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Leitao SM, Navikas V, Miljkovic H, Drake B, Marion S, Pistoletti Blanchet G, Chen K, Mayer SF, Keyser UF, Kuhn A, Fantner GE, Radenovic A. Spatially multiplexed single-molecule translocations through a nanopore at controlled speeds. Nat Nanotechnol 2023; 18:1078-1084. [PMID: 37337057 DOI: 10.1038/s41565-023-01412-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 05/02/2023] [Indexed: 06/21/2023]
Abstract
In current nanopore-based label-free single-molecule sensing technologies, stochastic processes influence the selection of translocating molecule, translocation rate and translocation velocity. As a result, single-molecule translocations are challenging to control both spatially and temporally. Here we present a method using a glass nanopore mounted on a three-dimensional nanopositioner to spatially select molecules, deterministically tethered on a glass surface, for controlled translocations. By controlling the distance between the nanopore and glass surface, we can actively select the region of interest on the molecule and scan it a controlled number of times and at a controlled velocity. Decreasing the velocity and averaging thousands of consecutive readings of the same molecule increases the signal-to-noise ratio by two orders of magnitude compared with free translocations. We demonstrate the method's versatility by assessing DNA-protein complexes, DNA rulers and DNA gaps, achieving down to single-nucleotide gap detection.
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Affiliation(s)
- S M Leitao
- Laboratory for Bio- and Nano-Instrumentation, Institute of Bioengineering, School of Engineering, EPFL, Lausanne, Switzerland
| | - V Navikas
- Laboratory of Nanoscale Biology, Institute of Bioengineering, School of Engineering, EPFL, Lausanne, Switzerland
| | - H Miljkovic
- Laboratory of Nanoscale Biology, Institute of Bioengineering, School of Engineering, EPFL, Lausanne, Switzerland
| | - B Drake
- Laboratory for Bio- and Nano-Instrumentation, Institute of Bioengineering, School of Engineering, EPFL, Lausanne, Switzerland
| | - S Marion
- Laboratory of Nanoscale Biology, Institute of Bioengineering, School of Engineering, EPFL, Lausanne, Switzerland
| | - G Pistoletti Blanchet
- Laboratory of Molecular Biology, Institute of Life Technologies, School of Engineering, HES-SO Valais-Wallis, Sion, Switzerland
- Central Environmental Laboratory, Institute of Environmental Engineering, ENAC, EPFL, Sion, Switzerland
| | - K Chen
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - S F Mayer
- Laboratory of Nanoscale Biology, Institute of Bioengineering, School of Engineering, EPFL, Lausanne, Switzerland
| | - U F Keyser
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - A Kuhn
- Laboratory of Molecular Biology, Institute of Life Technologies, School of Engineering, HES-SO Valais-Wallis, Sion, Switzerland
| | - G E Fantner
- Laboratory for Bio- and Nano-Instrumentation, Institute of Bioengineering, School of Engineering, EPFL, Lausanne, Switzerland.
| | - A Radenovic
- Laboratory of Nanoscale Biology, Institute of Bioengineering, School of Engineering, EPFL, Lausanne, Switzerland.
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Mayer SF, Rodrigues JE, Sobrados I, Gainza J, Fernández-Díaz MT, Marini C, Asensio MC, Alonso JA. Synergy of diffraction and spectroscopic techniques to unveil the crystal structure of antimonic acid. Sci Rep 2021; 11:17763. [PMID: 34493767 PMCID: PMC8423724 DOI: 10.1038/s41598-021-97147-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 08/17/2021] [Indexed: 02/07/2023] Open
Abstract
The elusive crystal structure of the so-called 'antimonic acid' has been investigated by means of robust and state-of-the-art techniques. The synergic results of solid-state magic-angle spinning nuclear magnetic resonance spectroscopy and a combined Rietveld refinement from synchrotron X-ray and neutron powder diffraction data reveal that this compound contains two types of protons, in a pyrochlore-type structure of stoichiometric formula (H3O)1.20(7)H0.77(9)Sb2O6. Some protons belong to heavily delocalized H3O+ subunits, while some H+ are directly bonded to the oxygen atoms of the covalent framework of the pyrochlore structure, with O-H distances close to 1 Å. A proton diffusion mechanism is proposed relying on percolation pathways determined by bond-valence energy landscape analysis. X-ray absorption spectroscopy results corroborate the structural data around Sb5+ ions at short-range order. Thermogravimetric analysis and differential scanning calorimetry endorsed the conclusions on the water content within antimonic acid. Additional 0.7 water molecules per formula were assessed as moisture water by thermal analysis.
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Affiliation(s)
- S. F. Mayer
- grid.452504.20000 0004 0625 9726Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - J. E. Rodrigues
- grid.452504.20000 0004 0625 9726Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain ,grid.5398.70000 0004 0641 6373European Synchrotron Radiation Facility, ESRF, 71 Avenue des Martyrs, 38043 Grenoble, France
| | - I. Sobrados
- grid.452504.20000 0004 0625 9726Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - J. Gainza
- grid.452504.20000 0004 0625 9726Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - M. T. Fernández-Díaz
- grid.156520.50000 0004 0647 2236Institut Laue Langevin (ILL), BP 156X, 38042 Grenoble, France
| | - C. Marini
- grid.423639.9CELLS-ALBA Synchrotron, Cerdanyola del Valles, 08290 Barcelona, Spain
| | - M. C. Asensio
- grid.452504.20000 0004 0625 9726Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - J. A. Alonso
- grid.452504.20000 0004 0625 9726Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
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Orru RVA, Groenendaal B, van Heyst J, Hunting M, Wesseling C, Schmitz RF, Mayer SF, Faber K. Biomimetic approach toward the stereoselective synthesis of acetogenins. PURE APPL CHEM 2003. [DOI: 10.1351/pac200375020259] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Acetogenins isolated from the Annonaceae family of tropical trees have drawn considerable attention owing to their broad spectrum of biological activities. They are structurally characterized by the presence of one to three tetrahydrofuran rings in the center of a long (partly hydroxylated) hydrocarbon chain that ends in a (functionalized) butenolide moiety. Here we describe some of our results toward the first asymmetric total synthesis of cis-gigantrionenin, a principal acetogenin. In this approach, an enzyme-catalyzed epoxide hydrolysis and an enzyme-triggered double cyclization are crucial and give stereoselective access to essential chiral building blocks.
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Affiliation(s)
- R. V. A. Orru
- 1Department of Chemistry, Vrije University Amsterdam, De Boelelaan 1083, NL-1081 HV, Amsterdam, The Netherlands
| | - Bas Groenendaal
- 1Department of Chemistry, Vrije University Amsterdam, De Boelelaan 1083, NL-1081 HV, Amsterdam, The Netherlands
| | - J. van Heyst
- 1Department of Chemistry, Vrije University Amsterdam, De Boelelaan 1083, NL-1081 HV, Amsterdam, The Netherlands
| | - Mark Hunting
- 1Department of Chemistry, Vrije University Amsterdam, De Boelelaan 1083, NL-1081 HV, Amsterdam, The Netherlands
| | - C. Wesseling
- 1Department of Chemistry, Vrije University Amsterdam, De Boelelaan 1083, NL-1081 HV, Amsterdam, The Netherlands
| | - R. F. Schmitz
- 1Department of Chemistry, Vrije University Amsterdam, De Boelelaan 1083, NL-1081 HV, Amsterdam, The Netherlands
| | - S. F. Mayer
- 2Department of Chemistry, University of Graz, Heinrichstrasse 28, A-8010, Graz, Austria
| | - K. Faber
- 2Department of Chemistry, University of Graz, Heinrichstrasse 28, A-8010, Graz, Austria
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Abstract
Organic compounds can be transformed through enzyme-triggered domino (or cascade) reactions via several (inseparable) consecutive steps in an asymmetric fashion to yield nonracemic products. Despite the fact that these sequences often involve the occurrence of highly reactive unstable intermediates, the overall efficiency of these processes can be high, provided that the reaction rates of the individual steps match each other in order to minimize side reactions.
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Affiliation(s)
- S. M. Glueck
- 1Department of Chemistry, Organic and Bioorganic Chemistry, University of Graz, Heinrichstrasse 28, A-8010 Graz, Austria
| | - S. F. Mayer
- 1Department of Chemistry, Organic and Bioorganic Chemistry, University of Graz, Heinrichstrasse 28, A-8010 Graz, Austria
| | - Wolfgang Kroutil
- 1Department of Chemistry, Organic and Bioorganic Chemistry, University of Graz, Heinrichstrasse 28, A-8010 Graz, Austria
| | - K. Faber
- 1Department of Chemistry, Organic and Bioorganic Chemistry, University of Graz, Heinrichstrasse 28, A-8010 Graz, Austria
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Steinreiber A, Strauss U, Mayer SF, Uray G. Simultaneous direct high-performance liquid chromatographic enantioseparation of 2-methylglycidol-1-benzyl ether and 2-methylglycerol-1-benzyl ether using a solvent-switching technique. J Chromatogr A 2001; 911:295-8. [PMID: 11293591 DOI: 10.1016/s0021-9673(01)00528-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Simultaneous HPLC separation of the enantiomers of 3-benzyloxy-2-methyl-1,2-propanediol and the corresponding 3-benzyloxy-2-methyl-1,2-propene oxide could be accomplished on amylose derived Chiralpak AD switching between 10% 2-propanol and 3% 1,2-dimethoxyethane as polar modifier in n-heptane.
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Affiliation(s)
- A Steinreiber
- Karl-Franzens University Graz, Institut für Chemie, Austria
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