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Ghassemi N, Poulhazan A, Deligey F, Mentink-Vigier F, Marcotte I, Wang T. Solid-State NMR Investigations of Extracellular Matrixes and Cell Walls of Algae, Bacteria, Fungi, and Plants. Chem Rev 2021; 122:10036-10086. [PMID: 34878762 DOI: 10.1021/acs.chemrev.1c00669] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Extracellular matrixes (ECMs), such as the cell walls and biofilms, are important for supporting cell integrity and function and regulating intercellular communication. These biomaterials are also of significant interest to the production of biofuels and the development of antimicrobial treatment. Solid-state nuclear magnetic resonance (ssNMR) and magic-angle spinning-dynamic nuclear polarization (MAS-DNP) are uniquely powerful for understanding the conformational structure, dynamical characteristics, and supramolecular assemblies of carbohydrates and other biomolecules in ECMs. This review highlights the recent high-resolution investigations of intact ECMs and native cells in many organisms spanning across plants, bacteria, fungi, and algae. We spotlight the structural principles identified in ECMs, discuss the current technical limitation and underexplored biochemical topics, and point out the promising opportunities enabled by the recent advances of the rapidly evolving ssNMR technology.
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Affiliation(s)
- Nader Ghassemi
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Alexandre Poulhazan
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States.,Department of Chemistry, Université du Québec à Montréal, Montreal H2X 2J6, Canada
| | - Fabien Deligey
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | | | - Isabelle Marcotte
- Department of Chemistry, Université du Québec à Montréal, Montreal H2X 2J6, Canada
| | - Tuo Wang
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
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2
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Wang J, Ma Y, Hou S. Effect of potassium ions at the different concentration on the interaction between AmB and the lipid monolayer containing cholesterol or ergosterol. Biochem Biophys Res Commun 2020; 521:699-705. [DOI: 10.1016/j.bbrc.2019.10.166] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 10/24/2019] [Indexed: 11/24/2022]
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3
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Wang J, Ma Y, Hou S, Miao Z, Ma Q. Interaction of amphotericin B and saturated or unsaturated phospholipid monolayers containing cholesterol or ergosterol at the air-water interface. Biophys Chem 2019; 258:106317. [PMID: 31918025 DOI: 10.1016/j.bpc.2019.106317] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 12/05/2019] [Accepted: 12/14/2019] [Indexed: 12/31/2022]
Abstract
The antimicrobial activity of amphotericin B (AmB) depends on its interaction with ergosterol-containing cell membranes of fungus. Cholesterol is a sterol in mammalian cell membrane, and its structure is very similar to ergosterol, which caused to the toxic of amphotericin B to mammalian or human cell membranes. Even so, it is still the gold standard for the treatment of fungal infections. The mechanism of its toxicity to mammalian cell membrane has become a hot topic. The toxicity mechanism of amphotericin B on the cell membrane is also related to the phospholipids on the membrane. The effects of saturated and unsaturated fat chains on the interaction of amphotericin B with phospholipid monolayers containing cholesterol or ergosterol were studied at the molecular level using an air-water interface monolayer model. Both atomic force microscope and Brewster angle microscope were used to observe the surface morphology of the monolayer. The analysis of limiting molecular area suggested that the interaction between AmB and the two kinds of sterol is significantly different on the unsaturated lipid monolayer. According to the elastic modulus, the AmB molecules can increase the compressibility or viscoelasticity of the phospholipid/sterol monolayer. However, this impact of AmB on the DOPC/sterol monolayer containing ergosterol was stronger than that containing cholesterol at 25 ~ 50 mN/m. While this impact of AmB on the DPPC/sterol monolayer containing cholesterol was stronger than that containing ergosterol at 32 ~ 56 mN/m. The excess Gibbs free energy of the monolayer showed that, in the presence of saturated fat chain, amphotericin B could make the molecules of the DPPC/cholesterol monolayer and the DPPC/ergosterol monolayer arrange more closely and make intermolecular interaction stronger. There was no significant difference between DPPC/cholesterol monolayer and DPPC/ergosterol monolayer. However, in the presence of unsaturated chain, the effects of amphotericin B on the DOPC/cholesterol monolayer and the DOPC/ergosterol monolayer were significantly different. Amphotericin B made the molecular arrangement of DOPC/ergosterol monolayer more loosed, and the intermolecular force weakened at 5-35 mN/m. AFM images reflect that AmB can perforate the phospholipid-ergosterol monolayer, which was no significant correlation with saturation of the lipid monolayer. But the areas of dark areas shaped holes on the DPPC/ergosterol monolayer were larger than that on the DOPC/ergosterol monolayer. The adsorption of amphotericin B on lipid/sterol monolayer suggests that the orientation of amphotericin B may be different when it is inserted into the monolayer of phospholipid-sterol in the presence of saturated or unsaturated chains. The results are helpful to understand the complex mechanism of toxicity of amphotericin B to cell membrane.
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Affiliation(s)
- Juan Wang
- Shaanxi Engineering Research Center of Controllable Neutron Source, School of Science, Xijing University, Xi'an 710123, China.
| | - Yahong Ma
- School of Electronic Information Engineering Internet of Things and Big Data Research center, Xijing University, Xi'an 710123, China
| | - Suxia Hou
- Shaanxi Engineering Research Center of Controllable Neutron Source, School of Science, Xijing University, Xi'an 710123, China
| | - Zongcheng Miao
- Key Laboratory of Organic Polymer Photoelectric Materials, School of Science, Xijing University, Xi'an 710123, China
| | - Qiang Ma
- Key Laboratory of Organic Polymer Photoelectric Materials, School of Science, Xijing University, Xi'an 710123, China
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Yamamoto T, Umegawa Y, Tsuchikawa H, Hanashima S, Matsumori N, Funahashi K, Seo S, Shinoda W, Murata M. The Amphotericin B-Ergosterol Complex Spans a Lipid Bilayer as a Single-Length Assembly. Biochemistry 2019; 58:5188-5196. [PMID: 31793296 DOI: 10.1021/acs.biochem.9b00835] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Amphotericin B (AmB) is a polyene macrolide antibiotic clinically used as an antifungal drug. Its preferential complexation with ergosterol (Erg), the major sterol of fungal membranes, leads to the formation of a barrel-stave-like ion channel across a lipid bilayer. To gain a better understanding of the mechanism of action, the mode of lipid bilayer spanning provides essential information. However, because of the lack of methodologies to observe it directly, it has not been revealed for the Erg-containing channel assembly for many years. In this study, we disclosed that the AmB-Erg complex spans a lipid bilayer with a single-molecule length, using solid-state nuclear magnetic resonance (NMR) experiments. Paramagnetic relaxation enhancement by Mn2+ residing near the surface of lipid bilayers induced the depth-dependent decay of 13C NMR signals for individual carbon atoms of AmB. We found that both terminal segments, the 41-COOH group and C38-C40 methyl groups, come close to the lipid bilayer surfaces, suggesting that the AmB-Erg complex spans a palmitoyloleoylphosphatidylcholine (POPC) bilayer with a single-molecule length. Molecular dynamics simulation experiments further confirmed the stabilization of the AmB-Erg complex as a single-length spanning complex. These results provide experimental evidence of the single-length complex incorporated in the membrane by making thinner a POPC-Erg bilayer that mimics fungal membranes.
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Affiliation(s)
- Tomoya Yamamoto
- Department of Chemistry, Graduate School of Science , Osaka University , 1-1 Machikaneyama , Toyonaka , Osaka 560-0043 , Japan.,Project Research Center for Fundamental Sciences, Graduate School of Science , Osaka University , 1-1 Machikaneyama , Toyonaka , Osaka 560-0043 , Japan
| | - Yuichi Umegawa
- Department of Chemistry, Graduate School of Science , Osaka University , 1-1 Machikaneyama , Toyonaka , Osaka 560-0043 , Japan.,Project Research Center for Fundamental Sciences, Graduate School of Science , Osaka University , 1-1 Machikaneyama , Toyonaka , Osaka 560-0043 , Japan
| | - Hiroshi Tsuchikawa
- Department of Chemistry, Graduate School of Science , Osaka University , 1-1 Machikaneyama , Toyonaka , Osaka 560-0043 , Japan
| | - Shinya Hanashima
- Department of Chemistry, Graduate School of Science , Osaka University , 1-1 Machikaneyama , Toyonaka , Osaka 560-0043 , Japan
| | - Nobuaki Matsumori
- Department of Chemistry, Graduate School of Science , Osaka University , 1-1 Machikaneyama , Toyonaka , Osaka 560-0043 , Japan.,Department of Chemistry, Graduate School of Science , Kyushu University , Fukuoka 819-0395 , Japan
| | - Kosuke Funahashi
- Department of Materials Chemistry , Nagoya University , Nagoya 464-8603 , Japan
| | - Sangjae Seo
- Department of Materials Chemistry , Nagoya University , Nagoya 464-8603 , Japan
| | - Wataru Shinoda
- Department of Materials Chemistry , Nagoya University , Nagoya 464-8603 , Japan
| | - Michio Murata
- Department of Chemistry, Graduate School of Science , Osaka University , 1-1 Machikaneyama , Toyonaka , Osaka 560-0043 , Japan
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5
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Tsuchikawa H, Umegawa Y, Murata M, Oishi T. A Synthetic Approach to the Channel Complex Structure of Antibiotic in a Membrane: Backbone <sup>19</sup>F-Labeled Amphotericin B for Solid-State NMR Analysis. J SYN ORG CHEM JPN 2018. [DOI: 10.5059/yukigoseikyokaishi.76.1197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Yuichi Umegawa
- Department of Chemistry, Graduate School of Science, Osaka University
| | - Michio Murata
- Department of Chemistry, Graduate School of Science, Osaka University
| | - Tohru Oishi
- Department of Chemistry, Graduate School of Science, Kyushu University
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6
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Ciesielski F, Griffin DC, Loraine J, Rittig M, Delves-Broughton J, Bonev BB. Recognition of Membrane Sterols by Polyene Antifungals Amphotericin B and Natamycin, A (13)C MAS NMR Study. Front Cell Dev Biol 2016; 4:57. [PMID: 27379235 PMCID: PMC4911417 DOI: 10.3389/fcell.2016.00057] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Accepted: 05/30/2016] [Indexed: 01/30/2023] Open
Abstract
The molecular action of polyene macrolides with antifungal activity, amphotericin B and natamycin, involves recognition of sterols in membranes. Physicochemical and functional studies have contributed details to understanding the interactions between amphotericin B and ergosterol and, to a lesser extent, with cholesterol. Fewer molecular details are available on interactions between natamycin with sterols. We use solid state (13)C MAS NMR to characterize the impact of amphotericin B and natamycin on mixed lipid membranes of DOPC/cholesterol or DOPC/ergosterol. In cholesterol-containing membranes, amphotericin B addition resulted in marked increase in both DOPC and cholesterol (13)C MAS NMR linewidth, reflecting membrane insertion and cooperative perturbation of the bilayer. By contrast, natamycin affects little either DOPC or cholesterol linewidth but attenuates cholesterol resonance intensity preferentially for sterol core with lesser impact on the chain. Ergosterol resonances, attenuated by amphotericin B, reveal specific interactions in the sterol core and chain base. Natamycin addition selectively augmented ergosterol resonances from sterol core ring one and, at the same time, from the end of the chain. This puts forward an interaction model similar to the head-to-tail model for amphotericin B/ergosterol pairing but with docking on opposite sterol faces. Low toxicity of natamycin is attributed to selective, non-cooperative sterol engagement compared to cooperative membrane perturbation by amphotericin B.
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Affiliation(s)
- Filip Ciesielski
- School of Life Sciences, Queen's Medical Centre, University of Nottingham Nottingham, UK
| | - David C Griffin
- School of Life Sciences, Queen's Medical Centre, University of Nottingham Nottingham, UK
| | - Jessica Loraine
- School of Life Sciences, Queen's Medical Centre, University of Nottingham Nottingham, UK
| | - Michael Rittig
- School of Life Sciences, Queen's Medical Centre, University of Nottingham Nottingham, UK
| | | | - Boyan B Bonev
- School of Life Sciences, Queen's Medical Centre, University of Nottingham Nottingham, UK
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7
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Tutaj K, Szlazak R, Starzyk J, Wasko P, Grudzinski W, Gruszecki WI, Luchowski R. The orientation of the transition dipole moments of a polyene antibiotic Amphotericin B under UV–VIS studies. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2015. [DOI: 10.1016/j.jphotobiol.2015.07.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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8
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Kamiński DM, Pociecha D, Górecka E, Gagoś M. The influence of amphotericin B on the molecular organization and structural properties of DPPC lipid membranes modified by sterols. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.10.081] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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9
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10
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Anderson TM, Clay MC, Cioffi AG, Diaz KA, Hisao GS, Tuttle MD, Nieuwkoop AJ, Comellas G, Maryum N, Wang S, Uno BE, Wildeman EL, Gonen T, Rienstra CM, Burke MD. Amphotericin forms an extramembranous and fungicidal sterol sponge. Nat Chem Biol 2014; 10:400-6. [PMID: 24681535 PMCID: PMC3992202 DOI: 10.1038/nchembio.1496] [Citation(s) in RCA: 299] [Impact Index Per Article: 29.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Accepted: 02/20/2014] [Indexed: 01/14/2023]
Abstract
For over 50 years, amphotericin has remained the powerful but highly toxic last line of defense in treating life-threatening fungal infections in humans with minimal development of microbial resistance. Understanding how this small molecule kills yeast is thus critical for guiding development of derivatives with an improved therapeutic index and other resistance-refractory antimicrobial agents. In the widely accepted ion channel model for its mechanism of cytocidal action, amphotericin forms aggregates inside lipid bilayers that permeabilize and kill cells. In contrast, we report that amphotericin exists primarily in the form of large, extramembranous aggregates that kill yeast by extracting ergosterol from lipid bilayers. These findings reveal that extraction of a polyfunctional lipid underlies the resistance-refractory antimicrobial action of amphotericin and suggests a roadmap for separating its cytocidal and membrane-permeabilizing activities. This new mechanistic understanding is also guiding development of what are to our knowledge the first derivatives of amphotericin that kill yeast but not human cells.
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Affiliation(s)
- Thomas M Anderson
- 1] Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA. [2]
| | - Mary C Clay
- 1] Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA. [2]
| | - Alexander G Cioffi
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Katrina A Diaz
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Grant S Hisao
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Marcus D Tuttle
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Andrew J Nieuwkoop
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Gemma Comellas
- Center for Biophysics and Computational Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Nashrah Maryum
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Shu Wang
- 1] Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA. [2] Howard Hughes Medical Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Brice E Uno
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Erin L Wildeman
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Tamir Gonen
- Howard Hughes Medical Institute, Janelia Farm Research Campus, Ashburn, Virginia, USA
| | - Chad M Rienstra
- 1] Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA. [2] Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA. [3] Center for Biophysics and Computational Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Martin D Burke
- 1] Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA. [2] Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA. [3] Howard Hughes Medical Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
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11
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Cegelski L. REDOR NMR for drug discovery. Bioorg Med Chem Lett 2013; 23:5767-75. [PMID: 24035486 PMCID: PMC4038398 DOI: 10.1016/j.bmcl.2013.08.064] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2013] [Revised: 08/12/2013] [Accepted: 08/14/2013] [Indexed: 11/19/2022]
Abstract
Rotational-echo double-resonance (REDOR) NMR is a powerful and versatile solid-state NMR measurement that has been recruited to elucidate drug modes of action and to drive the design of new therapeutics. REDOR has been implemented to examine composition, structure, and dynamics in diverse macromolecular and whole-cell systems, including taxol-bound microtubules, enzyme-cofactor-inhibitor ternary complexes, and antibiotic-whole-cell complexes. The REDOR approach involves the integrated design of specific isotopic labeling strategies and the selection of appropriate REDOR experiments. By way of example, this digest illustrates the versatility of the REDOR approach, with an emphasis on the practical considerations of experimental design and data interpretation.
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Affiliation(s)
- Lynette Cegelski
- Department of Chemistry, Stanford University, Stanford, CA 94305, USA.
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12
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Magic angle spinning NMR study of interaction of N-terminal sequence of dermorphin (Tyr-d-Ala-Phe-Gly) with phospholipids. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2012; 1818:2579-87. [DOI: 10.1016/j.bbamem.2012.06.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2012] [Revised: 06/05/2012] [Accepted: 06/18/2012] [Indexed: 01/02/2023]
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13
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Matsuoka S. [Structural study on small molecules in biological solid samples by using solid state NMR]. YAKUGAKU ZASSHI 2012; 132:969-78. [PMID: 23023412 DOI: 10.1248/yakushi.132.969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Many small molecule drugs have molecular targets that are non-crystalline and insoluble biological matrices, such as proteins embedded in lipid membrane, cell membranes, and cell walls. To understand the action mechanisms, it is essential to determine the binding structure with atomic-level resolution. Although solution nuclear magnetic resonance (NMR) and X-ray crystallography have been used to determine molecular structures of cell membrane and membrane proteins, these methods are unable to reproduce the complexity of biological systems because either solubilization or crystallization of target molecules is requisite. For structural studies of insoluble non-crystalline biological samples, so-called "biological solids", high resolution distance measurements using solid-state NMR are indispensable techniques, of which rotational-echo double-resonance (REDOR) is one of the most widely used methods. In this paper, a brief introduction to REDOR NMR and its applications to structural studies on the antifungal amphotericin B-membrane phospholipid complex and a structural elucidation of photorespiration metabolites in plant cells without extraction or isolation is provided.
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Affiliation(s)
- Shigeru Matsuoka
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan.
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Matsushita N, Matsuo Y, Tsuchikawa H, Matsumori N, Murata M, Oishi T. Synthesis of 25-13C-Amphotericin B Methyl Ester: A Molecular Probe for Solid-state NMR Measurements. CHEM LETT 2009. [DOI: 10.1246/cl.2009.114] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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15
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Matsuoka S, Inoue M. Application of REDOR NMR in natural product chemistry. Chem Commun (Camb) 2009:5664-75. [DOI: 10.1039/b910230b] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Umegawa Y, Matsumori N, Oishi T, Murata M. Ergosterol Increases the Intermolecular Distance of Amphotericin B in the Membrane-Bound Assembly As Evidenced by Solid-State NMR. Biochemistry 2008; 47:13463-9. [DOI: 10.1021/bi801875y] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuichi Umegawa
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Nobuaki Matsumori
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Tohru Oishi
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Michio Murata
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
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17
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Mohr J, Johnson M, Cooper T, Lewis JS, Ostrosky-Zeichner L. Current Options in Antifungal Pharmacotherapy. Pharmacotherapy 2008; 28:614-45. [DOI: 10.1592/phco.28.5.614] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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18
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Murata M, Matsumori N, Konoki K, Oishi T. Structural Features of Dinoflagellate Toxins Underlying Biological Activity as Viewed by NMR. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2008. [DOI: 10.1246/bcsj.81.307] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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19
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Kasai Y, Matsumori N, Umegawa Y, Matsuoka S, Ueno H, Ikeuchi H, Oishi T, Murata M. Self-Assembled Amphotericin B Is Probably Surrounded by Ergosterol: Bimolecular Interactions as Evidenced by Solid-State NMR and CD Spectra. Chemistry 2008; 14:1178-85. [DOI: 10.1002/chem.200701256] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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20
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Matsumori N, Houdai T, Murata M. Conformation and Position of Membrane-Bound Amphotericin B Deduced from NMR in SDS Micelles. J Org Chem 2007; 72:700-6. [PMID: 17253784 DOI: 10.1021/jo061309p] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Amphotericin B (AmB) is known to self-assemble to form an ion channel across lipid bilayer membranes. To gain insight into the conformation of AmB in lipidic environments, AmB in SDS micelles was subjected to high-resolution NMR and CD measurements, and the NMR-derived conformation thus obtained was refined by molecular mechanics calculations. These results indicate that AmB in SDS micelles is conformationally fixed particularly for the macrolide moiety. Paramagnetic relaxation experiments with the use of Mn2+ reveal that AmB is shallowly embedded in the micelle with the polyhydroxyl chain being close to the water interface and the side of polyene portion facing to the micelle interior. CD measurements demonstrate that AmB is in a monomeric form in SDS micelles. The structure of AmB in the micelles obtained in the present study may reproduce the initial stage of membrane interaction of AmB prior to the assembly formation in biomembranes.
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Affiliation(s)
- Nobuaki Matsumori
- Department of Chemistry, Graduate School of Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-0043, Japan
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