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Kumar K, Arnold AA, Gauthier R, Mamone M, Paquin JF, Warschawski DE, Marcotte I. 19F solid-state NMR approaches to probe antimicrobial peptide interactions with membranes in whole cells. BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2024; 1866:184269. [PMID: 38176532 DOI: 10.1016/j.bbamem.2023.184269] [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: 09/27/2023] [Revised: 12/19/2023] [Accepted: 12/21/2023] [Indexed: 01/06/2024]
Abstract
To address the global problem of bacterial antibiotic resistance, antimicrobial peptides (AMPs) are considered promising therapeutic candidates due to their broad-spectrum and membrane-lytic activity. As preferential interactions with bacteria are crucial, it is equally important to investigate and understand their impact on eukaryotic cells. In this study, we employed 19F solid-state nuclear magnetic resonance (ssNMR) as a novel approach to examine the interaction of AMPs with whole red blood cells (RBCs). We used RBC ghosts (devoid of hemoglobin) and developed a protocol to label their lipid membranes with palmitic acid (PA) monofluorinated at carbon positions 4, 8, or 14 on the acyl chain, allowing us to probe different locations in model and intact RBC ghost membranes. Our work revealed that changes in the 19F chemical shift anisotropy, monitored through a CF bond order parameter (SCF), can provide insights into lipid bilayer dynamics. This information was also obtained using magic-angle spinning 19F ssNMR spectra with and without 1H decoupling, by studying alterations in the second spectral moment (M2) as well as the 19F isotropic chemical shift, linewidth, T1, and T2 relaxation times. The appearance of an additional isotropic peak with a smaller chemical shift anisotropy, a narrower linewidth, and a shorter T1, induced by the AMP caerin 1.1, supports the presence of high-curvature regions in RBCs indicative of pore formation, analogous to its antimicrobial mechanism. In summary, the straightforward incorporation of monofluorinated FAs and rapid signal acquisition offer promising avenues for the study of whole cells using 19F ssNMR.
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Affiliation(s)
- Kiran Kumar
- Departement of Chemistry, Université du Québec à Montréal, P.O. Box 8888, Downtown Station, Montreal H3C 3P8, Canada
| | - Alexandre A Arnold
- Departement of Chemistry, Université du Québec à Montréal, P.O. Box 8888, Downtown Station, Montreal H3C 3P8, Canada
| | - Raphaël Gauthier
- PROTEO, CCVC, Département de chimie, Université Laval, 1045 Avenue de la Médecine, Québec, Québec G1V 0A6, Canada
| | - Marius Mamone
- PROTEO, CCVC, Département de chimie, Université Laval, 1045 Avenue de la Médecine, Québec, Québec G1V 0A6, Canada
| | - Jean-François Paquin
- PROTEO, CCVC, Département de chimie, Université Laval, 1045 Avenue de la Médecine, Québec, Québec G1V 0A6, Canada
| | - Dror E Warschawski
- Departement of Chemistry, Université du Québec à Montréal, P.O. Box 8888, Downtown Station, Montreal H3C 3P8, Canada; Laboratoire des Biomolécules, LBM, CNRS UMR 7203, Sorbonne Université, École normale supérieure, PSL University, 75005 Paris, France.
| | - Isabelle Marcotte
- Departement of Chemistry, Université du Québec à Montréal, P.O. Box 8888, Downtown Station, Montreal H3C 3P8, Canada.
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Yang Y, Tsien J, Ben David A, Hughes JME, Merchant RR, Qin T. Practical and Modular Construction of C(sp 3)-Rich Alkyl Boron Compounds. J Am Chem Soc 2020; 143:471-480. [PMID: 33347297 DOI: 10.1021/jacs.0c11964] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Alkyl boronic acids and esters play an important role in the synthesis of C(sp3)-rich medicines, agrochemicals, and material chemistry. This work describes a new type of transition-metal-free mediated transformation to enable the construction of C(sp3)-rich and sterically hindered alkyl boron reagents in a practical and modular manner. The broad generality and functional group tolerance of this method is extensively examined through a variety of substrates, including synthesis and late-stage functionalization of scaffolds relevant to medicinal chemistry. The strategic significance of this approach, with alkyl boronic acids as linchpins, is demonstrated through various downstream functionalizations of the alkyl boron compounds. This two-step concurrent cross-coupling approach, resembling formal and flexible alkyl-alkyl couplings, provides a general entry to synthetically challenging high Fsp3-containing drug-like scaffolds.
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Affiliation(s)
- Yangyang Yang
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390, United States
| | - Jet Tsien
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390, United States
| | - Ayala Ben David
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390, United States
| | - Jonathan M E Hughes
- Department of Process Research and Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Rohan R Merchant
- Department of Discovery Chemistry, Merck & Co., Inc., South San Francisco, California 94080, United States
| | - Tian Qin
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390, United States
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De Biasio A, Ibáñez de Opakua A, Bostock MJ, Nietlispach D, Diercks T, Blanco FJ. A generalized approach for NMR studies of lipid-protein interactions based on sparse fluorination of acyl chains. Chem Commun (Camb) 2018; 54:7306-7309. [PMID: 29905339 DOI: 10.1039/c8cc02483a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Sparse lipid fluorination enhances the lipids' 1H signal dispersion, enables clean molecular distinction by 19F NMR, and evinces micelle insertion of proteins via fluorine-induced signal shifts. We present a minimal fluorination scheme, and illustrate the concept on di-(4-fluoro)-heptanoylphosphatidylcholine micelles and solubilised seven-helix transmembrane pSRII protein.
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Novel approaches to probe the binding of recoverin to membranes. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2018; 47:679-691. [DOI: 10.1007/s00249-018-1304-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 04/05/2018] [Accepted: 04/13/2018] [Indexed: 02/08/2023]
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New insights into the influence of monofluorination on dimyristoylphosphatidylcholine membrane properties: A solid-state NMR study. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2018; 1860:654-663. [DOI: 10.1016/j.bbamem.2017.12.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 11/29/2017] [Accepted: 12/04/2017] [Indexed: 10/18/2022]
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7
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Gagnon MC, Auger M, Paquin JF. Progress in the synthesis of fluorinated phosphatidylcholines for biological applications. Org Biomol Chem 2018; 16:4925-4941. [DOI: 10.1039/c8ob00991k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fluorinated phospholipids have attracted a lot of interest over the past 40 years. While mono- and polyfluorinated analogs are mostly designed to be used as 19F NMR probes, highly fluorinated phospholipids are mainly developed as drug delivery devices and oxygen carriers. This review describes their synthetic pathways, their properties and potential applications.
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Affiliation(s)
| | - Michèle Auger
- PROTEO
- CERMA
- CQMF
- Département de Chimie
- Université Laval
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Gagnon MC, Dautrey S, Bertrand X, Auger M, Paquin JF. A Flexible Synthetic Approach to Phosphatidylglycerols. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701178] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Marie-Claude Gagnon
- CERMA; PROTEO; CQMF; Département de chimie; Université Laval; 1045 avenue de la Médecine G1V 0A6 Québec QC Canada
- CGCC; PROTEO; Département de chimie; Université Laval; 1045 avenue de la Médecine G1V 0A6 Québec QC Canada
| | - Sébastien Dautrey
- CERMA; PROTEO; CQMF; Département de chimie; Université Laval; 1045 avenue de la Médecine G1V 0A6 Québec QC Canada
- CGCC; PROTEO; Département de chimie; Université Laval; 1045 avenue de la Médecine G1V 0A6 Québec QC Canada
| | - Xavier Bertrand
- CERMA; PROTEO; CQMF; Département de chimie; Université Laval; 1045 avenue de la Médecine G1V 0A6 Québec QC Canada
- CGCC; PROTEO; Département de chimie; Université Laval; 1045 avenue de la Médecine G1V 0A6 Québec QC Canada
| | - Michèle Auger
- CERMA; PROTEO; CQMF; Département de chimie; Université Laval; 1045 avenue de la Médecine G1V 0A6 Québec QC Canada
| | - Jean-Francois Paquin
- CGCC; PROTEO; Département de chimie; Université Laval; 1045 avenue de la Médecine G1V 0A6 Québec QC Canada
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Chen H, Zhu L, Li C. Silver-catalyzed radical carbofluorination of unactivated alkenes with acetic acid in aqueous solution. Org Chem Front 2017. [DOI: 10.1039/c6qo00854b] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The AgNO3-catalyzed carbofluorination of unactivated alkenes with acetic acid provides an efficient and general route to γ-fluorinated carboxylic acids.
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Affiliation(s)
- He Chen
- Key Laboratory of Organofluorine Chemistry and Collaborative Innovation Center of Chemistry for Life Sciences
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Lin Zhu
- Key Laboratory of Organofluorine Chemistry and Collaborative Innovation Center of Chemistry for Life Sciences
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Chaozhong Li
- Key Laboratory of Organofluorine Chemistry and Collaborative Innovation Center of Chemistry for Life Sciences
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
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Affiliation(s)
- Mark B. Frampton
- Department of Chemistry and Centre for BiotechnologyBrock UniversityOntarioCanada
| | - Paul M. Zelisko
- Department of Chemistry and Centre for BiotechnologyBrock UniversityOntarioCanada
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Gagnon MC, Turgeon B, Savoie JD, Parent JF, Auger M, Paquin JF. Evaluation of the effect of fluorination on the property of monofluorinated dimyristoylphosphatidylcholines. Org Biomol Chem 2014; 12:5126-35. [DOI: 10.1039/c4ob00934g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The synthesis and characterization of three monofluorinated dimyristoylphosphatidylcholines, with the fluorine atom located at the extremities of the acyl chain in position 2 of the glycerol (sn-2), is described.
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Affiliation(s)
- Marie-Claude Gagnon
- Department of Chemistry
- PROTEO
- CERMA
- Québec, Canada
- Canada Research Chair in Organic and Medicinal Chemistry
| | - Bianka Turgeon
- Department of Chemistry
- PROTEO
- CERMA
- Québec, Canada
- Canada Research Chair in Organic and Medicinal Chemistry
| | - Jean-Daniel Savoie
- Department of Chemistry
- PROTEO
- CERMA
- Québec, Canada
- Canada Research Chair in Organic and Medicinal Chemistry
| | - Jean-François Parent
- Department of Chemistry
- PROTEO
- CERMA
- Québec, Canada
- Canada Research Chair in Organic and Medicinal Chemistry
| | | | - Jean-François Paquin
- Canada Research Chair in Organic and Medicinal Chemistry
- Department of Chemistry
- PROTEO
- CGCC
- Québec, Canada
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12
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Takahashi H, Yoshino M, Takagi T, Amii H, Baba T, Kanamori T, Sonoyama M. Non-ideal mixing of dimyristoylphosphatidylcholine with its partially fluorinated analogue in hydrated bilayers. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2012.12.067] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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