1
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Amărandi RM, Neamṭu A, Ştiufiuc RI, Marin L, Drăgoi B. Impact of Lipid Composition on Vesicle Protein Adsorption: A BSA Case Study. ACS OMEGA 2024; 9:17903-17918. [PMID: 38680315 PMCID: PMC11044229 DOI: 10.1021/acsomega.3c09131] [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: 11/16/2023] [Revised: 03/04/2024] [Accepted: 03/07/2024] [Indexed: 05/01/2024]
Abstract
Investigating the interaction between liposomes and proteins is of paramount importance in the development of liposomal formulations with real potential for bench-to-bedside transfer. Upon entering the body, proteins are immediately adsorbed on the liposomal surface, changing the nanovehicles' biological identity, which has a significant impact on their biodistribution and pharmacokinetics and ultimately on their therapeutic effect. Albumin is the most abundant plasma protein and thus usually adsorbs immediately on the liposomal surface. We herein report a comprehensive investigation on the adsorption of model protein bovine serum albumin (BSA) onto liposomal vesicles containing the zwitterionic lipid 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC), in combination with either cholesterol (CHOL) or the cationic lipid 1,2-dioleoyl-3-trimethylammoniumpropane (DOTAP). While many studies regarding protein adsorption on the surface of liposomes with different compositions have been performed, to the best of our knowledge, the differential responses of CHOL and DOTAP upon albumin adsorption on vesicles have not yet been investigated. UV-vis spectroscopy and sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) revealed a strong influence of the phospholipid membrane composition on protein adsorption. Hence, it was found that DOTAP-containing vesicles adsorb proteins more robustly but also aggregate in the presence of BSA, as confirmed by DLS and TEM. Separation of liposome-protein complexes from unadsorbed proteins performed by means of centrifugation and size exclusion chromatography (SEC) was also investigated. Our results show that neither method can be regarded as a golden experimental setup to study the protein corona of liposomes. Yet, SEC proved to be more successful in the separation of unbound proteins, although the amount of lipid loss upon liposome elution was higher than expected. In addition, coarse-grained molecular dynamics simulations were employed to ascertain key membrane parameters, such as the membrane thickness and area per lipid. Overall, this study highlights the importance of surface charge and membrane fluidity in influencing the extent of protein adsorption. We hope that our investigation will be a valuable contribution to better understanding protein-vesicle interactions for improved nanocarrier design.
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Affiliation(s)
- Roxana-Maria Amărandi
- Nanotechnology
Laboratory, TRANSCEND Research Center, Regional
Institute of Oncology, 2-4 General Henri Mathias Berthelot Street, 700483 Iaşi, Romania
- Department
of Bioinformatics, TRANSCEND Research Center, Regional Institute of Oncology, 2-4 General Henri Mathias Berthelot Street, 700483 Iaşi, Romania
| | - Andrei Neamṭu
- Department
of Bioinformatics, TRANSCEND Research Center, Regional Institute of Oncology, 2-4 General Henri Mathias Berthelot Street, 700483 Iaşi, Romania
- Department
of Physiology, “Grigore T. Popa”
University of Medicine and Pharmacy, 16 Universităṭii Street, 700115 Iaşi, Romania
| | - Rareş-Ionuṭ Ştiufiuc
- Nanotechnology
Laboratory, TRANSCEND Research Center, Regional
Institute of Oncology, 2-4 General Henri Mathias Berthelot Street, 700483 Iaşi, Romania
- Department
of Nanobiophysics, MedFuture Research Center for Advanced Medicine, “Iuliu Hatieganu” University of Medicine
and Pharmacy, 4-6 Pasteur
Street, 400337 Cluj-Napoca, Romania
| | - Luminiṭa Marin
- Nanotechnology
Laboratory, TRANSCEND Research Center, Regional
Institute of Oncology, 2-4 General Henri Mathias Berthelot Street, 700483 Iaşi, Romania
- “Petru
Poni” Institute of Macromolecular Chemistry of Romanian Academy, 41A Grigore Ghica Vodă Alley, 700487 Iaşi, Romania
| | - Brînduşa Drăgoi
- Nanotechnology
Laboratory, TRANSCEND Research Center, Regional
Institute of Oncology, 2-4 General Henri Mathias Berthelot Street, 700483 Iaşi, Romania
- Faculty of
Chemistry, Alexandru Ioan Cuza University of Iaşi, 11 Carol I Boulevard, 700506 Iaşi, Romania
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2
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Walrant A, Sachon E. Photoaffinity labeling coupled to MS to identify peptide biological partners: Secondary reactions, for better or for worse? MASS SPECTROMETRY REVIEWS 2024. [PMID: 38576378 DOI: 10.1002/mas.21880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 02/22/2024] [Accepted: 03/13/2024] [Indexed: 04/06/2024]
Abstract
Affinity photolabeling is a smart method to study noncovalent and transient interactions and provide a submolecular picture of the contacts between interacting partners. In this review, we will focus on the identification of peptide partners using photoaffinity labeling coupled to mass spectrometry in different contexts such as in vitro with a purified potential partner, in model systems such as model membranes, and with live cells using both targeted and nontargeted proteomics studies. Different biological partners will be described, among which glycoconjugates, oligonucleotides, peptides, proteins, and lipids, with the photoreactive label inserted either on the peptide of interest or on the potential partner. Particular attention will be paid to the observation and characterization of specific rearrangements following the photolabeling reaction, which can help characterize photoadducts and provide a better understanding of the interacting systems and environment.
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Affiliation(s)
- Astrid Walrant
- Laboratoire des Biomolécules, LBM, Sorbonne Université, École normale supérieure, PSL University, CNRS, Paris, France
| | - Emmanuelle Sachon
- Laboratoire des Biomolécules, LBM, Sorbonne Université, École normale supérieure, PSL University, CNRS, Paris, France
- Sorbonne Université, Mass Spectrometry Sciences Sorbonne Université, MS3U platform, Fédération de Chimie moléculaire de Paris centre, Paris, France
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3
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Korn P, Schwieger C, Gruhle K, Garamus VM, Meister A, Ihling C, Drescher S. Azide- and diazirine-modified membrane lipids: Physicochemistry and applicability to study peptide/lipid interactions via cross-linking/mass spectrometry. BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2022; 1864:184004. [PMID: 35841926 DOI: 10.1016/j.bbamem.2022.184004] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 07/06/2022] [Accepted: 07/07/2022] [Indexed: 06/15/2023]
Abstract
Although the incorporation of photo-activatable lipids into membranes potentially opens new avenues for studying interactions with peptides and proteins, the question of whether azide- or diazirine-modified lipids are suitable for such studies remains controversial. We have recently shown that diazirine-modified lipids can indeed form cross-links to membrane peptides after UV activation and that these cross-links can be precisely determined in their position by mass spectrometry (MS). However, we also observed an unexpected backfolding of the lipid's diazirine-containing stearoyl chain to the membrane interface challenging the potential application of this modified lipid for future cross-linking (XL)-MS studies of protein/lipid interactions. In this work, we compared an azide- (AzidoPC) and a diazirine-modified (DiazPC) membrane lipid regarding their self-assembly properties, their mixing behavior with saturated bilayer-forming phospholipids, and their reactivity upon UV activation using differential scanning calorimetry (DSC), dynamic light scattering (DLS), small-angle X-ray scattering (SAXS), transmission electron microscopy (TEM), and MS. Mixtures of both modified lipids with DMPC were further used for photo-chemically induced XL experiments with a transmembrane model peptide (KLAW23) to elucidate similarities and differences between the azide and the diazirine moiety. We showed that both photo-reactive lipids can be used to study lipid/peptide and lipid/protein interactions. The AzidoPC proved easier to handle, whereas the DiazPC had fewer degradation products and a higher cross-linking yield. However, the problem of backfolding occurs in both lipids; thus, it seems to be a general phenomenon.
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Affiliation(s)
- Patricia Korn
- Institute of Pharmacy-Pharmaceutical Chemistry and Bioanalytics, Charles Tanford Protein Center, Martin Luther University (MLU) Halle-Wittenberg, Kurt-Mothes-Str. 3a, 06120 Halle (Saale), Germany
| | - Christian Schwieger
- Institute of Chemistry, MLU Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120 Halle (Saale), Germany
| | - Kai Gruhle
- Institute of Pharmacy-Pharmaceutical Chemistry and Bioanalytics, Charles Tanford Protein Center, Martin Luther University (MLU) Halle-Wittenberg, Kurt-Mothes-Str. 3a, 06120 Halle (Saale), Germany; Institute of Pharmacy-Biophysical Pharmacy, MLU Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120 Halle (Saale), Germany
| | - Vasil M Garamus
- Helmholtz-Zentrum Hereon, Max-Planck-Str. 1, 21502 Geesthacht, Germany
| | - Annette Meister
- Interdisciplinary Research Center HALOmem, MLU Halle-Wittenberg, Charles Tanford Protein Center, Kurt-Mothes-Str. 3a, 06120 Halle (Saale), Germany; Institute of Biochemistry and Biotechnology-Physical Biotechnology, Charles Tanford Protein Center, MLU Halle-Wittenberg, Kurt-Mothes-Str. 3a, 06120 Halle (Saale), Germany
| | - Christian Ihling
- Institute of Pharmacy-Pharmaceutical Chemistry and Bioanalytics, Charles Tanford Protein Center, Martin Luther University (MLU) Halle-Wittenberg, Kurt-Mothes-Str. 3a, 06120 Halle (Saale), Germany; Center for Structural Mass Spectrometry, Kurt-Mothes-Str. 3, 06120 Halle (Saale), Germany
| | - Simon Drescher
- Institute of Pharmacy-Biophysical Pharmacy, MLU Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120 Halle (Saale), Germany; Phospholipid Research Center, Im Neuenheimer Feld 515, 69120 Heidelberg, Germany.
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4
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Bae J, Zhang G, Park H, Warren WS, Wang Q. 15N-Azides as practical and effective tags for developing long-lived hyperpolarized agents. Chem Sci 2021; 12:14309-14315. [PMID: 34760217 DOI: 10.1039/d1sc04647k] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Accepted: 10/08/2021] [Indexed: 01/24/2023] Open
Abstract
Azide moieties, unique linear species containing three nitrogen atoms, represent an attractive class of molecular tag for hyperpolarized magnetic resonance imaging (HP-MRI). Here we demonstrate (15N)3-azide-containing molecules exhibit long-lasting hyperpolarization lifetimes up to 9.8 min at 1 T with remarkably high polarization levels up to 11.6% in water, thus establishing (15N)3-azide as a powerful spin storage for hyperpolarization. A single (15N)-labeled azide has also been examined as an effective alternative tag with long-lived hyperpolarization. A variety of biologically important molecules are studied in this work, including choline, glucose, amino acid, and drug derivatives, demonstrating great potential of 15N-labeled azides as universal hyperpolarized tags for nuclear magnetic resonance imaging applications.
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Affiliation(s)
- Junu Bae
- Department of Chemistry, Duke University Durham North Carolina 27708 USA
| | - Guannan Zhang
- Department of Chemistry, Duke University Durham North Carolina 27708 USA
| | - Hyejin Park
- Department of Chemistry, Duke University Durham North Carolina 27708 USA
| | - Warren S Warren
- Department of Chemistry, Duke University Durham North Carolina 27708 USA .,Department of Physics, Duke University Durham North Carolina 27708 USA.,Department of Radiology and Biomedical Engineering, Duke University Durham North Carolina 27708 USA
| | - Qiu Wang
- Department of Chemistry, Duke University Durham North Carolina 27708 USA
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5
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Dorner J, Korn P, Gruhle K, Ramsbeck D, Garamus VM, Lilie H, Meister A, Schwieger C, Ihling C, Sinz A, Drescher S. A Diazirine-Modified Membrane Lipid to Study Peptide/Lipid Interactions - Chances and Challenges. Chemistry 2021; 27:14586-14593. [PMID: 34406694 PMCID: PMC8597076 DOI: 10.1002/chem.202102048] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Indexed: 01/19/2023]
Abstract
Although incorporation of photo‐activatable lipids into membranes potentially opens up novel avenues for investigating interactions with proteins, the question of whether diazirine‐modified lipids are suitable for such studies, remains under debate. Focusing on the potential for studying lipid/peptide interactions by cross‐linking mass spectrometry (XL‐MS), we developed a diazirine‐modified lipid (DiazPC), and examined its behaviour in membranes incorporating the model α‐helical peptide LAVA20. We observed an unexpected backfolding of the diazirine‐containing stearoyl chain of the lipid. This surprising behaviour challenges the potential application of DiazPC for future XL‐MS studies of peptide and protein/lipid interactions. The observations made for DiazPC most likely represent a general phenomenon for any type of membrane lipids with a polar moiety incorporated into the alkyl chain. Our finding is therefore of importance for future protein/lipid interaction studies relying on modified lipid probes.
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Affiliation(s)
- Julia Dorner
- Institute of Pharmacy-Pharmaceutical Chemistry and Bioanalytics, Martin Luther University (MLU) Halle-Wittenberg, Kurt-Mothes-Str. 3, 06120, Halle (Saale), Germany
| | - Patricia Korn
- Institute of Pharmacy-Pharmaceutical Chemistry and Bioanalytics, Martin Luther University (MLU) Halle-Wittenberg, Kurt-Mothes-Str. 3, 06120, Halle (Saale), Germany
| | - Kai Gruhle
- Institute of Pharmacy-Pharmaceutical Chemistry and Bioanalytics, Martin Luther University (MLU) Halle-Wittenberg, Kurt-Mothes-Str. 3, 06120, Halle (Saale), Germany.,Institute of Pharmacy-Biophysical Pharmacy, MLU Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120, Halle (Saale), Germany
| | - Daniel Ramsbeck
- Fraunhofer Institute for Cell Therapy and Immunology IZI, Weinbergweg 22, 06120, Halle (Saale), Germany.,Institute of Pharmacy, University Leipzig, Brüderstr. 34, 04103, Leipzig, Germany
| | - Vasil M Garamus
- Helmholtz-Zentrum Hereon, Max-Planck-Str. 1, 21502, Geesthacht, Germany
| | - Hauke Lilie
- Institute for Biochemistry and Biotechnology-Technical Biochemistry, MLU Halle-Wittenberg, Kurt-Mothes-Str. 3, 06120, Halle (Saale), Germany
| | - Annette Meister
- Institute of Biochemistry and Biotechnology-Physical Biotechnology Charles Tanford Protein Center, MLU Halle-Wittenberg, Kurt-Mothes-Str. 3a, 06120, Halle (Saale), Germany.,Interdisciplinary Research Center HALOmem, MLU Halle-Wittenberg Charles Tanford Protein Center, Kurt-Mothes-Str. 3a, 06120, Halle (Saale), Germany
| | - Christian Schwieger
- Interdisciplinary Research Center HALOmem, MLU Halle-Wittenberg Charles Tanford Protein Center, Kurt-Mothes-Str. 3a, 06120, Halle (Saale), Germany
| | - Christian Ihling
- Institute of Pharmacy-Pharmaceutical Chemistry and Bioanalytics, Martin Luther University (MLU) Halle-Wittenberg, Kurt-Mothes-Str. 3, 06120, Halle (Saale), Germany.,Center for Structural Mass Spectrometry, Kurt-Mothes-Str. 3, 06120, Halle (Saale), Germany
| | - Andrea Sinz
- Institute of Pharmacy-Pharmaceutical Chemistry and Bioanalytics, Martin Luther University (MLU) Halle-Wittenberg, Kurt-Mothes-Str. 3, 06120, Halle (Saale), Germany.,Center for Structural Mass Spectrometry, Kurt-Mothes-Str. 3, 06120, Halle (Saale), Germany
| | - Simon Drescher
- Institute of Pharmacy-Biophysical Pharmacy, MLU Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120, Halle (Saale), Germany.,Phospholipid Research Center, Im Neuenheimer Feld 515, 69120, Heidelberg, Germany
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6
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Gruhle K, Tuchtenhagen M, Müller S, Hause G, Meister A, Drescher S. Synthesis and aggregation behaviour of single-chain, 1,32-alkyl-branched bis(phosphocholines) - part 2: lateral chain length triggers self-assembling from sheets to fibres to vesicles. Org Biomol Chem 2021; 18:3585-3598. [PMID: 32347287 DOI: 10.1039/d0ob00534g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Six single-chain, 1,32-alkyl-branched bis(phosphocholines) PC-C32(1,32Cm)-PC have been synthesized as model lipids for naturally occurring archaeal membrane lipids. The preparation of these bipolar amphiphiles bearing lateral alkyl chains of different lengths (C4-C15) was realized using a Cu-catalyzed Grignard bis-coupling reaction of various primary alkyl-branched bromides as side parts and a 1,22-dibromide as the centre part. The aggregation behaviour of these bolalipids in water was initially investigated by differential scanning calorimetry and transmission electron microscopy. As a main result, the types of aggregates found and their stability upon heating were strongly connected to the length of the lateral alkyl chain of the bolalipid: short and long lateral chains led to lamellar structures, whereas side chains of medium length led to fibrous aggregates. In future, these bolalipids could be used to produce tailored and stabilized liposomes for oral drug delivery.
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Affiliation(s)
- Kai Gruhle
- Institute of Pharmacy - Biophysical Pharmacy, Martin Luther University (MLU), Wolfgang-Langenbeck-Strasse 4, 01620 Halle (Saale), Germany.
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7
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Hoffmann M, Drescher S, Ihling C, Hinderberger D, Schwieger C. An Azidolipid Monolayer - Transitions, Miscibility, and UV Reactivity Studied by Infrared Reflection Absorption Spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:12804-12815. [PMID: 33090001 DOI: 10.1021/acs.langmuir.0c01726] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this study, we characterized monolayers of an azide-modified lipid at the air-water interface, pure and in its mixtures with the model lipid DPPC, with the aim of proving its potential to be applied for photo-cross-linking with other molecules. We chose a phospholipid bearing a terminal azide group in one of its hydrophobic tails to study its monolayer characteristics with the Langmuir film balance technique. Furthermore, we performed infrared reflection absorption spectroscopy (IRRAS) to get detailed insights into the organization of those monolayers as well as high-resolution mass spectrometry (HRMS) to see the effects of UV-irradiation on the lipids' chemical structure and organization. Our results suggest that in expanded monolayers of pure azide-modified membrane lipids, the azido-terminated chain folds back toward the air-water interface. Above the LE/LC (liquid-expanded/liquid-condensed) phase transition, the chains stretched, and thus, the azide group detaches from the interface. From temperature-dependent monolayer compressions, we evaluated all relevant thermodynamic parameters of the monolayers, such as the phase transition pressure, the critical temperature, and the triple point, and compare them to those of model lipids. For future applications, we studied the miscibility of the azide-modified lipid with DPPC in monolayers and found at least a certain miscibility over all investigated mixing ratios ranging from 10 to 75% of the azidolipid. Finally, we irradiated the azidolipid monolayer with UV light at 305 nm and measured photodissociation of the azide, leading to chemical cross-linking with other lipids, which shows the potential to be used as a cross-linking agent within self-assembled lipid or lipid/protein layers.
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Affiliation(s)
- Matthias Hoffmann
- Institute of Chemistry - Complex Self-Organizing Systems, Martin Luther University (MLU) Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120 Halle (Saale), Germany
- Institute of Biochemistry and Biotechnology - Interdisciplinary Research Center HALOmem, Charles Tanford Protein Center, MLU Halle-Wittenberg, Kurt-Mothes-Str. 3a, 06120 Halle (Saale), Germany
| | - Simon Drescher
- Institute of Pharmacy - Biophysical Pharmacy, MLU Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120 Halle (Saale), Germany
- Phospholipid Research Center, Im Neuenheimer Feld 515, 69120 Heidelberg, Germany
| | - Christian Ihling
- Institute of Pharmacy - Pharmaceutical Chemistry and Bioanalytics, Charles Tanford Protein Center, MLU Halle-Wittenberg, Kurt-Mothes-Str. 3a, 06120 Halle (Saale), Germany
| | - Dariush Hinderberger
- Institute of Chemistry - Complex Self-Organizing Systems, Martin Luther University (MLU) Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120 Halle (Saale), Germany
- Institute of Biochemistry and Biotechnology - Interdisciplinary Research Center HALOmem, Charles Tanford Protein Center, MLU Halle-Wittenberg, Kurt-Mothes-Str. 3a, 06120 Halle (Saale), Germany
| | - Christian Schwieger
- Institute of Chemistry - Complex Self-Organizing Systems, Martin Luther University (MLU) Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120 Halle (Saale), Germany
- Institute of Biochemistry and Biotechnology - Interdisciplinary Research Center HALOmem, Charles Tanford Protein Center, MLU Halle-Wittenberg, Kurt-Mothes-Str. 3a, 06120 Halle (Saale), Germany
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8
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Drescher S, Meister A, Hause G, Neuhaus F, Balog S, Brezesinski G, Zumbuehl A. Tuning the Thickness of a Biomembrane by Stapling Diamidophospholipids with Bolalipids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:8610-8616. [PMID: 32609528 DOI: 10.1021/acs.langmuir.0c01522] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In a biological membrane, proteins require specific lipids of distinctive length and chain saturation surrounding them. The active tuning of the membrane thickness therefore opens new possibilities in the study and manipulation of membrane proteins. Here, we introduce the concept of stapling phospholipids to different degrees of interdigitation depth by mixing 1,3-diamidophospholipids with single-chain bolalipids. The mixed membranes were studied by calorimetric assays, electron microscopy, X-ray, and infrared measurements to provide a complete biophysical characterization of membrane stapling. The matching between the diamidophospholipids and the bolalipids can be so strong as to completely induce a new phase that is more stable than the gel phase of the individual components.
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Affiliation(s)
- Simon Drescher
- Institute of Pharmacy-Biophysical Pharmacy, Martin Luther University (MLU) Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120 Halle (Saale), Germany
- Phospholipid Research Center, Im Neuenheimer Feld 515, 69120 Heidelberg, Germany
| | - Annette Meister
- ZIK HALOmem and Institute of Biochemistry and Biotechnology, Charles Tanford Protein Center, MLU Halle-Wittenberg, Kurt-Mothes-Str. 3a, 06120 Halle (Saale), Germany
| | - Gerd Hause
- Biocenter, MLU Halle-Wittenberg, Weinbergweg 22, 06120 Halle (Saale), Germany
| | - Frederik Neuhaus
- National Centre of Competence in Research in Chemical Biology, 1211 Geneva, Switzerland
| | - Sandor Balog
- Adolphe-Merkle-Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Gerald Brezesinski
- Max Planck Institute of Colloids and Interfaces, Science Park Potsdam-Golm, Am Mühlenberg 1, 14476 Potsdam, Germany
| | - Andreas Zumbuehl
- National Centre of Competence in Research in Chemical Biology, 1211 Geneva, Switzerland
- Acthera Therapeutics Ltd. Peter Merian-Str. 45, 4052 Basel, Switzerland
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9
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Bender J, Schmidt C. Mass spectrometry of membrane protein complexes. Biol Chem 2020; 400:813-829. [PMID: 30956223 DOI: 10.1515/hsz-2018-0443] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 02/25/2019] [Indexed: 12/24/2022]
Abstract
Membrane proteins are key players in the cell. Due to their hydrophobic nature they require solubilising agents such as detergents or membrane mimetics during purification and, consequently, are challenging targets in structural biology. In addition, their natural lipid environment is crucial for their structure and function further hampering their analysis. Alternative approaches are therefore required when the analysis by conventional techniques proves difficult. In this review, we highlight the broad application of mass spectrometry (MS) for the characterisation of membrane proteins and their interactions with lipids. We show that MS unambiguously identifies the protein and lipid components of membrane protein complexes, unravels their three-dimensional arrangements and further provides clues of protein-lipid interactions.
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Affiliation(s)
- Julian Bender
- Interdisciplinary Research Center HALOmem, Charles Tanford Protein Centre, Martin Luther University Halle-Wittenberg, Institute for Biochemistry and Biotechnology, Kurt-Mothes-Str. 3a, D-06120 Halle, Germany
| | - Carla Schmidt
- Interdisciplinary Research Center HALOmem, Charles Tanford Protein Centre, Martin Luther University Halle-Wittenberg, Institute for Biochemistry and Biotechnology, Kurt-Mothes-Str. 3a, D-06120 Halle, Germany
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10
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Müller S, Schwieger C, Gruhle K, Garamus VM, Hause G, Meister A, Drescher S. Azide-Modified Membrane Lipids: Miscibility with Saturated Phosphatidylcholines. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:12439-12450. [PMID: 31456406 DOI: 10.1021/acs.langmuir.9b01842] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In this study, we describe the miscibility of four azide-modified membrane phospholipids (azidolipids) with conventional phospholipids. The azidolipids bear an azide group at different positions of the sn-1 or sn-2 alkyl chain and they further differ in the type of linkage (ester vs ether) of the sn-2 alkyl chain. Investigations regarding the miscibility of the azidolipids with bilayer-forming phosphatidylcholines will evaluate lipid mixtures that are suitable for the production of stable azidolipid-doped liposomes. These vesicles then serve as model membranes for the incorporation of model peptides or proteins in the future. The miscibility of both types of phospholipids was studied by calorimetric assays, electron microscopy, small-angle X-ray scattering, infrared spectroscopy, and dynamic light scattering to provide a complete biophysical characterization of the mixed systems.
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Affiliation(s)
- Sindy Müller
- Institute of Pharmacy-Biophysical Pharmacy , Martin Luther University (MLU) Halle-Wittenberg , Wolfgang-Langenbeck-Strasse 4 , 06120 Halle (Saale) , Germany
| | - Christian Schwieger
- Institute of Chemistry , MLU Halle-Wittenberg , von-Danckelmann-Platz 4 , 06120 Halle (Saale) , Germany
| | - Kai Gruhle
- Institute of Pharmacy-Biophysical Pharmacy , Martin Luther University (MLU) Halle-Wittenberg , Wolfgang-Langenbeck-Strasse 4 , 06120 Halle (Saale) , Germany
| | - Vasil M Garamus
- Helmholtz-Zentrum Geesthacht (HZG): Zentrum für Material- und Küstenforschung GmbH , Max-Planck-Strasse 1 , 21502 Geesthacht , Germany
| | - Gerd Hause
- Biocenter , MLU Halle-Wittenberg , Weinbergweg 22 , 06120 Halle (Saale) , Germany
| | - Annette Meister
- ZIK HALOmem and Institute of Biochemistry and Biotechnology, Charles Tanford Protein Center , MLU Halle-Wittenberg , Kurt-Mothes-Strasse 3a , 06120 Halle (Saale) , Germany
| | - Simon Drescher
- Institute of Pharmacy-Biophysical Pharmacy , Martin Luther University (MLU) Halle-Wittenberg , Wolfgang-Langenbeck-Strasse 4 , 06120 Halle (Saale) , Germany
- Institute of Pharmacy , University of Greifswald , Friedrich-Ludwig-Jahn-Str. 17 , 17489 Greifswald , Germany
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11
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Stuhr-Hansen N, Vagianou CD, Blixt O. Clustering of Giant Unilamellar Vesicles Promoted by Covalent and Noncovalent Bonding of Functional Groups at Membrane-Embedded Peptides. Bioconjug Chem 2019; 30:2156-2164. [DOI: 10.1021/acs.bioconjchem.9b00394] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Nicolai Stuhr-Hansen
- Department of Chemistry, Chemical Biology, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
| | - Charikleia-Despoina Vagianou
- Department of Chemistry, Chemical Biology, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
| | - Ola Blixt
- Department of Chemistry, Chemical Biology, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
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Gruhle K, Müller S, Meister A, Drescher S. Synthesis and aggregation behaviour of single-chain, 1,32-alkyl branched bis(phosphocholines): effect of lateral chain length. Org Biomol Chem 2019; 16:2711-2724. [PMID: 29589028 DOI: 10.1039/c8ob00424b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Three novel single-chain bis(phosphocholines) bearing two lateral alkyl chains of variable length next to the headgroup have been synthesized as model lipids for naturally occurring archaeal membrane lipids. The synthesis was realized using the Cu-catalyzed Grignard bis-coupling reaction of a primary bromide as a side part and a 1,ω-dibromide as a centre part. We could show that the aggregation behaviour of the resulting bolalipids strongly depends on the length of the lateral alkyl chain: the C3-branched bolalipid self-assembles into lamellar sheets, whereas the C6- and C9-analogues form nanofibres. The lamella-forming bolalipids could be used in the future to prepare stable and tailored liposomes for oral drug delivery.
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Affiliation(s)
- K Gruhle
- Institute of Pharmacy, Biophysical Pharmacy, Martin Luther University (MLU) Halle-Wittenberg, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany.
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Müller S, Meister A, Otto C, Hause G, Drescher S. Mixing behaviour of asymmetrical glycerol diether bolalipids with saturated and unsaturated phosphatidylcholines. Biophys Chem 2018; 238:39-48. [DOI: 10.1016/j.bpc.2018.04.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 04/17/2018] [Accepted: 04/21/2018] [Indexed: 12/17/2022]
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Drescher S, Otto C, Müller S, Garamus VM, Garvey CJ, Grünert S, Lischka A, Meister A, Blume A, Dobner B. Impact of Headgroup Asymmetry and Protonation State on the Aggregation Behavior of a New Type of Glycerol Diether Bolalipid. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:4360-4373. [PMID: 29557659 DOI: 10.1021/acs.langmuir.8b00527] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In the present work, we describe the synthesis and the temperature-dependent aggregation behavior of a new class of asymmetrical glycerol diether bolalipids. These bolalipids are composed of a membrane-spanning alkyl chain with 32 carbon atoms (C32) in the sn-3 position, a methyl-branched C16 alkyl chain in the sn-2 position, and a zwitterionic phosphocholine headgroup in the sn-1 position of a glycerol moiety. The long C32 alkyl chain is terminated either by a second phosphocholine (PC-Gly(2C16Me)C32-PC) or by a phosphodimethylethanolamine headgroup (PC-Gly(2C16Me)C32-Me2PE). The temperature- and pH-dependent aggregation behavior of both lipids was studied using differential scanning calorimetry (DSC), Fourier transform infrared (FTIR) spectroscopy, small-angle X-ray scattering (SAXS), and small-angle neutron scattering (SANS) experiments. The morphology of the formed aggregates in an aqueous suspension was visualized by transmission electron microscopy (TEM). We show that PC-Gly(2C16Me)C32-PC and PC-Gly(2C16Me)C32-Me2PE at pH 5 self-assemble into large lamellar aggregates and large lipid vesicles. Within these structures, the bolalipid molecules are probably assembled in a monolayer with fully interdigitated chains. The lipid molecules seem to be tilted with respect to the layer normal to ensure a dense packing of the alkyl chains. A temperature increase leads to a transition from a lamellar gel phase to the liquid-crystalline phase at about 28-30 °C for both bolalipids. The lamellar aggregates of PC-Gly(2C16Me)C32-Me2PE started to transform into nanofibers when the pH value of the suspension was increased to above 11. At pH 12, these nanofibers were the dominant aggregates.
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Affiliation(s)
| | | | | | - Vasil M Garamus
- Helmholtz-Zentrum Geesthacht: Centre for Materials and Coastal Research (HZG) , Max-Planck-Strasse 1 , 21502 Geesthacht , Germany
| | - Christopher J Garvey
- Australian Nuclear Science and Technology Organisation (ANSTO) , Kirrawee DC , NSW Australia
| | | | | | - Annette Meister
- Institute of Biochemistry and Biotechnology , MLU Halle-Wittenberg , Kurt-Mothes-Strasse 3 , 06120 Halle (Saale) , Germany
| | - Alfred Blume
- Institute of Chemistry , MLU Halle-Wittenberg , von-Danckelmann-Platz 4 , 06120 Halle (Saale) , Germany
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