflet of plasma membranes. This mode of membrane association may be responsible for the recent observations that full-length GPI-APs harbouring the complete GPI anchor are (i) released from isolated rat adipocytes in vitro and (ii) expressed in rat and human serum. The upregulation of the adipocyte release in response to increased cell size and blood glucose/insulin levels of the donor rats and downregulation of the expression in serum of insulin resistant and diabetic rats have been reconciled with enhanced degradation of the full-length GPI-APs released into micelle-like complexes together with (lyso) phospholipids and cholesterol by serum GPI-specific phospholipase D (GPI-PLD). Here by using a sensitive and reliable sensing method for full-length GPI-APs, which relies on surface acoustic waves propagating over microfluidic chips, the upregulation of (i) the release of the full-length GPI-APs CD73, alkaline phosphatase and CD55 from isolated adipocyte plasma membranes monitored in a "lab-on-the-chip" configuration, (ii) their release from isolated rat adipocytes into the incubation medium and (iii) the lipolytic cleavage of their GPI anchors in serum was demonstrated to increase with age (3-16 weeks) and body weight (87-477 g) of (healthy) donor rats. In contrast, the amount of full-length GPI-APs in rat serum, as determined by chip-based sensing, turned out to decline with age/body weight. These correlations suggest that age-/weight-induced alterations (in certain biophysical/biochemical characteristics) of plasma membranes are responsible for the release of full-length GPI-APs which becomes counteracted by elevated GPI-PLD activity in serum. Thus, sensitive and specific measurement of these GPI-AP-relevant parameters may be useful for monitoring of age-related cell surface changes, in general, and diseases, in particular.
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Affiliation(s)
- Günter A Müller
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center (HDC) at Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Oberschleissheim, Germany; German Center for Diabetes Research (DZD), Oberschleissheim, Germany; Department Biology I, Genetics, Ludwig-Maximilians-Universität München, Planegg, Martinsried, Germany.
| | - Siegfried Ussar
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center (HDC) at Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Oberschleissheim, Germany; German Center for Diabetes Research (DZD), Oberschleissheim, Germany; Division of Metabolic Diseases, Department of Medicine, Technische Universität München, München, Germany
| | - Matthias H Tschöp
- German Center for Diabetes Research (DZD), Oberschleissheim, Germany; Division of Metabolic Diseases, Department of Medicine, Technische Universität München, München, Germany; Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Oberschleissheim, Germany
| | - Timo D Müller
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center (HDC) at Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Oberschleissheim, Germany; German Center for Diabetes Research (DZD), Oberschleissheim, Germany; Department of Pharmacology and Experimental Therapy, Institute of Experimental and Clinical Pharmacology and Toxicology, Eberhard Karls University Hospitals and Clinics, Tübingen, Germany
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Müller GA, Tschöp MH, Müller TD. Upregulated phospholipase D activity toward glycosylphosphatidylinositol-anchored proteins in micelle-like serum complexes in metabolically deranged rats and humans. Am J Physiol Endocrinol Metab 2020; 318:E462-E479. [PMID: 31961708 DOI: 10.1152/ajpendo.00504.2019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Glycosylphosphatidylinositol-anchored proteins (GPI-AP) with the complete glycolipid anchor attached have previously been shown to be released from the outer plasma membrane leaflet of rat adipocytes in positive correlation to cell size and blood glucose/insulin levels of the donor rats. Furthermore, they are present in rat and human serum, however, at amounts that are lower in insulin-resistant/obese rats compared with normal ones. These findings prompted further evaluation of the potential of full-length GPI-AP for the prediction and stratification of metabolically deranged states. A comparison of the signatures of horizontal surface acoustic waves that were generated by full-length GPI-AP in the course of their specific capture by and subsequent dissociation from a chip-based sensor between those from rat serum and those reconstituted into lipidic structures strongly argues for expression of full-length GPI-AP in serum in micelle-like complexes in concert with phospholipids, lysophospholipids, and cholesterol. Both the reconstituted and the rat serum complexes were highly sensitive toward mechanical forces, such as vibration. Furthermore, full-length GPI-AP reconstituted into micelle-like complexes represented efficient substrates for cleavage by serum glycosylphosphatidylinositol-specific phospholipase D (GPI-PLD). These findings raised the possibility that the upregulated release of full-length GPI-AP into micelle-like serum complexes from metabolically deranged cells is compensated by elevated GPI-PLD activity. In fact, serum GPI-PLD activity toward full-length GPI-AP in micelle-like complexes, but not in detergent micelles, was positively correlated to early states of insulin resistance and obesity in genetic and diet-induced rat models as well as to the body weight in humans. Moreover, the differences in the degradation of GPI-AP in micelle-like complexes were found to rely in part on the interaction of serum GPI-PLD with an activating serum factor. These data suggest that serum GPI-PLD activity measured with GPI-AP in micelle-like complexes is indicative of enhanced release of full-length GPI-AP from relevant tissues into the circulation as a consequence of early metabolic derangement in rats and humans.
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Affiliation(s)
- Günter A Müller
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center (HDC) at Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Oberschleissheim, Germany
- German Center for Diabetes Research (DZD), Oberschleissheim, Germany
- Department Biology I, Genetics, Ludwig-Maximilians-Universität München, Planegg-Martinsried, Germany
| | - Matthias H Tschöp
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center (HDC) at Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Oberschleissheim, Germany
- German Center for Diabetes Research (DZD), Oberschleissheim, Germany
- Division of Metabolic Diseases, Department of Medicine, Technische Universität München, München, Germany
| | - Timo D Müller
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center (HDC) at Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Oberschleissheim, Germany
- German Center for Diabetes Research (DZD), Oberschleissheim, Germany
- Department of Pharmacology and Experimental Therapy, Institute of Experimental and Clinical Pharmacology and Toxicology, Eberhard Karls University Hospitals and Clinics, Tübingen, Germany
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CASELI LUCIANO. Enzymes immobilized in Langmuir-Blodgett films: Why determining the surface properties in Langmuir monolayer is important? ACTA ACUST UNITED AC 2018; 90:631-644. [DOI: 10.1590/0001-3765201720170453] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Accepted: 07/26/2017] [Indexed: 01/02/2023]
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11
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Wang KH, Hsu WP, Chen LH, Lin WD, Lee YL. Extensibility effect of poly(3-hexylthiophene) on the glucose sensing performance of mixed poly(3-hexylthiophene)/octadecylamine/glucose oxidase Langmuir-Blodgett films. Colloids Surf B Biointerfaces 2017; 155:104-110. [PMID: 28411475 DOI: 10.1016/j.colsurfb.2017.04.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Revised: 03/24/2017] [Accepted: 04/04/2017] [Indexed: 11/18/2022]
Abstract
Poly(3-hexylthiophene) (P3HT) is utilized as a material to enhance the glucose sensing performance of glucose oxidase (GOx) Langmuir-Blodgett (LB) films. To enhance the extensibility and homogeneity of the P3HT in the LB films, octadecylamine (ODA) is introduced. The characteristics of the mixed P3HT/ODA Langmuir monolayers are investigated first and then, utilized as template layers to adsorb GOx from the subphase, preparing P3HT/ODA/GOx Langmuir-Blodgett films for glucose sensing. The results show that P3HT molecules tend to aggregate at the air/liquid interface and, furthermore, the P3HT monolayer has a weak ability to adsorb GOx from the subphase. By using mixed P3HT/ODA monolayer, the presence of ODA not only inhibits the aggregation of P3HT, but also increases the adsorption ability of the monolayer to GOx. The extensibility of P3HT and the homogeneity of the P3HT/ODA monolayers are closely related to the concentration of P3HT/ODA stock solutions. On the glucose sensing experiments, the performance of the P3HT/ODA/GOx LB film is greatly improved due to the presence of P3HT and, furthermore, the sensibility increases with increasing extensibility of P3HT molecules. The best sensitivity achieved for the P3HT/ODA/GOx film is 5.4μAmM-1cm-2 which is over two times the value obtained by the ODA/GOx film (2.3μAmM-1cm-2).
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Affiliation(s)
- Ke-Hsuan Wang
- Department of Chemical Engineering, National Cheng Kung University, Tainan, 70101, Taiwan; Department of Industrial Chemistry, Tokyo University of Science, Tokyo, 36063, Japan
| | - Wen-Ping Hsu
- Department of Chemical Engineering, National United University, Miao-Li, 36063, Taiwan
| | - Liang-Huei Chen
- Department of Medicinal Chemistry, Chia-Nan University of Pharmacy and Science, Tainan, 71710, Taiwan
| | - Wei-Don Lin
- Department of Chemical Engineering, National Cheng Kung University, Tainan, 70101, Taiwan
| | - Yuh-Lang Lee
- Department of Chemical Engineering, National Cheng Kung University, Tainan, 70101, Taiwan.
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12
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Wong DE, Senecal KJ, Goddard JM. Immobilization of chymotrypsin on hierarchical nylon 6,6 nanofiber improves enzyme performance. Colloids Surf B Biointerfaces 2017; 154:270-278. [DOI: 10.1016/j.colsurfb.2017.03.033] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 02/17/2017] [Accepted: 03/14/2017] [Indexed: 01/20/2023]
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13
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Effect of the presence of cholesterol in the interfacial microenvironment on the modulation of the alkaline phosphatase activity during in vitro mineralization. Colloids Surf B Biointerfaces 2017; 155:466-476. [PMID: 28472750 DOI: 10.1016/j.colsurfb.2017.04.051] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 04/20/2017] [Accepted: 04/25/2017] [Indexed: 01/17/2023]
Abstract
Mineralization of the skeleton starts within cell-derived matrix vesicles (MVs); then, minerals propagate to the extracellular collagenous matrix. Tissue-nonspecific alkaline phosphatase (TNAP) degrades inorganic pyrophosphate (PPi), a potent inhibitor of mineralization, and contributes Pi (Phosphate) from ATP to initiate mineralization. Compared to the plasma membrane, MVs are rich in Cholesterol (Chol) (∼32%) and TNAP, but how Chol influences TNAP activity remains unclear. We have reconstituted TNAP in liposomes of dipalmitoylphosphatidylcholine (DPPC) or dioleoylphosphatidylcholine (DOPC) combined with Chol or its derivatives Cholestenone (Achol) and Ergosterol (Ergo). DPPC plus 36% sterols in liposome increased the catalytic activity of TNAP toward ATP. The presence of Chol also increased the propagation of minerals by 3.4-fold. The catalytic efficiency of TNAP toward ATP was fourfold lower in DOPC proteoliposomes as compared to DPPC proteoliposomes. DOPC proteoliposomes also increased biomineralization by 2.8-fold as compared to DPPC proteoliposomes. TNAP catalyzed the hydrolysis of ATP more efficiently in the case of the proteoliposome consisting of DOPC with 36% Chol. The same behavior emerged with Achol and Ergo. The organization of the lipid and the structure of the sterol influenced the surface tension (γ), the TNAP phosphohydrolytic activity in the monolayer, and the TNAP catalytic efficiency in the bilayers. Membranes in the Lα phase (Achol) provided better kinetic parameters as compared to membranes in the Lo phase (Chol and Ergo). In conclusion, the physical properties and the lateral organization of lipids in proteoliposomes are crucial to control mineral propagation mediated by TNAP activity during mineralization.
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14
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Diociaiuti M, Giordani C, Kamel GS, Brasili F, Sennato S, Bombelli C, Meneses KY, Giraldo MA, Bordi F. Monosialoganglioside-GM1 triggers binding of the amyloid-protein salmon calcitonin to a Langmuir membrane model mimicking the occurrence of lipid-rafts. Biochem Biophys Rep 2016; 8:365-375. [PMID: 28955978 PMCID: PMC5614544 DOI: 10.1016/j.bbrep.2016.10.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 09/08/2016] [Accepted: 10/10/2016] [Indexed: 12/18/2022] Open
Abstract
GM1 ganglioside is known to be involved in the amyloid-associated diseases and it is a crucial factor for the assembly of amyloid proteins on lipid-rafts, which are lipid structures located on the synaptic plasma membranes. Due to its slow aggregation rate, we employed salmon calcitonin (sCT) as a suitable probe representative of amyloid proteins, to study the interaction between this class of proteins and a membrane model. Here, we prepared a neuronal membrane model by depositing onto mica two Langmuir-Blodgett films in liquid-condensed phase: the outer monolayer was characterized by high content of GM1 (50%) and minority parts of cholesterol and POPC (25-25%), while the inner one by plain POPC. To deeply investigate the interaction of sCT with this model and the role-played by GM1, we prepared the outer leaflet adding sCT at a concentration such that the number of proteins equals that of GM1. Atomic Force Microscopy revealed the occurrence of two distinct kinds of flat surfaces, with globular aggregates localized exclusively on top of the highest one. To unravel the nature of the interaction, we studied by ζ-potential technique liposomes composed as the outer leaflet of the model. Results demonstrated that an electrostatic interaction sCT-GM1 occurred. Finally, to investigate the interaction thermodynamics between sCT and the outer leaflet, Langmuir films as the outer monolayer and containing increasing content of sCT were studied by compression isotherms and Brewster Angle Microscopy experiments. Based on the all body of results we propose an interaction model where GM1 plays a pivotal role.
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Affiliation(s)
- Marco Diociaiuti
- Dipartimento di Tecnologie e Salute, Istituto Superiore di Sanità, I-00161 Roma, Italy
- Correspondence to: Dipartimento di Tecnologie e Salute, Istituto Superiore di Sanità, viale Regina Elena 299, 00161 Roma, Italy.
| | - Cristiano Giordani
- Dipartimento di Tecnologie e Salute, Istituto Superiore di Sanità, I-00161 Roma, Italy
- Instituto de Física, Universidad de Antioquia, Medellín, Colombia
| | - Gihan S. Kamel
- Department of Physics, Faculty of Science, Helwan University, Cairo, Egypt
- Dipartimento di Fisica and ISC-CNR, Sapienza Università di Roma, I-00185 Roma, Italy
| | - Francesco Brasili
- Dipartimento di Fisica and ISC-CNR, Sapienza Università di Roma, I-00185 Roma, Italy
| | - Simona Sennato
- Dipartimento di Fisica and ISC-CNR, Sapienza Università di Roma, I-00185 Roma, Italy
| | - Cecilia Bombelli
- CNR, Istituto di Metodologie Chimiche, Sezione Meccanismi di Reazione, c/o Dipartimento di Chimica, Università degli Studi di Roma “Sapienza”, I-00185 Roma, Italy
| | - Karen Y. Meneses
- Instituto de Física, Universidad de Antioquia, Medellín, Colombia
| | - Marco A. Giraldo
- Instituto de Física, Universidad de Antioquia, Medellín, Colombia
| | - Federico Bordi
- Dipartimento di Fisica and ISC-CNR, Sapienza Università di Roma, I-00185 Roma, Italy
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15
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Zare-Eelanjegh E, Bora DK, Rupper P, Schrantz K, Thöny-Meyer L, Maniura-Weber K, Richter M, Faccio G. Affinity-Driven Immobilization of Proteins to Hematite Nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2016; 8:20432-20439. [PMID: 27429157 DOI: 10.1021/acsami.6b03284] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Functional nanoparticles are valuable materials for energy production, bioelectronics, and diagnostic devices. The combination of biomolecules with nanosized material produces a new hybrid material with properties that can exceed the ones of the single components. Hematite is a widely available material that has found application in various sectors such as in sensing and solar energy production. We report a single-step immobilization process based on affinity and achieved by genetically engineering the protein of interest to carry a hematite-binding peptide. Fabricated hematite nanoparticles were then investigated for the immobilization of the two biomolecules C-phycocyanin (CPC) and laccase from Bacillus pumilus (LACC) under mild conditions. Genetic engineering of biomolecules with a hematite-affinity peptide led to a higher extent of protein immobilization and enhanced the catalytic activity of the enzyme.
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Affiliation(s)
- Elaheh Zare-Eelanjegh
- Laboratory for Biointerfaces, Empa, Swiss Federal Laboratories for Materials Science and Technology , Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland
| | - Debajeet K Bora
- Laboratory for High Performance Ceramics, Empa, Swiss Federal Laboratories for Materials Science and Technology , Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - Patrick Rupper
- Laboratory for Advanced Fibers, Empa, Swiss Federal Laboratories for Materials Science and Technology , Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland
| | - Krisztina Schrantz
- Laboratory for High Performance Ceramics, Empa, Swiss Federal Laboratories for Materials Science and Technology , Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - Linda Thöny-Meyer
- Laboratory for Biointerfaces, Empa, Swiss Federal Laboratories for Materials Science and Technology , Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland
| | - Katharina Maniura-Weber
- Laboratory for Biointerfaces, Empa, Swiss Federal Laboratories for Materials Science and Technology , Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland
| | - Michael Richter
- Laboratory for Biointerfaces, Empa, Swiss Federal Laboratories for Materials Science and Technology , Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland
| | - Greta Faccio
- Laboratory for Biointerfaces, Empa, Swiss Federal Laboratories for Materials Science and Technology , Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland
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16
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Andrade MAR, Favarin B, Derradi R, Bolean M, Simão AMS, Millán JL, Ciancaglini P, Ramos AP. Pendant-drop method coupled to ultraviolet-visible spectroscopy: A useful tool to investigate interfacial phenomena. Colloids Surf A Physicochem Eng Asp 2016; 504:305-311. [PMID: 28190931 DOI: 10.1016/j.colsurfa.2016.05.085] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
UV-vis spectroscopy is a powerful tool to investigate surface phenomena. Surface tension measurements coupled to spectroscopic techniques can help to elucidate how the interface organization influences the electronic properties of molecules. However, appreciable sample volumes are usually necessary to achieve strong signals during conduction of experiments. This study reports on the simultaneous acquisition of surface tension data and UV-vis spectra by axisymmetric drop shape analysis (ADSA) coupled to diffuse reflectance (DRUV) spectrophotometry using a pendant microliter-drop that requires small sample volumes and low analyte concentrations. Three example systems gave evidence of the applicability of this technique: (a) disaggregation of an organic dye driven by surfactant as a function of the surface tension and alterations in the UV-vis spectra, (b) activity of a glycosylphosphatidylinositol anchored enzyme estimated from formation of a colored product, and (c) interaction between this enzyme and biomimetic membrane systems consisting of dipalmitoylphosphaditylcholine and cholestenone. Apart from using smaller sample volume, this coupled technique allowed to investigate interfacial organization in the light of electronic spectra obtained in loco within a shorter acquisition time. This procedure provided precise interfacial information about static and dynamic systems. This has been the first study describing the kinetic activity of an enzyme in the presence of phospholipid monolayers through simultaneous determination of the surface tension and UV-vis spectra.
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Affiliation(s)
- Marco A R Andrade
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901 Ribeirão Preto, São Paulo, Brazil
| | - Bruno Favarin
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901 Ribeirão Preto, São Paulo, Brazil
| | - Rafael Derradi
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901 Ribeirão Preto, São Paulo, Brazil
| | - Mayte Bolean
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901 Ribeirão Preto, São Paulo, Brazil
| | - Ana Maria S Simão
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901 Ribeirão Preto, São Paulo, Brazil
| | - José Luis Millán
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - Pietro Ciancaglini
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901 Ribeirão Preto, São Paulo, Brazil
| | - Ana P Ramos
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901 Ribeirão Preto, São Paulo, Brazil
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17
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Silkstone G, Wilson MT. A Further Investigation of the Effects of Extremely Low Frequency Magnetic Fields on Alkaline Phosphatase and Acetylcholinesterase. PLoS One 2016; 11:e0148369. [PMID: 26963611 PMCID: PMC4786325 DOI: 10.1371/journal.pone.0148369] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Accepted: 01/18/2016] [Indexed: 11/19/2022] Open
Abstract
Using a custom build spectrophotometer equipped with Helmholtz coils and designed to study the effects of magnetic fields on enzyme reactions in real-time we have investigated the influence of fields, from 100 μT to 10 mT and at a variety of field frequencies, on the membrane bound enzymes alkaline phosphatase and acetylcholinesterase. We have also employed other methods to apply a magnetic field, e.g. Biostim. In contrast to earlier reports we have been unable to detect any field effects on these enzymes under any field/frequency regime. We discuss possible reasons for the discrepancy between this and earlier work and note the particularly complex influence of small temperature changes that may confound analysis.
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Affiliation(s)
- Gary Silkstone
- School of Biology, University of Essex, Wivenhoe Park, Colchester, Essex, CO4 3SQ, United Kingdom
| | - Michael T. Wilson
- School of Biology, University of Essex, Wivenhoe Park, Colchester, Essex, CO4 3SQ, United Kingdom
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18
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Longo J, Garnier T, Mateescu M, Ponzio F, Schaaf P, Jierry L, Ball V. Stable Bioactive Enzyme-Containing Multilayer Films Based on Covalent Cross-Linking from Mussel-Inspired Adhesives. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:12447-12454. [PMID: 26509712 DOI: 10.1021/acs.langmuir.5b03329] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The use of immobilized enzymes is mandatory for the easy separation of the enzyme, the unreacted substrates, and the obtained products to allow repeated enzymatic assays without cumbersome purification steps. The immobilization procedure is however critical to obtain a high fraction of active enzyme. In this article, we present an enzyme immobilization strategy based on a catechol functionalized alginate. We demonstrate that alkaline phosphatase (ALP) remains active in multilayered films made with alginate modified with catechol moieties (AlgCat) for long duration, that is, up to 7 weeks, provided the multilayered architecture is cross-linked with sodium periodate. This cross-linking reaction allows to create covalent bonds between the amino groups of ALP and the quinone group carried by the modified alginate. In the absence of cross-linking, the enzymatic activity is rapidly lost and this reduction is mainly due to enzyme desorption. We also show that NaIO4 cross-linked (AlgCat-Alp)n films can be freeze-dried and reused at least 3 weeks later without lost in enzymatic activity.
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Affiliation(s)
- Johan Longo
- Institut Charles Sadron, Centre National de la Recherche Scientifique, Université de Strasbourg, UPR 22 , 23 rue du Loess, BP 84047, 67034, Strasbourg Cedex 2, France
| | - Tony Garnier
- Institut Charles Sadron, Centre National de la Recherche Scientifique, Université de Strasbourg, UPR 22 , 23 rue du Loess, BP 84047, 67034, Strasbourg Cedex 2, France
| | - Mihaela Mateescu
- Biomatériaux et Bioingénierie, INSERM, UMR-S 1121 , 11 rue Humann, 67085 Strasbourg Cedex, France
- Faculté de Chirurgie Dentaire, Université de Strasbourg , 8 rue Sainte Elisabeth. 67000 Strasbourg Cedex, France
| | - Florian Ponzio
- Biomatériaux et Bioingénierie, INSERM, UMR-S 1121 , 11 rue Humann, 67085 Strasbourg Cedex, France
- Faculté de Chirurgie Dentaire, Université de Strasbourg , 8 rue Sainte Elisabeth. 67000 Strasbourg Cedex, France
| | - Pierre Schaaf
- Institut Charles Sadron, Centre National de la Recherche Scientifique, Université de Strasbourg, UPR 22 , 23 rue du Loess, BP 84047, 67034, Strasbourg Cedex 2, France
- Biomatériaux et Bioingénierie, INSERM, UMR-S 1121 , 11 rue Humann, 67085 Strasbourg Cedex, France
- Faculté de Chirurgie Dentaire, Université de Strasbourg , 8 rue Sainte Elisabeth. 67000 Strasbourg Cedex, France
- Ecole de Chimie, Polymères et Matériaux, Université de Strasbourg , 25 rue Becquerel, 67087 Strasbourg, France
- Institut d'Etudes Avancées de l'Université de Strasbourg , 5 allée du Général Rouvillois, 67083 Strasbourg, France
- International Center for Frontier Research in Chemistry , 8 allée Gaspard Monge, 67083 Strasbourg, France
- Institut Universitaire de France , 103 boulevard Saint-Michel, 75005 Paris, France
| | - Loïc Jierry
- Institut Charles Sadron, Centre National de la Recherche Scientifique, Université de Strasbourg, UPR 22 , 23 rue du Loess, BP 84047, 67034, Strasbourg Cedex 2, France
- Ecole de Chimie, Polymères et Matériaux, Université de Strasbourg , 25 rue Becquerel, 67087 Strasbourg, France
- Institut d'Etudes Avancées de l'Université de Strasbourg , 5 allée du Général Rouvillois, 67083 Strasbourg, France
- International Center for Frontier Research in Chemistry , 8 allée Gaspard Monge, 67083 Strasbourg, France
| | - Vincent Ball
- Biomatériaux et Bioingénierie, INSERM, UMR-S 1121 , 11 rue Humann, 67085 Strasbourg Cedex, France
- Faculté de Chirurgie Dentaire, Université de Strasbourg , 8 rue Sainte Elisabeth. 67000 Strasbourg Cedex, France
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19
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Bolean M, Simão AMS, Kiffer-Moreira T, Hoylaerts MF, Millán JL, Itri R, Ciancaglini P. Proteoliposomes with the ability to transport Ca(2+) into the vesicles and hydrolyze phosphosubstrates on their surface. Arch Biochem Biophys 2015; 584:79-89. [PMID: 26325078 DOI: 10.1016/j.abb.2015.08.018] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 08/26/2015] [Accepted: 08/27/2015] [Indexed: 11/19/2022]
Abstract
We describe the production of stable DPPC and DPPC:DPPS-proteoliposomes harboring annexin V (AnxA5) and tissue-nonspecific alkaline phosphatase (TNAP) and their use to investigate whether the presence of AnxA5 impacts the kinetic parameters for hydrolysis of TNAP substrates at physiological pH. The best catalytic efficiency was achieved in DPPS 10%-proteoliposomes (molar ratio), conditions that also increased the specificity of TNAP hydrolysis of PPi. Melting behavior of liposomes and proteoliposomes was analyzed via differential scanning calorimetry. The presence of 10% DPPS in DPPC-liposomes causes a broadening of the transition peaks, with AnxA5 and TNAP promoting a decrease in ΔH values. AnxA5 was able to mediate Ca(2+)-influx into the DPPC and DPPC:DPPS 10%-vesicles at physiological Ca(2+) concentrations (∼2 mM). This process was not affected by the presence of TNAP in the proteoliposomes. However, AnxA5 significantly affects the hydrolysis of TNAP substrates. Studies with GUVs confirmed the functional reconstitution of AnxA5 in the mimetic systems. These proteoliposomes are useful as mimetics of mineralizing cell-derived matrix vesicles, known to be responsible for the initiation of endochondral ossification, as they successfully transport Ca(2+) and possess the ability to hydrolyze phosphosubstrates in the lipid-water interface.
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Affiliation(s)
- Maytê Bolean
- Depto. Química, FFCLRP-USP, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Ana Maria S Simão
- Depto. Química, FFCLRP-USP, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Tina Kiffer-Moreira
- Sanford Children's Health Research Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA
| | - Marc F Hoylaerts
- Department of Cardiovascular Sciences, Center for Molecular and Vascular Biology, University of Leuven, Leuven, Belgium
| | - José Luis Millán
- Sanford Children's Health Research Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA
| | - Rosangela Itri
- Depto. Física Aplicada, Instituto de Física, IF-USP, São Paulo, SP, Brazil
| | - Pietro Ciancaglini
- Depto. Química, FFCLRP-USP, Universidade de São Paulo, Ribeirão Preto, SP, Brazil.
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20
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Rodrigues D, Camilo FF, Caseli L. Cellulase and alcohol dehydrogenase immobilized in Langmuir and Langmuir-Blodgett films and their molecular-level effects upon contact with cellulose and ethanol. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:1855-1863. [PMID: 24471993 DOI: 10.1021/la500232w] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The key challenges for producing devices based on nanostructured films with control over the molecular architecture are to preserve the catalytic activity of the immobilized biomolecules and to provide a reliable method for determining the intermolecular interactions and the accommodation of molecules at very small scales. In this work, the enzymes cellulase and alcohol dehydrogenase (ADH) were coimmobilized with dipalmitoylphosphatidylcholine (DPPC) as Langmuir-Blodgett (LB) films, and their biological activities were assayed by accommodating the structure formed in contact with cellulose. For this purpose, the polysaccharide was dissolved in an ionic liquid, 1-buthyl-3-methylimidazolium chloride (BMImCl), and dropped on the top of the hybrid cellulase-ADH-DPPC LB film. The interactions between cellulose and ethanol, which are the catalytic substrates of the enzymes as well as important elements in the production of second-generation fuels, were then investigated using polarization-modulation infrared reflection-absorption spectroscopy (PM-IRRAS). Investigation of the secondary structures of the enzymes was performed using PM-IRRAS, through which the presence of ethanol and cellulose was observed to highly affect the structures of ADH and cellulase, respectively. The detection of products formed from the catalyzed reactions as well as the changes of secondary structure of the enzymes immobilization could be carried out, which opens the possibility to produce a means for producing second-generation ethanol using nanoscale arrangements.
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Affiliation(s)
- Dilmer Rodrigues
- Rua Sao Nicolau, 210, Laboratorio de Materiais Hibridos, Diadema, SP 09913-030, Brazil
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21
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Shrivastava S, Schneider MF. Opto-mechanical coupling in interfaces under static and propagative conditions and its biological implications. PLoS One 2013; 8:e67524. [PMID: 23861769 PMCID: PMC3701664 DOI: 10.1371/journal.pone.0067524] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Accepted: 05/19/2013] [Indexed: 11/18/2022] Open
Abstract
Fluorescent dyes are vital for studying static and dynamic patterns and pattern formation in cell biology. Emission properties of the dyes incorporated in a biological interface are known to be sensitive to their local environment. We report that the fluorescence intensity of dye molecules embedded in lipid interfaces is indeed a thermodynamic observable of the system. Opto-mechanical coupling of lipid-dye system was measured as a function of the thermodynamic state of the interface. The corresponding state diagrams quantify the thermodynamic coupling between intensity I and lateral pressure π. We further demonstrate that the coupling is conserved upon varying the temperature T. Notably, the observed opto-mechanical coupling is not limited to equilibrium conditions, but also holds for propagating pressure pulses. The non-equilibrium data show, that fluorescence is especially sensitive to dynamic changes in state such as the LE-LC phase transition. We conclude that variations in the thermodynamic state (here π and T, in general pH, membrane potential V, etc also) of lipid membranes are capable of controlling fluorescence intensity. Therefore, interfacial thermodynamic state diagrams of I should be obtained for a proper interpretation of intensity data.
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Affiliation(s)
- Shamit Shrivastava
- Department of Mechanical and Biomedical Engineering, Boston University, Boston, Massachusetts, United States of America
| | - Matthias F. Schneider
- Department of Mechanical and Biomedical Engineering, Boston University, Boston, Massachusetts, United States of America
- * E-mail:
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22
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Comparison between cucurbiturils and β-cyclodextrin interactions with cholesterol molecules present in Langmuir monolayers used as a biomembrane model. Colloids Surf B Biointerfaces 2013; 111:398-406. [PMID: 23856544 DOI: 10.1016/j.colsurfb.2013.05.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2012] [Revised: 05/04/2013] [Accepted: 05/06/2013] [Indexed: 11/20/2022]
Abstract
Specific surface techniques can probe the interaction of cholesterol (Chol) with substances that are able to host and/or sequester this biomolecule, provided that the additives are properly assembled at the interface. Reports on inclusion complexes of Chol with β-cyclodextrins exist in the literature. Here we compare the interaction of β-cyclodextrin and cucurbiturils with Chol present in Langmuir phospholipid (dipalmitoylphosphatidylcholine, DPPC) monolayers, used as a biomembrane model. Cucurbiturils, CB[n], comprise macrocyclic host molecules consisting of n glycoluril units. Classic surface pressure curves, dilatational surface viscoelasticity measurements, and fluorescence emission spectra and images obtained by time-resolved fluorescence of the corresponding Langmuir-Blodgett films have shown that homologues with 5 and 6 glycoluril units, CB[5] and CB[6], do not form inclusion complexes. Higher-order homologues, such as CB[7], are likely to complex with Chol with changes in the minimum molecular areas recorded for DPPC/Chol monolayers, the fluorescence decay lifetimes, and the dilatational surface viscosities of the monolayers generated in the presence of these molecules. Moreover, we proof the removal of cholesterol from the biomimetic interface in the presence of CB[7] by means of fluorescence spectra from the subphase support of monolayers containing fluorescent-labeled Chol.
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Yuan B, Ren J, Zhao M, Luo D, Gu L. Effects of limited enzymatic hydrolysis with pepsin and high-pressure homogenization on the functional properties of soybean protein isolate. Lebensm Wiss Technol 2012. [DOI: 10.1016/j.lwt.2011.12.001] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Iost RM, Crespilho FN. Layer-by-layer self-assembly and electrochemistry: Applications in biosensing and bioelectronics. Biosens Bioelectron 2012; 31:1-10. [DOI: 10.1016/j.bios.2011.10.040] [Citation(s) in RCA: 160] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2011] [Revised: 10/19/2011] [Accepted: 10/20/2011] [Indexed: 10/15/2022]
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Ravera S, Pepe IM, Calzia D, Morelli A, Panfoli I. Extremely low-frequency electromagnetic fields affect lipid-linked carbonic anhydrase. Electromagn Biol Med 2011; 30:67-73. [PMID: 21591890 DOI: 10.3109/15368378.2011.566770] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
In the last years, the effect of extremely low-frequency electromagnetic fields (ELF-EMF) on the activity of different enzymes were investigated. Only the membrane-anchored enzymes did decrease their activity, up to 50%. In this work, the effect of ELF-EMF on bovine lung membrane carbonic anhydrase (CA) were studied. Carbonic anhydrases are a family of 14 zinc-containing isozymes catalyzing the reversible reaction: CO(2)+H(2)O = HCO(3)(- )+H(+). CA differ in catalytic activity and subcellular localization. CA IV, IX, XII, XIV, and XV are membrane bound. In particular, CA IV, which is expressed in the lung, is glycosyl phosphatidyl inositol-linked to the membrane, therefore it was a candidate to inhibition by ELF-EMF. Exposure to the membranes to a field of 75 Hz frequency and different amplitudes caused CA activity to a reproducible decrease in enzymatic activity by 17% with a threshold of about 0.74 mT. The decrease in enzymatic activity was independent of the time of permanence in the field and was completely reversible. When the source of enzyme was solubilized with Triton, the field lost its effect on CA enzymatic activity, suggesting a crucial role of the membrane, as well as of the particular linkage of the enzyme to it, in determining the conditions for CA inactivation. Results are discussed in terms of the possible physiologic effects of CA inhibition in target organs.
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Affiliation(s)
- Silvia Ravera
- Department of Biology, University of Genoa, Genova, Italy.
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Bis (monoacylglycero) phosphate interfacial properties and lipolysis by pancreatic lipase-related protein 2, an enzyme present in THP-1 human monocytes. Biochim Biophys Acta Mol Cell Biol Lipids 2011; 1811:419-30. [DOI: 10.1016/j.bbalip.2011.04.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2010] [Revised: 04/12/2011] [Accepted: 04/18/2011] [Indexed: 02/04/2023]
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Monteiro DS, Nobre TM, Zaniquelli MED. Hyaluronidase Behavior at the Air/Liquid and Air/Lipid Interfaces and Improved Enzymatic Activity by Its Immobilization in a Biomembrane Model. J Phys Chem B 2011; 115:4801-9. [DOI: 10.1021/jp110795d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Douglas Santos Monteiro
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901 Ribeirão Preto, SP, Brazil
| | - Thatyane Morimoto Nobre
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901 Ribeirão Preto, SP, Brazil
| | - Maria Elisabete Darbello Zaniquelli
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901 Ribeirão Preto, SP, Brazil
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Gaĭnutdinov RV, Tolstikhina AL, Stepina ND, Novikova NN, Yur’eva EA, Khripunov AK. Atomic force microscopy study of the adsorption of protein molecules on transferred Langmuir monolayer. CRYSTALLOGR REP+ 2010. [DOI: 10.1134/s1063774510050251] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Langmuir films from human placental membranes: preparation, rheology, transfer to alkylated glasses, and sigmoidal kinetics of alkaline phosphatase in the resultant Langmuir-Blodgett film. Cell Biochem Biophys 2010; 56:91-107. [PMID: 20033626 DOI: 10.1007/s12013-009-9073-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In the present study, we studied the activity of human placental alkaline phosphatase (PLAP) constraint in a planar surface in controlled molecular packing conditions. For the first time, Langmuir films (LFs) were prepared by the spreading of purified placental membranes (PPM) on the air-water interface and their stability and rheological properties were studied. LFs exhibited a collapse pressure pi(C) = 48 mN/m, hysteresis during the compression-decompression cycle (C-D), indicating a plastic deformation, and a compressibility modulus (K) compatible with liquid-expanded phases. A phase transition point appeared at pi(T) = 28 mN/m and, following successive C-D, it moved toward lower surface areas and higher K, suggesting the lost of some non-PLAP proteins as components of vesicles that might protrude from the monolayer (confirmed by combining lipid/protein molar ratio analysis, PAGE-SDS and V(max)). LFs were transferred at 35 mN/m to alkylated glasses to obtain Langmuir-Blodgett films (LB(35)) the stability of which was confirmed by AFM. The kinetics of p-nitrophenyl phosphate (pNPP) hydrolysis at 37 degrees C catalyzed by PPM was Michaelian and exhibited the thermostability at 60 degrees C typical of PLAP. In LB(35), PLAP exhibited a sigmoidal kinetics which resembled the behavior of the partially metalated enzyme but might become from a cross-talk between protein and membrane structures.
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Goto TE, Lopez RF, Oliveira ON, Caseli L. Enzyme activity of catalase immobilized in Langmuir-Blodgett films of phospholipids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:11135-11139. [PMID: 20491464 DOI: 10.1021/la101648x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A major challenge for producing low cost biosensors based on nanostructured films with control of molecular architectures is to preserve the catalytic activity of the immobilized biomolecules. In this study, we show that catalase (HRP) keeps its activity if immobilized in Langmuir-Blodgett (LB) films of dipalmitoyl phosphatidylglycerol (DPPG). The incorporation of catalase into a DPPG monolayer at the air-water interface was demonstrated with surface pressure and surface potential isotherms, in addition to polarization-modulated infrared reflection absorption spectroscopy (PM-IRRAS). According to the PM-IRRAS data, catalase was not denatured upon adsorption on a preformed DPPG monolayer and could be transferred onto a solid substrate. The catalytic activity of catalase in a mixed LB film with DPPG was ca. 13% higher than in solution. The control of molecular architecture and choice of a suitable phospholipid matrix allows catalase-containing LB films to be used in sensing hydrogen peroxide.
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Affiliation(s)
- Thiago E Goto
- Laboratório de Materiais Híbridos, Departamento de Ciências Exatas e da Terra, Universidade Federal de São Paulo, Diadema, SP, Brazil
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Montanha E, Pavinatto F, Caseli L, Kaczmarek O, Liebscher J, Huster D, Oliveira O. Properties of lipophilic nucleoside monolayers at the air–water interface. Colloids Surf B Biointerfaces 2010; 77:161-5. [DOI: 10.1016/j.colsurfb.2010.01.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2010] [Revised: 01/22/2010] [Accepted: 01/25/2010] [Indexed: 11/25/2022]
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Miao S, Leeman H, De Feyter S, Schoonheydt R. Three-Component Langmuir-Blodgett Films Consisting of Surfactant, Clay Mineral, and Lysozyme: Construction and Characterization. Chemistry 2010; 16:2461-9. [DOI: 10.1002/chem.200900584] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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33
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Siqueira JR, Caseli L, Crespilho FN, Zucolotto V, Oliveira ON. Immobilization of biomolecules on nanostructured films for biosensing. Biosens Bioelectron 2010; 25:1254-63. [DOI: 10.1016/j.bios.2009.09.043] [Citation(s) in RCA: 142] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2009] [Revised: 09/14/2009] [Accepted: 09/30/2009] [Indexed: 01/18/2023]
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34
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Ravera S, Bianco B, Cugnoli C, Panfoli I, Calzia D, Morelli A, Pepe IM. Sinusoidal ELF magnetic fields affect acetylcholinesterase activity in cerebellum synaptosomal membranes. Bioelectromagnetics 2009; 31:270-6. [DOI: 10.1002/bem.20563] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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35
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Narayanan R, Stottrup BL, Wang P. Surface packing characterization of Langmuir monolayer-anchored enzyme. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:10660-10665. [PMID: 19735135 DOI: 10.1021/la901076j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We have synthesized a novel interface-anchoring alcohol dehydrogenase by covalent attachment of a hydrophobic polymer tail to the hydrophilic protein head. Analogous to a protein-based surfactant, this polymer-enzyme conjugate self-assembled at liquid-liquid or liquid-air interfaces to form a membrane similar to other surfactant monolayers. The packing and morphology of the interface-anchored enzymes play an important role in regulating the membrane behaviors including enzyme mobility and interfacial interactions of enzymes with reactant and product molecules. To characterize the surface assembly morphology of the interface-anchored enzymes, Langmuir film balance and fluorescence microscopy techniques were used. The Langmuir isotherm of the interface-anchored enzyme demonstrated a pronounced molecular rearrangement upon compression of the isotherm. This corresponded to changes in membrane morphology and state observed using fluorescence microscopy. The molecular diffusion within the novel interface-anchored enzymes was further evaluated by using a fluorescence recovery after photobleaching technique. We report a diffusion coefficient of 6.7x10(-10) cm2/s. The study represents the first in-depth analysis of surface packing and interfacial mobility of such interface-anchored enzymes.
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Affiliation(s)
- Ravindrabharathi Narayanan
- Department of Bioproducts and Biosystems Engineering and Biotechnology Institute, The University of Minnesota, St. Paul, Minnesota 55108, USA
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36
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Nobre TM, de Sousa e Silva H, Furriel RPM, Leone FA, Miranda PB, Zaniquelli MED. Molecular view of the interaction between iota-carrageenan and a phospholipid film and its role in enzyme immobilization. J Phys Chem B 2009; 113:7491-7. [PMID: 19415915 DOI: 10.1021/jp900841p] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Proteins incorporated into phospholipid Langmuir-Blodgett (LB) films are a good model system for biomembranes and enzyme immobilization studies. The specific fluidity of biomembranes, an important requisite for enzymatic activity, is naturally controlled by varying phospholipid compositions. In a model system, instead, LB film fluidity may be varied by covering the top layer with different substances able to interact simultaneously with the phospholipid and the protein to be immobilized. In this study, we immobilized a carbohydrate rich Neurospora crassa alkaline phosphatase (NCAP) in monolayers of the sodium salt of dihexadecylphosphoric acid (DHP), a synthetic phospholipid that provides very condensed Langmuir films. The binding of NCAP to DHP Langmuir-Blodgett (LB) films was mediated by the anionic polysaccharide iota-carrageenan (iota-car). Combining results from surface isotherms and the quartz crystal microbalance technique, we concluded that the polysaccharide was essential to promote the interaction between DHP and NCAP and also to increase the fluidity of the film. An estimate of DHP:iota-car ratio within the film also revealed that the polysaccharide binds to DHP LB film in an extended conformation. Furthermore, the investigation of the polysaccharide conformation at molecular level, using sum-frequency vibrational spectroscopy (SFG), indicated a preferential conformation of the carrageenan molecules with the sulfate groups oriented toward the phospholipid monolayer, and both the hydroxyl and ether groups interacting preferentially with the protein. These results demonstrate how interfacial electric fields can reorient and induce conformational changes in macromolecules, which may significantly affect intermolecular interactions at interfaces. This detailed knowledge of the interaction mechanism between the enzyme and the LB film is relevant to design strategies for enzyme immobilization when orientation and fluidity properties of the film provided by the matrix are important to improve enzymatic activity.
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Affiliation(s)
- Thatyane M Nobre
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901 Ribeirao Preto, SP, Brazil
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37
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Colhone MC, Nobre TM, Zaniquelli MED, Stabeli RG, Ciancaglini P. Incorporation of antigenic GPI-proteins from Leishmania amazonensis to membrane mimetic systems: Influence of DPPC/cholesterol ratio. J Colloid Interface Sci 2009; 333:373-9. [DOI: 10.1016/j.jcis.2009.01.043] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2008] [Revised: 01/16/2009] [Accepted: 01/16/2009] [Indexed: 10/21/2022]
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38
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Enhanced activity of horseradish peroxidase in Langmuir–Blodgett films of phospholipids. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2008; 1778:2291-7. [DOI: 10.1016/j.bbamem.2008.05.012] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2008] [Revised: 05/25/2008] [Accepted: 05/28/2008] [Indexed: 11/23/2022]
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39
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Using phospholipid Langmuir and Langmuir–Blodgett films as matrix for urease immobilization. J Colloid Interface Sci 2008; 319:100-8. [DOI: 10.1016/j.jcis.2007.12.007] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2007] [Revised: 12/06/2007] [Accepted: 12/06/2007] [Indexed: 11/18/2022]
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40
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Caseli L, Masui DC, Furriel RPM, Leone FA, Zaniquelli MED, Orbulescu J, Leblanc RM. Rat osseous plate alkaline phosphatase as Langmuir monolayer--an infrared study at the air-water interface. J Colloid Interface Sci 2008; 320:476-82. [PMID: 18280491 DOI: 10.1016/j.jcis.2008.01.043] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2007] [Revised: 01/25/2008] [Accepted: 01/26/2008] [Indexed: 11/16/2022]
Abstract
A glycosylphosphatidylinositol (GPI)-anchored enzyme (rat osseous plate alkaline phosphatase-OAP) was studied as monolayer (pure and mixed with lipids) at the air-water interface. Surface pressure and surface potential-area isotherms showed that the enzyme forms a stable monolayer and exhibits a liquid-expanded state even at surface pressure as high as 30 mN m(-1). Isotherms for mixed dimyristoylphosphatidic acid (DMPA)-OAP monolayer showed the absence of a liquid-expanded/liquid-condensed phase transition as observed for pure DMPA monolayer. In both cases, pure or mixed monolayer, the enzyme preserves its native conformation under compression at the air-water interface as observed from in situ p-polarized light Fourier transform-infrared reflection-absorption spectroscopic (FT-IRRAS) measurements. Changes in orientation and conformation of the enzyme due to the presence or absence of DMPA, as well as due to the surface compression, are discussed.
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Affiliation(s)
- Luciano Caseli
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil 14040-901.
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41
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Maggio B, Borioli GA, Del Boca M, De Tullio L, Fanani ML, Oliveira RG, Rosetti CM, Wilke N. Composition-driven surface domain structuring mediated by sphingolipids and membrane-active proteins. Above the nano- but under the micro-scale: mesoscopic biochemical/structural cross-talk in biomembranes. Cell Biochem Biophys 2007; 50:79-109. [PMID: 17968678 DOI: 10.1007/s12013-007-9004-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/28/2007] [Indexed: 10/22/2022]
Abstract
Biomembranes contain a wide variety of lipids and proteins within an essentially two-dimensional structure. The coexistence of such a large number of molecular species causes local tensions that frequently relax into a phase or compositional immiscibility along the lateral and transverse planes of the interface. As a consequence, a substantial microheterogeneity of the surface topography develops and that depends not only on the lipid-protein composition, but also on the lateral and transverse tensions generated as a consequence of molecular interactions. The presence of proteins, and immiscibility among lipids, constitute major perturbing factors for the membrane sculpturing both in terms of its surface topography and dynamics. In this work, we will summarize some recent evidences for the involvement of membrane-associated, both extrinsic and amphitropic, proteins as well as membrane-active phosphohydrolytic enzymes and sphingolipids in driving lateral segregation of phase domains thus determining long-range surface topography.
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Affiliation(s)
- Bruno Maggio
- Departamento de Química Biológica, Facultad de Ciencias Químicas, Centro de Investigaciones en Química Biológica de Córdoba, Universidad Nacional de Córdoba - CONICET, Argentina.
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Ravera S, Falugi C, Calzia D, Pepe IM, Panfoli I, Morelli A. First Cell Cycles of Sea Urchin Paracentrotus lividus Are Dramatically Impaired by Exposure to Extremely Low-Frequency Electromagnetic Field. Biol Reprod 2006; 75:948-53. [PMID: 16957026 DOI: 10.1095/biolreprod.106.051227] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Exposure of fertilized eggs of the sea urchin Paracentrotus lividus to an electromagnetic field of 75-Hz frequency and low amplitudes (from 0.75 to 2.20 mT of magnetic component) leads to a dramatic loss of synchronization of the first cell cycle, with formation of anomalous embryos linked to irregular separation of chromatids during the mitotic events. Because acetylcholinesterase (ACHE) is thought to regulate the embryonic first developmental events of the sea urchin, its enzymatic activity was assayed in embryo homogenates and decreased by 48% when the homogenates were exposed to the same pulsed field. This enzymatic inactivation had a threshold of about 0.75 +/- 0.01 mT. The same field threshold was found for the effect on the formation of anomalous embryos of P. lividus. Moreover, ACHE inhibitors seem to induce the same teratological effects as those caused by the field, while blockers of acetylcholine (ACh) receptors are able to antagonize those effects. We conclude that one of the main causes of these dramatic effects on the early development of the sea urchin by field exposure could be the accumulation of ACh due to ACHE inactivation. The crucial role of the membrane in determining the conditions for enzyme inactivation is discussed.
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Affiliation(s)
- Silvia Ravera
- Department of Biology, University of Genoa, 16132 Genova, Italy
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43
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Pancera SM, Gliemann H, Schimmel T, Petri DFS. Adsorption behavior and activity of hexokinase. J Colloid Interface Sci 2006; 302:417-23. [PMID: 16876812 DOI: 10.1016/j.jcis.2006.06.066] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2006] [Revised: 06/09/2006] [Accepted: 06/29/2006] [Indexed: 11/25/2022]
Abstract
The study on the adsorption of hexokinase (HK) onto silicon wafers was carried out by means of in situ ellipsometry and atomic force microscopy in the liquid. The thickness values of the adsorbed HK layer determined by both techniques were in excellent agreement and evidenced HK monolayer formation. The adsorption of HK onto Si wafers was favored at low ionic strength, indicating that the adsorption is mainly driven by electrostatic forces, since salt screens not only the segment-segment repulsion but also the segment-surface attraction when the salt concentration increases. The enzymatic activity of free HK and of adsorbed HK was measured as a function of time. Free HK in solution lost activity upon storage. Contrarily, adsorbed HK kept its activity level even after 48 h storage at room temperature. This outstanding behavior was attributed to specific orientation of the HK active site to the solution.
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Affiliation(s)
- S M Pancera
- Institut für Nanotechnologie, Forschungszentrum Karlsruhe GmbH, D-76021 Karlsruhe, Germany
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Caseli L, Moraes ML, Zucolotto V, Ferreira M, Nobre TM, Zaniquelli MED, Rodrigues Filho UP, Oliveira ON. Fabrication of phytic acid sensor based on mixed phytase-lipid Langmuir-Blodgett films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:8501-8. [PMID: 16981769 DOI: 10.1021/la061799g] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
This paper reports the surface activity of phytase at the air-water interface, its interaction with lipid monolayers, and the construction of a new phytic acid biosensor on the basis of the Langmuir-Blodgett (LB) technique. Phytase was inserted in the subphase solution of dipalmitoylphosphatidylglycerol (DPPG) Langmuir monolayers, and its incorporation to the air-water interface was monitored with surface pressure measurements. Phytase was able to incorporate into DPPG monolayers even at high surface pressures, ca. 30 mN/m, under controlled ionic strength, pH, and temperature. Mixed Langmuir monolayers of phytase and DPPG were characterized by surface pressure-area and surface potential-area isotherms, and the presence of the enzyme provided an expansion in the monolayers (when compared to the pure lipid at the interface). The enzyme incorporation also led to significant changes in the equilibrium surface compressibility (in-plane elasticity), especially in liquid-expanded and liquid-condensed regions. The dynamic surface elasticity for phytase-containing interfaces was investigated using harmonic oscillation and axisymmetric drop shape analysis. The insertion of the enzyme at DPPG monolayers caused an increase in the dynamic surface elasticity at 30 mN m(-)(1), indicating a strong interaction between the enzyme and lipid molecules at a high-surface packing. Langmuir-Blodgett (LB) films containing 35 layers of mixed phytase-DPPG were characterized by ultraviolet-visible and fluorescence spectroscopy and crystal quartz microbalance nanogravimetry. The ability in detecting phytic acid was studied with voltammetric measurements.
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Affiliation(s)
- Luciano Caseli
- Grupo de Polímeros, Instituto Física de São Carlos, Universidade de São Paulo (IFSC-USP), São Carlos, SP, Brazil.
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Ronzon F, Rieu JP, Chauvet JP, Roux B. A thermodynamic study of GPI-anchored and soluble form of alkaline phosphatase films at the air-water interface. J Colloid Interface Sci 2006; 301:493-502. [PMID: 16793053 DOI: 10.1016/j.jcis.2006.05.055] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2006] [Revised: 05/23/2006] [Accepted: 05/25/2006] [Indexed: 11/29/2022]
Abstract
Glycosylphosphatidyl inositol (GPI) anchored proteins are localized and clustered on the outer layer of the plasma membranes forming microdomains. Among them, mammalian alkaline phosphatases (AP-GPI) are widely distributed enzymes. They can also exist as soluble proteins without anchor (APs). Using the Langmuir film technique, we study the thermodynamic properties of monolayers for both protein forms at the air-buffer interface. The enzymatic activity is maintained at the interface but the adsorption of the two forms of AP is very different. AP-GPI presents a higher surface activity and a larger molecular area than the soluble form. The molecular area deduced for high surface pressures suggests a different organization of the monolayers for these two forms. APs molecules seem to adsorb as a multilayer at the interface while AP-GPI appear to be orientated with the major axis parallel to the interface. This orientation allows the accessibility of AP-GPI enzymatic sites that are turned in direction of the subphase as in vivo where the active sites must be turned outside of the membrane.
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Affiliation(s)
- Frédéric Ronzon
- Laboratoire de Physico-Chimie Biologique, UMR 5013, Université Claude Bernard Lyon I, 43 boulevard du 11 Novembre 1918, 69622 Villeurbanne cedex, France.
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Caseli L, Masui DC, Furriel RPM, Leone FA, Zaniquelli MED. Incorporation conditions guiding the aggregation of a glycosylphosphatidyl inositol (GPI)-anchored protein in Langmuir monolayers. Colloids Surf B Biointerfaces 2005; 46:248-54. [PMID: 16356698 DOI: 10.1016/j.colsurfb.2005.11.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2005] [Revised: 10/17/2005] [Accepted: 11/08/2005] [Indexed: 11/28/2022]
Abstract
This work investigates the process of incorporation of a glycosylphosphatidyl inositol (GPI)-anchored alkaline phosphatase into Langmuir monolayers of dimyristoyl phosphatidic acid (DMPA). Three different methods of protein incorporation were assayed. When the protein solution was injected below the air-water interface after formation of the lipid monolayer a micro-heterogeneous distribution of alkaline phosphatase throughout the interface was observed. Adsorption kinetics studied by fluorescence microscopy, associated with surface pressure measurements, led to the proposition of a model in which the protein penetration is modulated by the surface packing of the monolayer and intermolecular interactions occurring between the phospholipid and the protein. At initial surface pressures higher than 20 m Nm(-1), the protein is quickly adsorbed on the interface and the lateral diffusion drives the alkyl chains to turn towards the air phase while the polypeptide moiety faces the aqueous subphase.
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Affiliation(s)
- Luciano Caseli
- Departamento de Química, Faculdade de Filosofia Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
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Maggio B, Rosetti CM, Borioli GA, Fanani ML, Del Boca M. Protein-mediated surface structuring in biomembranes. Braz J Med Biol Res 2005; 38:1735-48. [PMID: 16302088 DOI: 10.1590/s0100-879x2005001200002] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The lipids and proteins of biomembranes exhibit highly dissimilar conformations, geometrical shapes, amphipathicity, and thermodynamic properties which constrain their two-dimensional molecular packing, electrostatics, and interaction preferences. This causes inevitable development of large local tensions that frequently relax into phase or compositional immiscibility along lateral and transverse planes of the membrane. On the other hand, these effects constitute the very codes that mediate molecular and structural changes determining and controlling the possibilities for enzymatic activity, apposition and recombination in biomembranes. The presence of proteins constitutes a major perturbing factor for the membrane sculpturing both in terms of its surface topography and dynamics. We will focus on some results from our group within this context and summarize some recent evidence for the active involvement of extrinsic (myelin basic protein), integral (Folch-Lees proteolipid protein) and amphitropic (c-Fos and c-Jun) proteins, as well as a membrane-active amphitropic phosphohydrolytic enzyme (neutral sphingomyelinase), in the process of lateral segregation and dynamics of phase domains, sculpturing of the surface topography, and the bi-directional modulation of the membrane biochemical reactivity.
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Affiliation(s)
- B Maggio
- Departamento de Química Biológica, CIQUIBIC, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, 5000 Córdoba, Argentina.
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48
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Morelli A, Ravera S, Panfoli I, Pepe IM. Effects of extremely low frequency electromagnetic fields on membrane-associated enzymes. Arch Biochem Biophys 2005; 441:191-8. [PMID: 16126157 DOI: 10.1016/j.abb.2005.07.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2005] [Accepted: 07/23/2005] [Indexed: 10/25/2022]
Abstract
The effects of extremely low frequency electromagnetic fields of 75 Hz were studied on different membrane-associated enzymes. Only the activities of three enzymes out of seven exposed to the field decreased approximately of about 54-61% with field amplitudes above a threshold of 73-151 microT depending on the enzyme. The same field had no effect on the activities of either integral membrane enzymes such as Ca,ATPase, Na/K,ATPase, and succinic dehydrogenase or peripheral membrane enzymes such as photoreceptor PDE. The decrease in enzymatic activity of the field-sensitive enzymes was independent of the time of permanence in the field and was completely reversible. When these enzymes were solubilized with Triton, no effect of the field was obtained on the enzymatic activity, suggesting the crucial role of the membrane in determining the conditions for enzyme inactivation. The role of the particular linkage of the field-sensitive enzymes to the membranes is also discussed.
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Affiliation(s)
- A Morelli
- Department of DIBISAA, University of Genoa, viale Benedetto XV, 3 Genova 16131, Italy
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