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Sturm M, Gutowski O, Brezesinski G. The Effect of pH on the Structure and Lateral Organization of Cardiolipin in Langmuir Monolayers. Chemphyschem 2022; 23:e202200218. [PMID: 35920819 DOI: 10.1002/cphc.202200218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 06/17/2022] [Indexed: 01/07/2023]
Abstract
Cardiolipin (CL) is a unique phospholipid featuring a dimeric structure. With its four alkyl chains, it has a large hydrophobic region and the charged hydrophilic head group is relatively small. Biological membranes exhibit CL exclusively in the inner bacterial and mitochondrial membranes. Alteration of CL packing can lead to structural changes and membrane instabilities. One environmental influence is the change in pH. Since the acidic properties of the phosphate head groups remain still controversial in literature, this work focusses on the influence of pH on the ionization degree of CL. For the analyses, surface pressure (π) - molecular area (A) isotherm experiments were combined with total reflection X-ray fluorescence (TRXF) and grazing incidence X-ray diffraction (GIXD). Continuous ionization with a high CL packing density was observed in the monolayer over a wide pH range. No individual pKa values can be assigned to the two phosphate groups, but mutual influence is observed.
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Affiliation(s)
- Marina Sturm
- Photon Science, Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607, Hamburg, Germany
| | - Olof Gutowski
- Photon Science, Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607, Hamburg, Germany
| | - Gerald Brezesinski
- Institute of Applied Dermatopharmacy, Martin Luther University Halle-Wittenberg, Weinbergweg 23, 06120, Halle (Saale), Germany
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Brezesinski G, Calow ADJ, Pereira CL, Seeberger PH. Thermodynamic and Structural Behavior of α-Galactosylceramide and C6-Functionalized α-GalCer in 2D Layers at the Air-Liquid Interface. Chembiochem 2020; 21:241-247. [PMID: 31544285 PMCID: PMC7004034 DOI: 10.1002/cbic.201900491] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Indexed: 12/12/2022]
Abstract
α-Galactosylceramide (α-GalCer; KRN7000) is a ligand for the glycoprotein CD1d that presents lipid antigens to natural killer T cells. Therefore, KRN7000 as well as some modified versions thereof have been widely investigated as part of novel immunotherapies. To examine the impact of structural modification, we investigated KRN7000 and C6-modified KRN7000 at the air-liquid interface using monolayer isotherms, BAM, IRRAS, GIXD, and TRXF. The amino group has no influence on the highly ordered sub-gel structures found at lateral pressures relevant for biological membranes. Neither lateral compression nor the protonation state of the amino group has a measurable effect on the lattice structure, which is defined by strong and rigid intermolecular hydrogen bonds. However, the first-order phase transition found for the C6-functionalized α-GalCer is connected with an extraordinary surface-inhibited nucleation. Our study demonstrates that KRN7000 can be functionalized at C6 without significantly changing the structural properties.
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Affiliation(s)
- Gerald Brezesinski
- Max Planck Institute of Colloids and InterfacesBiomolecular Systems DepartmentAm Mühlenberg 114476PotsdamGermany
| | - Adam D. J. Calow
- Max Planck Institute of Colloids and InterfacesBiomolecular Systems DepartmentAm Mühlenberg 114476PotsdamGermany
| | - Claney L. Pereira
- Max Planck Institute of Colloids and InterfacesBiomolecular Systems DepartmentAm Mühlenberg 114476PotsdamGermany
| | - Peter H. Seeberger
- Max Planck Institute of Colloids and InterfacesBiomolecular Systems DepartmentAm Mühlenberg 114476PotsdamGermany
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Sturm M, Gutowski O, Brezesinski G. The Influence of Calcium Traces in Ultrapure Water on the Lateral Organization in Tetramyristoyl Cardiolipin Monolayers. Chemphyschem 2019; 20:1521-1526. [DOI: 10.1002/cphc.201900126] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 03/13/2019] [Indexed: 01/01/2023]
Affiliation(s)
- Marina Sturm
- Institute of PhysicsUniversity of Greifswald Felix-Hausdorff-Str. 6 17489 Greifswald Germany
- Biomolecular SystemsMax Planck Institute of Colloids and Interfaces Science Park Potsdam-Golm Am Mühlenberg 1 14476 Potsdam Germany
| | - Olof Gutowski
- Photon ScienceDeutsches Elektronen-Synchrotron DESY Notkestr. 85 22607 Hamburg Germany
| | - Gerald Brezesinski
- Biomolecular SystemsMax Planck Institute of Colloids and Interfaces Science Park Potsdam-Golm Am Mühlenberg 1 14476 Potsdam Germany
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Oliveira RG, Schneck E, Quinn BE, Konovalov OV, Brandenburg K, Gutsmann T, Gill T, Hanna CB, Pink DA, Tanaka M. Crucial roles of charged saccharide moieties in survival of gram negative bacteria against protamine revealed by combination of grazing incidence x-ray structural characterizations and Monte Carlo simulations. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2010; 81:041901. [PMID: 20481747 DOI: 10.1103/physreve.81.041901] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2009] [Revised: 12/09/2009] [Indexed: 05/29/2023]
Abstract
Grazing incidence x-ray scattering techniques and Monte Carlo (MC) simulations are combined to reveal the influence of molecular structure (genetic mutation) and divalent cations on the survival of gram negative bacteria against cationic peptides such as protamine. The former yields detailed structures of bacterial lipopolysaccharide (LPS) membranes with minimized radiation damages, while the minimal computer model based on the linearized Poisson-Boltzmann theory allows for the simulation of conformational changes of macromolecules (LPSs and peptides) that occur in the time scale of ms. The complementary combination of the structural characterizations and MC simulation demonstrates that the condensations of divalent ions (Ca2+ or Mg2+) in the negatively charged core saccharides are crucial for bacterial survival.
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Affiliation(s)
- Rafael G Oliveira
- Biophysics Laboratory E22, Technical University Munich, D85748 Garching, Germany
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Vollhardt D, Fainerman VB. Characterisation of phase transition in adsorbed monolayers at the air/water interface. Adv Colloid Interface Sci 2010; 154:1-19. [PMID: 20153454 DOI: 10.1016/j.cis.2010.01.003] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2009] [Revised: 01/07/2010] [Accepted: 01/09/2010] [Indexed: 11/16/2022]
Abstract
Recent work has provided experimental and theoretical evidence that a first order fluid/condensed (LE/LC) phase transition can occur in adsorbed monolayers of amphiphiles and surfactants which are dissolved in aqueous solution. Similar to Langmuir monolayers, also in the case of adsorbed monolayers, the existence of a G/LE phase transition, as assumed by several authors, is a matter of question. Representative studies, at first performed with a tailored amphiphile and later with numerous other amphiphiles, also with n-dodecanol, provide insight into the main characteristics of the adsorbed monolayer during the adsorption kinetics. The general conditions necessary for the formation of a two-phase coexistence in adsorbed monolayers can be optimally studied using dynamic surface pressure measurements, Brewster angle microscopy (BAM) and synchrotron X-ray diffraction at grazing incidence (GIXD). A characteristic break point in the time dependence of the adsorption kinetics curves indicates the phase transition which is largely affected by the concentration of the amphiphile in the aqueous solution and on the temperature. Formation and growth of condensed phase domains after the phase transition point are visualised by BAM. As demonstrated by a tailored amphiphile, various types of morphological textures of the condensed phase can occur in different temperature regions. Lattice structure and tilt angle of the alkyl chains in the condensed phase of the adsorbed monolayer are determined using GIXD. The main growth directions of the condensed phase textures are correlated with the two-dimensional lattice structure. The results, obtained for the characteristics of the condensed phase after a first order main transition, are supported by experimental bridging to the Langmuir monolayers. Phase transition of adsorbing trace impurities in model surfactants can strongly affect the characteristics of the main component. Dodecanol present as minor component in aqueous sodium dodecylsulfate solution dominate largely the fundamental features of the adsorbed monolayer of the mixed dodecanol/SDS solutions at adsorption equilibrium. A theoretical concept on the basis of the quasi-chemical model and assumption of the entropy non-ideality has been developed which can well describe the experimental results of the diffusion kinetics of surfactant adsorption from solutions. The model regards the phase behaviour of adsorbed monolayers on the basis of the experimental results explicitly supported by the first order fluid/condensed phase transition and theoretical models assuming bimodal distribution between large aggregates (domains) and monomers and/or very small aggregates. Another simple theoretical model for the description of the coadsorption of surfactant mixtures, based on the additivity of the contributions brought by the solution components into the surface pressure is shown to be in qualitative agreement with the experimental data of mixed dodecanol/SDS solutions. The theoretical results corroborate the fact that the formed condensed phase (large aggregates) in the mixed monolayer consists mainly of dodecanol.
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Affiliation(s)
- D Vollhardt
- Max Planck Institute of Colloids and Interfaces, D-14424 Potsdam/Golm, Germany.
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Wolf SE, Loges N, Mathiasch B, Panthöfer M, Mey I, Janshoff A, Tremel W. Phase Selection of Calcium Carbonate through the Chirality of Adsorbed Amino Acids. Angew Chem Int Ed Engl 2007; 46:5618-23. [PMID: 17583884 DOI: 10.1002/anie.200700010] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Stephan E Wolf
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, 55099 Mainz, Germany
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Wolf S, Loges N, Mathiasch B, Panthöfer M, Mey I, Janshoff A, Tremel W. Phasenselektion von Calciumcarbonat durch die Chiralität adsorbierter Aminosäuren. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200700010] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Balz M, Therese HA, Kappl M, Nasdala L, Hofmeister W, Butt HJ, Tremel W. Morphosynthesis of strontianite nanowires using polyacrylate templates tethered onto self-assembled monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2005; 21:3981-3986. [PMID: 15835964 DOI: 10.1021/la047712d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Strontianite nanowires have been synthesized on self-assembled monolayers (SAM) in the presence of polyacrylate templates. The morphology of this product exhibits characteristic differences from that of products obtained in the absence of polyacrylate. It is demonstrated that the template-induced crystallization process involves the interaction between the SAM surface, polyacrylate (a dissolved polyelectrolyte), and the cations/anions in solution. By the combination of these components, hierarchically ordered mineral hybrid structures are formed.
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Affiliation(s)
- Mathias Balz
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, D-55099 Mainz, Germany
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Aroti A, Leontidis E, Maltseva E, Brezesinski G. Effects of Hofmeister Anions on DPPC Langmuir Monolayers at the Air−Water Interface. J Phys Chem B 2004. [DOI: 10.1021/jp0481512] [Citation(s) in RCA: 138] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- A. Aroti
- Department of Chemistry, University of Cyprus, Nicosia 1678, Cyprus and Max Planck Institute of Colloids and Interfaces, Potsdam 14424, Germany
| | - E. Leontidis
- Department of Chemistry, University of Cyprus, Nicosia 1678, Cyprus and Max Planck Institute of Colloids and Interfaces, Potsdam 14424, Germany
| | - E. Maltseva
- Department of Chemistry, University of Cyprus, Nicosia 1678, Cyprus and Max Planck Institute of Colloids and Interfaces, Potsdam 14424, Germany
| | - G. Brezesinski
- Department of Chemistry, University of Cyprus, Nicosia 1678, Cyprus and Max Planck Institute of Colloids and Interfaces, Potsdam 14424, Germany
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Tanaka M, Schneider MF, Brezesinski G. In-Plane Structures of Synthetic Oligolactose Lipid Monolayers-Impact of Saccharide Chain Length. Chemphyschem 2003; 4:1316-22. [PMID: 14714379 DOI: 10.1002/cphc.200300791] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Grazing incidence X-ray diffraction (GIXD) was used to investigate the in-plane structure of monolayers of synthetic glycolipids with oligolactose head groups (Lac N, with N = number of lactose units) at the air/water interface. The Lac 1 monolayer exhibits three sharp diffraction peaks. One peak can be deconvoluted into two diffraction peaks, which suggests that alkyl chains in the monolayer form an orthorhombic lattice. On the other hand, the other two peaks are related to bulk crystalline materials residing at the interface. Another weak peak from the head group correlation, either in a monolayer or in bulk crystals, can also be observed in some experiments. The scattering patterns of the Lac 2 monolayer indicate that the alkyl chains order in an orthorhombic lattice, where a shift in the hydrophilic/hydrophobic balance seems to fluidize the film. Alkyl chains in the Lac 3 monolayer also seem to assume an orthorhombic lattice; however, a weak diffraction peak from the correlation between trilactose head groups can also be observed. The estimated lattice dimensions are compared systematically to those of bulk dispersions, as well as to the viscoelastic properties of the monolayer. The obtained results strongly suggest that the in-plane structure of synthetic glycolipid monolayers can provide a well-defined basis to understand the impact of the chemical structure on the cooperativity and function of the glycocalix of cellular surfaces.
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Affiliation(s)
- Motomu Tanaka
- Lehrstuhl für Biophysik E22, Technische Universität München, James-Franck-Strasse 1, 85747 Garching, Germany.
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Struth B, Rieutord F, Konovalov O, Brezesinski G, Grübel G, Terech P. Organization of two-dimensional phospholipid monolayers on a gel-forming substrate. PHYSICAL REVIEW LETTERS 2002; 88:025502. [PMID: 11801023 DOI: 10.1103/physrevlett.88.025502] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2001] [Indexed: 05/23/2023]
Abstract
The formation and structural evolution of two-dimensional amphiphilic monolayers on a liquid mineral sol undergoing a sol-gel transition have been studied by surface x-ray scattering techniques. The gelation process is accompanied by the formation of a single layer of mineral particles beneath the surface, inducing a reorganization of the lipidic monolayers.
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Affiliation(s)
- Bernd Struth
- European Synchrotron Radiation Facility, BP 220, 38043 Grenoble Cédex, France
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Förster G, Meister A, Blume A. Chain packing modes in crystalline surfactant and lipid bilayers. Curr Opin Colloid Interface Sci 2001. [DOI: 10.1016/s1359-0294(01)00091-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Zhao J, Vollhardt D, Wu J, Miller R, Siegel S, Li J. Effect of dodecyl dimethyl phosphine oxide penetration into phospholipid monolayers: morphology and dynamics. Colloids Surf A Physicochem Eng Asp 2000. [DOI: 10.1016/s0927-7757(99)00496-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Vollhardt D, Gutberlet T. Brewster angle microscopy study of supersaturated monolayers of long chain fatty acid methyl esters before and beyond the collapse pressure. Colloids Surf A Physicochem Eng Asp 1995. [DOI: 10.1016/0927-7757(95)03193-h] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Brezesinski G, Dietrich A, Struth B, Böhm C, Bouwman WG, Kjaer K, Möhwald H. Influence of ether linkages on the structure of double-chain phospholipid monolayers. Chem Phys Lipids 1995. [DOI: 10.1016/0009-3084(95)02439-p] [Citation(s) in RCA: 132] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Majewski J, Edgar R, Popovitz-Biro R, Kjaer K, Bouwman WG, Als-Nielsen J, Lahav M, Leiserowitz L. Strukturbestimmung im Grenzbereich zwischen Monoschichten und dreidimensionalen Kristallen; eine Untersuchung nanokristalliner Aggregate von α,ω-Docosandiol an der Grenzfläche Wasser-Luft mit Röntgenbeugung unter streifendem Einfall. Angew Chem Int Ed Engl 1995. [DOI: 10.1002/ange.19951070609] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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