1
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Pradhan N, Hilty C. Cross-Polarization of Insensitive Nuclei from Water Protons for Detection of Protein-Ligand Binding. J Am Chem Soc 2024; 146:24754-24758. [PMID: 39225120 PMCID: PMC11403598 DOI: 10.1021/jacs.4c08241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
Hyperpolarization derived from water protons enhances the NMR signal of 15N nuclei in a small molecule, enabling the sensitive detection of a protein-ligand interaction. The water hyperpolarized by dissolution dynamic nuclear polarization (D-DNP) acts as a universal signal enhancement agent. The 15N signal of benzamidine was increased by 1480-fold through continuous polarization transfer by J-coupling-mediated cross-polarization (J-CP) via the exchangeable protons. The signal enhancement factor favorably compares to factors of 110- or 17-fold using non-CP-based polarization transfer mechanisms. The hyperpolarization enabled detection of the binding of benzamidine to the target protein trypsin with a single-scan measurement of 15N R2 relaxation. J-CP provides an efficient polarization mechanism for 15N or other low-frequency nuclei near an exchangeable proton. The hyperpolarization transfer sustained within the relaxation time limit of water protons additionally can be applied for the study of macromolecular structure and biological processes.
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Affiliation(s)
- Nirmalya Pradhan
- Chemistry Department, Texas A&M University, 3255 TAMU, College Station, Texas 77843, United States
| | - Christian Hilty
- Chemistry Department, Texas A&M University, 3255 TAMU, College Station, Texas 77843, United States
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2
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Hamachi T, Yanai N. Recent developments in materials and applications of triplet dynamic nuclear polarization. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2024; 142-143:55-68. [PMID: 39237253 DOI: 10.1016/j.pnmrs.2024.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2024] [Revised: 05/02/2024] [Accepted: 05/09/2024] [Indexed: 09/07/2024]
Abstract
Dynamic nuclear polarization (DNP) is a method for achieving high levels of nuclear spin polarization by transferring spin polarization from electrons to nuclei by microwave irradiation, resulting in higher sensitivity in NMR/MRI. In particular, DNP using photoexcited triplet electron spins (triplet-DNP) can provide a hyperpolarized nuclear spin state at room temperature and in low magnetic field. In this review article, we highlight recent developments in materials and instrumentation for the application of triplet-DNP. First, a brief history and principles of triplet-DNP will be presented. Next, important advances in recent years will be outlined: new materials to hyperpolarize water and biomolecules; high-sensitivity solution NMR by dissolution triplet-DNP; and strategies for further improvement of the polarization. In view of these developments, future directions to widen the range of applications of triplet-DNP will be discussed.
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Affiliation(s)
- Tomoyuki Hamachi
- Department of Applied Chemistry, Graduate School of Engineering, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Nobuhiro Yanai
- Department of Applied Chemistry, Graduate School of Engineering, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan; CREST, JST, Honcho 4-1-8, Kawaguchi, Saitama 332-0012, Japan.
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3
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Giannoulis A, Butbul K, Carmieli R, Kim J, Montrazi ET, Singh K, Frydman L. Cryogenic and Dissolution DNP NMR on γ-Irradiated Organic Molecules. J Am Chem Soc 2024; 146:20758-20769. [PMID: 39029111 PMCID: PMC11295201 DOI: 10.1021/jacs.4c04041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 06/19/2024] [Accepted: 06/21/2024] [Indexed: 07/21/2024]
Abstract
Nuclear magnetic resonance (NMR) plays a central role in the elucidation of chemical structures but is often limited by low sensitivity. Dissolution dynamic nuclear polarization (dDNP) emerges as a transformative methodology for both solution-state NMR and metabolic NMR imaging, which could overcome this limitation. Typically, dDNP relies on combining a stable radical with the analyte within a uniform glass under cryogenic conditions. The electron polarization is then transferred through microwave irradiation to the nuclei. The present study explores the use of radicals introduced via γ-irradiation, as bearers of the electron spins that will enhance 1H or 13C nuclides. 1H solid-state NMR spectra of γ-irradiated powders at 1-5 K revealed, upon microwave irradiation, signal enhancements that, in general, were higher than those achieved through conventional glass-based DNP. Transfer of these samples to a solution-state NMR spectrometer via a rapid dissolution driven by a superheated water provided significant enhancements of solution-state 1H NMR signals. Enhancements of 13C signals in the γ-irradiated solids were more modest, as a combined consequence of a low radical concentration and of the dilute concentration of 13C in the natural abundant samples examined. Nevertheless, ca. 700-800-fold enhancements in 13C solution NMR spectra of certain sites recorded at 11.7 T could still be achieved. A total disappearance of the radicals upon performing a dDNP-like aqueous dissolution and a high stability of the samples were found. Overall, the study showcases the advantages and limitations of γ-irradiated radicals as candidates for advancing spectroscopic dDNP-enhanced NMR.
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Affiliation(s)
- Angeliki Giannoulis
- Department
of Chemical and Biological Physics, Weizmann
Institute of Science, 234 Herzl Street, Rehovot 7610001, Israel
| | - Korin Butbul
- Department
of Chemical and Biological Physics, Weizmann
Institute of Science, 234 Herzl Street, Rehovot 7610001, Israel
| | - Raanan Carmieli
- Department
of Chemical Research Support, Weizmann Institute
of Science, 234 Herzl
Street, Rehovot 7610001, Israel
| | - Jihyun Kim
- Department
of Chemical and Biological Physics, Weizmann
Institute of Science, 234 Herzl Street, Rehovot 7610001, Israel
- Department
of Chemistry Education, Kyungpook National
University, Daegu 41566, Republic of Korea
| | - Elton Tadeu Montrazi
- Department
of Chemical and Biological Physics, Weizmann
Institute of Science, 234 Herzl Street, Rehovot 7610001, Israel
| | - Kawarpal Singh
- Department
of Chemical and Biological Physics, Weizmann
Institute of Science, 234 Herzl Street, Rehovot 7610001, Israel
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, Cambridge CB2 1EW, U.K.
| | - Lucio Frydman
- Department
of Chemical and Biological Physics, Weizmann
Institute of Science, 234 Herzl Street, Rehovot 7610001, Israel
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4
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Zachrdla M, Turhan E, Pötzl C, Sadet A, Vasos PR, Kurzbach D. Hyperpolarized nuclear Overhauser enhancement of alanine methyl groups by doubly relayed proton exchange. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2024; 364:107727. [PMID: 38941676 DOI: 10.1016/j.jmr.2024.107727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 06/03/2024] [Accepted: 06/20/2024] [Indexed: 06/30/2024]
Abstract
Hyperpolarized water in dissolution dynamic nuclear polarization (dDNP) experiments has emerged as a promising method for enhancing nuclear magnetic resonance (NMR) signals, particularly in studies of proteins and peptides. Herein, we focus on the application of "proton exchange-doubly relayed" nuclear Overhauser effects (NOE) from hyperpolarized water to achieve positive signal enhancement of methyl groups in the side chain of an alanine-glycine peptide. In particular, we show a cascade hyperpolarization transfer. Initial proton exchange between solvent and amide introduces hyperpolarization into the peptide. Subsequently, intermolecular NOE relays the hyperpolarization first to Ala-Hα and then in a second step to the Ala-CH3 moiety. Both NOEs have negative signs. Hence, the twice-relayed NOE pathway leads to a positive signal enhancement of the methyl group with respect to the thermal equilibrium magnetization. This effect might indicate a way towards hyperpolarized water-based signal enhancement for methyl groups, which are often used for NMR studies of large proteins in solution.
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Affiliation(s)
- Milan Zachrdla
- Institute of Biological Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 38, 1090 Vienna, Austria.
| | - Ertan Turhan
- Institute of Biological Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 38, 1090 Vienna, Austria; University of Vienna, Vienna Doctoral School in Chemistry (DoSChem), Währinger Str. 42, 1090 Vienna, Austria
| | - Christopher Pötzl
- Institute of Biological Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 38, 1090 Vienna, Austria; University of Vienna, Vienna Doctoral School in Chemistry (DoSChem), Währinger Str. 42, 1090 Vienna, Austria
| | - Aude Sadet
- Institute of Biological Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 38, 1090 Vienna, Austria; Biophysics and Biomedical Applications Laboratory and Group, LGED, Extreme Light Infrastructure-Nuclear Physics, "Horia Hulubei" National Institute for Physics and Nuclear Engineering IFIN-HH, Reactorului Street, No. 30, 077125 Bucharest-Magurele, Romania
| | - Paul R Vasos
- Institute of Biological Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 38, 1090 Vienna, Austria; Biophysics and Biomedical Applications Laboratory and Group, LGED, Extreme Light Infrastructure-Nuclear Physics, "Horia Hulubei" National Institute for Physics and Nuclear Engineering IFIN-HH, Reactorului Street, No. 30, 077125 Bucharest-Magurele, Romania; University of Bucharest, Interdisciplinary School for Doctoral Studies (ISDS), 36-46 Bd Kogalniceanu, RO-050107 Bucharest, Romania
| | - Dennis Kurzbach
- Institute of Biological Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 38, 1090 Vienna, Austria
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5
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Min S, Baek J, Kim J, Jeong HJ, Chung J, Jeong K. Water-Compatible and Recyclable Heterogeneous SABRE Catalyst for NMR Signal Amplification. JACS AU 2023; 3:2912-2917. [PMID: 37885596 PMCID: PMC10598823 DOI: 10.1021/jacsau.3c00487] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 09/20/2023] [Accepted: 09/22/2023] [Indexed: 10/28/2023]
Abstract
A water-compatible and recyclable catalyst for nuclear magnetic resonance (NMR) hyperpolarization via signal amplification by reversible exchange (SABRE) was developed. The [Ir(COD)(IMes)Cl] catalyst was attached to a polymeric resin of bis(2-pyridyl)amine (heterogeneous SABRE catalyst, HET-SABRE catalyst), and it amplified the 1H NMR signal of pyridine up to (-) 4455-fold (43.2%) at 1.4 T in methanol and (-) 50-fold (0.5%) in water. These are the highest amplification factors ever reported among HET-SABRE catalysts and for the first time in aqueous media. Moreover, the HET-SABRE catalyst demonstrated recyclability by retaining its activity in water after more than three uses. This newly designed polymeric resin-based heterogeneous catalyst shows great promise for NMR signal amplification for biomedical NMR and MRI applications in the future.
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Affiliation(s)
- Sein Min
- Department
of Chemistry, Seoul Women’s University, Seoul 01797, South Korea
| | - Juhee Baek
- Department
of Chemistry, Seoul Women’s University, Seoul 01797, South Korea
| | - Jisu Kim
- Department
of Chemistry, Seoul Women’s University, Seoul 01797, South Korea
| | - Hye Jin Jeong
- Department
of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Jean Chung
- Department
of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Keunhong Jeong
- Department
of Chemistry, Korea Military Academy, Seoul 01805, South Korea
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6
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Negroni M, Kurzbach D. Missing Pieces in Structure Puzzles: How Hyperpolarized NMR Spectroscopy Can Complement Structural Biology and Biochemistry. Chembiochem 2023; 24:e202200703. [PMID: 36624049 DOI: 10.1002/cbic.202200703] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/08/2023] [Accepted: 01/09/2023] [Indexed: 01/11/2023]
Abstract
Structure determination lies at the heart of many biochemical research programs. However, the "giants": X-ray diffraction, electron microscopy, molecular dynamics simulations, and nuclear magnetic resonance, among others, leave quite a few dark spots on the structural pictures drawn of proteins, nucleic acids, membranes, and other biomacromolecules. For example, structural models under physiological conditions or of short-lived intermediates often remain out of reach of the established experimental methods. This account frames the possibility of including hyperpolarized, that is, dramatically signal-enhanced NMR in existing workflows to fill these spots with detailed depictions. We highlight how integrating methods based on dissolution dynamic nuclear polarization can provide valuable complementary information about formerly inaccessible conformational spaces for many systems. A particular focus will be on hyperpolarized buffers to facilitate the NMR structure determination of challenging systems.
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Affiliation(s)
- Mattia Negroni
- Faculty of Chemistry, Institute of Biological Chemistry, University of Vienna, Währinger Str. 38, 1090, Vienna, Austria
| | - Dennis Kurzbach
- Faculty of Chemistry, Institute of Biological Chemistry, University of Vienna, Währinger Str. 38, 1090, Vienna, Austria
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7
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Negroni M, Turhan E, Kress T, Ceillier M, Jannin S, Kurzbach D. Frémy's Salt as a Low-Persistence Hyperpolarization Agent: Efficient Dynamic Nuclear Polarization Plus Rapid Radical Scavenging. J Am Chem Soc 2022; 144:20680-20686. [PMID: 36322908 PMCID: PMC9673139 DOI: 10.1021/jacs.2c07960] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Indexed: 11/17/2022]
Abstract
Nuclear magnetic resonance (NMR) spectroscopy is a key technique for molecular structure determination in solution. However, due to its low sensitivity, many efforts have been made to improve signal strengths and reduce the required substrate amounts. In this regard, dissolution dynamic nuclear polarization (DDNP) is a versatile approach as signal enhancements of over 10 000-fold are achievable. Samples are signal-enhanced ex situ by transferring electronic polarization from radicals to nuclear spins before dissolving and shuttling the boosted sample to an NMR spectrometer for detection. However, the applicability of DDNP suffers from one major drawback, namely, paramagnetic relaxation enhancements (PREs) that critically reduce relaxation times due to the codissolved radicals. PREs are the primary source of polarization losses canceling the signal improvements obtained by DNP. We solve this problem by using potassium nitrosodisulfonate (Frémy's salt) as polarization agent (PA), which provides high nuclear spin polarization and allows for rapid scavenging under mild reducing conditions. We demonstrate the potential of Frémy's salt, (i) showing that both 1H and 13C polarization of ∼30% can be achieved and (ii) describing a hybrid sample shuttling system (HySSS) that can be used with any DDNP/NMR combination to remove the PA before NMR detection. This gadget mixes the hyperpolarized solution with a radical scavenger and injects it into an NMR tube, providing, within a few seconds, quantitatively radical-free, highly polarized solutions. The cost efficiency and broad availability of Frémy's salt might facilitate the use of DDNP in many fields of research.
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Affiliation(s)
- Mattia Negroni
- Faculty
of Chemistry, Institute of Biological Chemistry, University Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Ertan Turhan
- Faculty
of Chemistry, Institute of Biological Chemistry, University Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Thomas Kress
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, Lensfield Road, Cambridge, CB2 1EW, U.K.
| | - Morgan Ceillier
- Centre
de Résonance Magnétique Nucléaire à Très
Hauts Champs (UMR 5082) Université de Lyon/CNRS/Université
Claude Bernard Lyon 1/ENS de Lyon, 5 Rue de la Doua, 69100 Villeurbanne, France
| | - Sami Jannin
- Centre
de Résonance Magnétique Nucléaire à Très
Hauts Champs (UMR 5082) Université de Lyon/CNRS/Université
Claude Bernard Lyon 1/ENS de Lyon, 5 Rue de la Doua, 69100 Villeurbanne, France
| | - Dennis Kurzbach
- Faculty
of Chemistry, Institute of Biological Chemistry, University Vienna, Währinger Straße 38, 1090 Vienna, Austria
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8
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Matsumoto N, Nishimura K, Kimizuka N, Nishiyama Y, Tateishi K, Uesaka T, Yanai N. Proton Hyperpolarization Relay from Nanocrystals to Liquid Water. J Am Chem Soc 2022; 144:18023-18029. [DOI: 10.1021/jacs.2c07518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Naoto Matsumoto
- Department of Applied Chemistry, Graduate School of Engineering, Center for Molecular Systems, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Koki Nishimura
- Department of Applied Chemistry, Graduate School of Engineering, Center for Molecular Systems, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Nobuo Kimizuka
- Department of Applied Chemistry, Graduate School of Engineering, Center for Molecular Systems, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Yusuke Nishiyama
- NanoCrystallography Unit, RIKEN-JEOL Collaboration Center, Tsurumi, Yokohama, Kanagawa 230-0045, Japan
- JEOL RESONANCE Inc., 3-1-2 Musashino, Akishima, Tokyo 196-8558, Japan
| | - Kenichiro Tateishi
- Cluster for Pioneering Research, RIKEN, RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - Tomohiro Uesaka
- Cluster for Pioneering Research, RIKEN, RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - Nobuhiro Yanai
- Department of Applied Chemistry, Graduate School of Engineering, Center for Molecular Systems, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
- PRESTO and FOREST, JST, Honcho 4-1-8, Kawaguchi, Saitama 332-0012, Japan
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9
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Epasto LM, Che K, Kozak F, Selimovic A, Kadeřávek P, Kurzbach D. Toward protein NMR at physiological concentrations by hyperpolarized water-Finding and mapping uncharted conformational spaces. SCIENCE ADVANCES 2022; 8:eabq5179. [PMID: 35930648 PMCID: PMC9355353 DOI: 10.1126/sciadv.abq5179] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 06/23/2022] [Indexed: 05/12/2023]
Abstract
Nuclear magnetic resonance (NMR) spectroscopy is a key method for determining the structural dynamics of proteins in their native solution state. However, the low sensitivity of NMR typically necessitates nonphysiologically high sample concentrations, which often limit the relevance of the recorded data. We show how to use hyperpolarized water by dissolution dynamic nuclear polarization (DDNP) to acquire protein spectra at concentrations of 1 μM within seconds and with a high signal-to-noise ratio. The importance of approaching physiological concentrations is demonstrated for the vital MYC-associated factor X, which we show to switch conformations when diluted. While in vitro conditions lead to a population of the well-documented dimer, concentrations lowered by more than two orders of magnitude entail dimer dissociation and formation of a globularly folded monomer. We identified this structure by integrating DDNP with computational techniques to overcome the often-encountered constraint of DDNP of limited structural information provided by the typically detected one-dimensional spectra.
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Affiliation(s)
- Ludovica M. Epasto
- University of Vienna, Faculty of Chemistry, Institute of Biological Chemistry, Währinger Str. 38, 1090 Vienna, Austria
| | - Kateryna Che
- University of Vienna, Faculty of Chemistry, Institute of Biological Chemistry, Währinger Str. 38, 1090 Vienna, Austria
| | - Fanny Kozak
- University of Vienna, Faculty of Chemistry, Institute of Biological Chemistry, Währinger Str. 38, 1090 Vienna, Austria
| | - Albina Selimovic
- University of Vienna, Faculty of Chemistry, Institute of Biological Chemistry, Währinger Str. 38, 1090 Vienna, Austria
| | - Pavel Kadeřávek
- Masaryk University, CEITEC, Kamenice 5, 625 00 Brno, Czech Republic
| | - Dennis Kurzbach
- University of Vienna, Faculty of Chemistry, Institute of Biological Chemistry, Währinger Str. 38, 1090 Vienna, Austria
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10
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Hilty C, Kurzbach D, Frydman L. Hyperpolarized water as universal sensitivity booster in biomolecular NMR. Nat Protoc 2022; 17:1621-1657. [PMID: 35546640 DOI: 10.1038/s41596-022-00693-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 02/25/2022] [Indexed: 11/09/2022]
Abstract
NMR spectroscopy is the only method to access the structural dynamics of biomolecules at high (atomistic) resolution in their native solution state. However, this method's low sensitivity has two important consequences: (i) typically experiments have to be performed at high concentrations that increase sensitivity but are not physiological, and (ii) signals have to be accumulated over long periods, complicating the determination of interaction kinetics on the order of seconds and impeding studies of unstable systems. Both limitations are of equal, fundamental relevance: non-native conditions are of limited pharmacological relevance, and the function of proteins, enzymes and nucleic acids often relies on their interaction kinetics. To overcome these limitations, we have developed applications that involve 'hyperpolarized water' to boost signal intensities in NMR of proteins and nucleic acids. The technique includes four stages: (i) preparation of the biomolecule in partially deuterated buffers, (ii) preparation of 'hyperpolarized' water featuring enhanced 1H NMR signals via cryogenic dynamic nuclear polarization, (iii) sudden melting of the cryogenic pellet and dissolution of the protein or nucleic acid in the hyperpolarized water (enabling spontaneous exchanges of protons between water and target) and (iv) recording signal-amplified NMR spectra targeting either labile 1H or neighboring 15N/13C nuclei in the biomolecule. Water in the ensuing experiments is used as a universal 'hyperpolarization' agent, rendering the approach versatile and applicable to any biomolecule possessing labile hydrogens. Thus, questions can be addressed, ranging from protein and RNA folding problems to resolving structure-function relationships of intrinsically disordered proteins to investigating membrane interactions.
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Affiliation(s)
- Christian Hilty
- Chemistry Department, Texas A&M University, College Station, TX, USA.
| | - Dennis Kurzbach
- Faculty of Chemistry, Institute for Biological Chemistry, University of Vienna, Vienna, Austria.
| | - Lucio Frydman
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, Israel.
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11
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Hu J, Kim J, Hilty C. Detection of Protein-Ligand Interactions by 19F Nuclear Magnetic Resonance Using Hyperpolarized Water. J Phys Chem Lett 2022; 13:3819-3823. [PMID: 35465675 PMCID: PMC9088881 DOI: 10.1021/acs.jpclett.2c00448] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
The transfer of nuclear spin hyperpolarization from water to ligand 19F spins results in a transient signal change that is indicative of protein-ligand interaction. The 19F nucleus allows for background-free detection of these signals, which are modulated by polarization transfer via pathways similar to those in a hyperpolarized 1H water LOGSY experiment. Quantification of the apparent heteronuclear cross-relaxation rates is facilitated by a simultaneous dual-channel detection of 1H and 19F signals. Calculated cross-relaxation rates for the 1H-19F transfer step indicate that these rates are sensitive to binding to medium- and large-sized proteins. The heteronuclear observation of hyperpolarization transfer from water may be used to screen protein-ligand interactions in drug discovery and other applications.
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Affiliation(s)
- Jiandu Hu
- Department of Chemistry, Texas A&M University, 3255 TAMU, College Station, TX 77843, USA
| | | | - Christian Hilty
- Department of Chemistry, Texas A&M University, 3255 TAMU, College Station, TX 77843, USA
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12
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Koptyug IV, Stern Q, Jannin S, Elliott SJ. Frozen water NMR lineshape analysis enables absolute polarization quantification. Phys Chem Chem Phys 2022; 24:5956-5964. [PMID: 35195621 DOI: 10.1039/d1cp05127j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Typical magnetic resonance experiments are routinely limited by weak signal responses. In some cases, the low intrinsic sensitivity can be alleviated by the implementation of hyperpolarization technologies. Dissolution-dynamic nuclear polarization offers a means of hyperpolarizing small molecules. Hyperpolarized water is employed in several dynamic nuclear polarization studies, and hence accurate and rapid quantification of the 1H polarization level is of utmost importance. The solid-state nuclear magnetic resonance spectrum of water acquired under dissolution-dynamic nuclear polarization conditions has revealed lineshapes which become asymmetric at high levels of 1H polarization, which is an interesting fundamental problem in itself, but also complicates data interpretation and can prevent correct estimations of polarization levels achieved. In previous studies, attempts to simulate the 1H spectral lineshape of water as a function of the 1H polarization led to significant disagreement with the experimental results. Here we propose and demonstrate that such simulations, and therefore polarization quantification, can be implemented accurately, in particular by taking into account the detector dead time during 1H signal acquisition that can lead to severe spectral distortions. Based on these findings, we employed an echo-based radiofrequency pulse sequence to achieve distortion-free 1H spectra of hyperpolarized water, and adequate simulations of these echo-based spectra were implemented to extract the absolute 1H polarization level from the hyperpolarized water signal only, thus alleviating the need for lengthy and insensitive measurements of thermal equilibrium signals.
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Affiliation(s)
- Igor V Koptyug
- International Tomography Center, SB RAS, 3A Institutskaya St., Novosibirsk, 630090, Russia
| | - Quentin Stern
- Univ. Lyon, CNRS, ENS Lyon, UCBL, Université de Lyon, CRMN UMR 5280, 69100 Villeurbanne, France.
| | - Sami Jannin
- Univ. Lyon, CNRS, ENS Lyon, UCBL, Université de Lyon, CRMN UMR 5280, 69100 Villeurbanne, France.
| | - Stuart J Elliott
- Univ. Lyon, CNRS, ENS Lyon, UCBL, Université de Lyon, CRMN UMR 5280, 69100 Villeurbanne, France.
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13
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Dai D, Wang X, Liu Y, Yang XL, Glaubitz C, Denysenkov V, He X, Prisner T, Mao J. Room-temperature dynamic nuclear polarization enhanced NMR spectroscopy of small biological molecules in water. Nat Commun 2021; 12:6880. [PMID: 34824218 PMCID: PMC8616939 DOI: 10.1038/s41467-021-27067-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 11/01/2021] [Indexed: 11/15/2022] Open
Abstract
Nuclear magnetic resonance (NMR) spectroscopy is a powerful and popular technique for probing the molecular structures, dynamics and chemical properties. However the conventional NMR spectroscopy is bottlenecked by its low sensitivity. Dynamic nuclear polarization (DNP) boosts NMR sensitivity by orders of magnitude and resolves this limitation. In liquid-state this revolutionizing technique has been restricted to a few specific non-biological model molecules in organic solvents. Here we show that the carbon polarization in small biological molecules, including carbohydrates and amino acids, can be enhanced sizably by in situ Overhauser DNP (ODNP) in water at room temperature and at high magnetic field. An observed connection between ODNP 13C enhancement factor and paramagnetic 13C NMR shift has led to the exploration of biologically relevant heterocyclic compound indole. The QM/MM MD simulation underscores the dynamics of intermolecular hydrogen bonds as the driving force for the scalar ODNP in a long-living radical-substrate complex. Our work reconciles results obtained by DNP spectroscopy, paramagnetic NMR and computational chemistry and provides new mechanistic insights into the high-field scalar ODNP.
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Affiliation(s)
- Danhua Dai
- Institute of Physical and Theoretical Chemistry, Goethe University Frankfurt, 60438, Frankfurt am Main, Germany
- Center for Biomolecular Magnetic Resonance, Goethe University Frankfurt, 60438, Frankfurt am Main, Germany
| | - Xianwei Wang
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
- College of Science, Zhejiang University of Technology, Hangzhou, Zhejiang, 310023, China
| | - Yiwei Liu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Xiao-Liang Yang
- Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Clemens Glaubitz
- Center for Biomolecular Magnetic Resonance, Goethe University Frankfurt, 60438, Frankfurt am Main, Germany
- Institute of Biophysical Chemistry, Goethe University Frankfurt, 60438, Frankfurt am Main, Germany
| | - Vasyl Denysenkov
- Institute of Physical and Theoretical Chemistry, Goethe University Frankfurt, 60438, Frankfurt am Main, Germany
- Center for Biomolecular Magnetic Resonance, Goethe University Frankfurt, 60438, Frankfurt am Main, Germany
| | - Xiao He
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China.
- NYU-ECNU Center for Computational Chemistry at NYU Shanghai, Shanghai, 200062, China.
| | - Thomas Prisner
- Institute of Physical and Theoretical Chemistry, Goethe University Frankfurt, 60438, Frankfurt am Main, Germany
- Center for Biomolecular Magnetic Resonance, Goethe University Frankfurt, 60438, Frankfurt am Main, Germany
| | - Jiafei Mao
- Center for Biomolecular Magnetic Resonance, Goethe University Frankfurt, 60438, Frankfurt am Main, Germany.
- Institute of Biophysical Chemistry, Goethe University Frankfurt, 60438, Frankfurt am Main, Germany.
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14
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Pravdivtsev AN, Buntkowsky G, Duckett SB, Koptyug IV, Hövener J. Parahydrogen-Induced Polarization of Amino Acids. Angew Chem Int Ed Engl 2021; 60:23496-23507. [PMID: 33635601 PMCID: PMC8596608 DOI: 10.1002/anie.202100109] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 02/24/2021] [Indexed: 12/13/2022]
Abstract
Nuclear magnetic resonance (NMR) has become a universal method for biochemical and biomedical studies, including metabolomics, proteomics, and magnetic resonance imaging (MRI). By increasing the signal of selected molecules, the hyperpolarization of nuclear spin has expanded the reach of NMR and MRI even further (e.g. hyperpolarized solid-state NMR and metabolic imaging in vivo). Parahydrogen (pH2 ) offers a fast and cost-efficient way to achieve hyperpolarization, and the last decade has seen extensive advances, including the synthesis of new tracers, catalysts, and transfer methods. The portfolio of hyperpolarized molecules now includes amino acids, which are of great interest for many applications. Here, we provide an overview of the current literature and developments in the hyperpolarization of amino acids and peptides.
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Affiliation(s)
- Andrey N. Pravdivtsev
- Section Biomedical ImagingMolecular Imaging North Competence Center (MOIN CC)Department of Radiology and NeuroradiologyUniversity Medical Center Schleswig-Holstein (UKSH)Kiel UniversityAm Botanischen Garten 1424118KielGermany
| | - Gerd Buntkowsky
- Technical University DarmstadtEduard-Zintl-Institute for Inorganic and Physical ChemistryAlarich-Weiss-Strasse 864287DarmstadtGermany
| | - Simon B. Duckett
- Department Center for Hyperpolarization in Magnetic Resonance (CHyM)Department of ChemistryUniversity of York, HeslingtonYorkYO10 5NYUK
| | - Igor V. Koptyug
- International Tomography CenterSB RAS3A Institutskaya st.630090NovosibirskRussia
- Novosibirsk State University2 Pirogova st.630090NovosibirskRussia
| | - Jan‐Bernd Hövener
- Section Biomedical ImagingMolecular Imaging North Competence Center (MOIN CC)Department of Radiology and NeuroradiologyUniversity Medical Center Schleswig-Holstein (UKSH)Kiel UniversityAm Botanischen Garten 1424118KielGermany
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15
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Pravdivtsev AN, Buntkowsky G, Duckett SB, Koptyug IV, Hövener J. Parawasserstoff‐induzierte Polarisation von Aminosäuren. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202100109] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Andrey N. Pravdivtsev
- Section Biomedical Imaging Molecular Imaging North Competence Center (MOIN CC) Department of Radiology and Neuroradiology University Medical Center Schleswig-Holstein (UKSH) Kiel University Am Botanischen Garten 14 24118 Kiel Deutschland
| | - Gerd Buntkowsky
- Technical University Darmstadt Eduard-Zintl-Institute for Inorganic and Physical Chemistry Alarich-Weiss-Straße 8 64287 Darmstadt Deutschland
| | - Simon B. Duckett
- Department Center for Hyperpolarization in Magnetic Resonance (CHyM) Department of Chemistry University of York, Heslington York YO10 5NY Vereinigtes Königreich
| | - Igor V. Koptyug
- International Tomography Center SB RAS 3A Institutskaya st. 630090 Novosibirsk Russland
- Novosibirsk State University 2 Pirogova st. 630090 Novosibirsk Russland
| | - Jan‐Bernd Hövener
- Section Biomedical Imaging Molecular Imaging North Competence Center (MOIN CC) Department of Radiology and Neuroradiology University Medical Center Schleswig-Holstein (UKSH) Kiel University Am Botanischen Garten 14 24118 Kiel Deutschland
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16
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Residue-resolved monitoring of protein hyperpolarization at sub-second time resolution. Commun Chem 2021; 4:147. [PMID: 36697662 PMCID: PMC9814832 DOI: 10.1038/s42004-021-00587-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 10/05/2021] [Indexed: 02/07/2023] Open
Abstract
Signal-enhancement techniques for NMR spectroscopy are important to amplify the weak resonances provided by nuclear spins. Recently, 'hyperpolarization' techniques have been intensively investigated. These provide nuclear spin states far from equilibrium yielding strong signal boosts up to four orders of magnitude. Here we propose a method for real-time NMR of 'hyperpolarized' proteins at residue resolution. The approach is based on dissolution dynamic nuclear polarization (d-DNP), which enables the use of hyperpolarized buffers that selectively boost NMR signals of solvent-exposed protein residues. The resulting spectral sparseness and signal enhancements enable recording of residue-resolved spectra at a 2 Hz sampling rate. Thus, we monitor the hyperpolarization level of different protein residues simultaneously under near-physiological conditions. We aim to address two points: 1) NMR experiments are often performed under conditions that increase sensitivity but are physiologically irrelevant; 2) long signal accumulation impedes fast real-time monitoring. Both limitations are of fundamental relevance to ascertain pharmacological relevance and study protein kinetics.
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17
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Teleanu F, Sadet A, Vasos PR. Symmetry versus entropy: Long-lived states and coherences. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2021; 122:63-75. [PMID: 33632418 DOI: 10.1016/j.pnmrs.2020.12.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 09/28/2020] [Accepted: 12/18/2020] [Indexed: 06/12/2023]
Abstract
In recent years, new molecular symmetry-based approaches for magnetic resonance have been invented. The implications of these discoveries will be significant for molecular imaging via magnetic resonance, in vitro as well as in vivo, for quantum computing and for other fields. Since the initial observation in 2004 in Southampton that effective spin symmetry can be instilled in a molecule during magnetic resonance experiments, spin states that are resilient to relaxation mechanisms have been increasingly used. Most of these states are related to the nuclear singlet in a pair of J-coupled spins. Tailored relaxation rate constants for magnetization became available in molecules of different sizes and structures, as experimental developments broadened the scope of symmetry-adapted spin states. The ensuing access to timescales longer than the classically-attained ones by circa one order of magnitude allows the study of processes such as slow diffusion or slow exchange that were previously beyond reach. Long-lived states formed by differences between populations of singlets and triplets have overcome the limitations imposed by longitudinal relaxation times (T1) by factors up to 40. Long-lived coherences formed by superpositions of singlets and triplets have overcome the limit of classical transverse coherence (T2) by a factor 9. We present here an overview of the development and applications of long-lived states (LLS) and long-lived coherences (LLC's) and considerations on future perspectives.
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Affiliation(s)
- Florin Teleanu
- Extreme Light Infrastructure - Nuclear Physics ELI-NP, Laser Gamma Experiments Department (LGED), "Horia Hulubei" National Institute for Physics and Nuclear Engineering IFIN-HH, 30 Reactorului Street, RO-077125 Bucharest-Măgurele, Romania; College for Advanced Performance Studies, Babeș-Bolyai University, Mihail Kogălniceanu Street 1, Cluj-Napoca, Romania; Interdisciplinary School of Doctoral Studies, University of Bucharest, B-dul Regina Elisabeta, Bucharest, Romania
| | - Aude Sadet
- Extreme Light Infrastructure - Nuclear Physics ELI-NP, Laser Gamma Experiments Department (LGED), "Horia Hulubei" National Institute for Physics and Nuclear Engineering IFIN-HH, 30 Reactorului Street, RO-077125 Bucharest-Măgurele, Romania
| | - Paul R Vasos
- Extreme Light Infrastructure - Nuclear Physics ELI-NP, Laser Gamma Experiments Department (LGED), "Horia Hulubei" National Institute for Physics and Nuclear Engineering IFIN-HH, 30 Reactorului Street, RO-077125 Bucharest-Măgurele, Romania; Interdisciplinary School of Doctoral Studies, University of Bucharest, B-dul Regina Elisabeta, Bucharest, Romania.
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18
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Hyperpolarization via dissolution dynamic nuclear polarization: new technological and methodological advances. MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2020; 34:5-23. [PMID: 33185800 DOI: 10.1007/s10334-020-00894-w] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 10/04/2020] [Accepted: 10/23/2020] [Indexed: 12/20/2022]
Abstract
Dissolution-DNP is a method to boost liquid-state NMR sensitivity by several orders of magnitude. The technique consists in hyperpolarizing samples by solid-state dynamic nuclear polarization at low temperature and moderate magnetic field, followed by an instantaneous melting and dilution of the sample happening inside the polarizer. Although the technique is well established and the outstanding signal enhancement paved the way towards many applications precluded to conventional NMR, the race to develop new methods allowing higher throughput, faster and higher polarization, and longer exploitation of the signal is still vivid. In this work, we review the most recent advances on dissolution-DNP methods trying to overcome the original technique's shortcomings. The review describes some of the new approaches in the field, first, in terms of sample formulation and properties, and second, in terms of instrumentation.
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19
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Nishimura K, Kouno H, Kawashima Y, Orihashi K, Fujiwara S, Tateishi K, Uesaka T, Kimizuka N, Yanai N. Materials chemistry of triplet dynamic nuclear polarization. Chem Commun (Camb) 2020; 56:7217-7232. [PMID: 32495753 DOI: 10.1039/d0cc02258f] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Dynamic nuclear polarization with photo-excited triplet electrons (triplet-DNP) has the potential to enhance the sensitivity of nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI) at a moderate temperature. While many efforts have been devoted to achieving a large nuclear polarization based on triplet-DNP, the application of triplet-DNP has been limited to nuclear physics experiments. The recent introduction of materials chemistry into the field of triplet-DNP has achieved air-stable and water-soluble polarizing agents as well as the hyperpolarization of nanomaterials with a large surface area such as nanoporous metal-organic frameworks (MOFs) and nanocrystal dispersion in water. This Feature Article overviews the recently-emerged materials chemistry of triplet-DNP that paves new paths towards unprecedented biological and medical applications.
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Affiliation(s)
- Koki Nishimura
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Center for Molecular Systems (CMS), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan.
| | - Hironori Kouno
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Center for Molecular Systems (CMS), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan.
| | - Yusuke Kawashima
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Center for Molecular Systems (CMS), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan.
| | - Kana Orihashi
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Center for Molecular Systems (CMS), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan.
| | - Saiya Fujiwara
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Center for Molecular Systems (CMS), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan.
| | - Kenichiro Tateishi
- Cluster for Pioneering Research, RIKEN, RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Tomohiro Uesaka
- Cluster for Pioneering Research, RIKEN, RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Nobuo Kimizuka
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Center for Molecular Systems (CMS), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan.
| | - Nobuhiro Yanai
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Center for Molecular Systems (CMS), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan. and PRESTO, JST, Honcho 4-1-8, Kawaguchi, Saitama 332-0012, Japan
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20
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Szekely O, Olsen GL, Novakovic M, Rosenzweig R, Frydman L. Assessing Site-Specific Enhancements Imparted by Hyperpolarized Water in Folded and Unfolded Proteins by 2D HMQC NMR. J Am Chem Soc 2020; 142:9267-9284. [PMID: 32338002 PMCID: PMC7304870 DOI: 10.1021/jacs.0c00807] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
![]()
Hyperpolarized water
can be a valuable aid in protein NMR, leading
to amide group 1H polarizations that are orders of magnitude
larger than their thermal counterparts. Suitable procedures can exploit
this to deliver 2D 1H–15N correlations
with good resolution and enhanced sensitivity. These enhancements
depend on the exchange rates between the amides and the water, thereby
yielding diagnostic information about solvent accessibility. This
study applied this “HyperW” method to four proteins
exhibiting a gamut of exchange behaviors: PhoA(350–471), an unfolded 122-residue fragment; barstar, a fully folded ribonuclease
inhibitor; R17, a 13.3 kDa system possessing folded and unfolded forms
under slow interconversion; and drkN SH3, a protein domain whose folded
and unfolded forms interchange rapidly and with temperature-dependent
population ratios. For PhoA4(350–471) HyperW sensitivity
enhancements were ≥300×, as expected for an unfolded protein
sequence. Though fully folded, barstar also exhibited substantial
enhancements; these, however, were not uniform and, according to CLEANEX
experiments, reflected the solvent-exposed residues. R17 showed the
expected superposition of ≥100-fold enhancements for its unfolded
form, coexisting with more modest enhancements for their folded counterparts.
Unexpected, however, was the behavior of drkN SH3, for which HyperW
enhanced the unfolded but, surprisingly, enhanced even more certain folded protein sites. These preferential enhancements were
repeatedly and reproducibly observed. A number of explanations—including
three-site exchange magnetization transfers between water and the
unfolded and folded states; cross-correlated relaxation processes
from hyperpolarized “structural” waters and labile side-chain
protons; and the possibility that faster solvent exchange rates characterize
certain folded sites over their unfolded counterparts—are considered
to account for them.
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21
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Pinon AC, Capozzi A, Ardenkjær-Larsen JH. Hyperpolarized water through dissolution dynamic nuclear polarization with UV-generated radicals. Commun Chem 2020; 3:57. [PMID: 36703471 PMCID: PMC9814647 DOI: 10.1038/s42004-020-0301-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 04/09/2020] [Indexed: 01/29/2023] Open
Abstract
In recent years, hyperpolarization of water protons via dissolution Dynamic Nuclear Polarization (dDNP) has attracted increasing interest in the magnetic resonance community. Hyperpolarized water may provide an alternative to Gd-based contrast agents for angiographic and perfusion Magnetic Resonance Imaging (MRI) examinations, and it may report on chemical and biochemical reactions and proton exchange while perfoming Nuclear Magnetic Resonance (NMR) investigations. However, hyperpolarizing water protons is challenging. The main reason is the presence of radicals, required to create the hyperpolarized nuclear spin state. Indeed, the radicals will also be the main source of relaxation during the dissolution and transfer to the NMR or MRI system. In this work, we report water magnetizations otherwise requiring a field of 10,000 T at room temperature on a sample of pure water, by employing dDNP via UV-generated, labile radicals. We demonstrate the potential of our methodology by acquiring a 15N spectrum from natural abundance urea with a single scan, after spontaneous magnetization transfer from water protons to nitrogen nuclei.
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Affiliation(s)
- Arthur C. Pinon
- grid.5170.30000 0001 2181 8870Center for Hyperpolarization in Magnetic Resonance, Department of Health Technology, Technical University of Denmark, Building 349, 2800 Kgs Lyngby, Denmark
| | - Andrea Capozzi
- grid.5170.30000 0001 2181 8870Center for Hyperpolarization in Magnetic Resonance, Department of Health Technology, Technical University of Denmark, Building 349, 2800 Kgs Lyngby, Denmark
| | - Jan Henrik Ardenkjær-Larsen
- grid.5170.30000 0001 2181 8870Center for Hyperpolarization in Magnetic Resonance, Department of Health Technology, Technical University of Denmark, Building 349, 2800 Kgs Lyngby, Denmark
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Mateos B, Sealey‐Cardona M, Balazs K, Konrat J, Staffler G, Konrat R. NMR Characterization of Surface Receptor Protein Interactions in Live Cells Using Methylcellulose Hydrogels. Angew Chem Int Ed Engl 2020; 59:3886-3890. [PMID: 31721390 PMCID: PMC7065066 DOI: 10.1002/anie.201913585] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 11/11/2019] [Indexed: 01/29/2023]
Abstract
Interactions of transmembrane receptors with their extracellular ligands are essential for cellular communication and signaling and are therefore a major focus in drug discovery programs. The transition from in vitro to live cell interaction studies, however, is typically a bottleneck in many drug discovery projects due to the challenge of obtaining atomic-resolution information under near-physiological conditions. Although NMR spectroscopy is ideally suited to overcome this limitation, several experimental impairments are still present. Herein, we propose the use of methylcellulose hydrogels to study extracellular proteins and their interactions with plasma membrane receptors. This approach reduces cell sedimentation, prevents the internalization of membrane receptors, and increases cell survival, while retaining the free tumbling of extracellular proteins.
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Affiliation(s)
- Borja Mateos
- Department of Structural and Computational BiologyMax Perutz LabsVienna Biocenter Campus 51030ViennaAustria
| | - Marco Sealey‐Cardona
- Department of Structural and Computational BiologyMax Perutz LabsVienna Biocenter Campus 51030ViennaAustria
- Present address: Calyxha Biotechnologies GmbHKarl-Farkas-Gasse 221030ViennaAustria
| | | | - Judith Konrat
- Department of Structural and Computational BiologyMax Perutz LabsVienna Biocenter Campus 51030ViennaAustria
| | | | - Robert Konrat
- Department of Structural and Computational BiologyMax Perutz LabsVienna Biocenter Campus 51030ViennaAustria
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23
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Rayner PJ, Richardson PM, Duckett SB. The Detection and Reactivity of Silanols and Silanes Using Hyperpolarized 29 Si Nuclear Magnetic Resonance. Angew Chem Int Ed Engl 2020; 59:2710-2714. [PMID: 31833623 PMCID: PMC7027454 DOI: 10.1002/anie.201915098] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Indexed: 12/02/2022]
Abstract
Silanols and silanes are key precursors and intermediates for the synthesis of silicon-based materials. While their characterization and quantification by 29 Si NMR spectroscopy has received significant attention, it is a technique that is limited by the low natural abundance of 29 Si and its low sensitivity. Here, we describe a method using p-H2 to hyperpolarize 29 Si. The observed signal enhancements, approaching 3000-fold at 11.7 T, would take many days of measurement for comparable results under Boltzmann conditions. The resulting signals were exploited to monitor the rapid reaction of tris(tert-butoxy)silanol with triflic anhydride in a T1 -corrected process that allows for rapid quantification. These results demonstrate a novel route to quantify dynamic processes and intermediates in the synthesis of silicon materials.
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Affiliation(s)
- Peter J. Rayner
- Centre of Hyperpolarisation in Magnetic ResonanceDepartment of ChemistryUniversity of YorkHeslingtonYO10 5DDUK
| | - Peter M. Richardson
- Centre of Hyperpolarisation in Magnetic ResonanceDepartment of ChemistryUniversity of YorkHeslingtonYO10 5DDUK
| | - Simon B. Duckett
- Centre of Hyperpolarisation in Magnetic ResonanceDepartment of ChemistryUniversity of YorkHeslingtonYO10 5DDUK
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24
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Mateos B, Sealey‐Cardona M, Balazs K, Konrat J, Staffler G, Konrat R. NMR Characterization of Surface Receptor Protein Interactions in Live Cells Using Methylcellulose Hydrogels. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201913585] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Borja Mateos
- Department of Structural and Computational Biology Max Perutz Labs Vienna Biocenter Campus 5 1030 Vienna Austria
| | - Marco Sealey‐Cardona
- Department of Structural and Computational Biology Max Perutz Labs Vienna Biocenter Campus 5 1030 Vienna Austria
- Present address: Calyxha Biotechnologies GmbH Karl-Farkas-Gasse 22 1030 Vienna Austria
| | - Katja Balazs
- AFFiRiS AG Karl-Farkas-Gasse 22 1030 Vienna Austria
| | - Judith Konrat
- Department of Structural and Computational Biology Max Perutz Labs Vienna Biocenter Campus 5 1030 Vienna Austria
| | | | - Robert Konrat
- Department of Structural and Computational Biology Max Perutz Labs Vienna Biocenter Campus 5 1030 Vienna Austria
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25
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A 300-fold enhancement of imino nucleic acid resonances by hyperpolarized water provides a new window for probing RNA refolding by 1D and 2D NMR. Proc Natl Acad Sci U S A 2020; 117:2449-2455. [PMID: 31949004 DOI: 10.1073/pnas.1916956117] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
NMR sensitivity-enhancement methods involving hyperpolarized water could be of importance for solution-state biophysical investigations. Hyperpolarized water (HyperW) can enhance the 1H NMR signals of exchangeable sites by orders of magnitude over their thermal counterparts, while providing insight into chemical exchange and solvent accessibility at a site-resolved level. As HyperW's enhancements are achieved by exploiting fast solvent exchanges associated with minimal interscan delays, possibilities for the rapid monitoring of chemical reactions and biomolecular (re)folding are opened. HyperW NMR can also accommodate heteronuclear transfers, facilitating the rapid acquisition of 2-dimensional (2D) 15N-1H NMR correlations, and thereby combining an enhanced spectral resolution with speed and sensitivity. This work demonstrates how these qualities can come together for the study of nucleic acids. HyperW injections were used to target the guanine-sensing riboswitch aptamer domain (GSRapt) of the xpt-pbuX operon in Bacillus subtilis Unlike what had been observed in proteins, where residues benefited of HyperW NMR only if/when sufficiently exposed to water, these enhancements applied to every imino resonance throughout the RNA. The >300-fold enhancements observed in the resulting 1H NMR spectra allowed us to monitor in real time the changes that GSRapt undergoes upon binding hypoxanthine, a high-affinity interaction leading to conformational refolding on a ∼1-s timescale at 36 °C. Structural responses could be identified for several nucleotides by 1-dimensional (1D) imino 1H NMR as well as by 2D HyperW NMR spectra acquired upon simultaneous injection of hyperpolarized water and hypoxanthine. The folding landscape revealed by this HyperW strategy for GSRapt, is briefly discussed.
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26
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Rayner PJ, Richardson PM, Duckett SB. The Detection and Reactivity of Silanols and Silanes Using Hyperpolarized
29
Si Nuclear Magnetic Resonance. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915098] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Peter J. Rayner
- Centre of Hyperpolarisation in Magnetic ResonanceDepartment of ChemistryUniversity of York Heslington YO10 5DD UK
| | - Peter M. Richardson
- Centre of Hyperpolarisation in Magnetic ResonanceDepartment of ChemistryUniversity of York Heslington YO10 5DD UK
| | - Simon B. Duckett
- Centre of Hyperpolarisation in Magnetic ResonanceDepartment of ChemistryUniversity of York Heslington YO10 5DD UK
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27
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Kouno H, Orihashi K, Nishimura K, Kawashima Y, Tateishi K, Uesaka T, Kimizuka N, Yanai N. Triplet dynamic nuclear polarization of crystalline ice using water-soluble polarizing agents. Chem Commun (Camb) 2020; 56:3717-3720. [DOI: 10.1039/d0cc00836b] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The first example of triplet dynamic nuclear polarization of crystalline ice is demonstrated by developing a water-soluble triplet polarizing agent.
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Affiliation(s)
- Hironori Kouno
- Department of Chemistry and Biochemistry
- Graduate School of Engineering
- Center for Molecular Systems (CMS)
- Kyushu University
- Fukuoka 819-0395
| | - Kana Orihashi
- Department of Chemistry and Biochemistry
- Graduate School of Engineering
- Center for Molecular Systems (CMS)
- Kyushu University
- Fukuoka 819-0395
| | - Koki Nishimura
- Department of Chemistry and Biochemistry
- Graduate School of Engineering
- Center for Molecular Systems (CMS)
- Kyushu University
- Fukuoka 819-0395
| | - Yusuke Kawashima
- Department of Chemistry and Biochemistry
- Graduate School of Engineering
- Center for Molecular Systems (CMS)
- Kyushu University
- Fukuoka 819-0395
| | - Kenichiro Tateishi
- Cluster for Pioneering Research
- RIKEN
- RIKEN Nishina Center for Accelerator-Based Science
- Saitama 351-0198
- Japan
| | - Tomohiro Uesaka
- Cluster for Pioneering Research
- RIKEN
- RIKEN Nishina Center for Accelerator-Based Science
- Saitama 351-0198
- Japan
| | - Nobuo Kimizuka
- Department of Chemistry and Biochemistry
- Graduate School of Engineering
- Center for Molecular Systems (CMS)
- Kyushu University
- Fukuoka 819-0395
| | - Nobuhiro Yanai
- Department of Chemistry and Biochemistry
- Graduate School of Engineering
- Center for Molecular Systems (CMS)
- Kyushu University
- Fukuoka 819-0395
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28
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Richardson PM, Iali W, Roy SS, Rayner PJ, Halse ME, Duckett SB. Rapid 13C NMR hyperpolarization delivered from para-hydrogen enables the low concentration detection and quantification of sugars. Chem Sci 2019; 10:10607-10619. [PMID: 32110347 PMCID: PMC7020793 DOI: 10.1039/c9sc03450a] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Accepted: 09/23/2019] [Indexed: 12/16/2022] Open
Abstract
The monosaccharides glucose and fructose are rapidly detected and quantified by 13C NMR in conjunction with the hyperpolarisation method signal amplification by reversible exchange-relay.
Monosaccharides, such as glucose and fructose, are important to life. In this work we highlight how the rapid delivery of improved 13C detectability for sugars by nuclear magnetic resonance (NMR) can be achieved using the para-hydrogen based NMR hyperpolarization method SABRE-Relay (Signal Amplification by Reversible Exchange-Relay). The significant 13C signal enhancements of 250 at a high field of 9.4 T, and 3100 at a low field of 1 T, enable the detection of trace amounts of these materials as well as the quantification of their tautomeric makeup. Using studies on 13C and 2H isotopically labelled agents we demonstrate how hyperpolarization lifetime (T1) values can be extended, and how singlet states with long lifetimes can be created. The precise quantification of d-glucose-13C6-d7 at the millimolar concentration level is shown to be possible within minutes in conjunction with a linear hyperpolarized response as a function of concentration. In addition to the measurements using labelled materials, low concentration detection is also illustrated for millimolar samples with natural abundance 13C where isomeric form quantification can be achieved with a single transient.
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Affiliation(s)
- Peter M Richardson
- The Centre for Hyperpolarisation in Magnetic Resonance , Department of Chemistry , University of York , UK .
| | - Wissam Iali
- The Centre for Hyperpolarisation in Magnetic Resonance , Department of Chemistry , University of York , UK .
| | - Soumya S Roy
- The Centre for Hyperpolarisation in Magnetic Resonance , Department of Chemistry , University of York , UK .
| | - Peter J Rayner
- The Centre for Hyperpolarisation in Magnetic Resonance , Department of Chemistry , University of York , UK .
| | - Meghan E Halse
- The Centre for Hyperpolarisation in Magnetic Resonance , Department of Chemistry , University of York , UK .
| | - Simon B Duckett
- The Centre for Hyperpolarisation in Magnetic Resonance , Department of Chemistry , University of York , UK .
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Kim J, Mandal R, Hilty C. Observation of Fast Two-Dimensional NMR Spectra during Protein Folding Using Polarization Transfer from Hyperpolarized Water. J Phys Chem Lett 2019; 10:5463-5467. [PMID: 31442055 DOI: 10.1021/acs.jpclett.9b02197] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Nuclear spin hyperpolarized water is utilized to obtain protein spectra not only in the folded state but also during the refolding process. Polarization transfer to Ribonuclease Sa through proton exchange and the nuclear Overhauser effect (NOE) results in NMR signal enhancements of amide protons by up to 24-fold. These enhancements enable the measurement of fast two-dimensional NMR spectra on the same time scale as the folding. Resolved amide proton signals corresponding to the folded protein are observed both under folded and refolding conditions, whereby the refolding protein shows smaller transferred signals. Residue-specific evaluation of contributions to the polarization transfer indicates that signals attributed to a relayed intramolecular NOE are not observable in the refolding experiment. These differences are explained by the absence of long-range contacts and faster molecular motions in the unfolded protein. Applications of this method include accessing residue-specific information on structure and dynamics during multistate protein folding.
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Affiliation(s)
- Jihyun Kim
- Chemistry Department , Texas A&M University , 3255 TAMU, College Station , Texas 77843 , United States
| | - Ratnamala Mandal
- Chemistry Department , Texas A&M University , 3255 TAMU, College Station , Texas 77843 , United States
| | - Christian Hilty
- Chemistry Department , Texas A&M University , 3255 TAMU, College Station , Texas 77843 , United States
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30
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Asavei T, Bobeica M, Nastasa V, Manda G, Naftanaila F, Bratu O, Mischianu D, Cernaianu MO, Ghenuche P, Savu D, Stutman D, Tanaka KA, Radu M, Doria D, Vasos PR. Laser-driven radiation: Biomarkers for molecular imaging of high dose-rate effects. Med Phys 2019; 46:e726-e734. [PMID: 31357243 PMCID: PMC6899889 DOI: 10.1002/mp.13741] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 04/11/2019] [Accepted: 07/03/2019] [Indexed: 12/15/2022] Open
Abstract
Recently developed short‐pulsed laser sources garner high dose‐rate beams such as energetic ions and electrons, x rays, and gamma rays. The biological effects of laser‐generated ion beams observed in recent studies are different from those triggered by radiation generated using classical accelerators or sources, and this difference can be used to develop new strategies for cancer radiotherapy. High‐power lasers can now deliver particles in doses of up to several Gy within nanoseconds. The fast interaction of laser‐generated particles with cells alters cell viability via distinct molecular pathways compared to traditional, prolonged radiation exposure. The emerging consensus of recent literature is that the differences are due to the timescales on which reactive molecules are generated and persist, in various forms. Suitable molecular markers have to be adopted to monitor radiation effects, addressing relevant endogenous molecules that are accessible for investigation by noninvasive procedures and enable translation to clinical imaging. High sensitivity has to be attained for imaging molecular biomarkers in cells and in vivo to follow radiation‐induced functional changes. Signal‐enhanced MRI biomarkers enriched with stable magnetic nuclear isotopes can be used to monitor radiation effects, as demonstrated recently by the use of dynamic nuclear polarization (DNP) for biomolecular observations in vivo. In this context, nanoparticles can also be used as radiation enhancers or biomarker carriers. The radiobiology‐relevant features of high dose‐rate secondary radiation generated using high‐power lasers and the importance of noninvasive biomarkers for real‐time monitoring the biological effects of radiation early on during radiation pulse sequences are discussed.
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Affiliation(s)
- Theodor Asavei
- Extreme Light Infrastructure - Nuclear Physics ELI-NP, "Horia Hulubei" National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125, Bucharest-Magurele, Romania
| | - Mariana Bobeica
- Extreme Light Infrastructure - Nuclear Physics ELI-NP, "Horia Hulubei" National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125, Bucharest-Magurele, Romania
| | - Viorel Nastasa
- Extreme Light Infrastructure - Nuclear Physics ELI-NP, "Horia Hulubei" National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125, Bucharest-Magurele, Romania.,National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, RO-077125, Bucharest-Magurele, Romania
| | - Gina Manda
- Cellular and Molecular Medicine Department, "Victor Babes" National Institute of Pathology, 99-101 Splaiul Independentei, Bucharest, 050096, Romania
| | - Florin Naftanaila
- Carol Davila University of Medicine and Pharmacy Bucharest, Dr Carol Davila Central Mil University Emergency Hospital, 88th Mircea Vulcanescu Str, Bucharest, Romania.,Amethyst Radiotherapy Clinic, Dr Odaii 42, Otopeni, Romania
| | - Ovidiu Bratu
- Carol Davila University of Medicine and Pharmacy Bucharest, Dr Carol Davila Central Mil University Emergency Hospital, 88th Mircea Vulcanescu Str, Bucharest, Romania
| | - Dan Mischianu
- Carol Davila University of Medicine and Pharmacy Bucharest, Dr Carol Davila Central Mil University Emergency Hospital, 88th Mircea Vulcanescu Str, Bucharest, Romania
| | - Mihail O Cernaianu
- Extreme Light Infrastructure - Nuclear Physics ELI-NP, "Horia Hulubei" National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125, Bucharest-Magurele, Romania
| | - Petru Ghenuche
- Extreme Light Infrastructure - Nuclear Physics ELI-NP, "Horia Hulubei" National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125, Bucharest-Magurele, Romania
| | - Diana Savu
- Department of Life and Environmental Physics, Horia Hulubei" National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125, Bucharest-Magurele, Romania
| | - Dan Stutman
- Extreme Light Infrastructure - Nuclear Physics ELI-NP, "Horia Hulubei" National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125, Bucharest-Magurele, Romania.,National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, RO-077125, Bucharest-Magurele, Romania.,Johns Hopkins University, 3400 N Charles St, Baltimore, Maryland, 21218, USA
| | - Kazuo A Tanaka
- Extreme Light Infrastructure - Nuclear Physics ELI-NP, "Horia Hulubei" National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125, Bucharest-Magurele, Romania
| | - Mihai Radu
- Department of Life and Environmental Physics, Horia Hulubei" National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125, Bucharest-Magurele, Romania
| | - Domenico Doria
- Extreme Light Infrastructure - Nuclear Physics ELI-NP, "Horia Hulubei" National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125, Bucharest-Magurele, Romania.,Centre for Plasma Physics, School of Mathematics and Physics, Queen's University Belfast, Belfast, BT7 1NN, United Kingdom
| | - Paul R Vasos
- Extreme Light Infrastructure - Nuclear Physics ELI-NP, "Horia Hulubei" National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125, Bucharest-Magurele, Romania.,Research Institute of the University of Bucharest (ICUB), 36-46 B-dul M. Kogalniceanu, RO-050107, Bucharest, Romania
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31
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Nishimura K, Kouno H, Tateishi K, Uesaka T, Ideta K, Kimizuka N, Yanai N. Triplet dynamic nuclear polarization of nanocrystals dispersed in water at room temperature. Phys Chem Chem Phys 2019; 21:16408-16412. [PMID: 31282507 DOI: 10.1039/c9cp03330k] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
While dynamic nuclear polarization using photo-excited triplet electrons (triplet-DNP) can improve the sensitivity of nuclear magnetic resonance at room temperature, it has not been carried out in water. Here, we report the first example of triplet-DNP in water by downsizing the conventional bulk crystals to nanocrystals.
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Affiliation(s)
- Koki Nishimura
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Center for Molecular Systems (CMS), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan.
| | - Hironori Kouno
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Center for Molecular Systems (CMS), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan.
| | - Kenichiro Tateishi
- Cluster for Pioneering Research, Nishina Center for Accelerator-Based Science, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
| | - Tomohiro Uesaka
- Cluster for Pioneering Research, Nishina Center for Accelerator-Based Science, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
| | - Keiko Ideta
- Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
| | - Nobuo Kimizuka
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Center for Molecular Systems (CMS), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan.
| | - Nobuhiro Yanai
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Center for Molecular Systems (CMS), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan. and PRESTO, JST, Honcho 4-1-8, Kawaguchi, Saitama 332-0012, Japan
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32
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Sadet A, Stavarache C, Bacalum M, Radu M, Bodenhausen G, Kurzbach D, Vasos PR. Hyperpolarized Water Enhances Two-Dimensional Proton NMR Correlations: A New Approach for Molecular Interactions. J Am Chem Soc 2019; 141:12448-12452. [PMID: 31368708 DOI: 10.1021/jacs.9b03651] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Protein and peptide interactions are characterized in the liquid state by multidimensional NMR spectroscopy experiments, which can take hours to record. We show that starting from hyperpolarized HDO, two-dimensional (2D) proton correlation maps of a peptide, either free in solution or interacting with liposomes, can be acquired in less than 60 s. In standard 2D NMR spectroscopy without hyperpolarization, the acquisition time required for similar spectral correlations is on the order of hours. This hyperpolarized experiment enables the identification of amino acids featuring solvent-interacting hydrogens and provides fast spectroscopic analysis of peptide conformers. Sensitivity-enhanced 2D proton correlation spectroscopy is a useful and straightforward tool for biochemistry and structural biology, as it does not recur to nitrogen-15 or carbon-13 isotope enrichment.
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Affiliation(s)
- Aude Sadet
- Research Institute of the University of Bucharest (ICUB) , 36-46 B-dul M. Kogalniceanu , RO-050107 Bucharest , Romania.,ELI-NP, Extreme Light Infrastructure - Nuclear Physics , IFIN-HH , 30 Reactorului Street , RO-077125 Bucharest-Magurele , Romania
| | - Cristina Stavarache
- Research Institute of the University of Bucharest (ICUB) , 36-46 B-dul M. Kogalniceanu , RO-050107 Bucharest , Romania.,"C.D. Nenitescu" Centre of Organic Chemistry , 202-B Spl. Independentei , RO-060023 Bucharest , Romania
| | - Mihaela Bacalum
- Department of Life and Environmental Physics , "Horia Hulubei" National Institute for Physics and Nuclear Engineering (IFIN-HH) , 30 Reactorului Street , RO-077125 Bucharest-Magurele , Romania
| | - Mihai Radu
- Department of Life and Environmental Physics , "Horia Hulubei" National Institute for Physics and Nuclear Engineering (IFIN-HH) , 30 Reactorului Street , RO-077125 Bucharest-Magurele , Romania
| | - Geoffrey Bodenhausen
- Laboratoire des Biomolécules, LBM, Département de Chimie , École Normale Supérieure, PSL University, Sorbonne Université, CNRS , 75005 Paris , France
| | - Dennis Kurzbach
- Laboratoire des Biomolécules, LBM, Département de Chimie , École Normale Supérieure, PSL University, Sorbonne Université, CNRS , 75005 Paris , France.,Institute of Biological Chemistry, Faculty of Chemistry , University of Vienna , Währinger Str. 38 , 1090 Vienna , Austria
| | - Paul R Vasos
- Research Institute of the University of Bucharest (ICUB) , 36-46 B-dul M. Kogalniceanu , RO-050107 Bucharest , Romania.,ELI-NP, Extreme Light Infrastructure - Nuclear Physics , IFIN-HH , 30 Reactorului Street , RO-077125 Bucharest-Magurele , Romania
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33
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Ravera E, Takis PG, Fragai M, Parigi G, Luchinat C. NMR Spectroscopy and Metal Ions in Life Sciences. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800875] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Enrico Ravera
- Magnetic Resonance Center (CERM) and Interuniversity Consortium for Magnetic Resonance of Metallo Proteins (CIRMMP); Via L. Sacconi 6 50019 Sesto Fiorentino Italy
- Department of Chemistry “Ugo Schiff”; University of Florence; Via della Lastruccia 3 50019 Sesto Fiorentino Italy
| | - Panteleimon G. Takis
- Giotto Biotech S.R.L.; Via Madonna del Piano 6 50019 Sesto Fiorentino (FI) Italy
| | - Marco Fragai
- Magnetic Resonance Center (CERM) and Interuniversity Consortium for Magnetic Resonance of Metallo Proteins (CIRMMP); Via L. Sacconi 6 50019 Sesto Fiorentino Italy
- Department of Chemistry “Ugo Schiff”; University of Florence; Via della Lastruccia 3 50019 Sesto Fiorentino Italy
| | - Giacomo Parigi
- Magnetic Resonance Center (CERM) and Interuniversity Consortium for Magnetic Resonance of Metallo Proteins (CIRMMP); Via L. Sacconi 6 50019 Sesto Fiorentino Italy
- Department of Chemistry “Ugo Schiff”; University of Florence; Via della Lastruccia 3 50019 Sesto Fiorentino Italy
| | - Claudio Luchinat
- Magnetic Resonance Center (CERM) and Interuniversity Consortium for Magnetic Resonance of Metallo Proteins (CIRMMP); Via L. Sacconi 6 50019 Sesto Fiorentino Italy
- Department of Chemistry “Ugo Schiff”; University of Florence; Via della Lastruccia 3 50019 Sesto Fiorentino Italy
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34
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Zhang G, Hilty C. Applications of dissolution dynamic nuclear polarization in chemistry and biochemistry. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2018; 56:566-582. [PMID: 29602263 DOI: 10.1002/mrc.4735] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Revised: 03/12/2018] [Accepted: 03/19/2018] [Indexed: 05/15/2023]
Abstract
Sensitivity of detection is one of the most limiting aspects when applying NMR spectroscopy to current problems in the molecular sciences. A number of hyperpolarization methods exist for increasing the population difference between nuclear spin Zeeman states and enhance the signal-to-noise ratio by orders of magnitude. Among these methods, dissolution dynamic nuclear polarization (D-DNP) is unique in its capability of providing high spin polarization for many types of molecules in the liquid state. Originally proposed for biomedical applications including in vivo imaging, applications in high resolution NMR spectroscopy are now emerging. These applications are the focus of the present review. Using D-DNP, a small sample aliquot is first hyperpolarized as a frozen solid at low temperature, followed by dissolution into the liquid state. D-DNP extends the capabilities of liquid state NMR spectroscopy towards shorter timescales and enables the study of nonequilibrium processes, such as the kinetics and mechanisms of reactions. It allows the determination of intermolecular interactions, in particular based on spin relaxation parameters. At the same time, a challenge in the application of this hyperpolarization method is that spin polarization is nonrenewable. Substantial effort has been devoted to develop methods for enabling rapid correlation spectroscopy, the measurement of time-dependent signals, and the extension of the observable time window. With these methods, D-DNP has the potential to open new application areas in the chemical and biochemical sciences.
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Affiliation(s)
- Guannan Zhang
- Chemistry Department, Texas A&M University, College Station, TX, 77843, USA
| | - Christian Hilty
- Chemistry Department, Texas A&M University, College Station, TX, 77843, USA
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35
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Harris T, Gamliel A, Uppala S, Nardi-Schreiber A, Sosna J, Gomori JM, Katz-Brull R. Long-lived 15 N Hyperpolarization and Rapid Relaxation as a Potential Basis for Repeated First Pass Perfusion Imaging - Marked Effects of Deuteration and Temperature. Chemphyschem 2018; 19:2148-2152. [PMID: 29679471 DOI: 10.1002/cphc.201800261] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Indexed: 11/09/2022]
Abstract
Deuteration of the exchangeable hydrogens of [15 N2 ]urea was found to prolong the T1 of the 15 N sites to more than 3 min at physiological temperatures. This significant increase in the lifetime of the hyperpolarized state of [15 N2 ]urea, compared to [13 C]urea - a pre-clinically proven perfusion agent, makes [15 N2 ]urea a promising perfusion agent. The molecular parameters that may lead to this profound effect were assessed by investigating small molecules with different molecular structures containing 15 N sites bound to labile protons and determining the hyperpolarized 15 N T1 in H2 O and D2 O. Dissolution in D2 O led to marked prolongation for all of the selected sites. In whole human blood, the T1 of [15 N2 ]urea was shortened. We present a general strategy for exploiting the markedly longer T1 outside the body and the quick decay in blood for performing multiple hyperpolarized perfusion measurements with a single hyperpolarized dose. Improved storage of the generated [15 N2 ]urea polarization prior to the contact with the blood is demonstrated using higher temperatures due to further T1 prolongation.
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Affiliation(s)
- Talia Harris
- Department of Radiology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Ayelet Gamliel
- Department of Radiology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Sivaranjan Uppala
- Department of Radiology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Atara Nardi-Schreiber
- Department of Radiology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Jacob Sosna
- Department of Radiology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - J Moshe Gomori
- Department of Radiology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Rachel Katz-Brull
- Department of Radiology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
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36
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Emondts M, Klankermayer J. Extending the Scope of Parahydrogen-Based Hyperpolarization Methods. Chem 2018. [DOI: 10.1016/j.chempr.2018.05.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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37
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38
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Kovtunov KV, Pokochueva EV, Salnikov OG, Cousin S, Kurzbach D, Vuichoud B, Jannin S, Chekmenev EY, Goodson BM, Barskiy DA, Koptyug IV. Hyperpolarized NMR Spectroscopy: d-DNP, PHIP, and SABRE Techniques. Chem Asian J 2018; 13:10.1002/asia.201800551. [PMID: 29790649 PMCID: PMC6251772 DOI: 10.1002/asia.201800551] [Citation(s) in RCA: 156] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Indexed: 11/10/2022]
Abstract
The intensity of NMR signals can be enhanced by several orders of magnitude by using various techniques for the hyperpolarization of different molecules. Such approaches can overcome the main sensitivity challenges facing modern NMR/magnetic resonance imaging (MRI) techniques, whilst hyperpolarized fluids can also be used in a variety of applications in material science and biomedicine. This Focus Review considers the fundamentals of the preparation of hyperpolarized liquids and gases by using dissolution dynamic nuclear polarization (d-DNP) and parahydrogen-based techniques, such as signal amplification by reversible exchange (SABRE) and parahydrogen-induced polarization (PHIP), in both heterogeneous and homogeneous processes. The various new aspects in the formation and utilization of hyperpolarized fluids, along with the possibility of observing NMR signal enhancement, are described.
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Affiliation(s)
- Kirill V. Kovtunov
- Laboratory of Magnetic Resonance Microimaging, International Tomography Center, SB RAS, 3A Institutskaya St., Novosibirsk 630090 (Russia)
- Novosibirsk State University, 2 Pirogova St., Novosibirsk 630090 (Russia)
| | - Ekaterina V. Pokochueva
- Laboratory of Magnetic Resonance Microimaging, International Tomography Center, SB RAS, 3A Institutskaya St., Novosibirsk 630090 (Russia)
- Novosibirsk State University, 2 Pirogova St., Novosibirsk 630090 (Russia)
| | - Oleg G. Salnikov
- Laboratory of Magnetic Resonance Microimaging, International Tomography Center, SB RAS, 3A Institutskaya St., Novosibirsk 630090 (Russia)
- Novosibirsk State University, 2 Pirogova St., Novosibirsk 630090 (Russia)
| | - Samuel Cousin
- Univ Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institut des Sciences Analytiques, UMR 5280, 5 rue de la Doua, 69100 Villeurbanne, France
| | - Dennis Kurzbach
- Laboratoire des biomolécules, LBM, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Basile Vuichoud
- Univ Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institut des Sciences Analytiques, UMR 5280, 5 rue de la Doua, 69100 Villeurbanne, France
| | - Sami Jannin
- Univ Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institut des Sciences Analytiques, UMR 5280, 5 rue de la Doua, 69100 Villeurbanne, France
| | - Eduard Y. Chekmenev
- Department of Chemistry & Karmanos Cancer Center, Wayne State University, Detroit, 48202, MI, United States
- Russian Academy of Sciences, Moscow, 119991, Russia
| | - Boyd M. Goodson
- Southern Illinois University, Carbondale, IL 62901, United States
| | - Danila A. Barskiy
- Department of Chemistry, University of California at Berkeley, Berkeley, California 94720-3220, United States
| | - Igor V. Koptyug
- Laboratory of Magnetic Resonance Microimaging, International Tomography Center, SB RAS, 3A Institutskaya St., Novosibirsk 630090 (Russia)
- Novosibirsk State University, 2 Pirogova St., Novosibirsk 630090 (Russia)
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39
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Szekely O, Olsen GL, Felli IC, Frydman L. High-Resolution 2D NMR of Disordered Proteins Enhanced by Hyperpolarized Water. Anal Chem 2018. [PMID: 29528228 DOI: 10.1021/acs.analchem.8b00585] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
This study demonstrates the usefulness derived from relying on hyperpolarized water obtained by dissolution DNP, for site-resolved biophysical NMR studies of intrinsically disordered proteins. Thanks to the facile amide-solvent exchange experienced by protons in these proteins, 2D NMR experiments that like HMQC rely on the polarization of the amide protons, can be enhanced using hyperpolarized water by several orders of magnitude over their conventional counterparts. Optimizations of the DNP procedure and of the subsequent injection into the protein sample are necessary to achieve these gains while preserving state-of-the-art resolution; procedures enabling this transfer of the hyperpolarized water and the achievement of foamless hyperpolarized protein solutions are demonstrated. These protocols are employed to collect 2D 15N-1H HMQC NMR spectra of α-synuclein, showing residue-specific enhancements ≥100× over their thermal counterparts. These enhancements, however, vary considerably throughout the residues. The biophysics underlying this residue-specific behavior upon injection of hyperpolarized water is theoretically examined, the information that it carries is compared with results arising from alternative methods, and its overall potential is discussed.
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Affiliation(s)
- Or Szekely
- Department of Chemical and Biological Physics , The Weizmann Institute of Science , 234 Herzl Street , Rehovot 760001 , Israel
| | - Gregory Lars Olsen
- Department of Chemical and Biological Physics , The Weizmann Institute of Science , 234 Herzl Street , Rehovot 760001 , Israel
| | - Isabella C Felli
- Magnetic Resonance Center (CERM) and Department of Chemistry "Ugo Schiff" , University of Florence , via Luigi Sacconi 6 , Sesto Fiorentino 50019 , Italy
| | - Lucio Frydman
- Department of Chemical and Biological Physics , The Weizmann Institute of Science , 234 Herzl Street , Rehovot 760001 , Israel
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40
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Lipsø KW, Hansen ESS, Tougaard RS, Laustsen C, Ardenkjaer-Larsen JH. Dynamic coronary MR angiography in a pig model with hyperpolarized water. Magn Reson Med 2018; 80:1165-1169. [PMID: 29327374 DOI: 10.1002/mrm.27088] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Revised: 12/05/2017] [Accepted: 12/22/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Kasper Wigh Lipsø
- Department of Electrical Engineering, Technical University of Denmark, Kgs., Lyngby, Denmark
| | - Esben Søvsø Szocska Hansen
- Department of Clinical Medicine, MR Research Centre, Aarhus University, Aarhus, Denmark.,Danish Diabetes Academy, Odense, Denmark
| | - Rasmus Stilling Tougaard
- Department of Clinical Medicine, MR Research Centre, Aarhus University, Aarhus, Denmark.,Department of Cardiology Research, Aarhus University Hospital, Aarhus, Denmark
| | - Christoffer Laustsen
- Department of Clinical Medicine, MR Research Centre, Aarhus University, Aarhus, Denmark
| | - Jan Henrik Ardenkjaer-Larsen
- Department of Electrical Engineering, Technical University of Denmark, Kgs., Lyngby, Denmark.,GE Healthcare, Brøndby, Denmark
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In-Vitro Dissolution Dynamic Nuclear Polarization for Sensitivity Enhancement of NMR with Biological Molecules. METHODS IN MOLECULAR BIOLOGY (CLIFTON, N.J.) 2017; 1688:155-168. [PMID: 29151209 DOI: 10.1007/978-1-4939-7386-6_8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Dissolution dynamic nuclear polarization (D-DNP) is a technique to prepare hyperpolarized nuclear spin states, yielding a signal enhancement of several orders of magnitude for liquid-state NMR. Here, we describe experimental procedures for the application of D-DNP in high-resolution NMR of biochemical compounds, to determine the time evolution of biochemical processes and intermolecular interactions.
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Nardi-Schreiber A, Gamliel A, Harris T, Sapir G, Sosna J, Gomori JM, Katz-Brull R. Biochemical phosphates observed using hyperpolarized 31P in physiological aqueous solutions. Nat Commun 2017; 8:341. [PMID: 28839124 PMCID: PMC5570947 DOI: 10.1038/s41467-017-00364-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Accepted: 06/24/2017] [Indexed: 11/11/2022] Open
Abstract
The dissolution-dynamic nuclear polarization technology had previously enabled nuclear magnetic resonance detection of various nuclei in a hyperpolarized state. Here, we show the hyperpolarization of 31P nuclei in important biological phosphates (inorganic phosphate and phosphocreatine) in aqueous solutions. The hyperpolarized inorganic phosphate showed an enhancement factor >11,000 (at 5.8 T, 9.3% polarization) in D2O (T1 29.4 s). Deuteration and the solution composition and pH all affected the lifetime of the hyperpolarized state. This capability opens up avenues for real-time monitoring of phosphate metabolism, distribution, and pH sensing in the live body without ionizing radiation. Immediate changes in the microenvironment pH have been detected here in a cell-free system via the chemical shift of hyperpolarized inorganic phosphate. Because the 31P nucleus is 100% naturally abundant, future studies on hyperpolarized phosphates will not require expensive isotope labeling as is usually required for hyperpolarization of other substrates. Real-time monitoring of phosphate metabolism and distribution in the live body without ionizing radiation is highly desirable. Here, the authors show dissolution-dynamic nuclear polarization technology can enable nuclear magnetic resonance detection of hyperpolarized 31P of important biological phosphates in aqueous solutions.
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Affiliation(s)
- Atara Nardi-Schreiber
- Department of Radiology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Ayelet Gamliel
- Department of Radiology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Talia Harris
- Department of Radiology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Gal Sapir
- Department of Radiology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Jacob Sosna
- Department of Radiology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - J Moshe Gomori
- Department of Radiology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Rachel Katz-Brull
- Department of Radiology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel.
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Lehmkuhl S, Emondts M, Schubert L, Spannring P, Klankermayer J, Blümich B, Schleker PPM. Hyperpolarizing Water with Parahydrogen. Chemphyschem 2017; 18:2426-2429. [DOI: 10.1002/cphc.201700750] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Sören Lehmkuhl
- ITMC.MC; RWTH Aachen University; Worringerweg 2 52074 Aachen Germany
| | - Meike Emondts
- ITMC.MC; RWTH Aachen University; Worringerweg 2 52074 Aachen Germany
| | - Lukas Schubert
- ITMC.MC; RWTH Aachen University; Worringerweg 2 52074 Aachen Germany
| | - Peter Spannring
- ITMC.MC; RWTH Aachen University; Worringerweg 2 52074 Aachen Germany
| | | | - Bernhard Blümich
- ITMC.MC; RWTH Aachen University; Worringerweg 2 52074 Aachen Germany
| | - P. Philipp M. Schleker
- ITMC.MC; RWTH Aachen University; Worringerweg 2 52074 Aachen Germany
- Max-Planck-Institut für Chemische Energiekonversion; Stiftstr. 34-36 45470 Mülheim an der Ruhr Germany
- Institut für Energie und Klimaforschung (IEK-9); Forschungszentrum Jülich GmbH; 52425 Jülich Germany
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44
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Kim J, Liu M, Hilty C. Modeling of Polarization Transfer Kinetics in Protein Hydration Using Hyperpolarized Water. J Phys Chem B 2017; 121:6492-6498. [PMID: 28613875 DOI: 10.1021/acs.jpcb.7b03052] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Water-protein interactions play a central role in protein structure, dynamics, and function. These interactions, traditionally, have been studied using nuclear magnetic resonance (NMR) by measuring chemical exchange and nuclear Overhauser effect (NOE). Polarization transferred from hyperpolarized water can result in substantial transient signal enhancements of protein resonances due to these processes. Here, we use dissolution dynamic nuclear polarization and flow-NMR for measuring the pH dependence of transferred signals to the protein trypsin. A maximum enhancement of 20 is visible in the amide proton region of the spectrum at pH 6.0, and of 47 at pH 7.5. The aliphatic region is enhanced up to 2.3 times at pH 6.0 and up to 2.5 times at pH 7.5. The time dependence of these observed signals can be modeled quantitatively using rate equations incorporating chemical exchange to amide sites and, optionally, intramolecular NOE to aliphatic protons. On the basis of these two- and three-site models, average exchange (kex) and cross-relaxation rates (σ) obtained were kex = 12 s-1, σ = -0.33 s-1 for pH 7.5 and kex = 1.8 s-1, σ = -0.72 s-1 for pH 6.0 at a temperature of 304 K. These values were validated using conventional EXSY and NOESY measurements. In general, a rapid measurement of exchange and cross-relaxation rates may be of interest for the study of structural changes of the protein occurring on the same time scale. Besides protein-water interactions, interactions with cosolvent or solutes can further be investigated using the same methods.
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Affiliation(s)
- Jihyun Kim
- Chemistry Department, Texas A&M University , 3255 TAMU, College Station, Texas 77843, United States
| | - Mengxiao Liu
- Chemistry Department, Texas A&M University , 3255 TAMU, College Station, Texas 77843, United States
| | - Christian Hilty
- Chemistry Department, Texas A&M University , 3255 TAMU, College Station, Texas 77843, United States
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Martinho RP, Novakovic M, Olsen GL, Frydman L. Heteronuclear 1D and 2D NMR Resonances Detected by Chemical Exchange Saturation Transfer to Water. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ricardo P. Martinho
- Department of Chemical Physics Weizmann Institute of Sciences 76100 Rehovot Israel
| | - Mihajlo Novakovic
- Department of Chemical Physics Weizmann Institute of Sciences 76100 Rehovot Israel
| | - Gregory L. Olsen
- Department of Chemical Physics Weizmann Institute of Sciences 76100 Rehovot Israel
| | - Lucio Frydman
- Department of Chemical Physics Weizmann Institute of Sciences 76100 Rehovot Israel
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46
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Martinho RP, Novakovic M, Olsen GL, Frydman L. Heteronuclear 1D and 2D NMR Resonances Detected by Chemical Exchange Saturation Transfer to Water. Angew Chem Int Ed Engl 2017; 56:3521-3525. [PMID: 28240443 DOI: 10.1002/anie.201611733] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Indexed: 12/31/2022]
Abstract
A method to detect NMR spectra from heteronuclei through the modulation that they impose on a water resonance is exemplified. The approach exploits chemical exchange saturation transfers, which can magnify the signal of labile protons through their influence on a water peak. To impose a heteronuclear modulation on water, an HMQC-type sequence was combined with the FLEX approach. 1D 15 N NMR spectra of exchanging sites could thus be detected, with about tenfold amplifications over the 15 N modulations afforded by conventionally detected HMQC NMR spectroscopy. Extensions of this approach enable 2D heteronuclear acquisitions on directly bonded 1 H-15 N spin pairs, also with significant signal amplification. Despite the interesting limits of detection that these signal enhancements could open in NMR spectroscopy, these gains are constrained by the rates of solvent exchange of the targeted heteronuclear pairs, as well as by spectrometer instabilities affecting the intense water resonances detected in these experiments.
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Affiliation(s)
- Ricardo P Martinho
- Department of Chemical Physics, Weizmann Institute of Sciences, 76100, Rehovot, Israel
| | - Mihajlo Novakovic
- Department of Chemical Physics, Weizmann Institute of Sciences, 76100, Rehovot, Israel
| | - Gregory L Olsen
- Department of Chemical Physics, Weizmann Institute of Sciences, 76100, Rehovot, Israel
| | - Lucio Frydman
- Department of Chemical Physics, Weizmann Institute of Sciences, 76100, Rehovot, Israel
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Kurzbach D, Canet E, Flamm AG, Jhajharia A, Weber EMM, Konrat R, Bodenhausen G. Investigation of Intrinsically Disordered Proteins through Exchange with Hyperpolarized Water. Angew Chem Int Ed Engl 2017; 56:389-392. [PMID: 27918140 DOI: 10.1002/anie.201608903] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Indexed: 01/13/2023]
Abstract
Hyperpolarized water can selectively enhance NMR signals of rapidly exchanging protons in osteopontin (OPN), a metastasis-associated intrinsically disordered protein (IDP), at near-physiological pH and temperature. The transfer of magnetization from hyperpolarized water is limited to solvent-exposed residues and therefore selectively enhances signals in 1 H-15 N correlation spectra. Binding to the polysaccharide heparin was found to induce the unfolding of preformed structural elements in OPN.
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Affiliation(s)
- Dennis Kurzbach
- Departement de Chimie, Ecole Normale Supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Laboratoire des Biomolécules (LBM), 24 rue Lhomond, 75005, Paris, France
- Sorbonne Universites, UPMC Univ Paris 06, Ecole Normale Supérieure, CNRS, Laboratoire des Biomolécules (LBM), Paris, France
| | - Estel Canet
- Departement de Chimie, Ecole Normale Supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Laboratoire des Biomolécules (LBM), 24 rue Lhomond, 75005, Paris, France
- Sorbonne Universites, UPMC Univ Paris 06, Ecole Normale Supérieure, CNRS, Laboratoire des Biomolécules (LBM), Paris, France
| | - Andrea G Flamm
- Department of Structural and Computational Biology, Max F. Perutz Laboratories, University of Vienna, Vienna BioCenter Campus 5, 1030, Vienna, Austria
| | - Aditya Jhajharia
- Departement de Chimie, Ecole Normale Supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Laboratoire des Biomolécules (LBM), 24 rue Lhomond, 75005, Paris, France
- Sorbonne Universites, UPMC Univ Paris 06, Ecole Normale Supérieure, CNRS, Laboratoire des Biomolécules (LBM), Paris, France
| | - Emmanuelle M M Weber
- Departement de Chimie, Ecole Normale Supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Laboratoire des Biomolécules (LBM), 24 rue Lhomond, 75005, Paris, France
- Sorbonne Universites, UPMC Univ Paris 06, Ecole Normale Supérieure, CNRS, Laboratoire des Biomolécules (LBM), Paris, France
| | - Robert Konrat
- Department of Structural and Computational Biology, Max F. Perutz Laboratories, University of Vienna, Vienna BioCenter Campus 5, 1030, Vienna, Austria
| | - Geoffrey Bodenhausen
- Departement de Chimie, Ecole Normale Supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Laboratoire des Biomolécules (LBM), 24 rue Lhomond, 75005, Paris, France
- Sorbonne Universites, UPMC Univ Paris 06, Ecole Normale Supérieure, CNRS, Laboratoire des Biomolécules (LBM), Paris, France
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Lipsø KW, Bowen S, Rybalko O, Ardenkjær-Larsen JH. Large dose hyperpolarized water with dissolution-DNP at high magnetic field. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2017; 274:65-72. [PMID: 27889650 DOI: 10.1016/j.jmr.2016.11.008] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 11/15/2016] [Accepted: 11/17/2016] [Indexed: 05/25/2023]
Abstract
We demonstrate a method for the preparation of hyperpolarized water by dissolution Dynamic Nuclear Polarization at high magnetic field. Protons were polarized at 6.7T and 1.1K to >70% with frequency modulated microwave irradiation at 188GHz. 97.2±0.7% of the radical was extracted from the sample in the dissolution in a two-phase system. 16±1mL of 5.0M 1H in D2O with a polarization of 13.0±0.9% in the liquid state was obtained, corresponding to an enhancement factor of 4000±300 compared to the thermal equilibrium at 9.4T and 293K. A longitudinal relaxation time constant of 16±1s was measured. The sample was polarized and dissolved in a fluid path compatible with clinical polarizers. The volume of hyperpolarized water produced by this method enables angiography and perfusion measurements in large animals, as well as NMR experiments for studies of e.g. proton exchange and polarization transfer to other nuclei.
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Affiliation(s)
- Kasper Wigh Lipsø
- Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Sean Bowen
- Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Oleksandr Rybalko
- Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Jan Henrik Ardenkjær-Larsen
- Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark; GE Healthcare, Brøndby, Denmark.
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Kurzbach D, Canet E, Flamm AG, Jhajharia A, Weber EMM, Konrat R, Bodenhausen G. Untersuchung von intrinsisch unstrukturierten Proteinen mithilfe des Austausches mit hyperpolarisiertem Wasser. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608903] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Dennis Kurzbach
- Departement de Chimie Ecole Normale Supérieure, PSL Research University UPMC Univ Paris 06, CNRS Laboratoire des Biomolécules (LBM) 24 rue Lhomond 75005 Paris Frankreich
- Sorbonne Universites, UPMC Univ Paris 06 Ecole Normale Supérieure CNRS, Laboratoire des Biomolécules (LBM) Paris Frankreich
| | - Estel Canet
- Departement de Chimie Ecole Normale Supérieure, PSL Research University UPMC Univ Paris 06, CNRS Laboratoire des Biomolécules (LBM) 24 rue Lhomond 75005 Paris Frankreich
- Sorbonne Universites, UPMC Univ Paris 06 Ecole Normale Supérieure CNRS, Laboratoire des Biomolécules (LBM) Paris Frankreich
| | - Andrea G. Flamm
- Department of Structural and Computational Biology Max F. Perutz Laboratories Universität Wien Vienna BioCenter 5 1030 Wien Österreich
| | - Aditya Jhajharia
- Departement de Chimie Ecole Normale Supérieure, PSL Research University UPMC Univ Paris 06, CNRS Laboratoire des Biomolécules (LBM) 24 rue Lhomond 75005 Paris Frankreich
- Sorbonne Universites, UPMC Univ Paris 06 Ecole Normale Supérieure CNRS, Laboratoire des Biomolécules (LBM) Paris Frankreich
| | - Emmanuelle M. M. Weber
- Departement de Chimie Ecole Normale Supérieure, PSL Research University UPMC Univ Paris 06, CNRS Laboratoire des Biomolécules (LBM) 24 rue Lhomond 75005 Paris Frankreich
- Sorbonne Universites, UPMC Univ Paris 06 Ecole Normale Supérieure CNRS, Laboratoire des Biomolécules (LBM) Paris Frankreich
| | - Robert Konrat
- Department of Structural and Computational Biology Max F. Perutz Laboratories Universität Wien Vienna BioCenter 5 1030 Wien Österreich
| | - Geoffrey Bodenhausen
- Departement de Chimie Ecole Normale Supérieure, PSL Research University UPMC Univ Paris 06, CNRS Laboratoire des Biomolécules (LBM) 24 rue Lhomond 75005 Paris Frankreich
- Sorbonne Universites, UPMC Univ Paris 06 Ecole Normale Supérieure CNRS, Laboratoire des Biomolécules (LBM) Paris Frankreich
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50
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Wigh Lipsø K, Hansen ESS, Tougaard RS, Laustsen C, Ardenkjaer-Larsen JH. Renal MR angiography and perfusion in the pig using hyperpolarized water. Magn Reson Med 2016; 78:1131-1135. [DOI: 10.1002/mrm.26478] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 08/08/2016] [Accepted: 09/01/2016] [Indexed: 01/20/2023]
Affiliation(s)
- Kasper Wigh Lipsø
- Department of Electrical Engineering; Technical University of Denmark; Kgs Lyngby Denmark
| | - Esben Søvsø Szocska Hansen
- Department of Clinical Medicine, MR Research Centre; Aarhus University; Aarhus Denmark
- Danish Diabetes Academy; Odense Denmark
| | - Rasmus Stilling Tougaard
- Department of Clinical Medicine, MR Research Centre; Aarhus University; Aarhus Denmark
- Department of Cardiology - Research; Aarhus University Hospital; Aarhus Denmark
| | - Christoffer Laustsen
- Department of Clinical Medicine, MR Research Centre; Aarhus University; Aarhus Denmark
| | - Jan Henrik Ardenkjaer-Larsen
- Department of Electrical Engineering; Technical University of Denmark; Kgs Lyngby Denmark
- GE Healthcare; Brøndby Denmark
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