1
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Astani EK, Iravani H, Sardari S. Theoretical investigation of the effects of diverse hydrogen-bonding characteristics on the 17O chemical shielding and electric field gradient tensors within the active sites of MraY AA bound to nucleoside antibiotics capuramycin, carbacaprazamycin, 3'-Hydroxymureidomycin A, and muraymycin D2. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2024; 133:101960. [PMID: 39208660 DOI: 10.1016/j.ssnmr.2024.101960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Revised: 07/31/2024] [Accepted: 08/20/2024] [Indexed: 09/04/2024]
Abstract
This study builds upon our prior researches and seeks to investigate and clarify the influences of various characteristics of hydrogen bonds (H-bonds) and charge transfer (CT) interactions, which were detected within the inhibitor binding pockets (labeled as the QM models I-IV) of MraYAA-capuramycin, MraYAA-carbacaprazamycin, MraYAA-3'-hydroxymureidomycin A, and MraYAA-muraymycin D2 complexes by QTAIM and NBO analyses from DFT QM/MM MD calculations, on the 17O chemical shielding (CS) and electric field gradient (EFG) tensors of carboxylate (Oδ), carbonyl (C═O), and hydroxyl (O-H) oxygens in these models. The 17O CS and EFG tensors of these three types of oxygens in QM models I-IV were calculated at the M06-2X/6-31G** level by including the solvent effects using the polarizable continuum model. From the computed 17O CS and EFG tensors in these models, it was found that the nuclear shielding, σiso, for carboxylate or carbonyl oxygen increases (shielding effect) as the H-bond length decreases and the percentage p-character of nOδ/nC═O lone pair partner in the CT interaction enhances. In contrast, the σiso (17O-H) decreases (deshielding effect) with a reduction in the H-bond length as well as with an enhancement in percentage s-character of the nOH lone pair/σ*O-H antibond. By reducing the H-bond length or by increasing p-character of the nOδ/nC═O lone pair, the 17Oδ/17O═C quadrupole coupling constant smoothly decreases, while the 17Oδ/17O═C asymmetry parameter smoothly increases. Moreover, these calculated parameters are in a good agreement with the experimental values. The information garnered here is valuable particularly for further understanding of empirical correlations between 17O NMR spectroscopic and H-bonding characteristics in the protein-ligand complexes.
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Affiliation(s)
- Elahe K Astani
- Drug Design and Bioinformatics Unit, Medical Biotechnology Department, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, 13169-43551, Iran; Department of Chemistry, Faculty of Science, Tarbiat Modares University, Tehran, 14115-175, Iran.
| | - Hossein Iravani
- Department of Chemistry, Faculty of Science, Tarbiat Modares University, Tehran, 14115-175, Iran
| | - Soroush Sardari
- Drug Design and Bioinformatics Unit, Medical Biotechnology Department, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, 13169-43551, Iran
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2
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Wu G, Dai Y, Hung I, Gan Z, Terskikh V. 1H/ 17O Chemical Shift Waves in Carboxyl-Bridged Hydrogen Bond Networks in Organic Solids. J Phys Chem A 2024; 128:4288-4296. [PMID: 38748612 DOI: 10.1021/acs.jpca.4c01866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
Abstract
We report solid-state 1H and 17O NMR results for four 17O-labeled organic compounds each containing an extensive carboxyl-bridged hydrogen bond (CBHB) network in the crystal lattice: tetrabutylammonium hydrogen di-[17O2]salicylate (1), [17O4]quinolinic acid (2), [17O4]dinicotinic acid (3), and [17O2]Gly/[17O2]Gly·HCl cocrystal (4). The 1H isotropic chemical shifts found for protons involved in different CBHB networks are between 8.2 and 20.5 ppm, which reflect very different hydrogen-bonding environments. Similarly, the 17O isotropic chemical shifts found for the carboxylate oxygen atoms in CBHB networks, spanning a large range between 166 and 341 ppm, are also remarkably sensitive to the hydrogen-bonding environments. We introduced a simple graphical representation in which 1H and 17O chemical shifts are displayed along the H and O atomic chains that form the CBHB network. In such a depiction, because wavy patterns are often observed, we refer to these wavy patterns as 1H/17O chemical shift waves. Typical patterns of 1H/17O chemical shift waves in CBHB networks are discussed. The reported 1H and 17O NMR parameters for the CBHB network models examined in this study can serve as benchmarks to aid in spectral interpretation for CBHB networks in proteins.
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Affiliation(s)
- Gang Wu
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston Ontario K7L 3N6, Canada
| | - Yizhe Dai
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston Ontario K7L 3N6, Canada
| | - Ivan Hung
- National High Magnetic Field Laboratory, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, United States
| | - Zhehong Gan
- National High Magnetic Field Laboratory, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, United States
| | - Victor Terskikh
- Metrology, National Research Council Canada, Ottawa K1A 0R6, Canada
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3
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Wu G. 17O NMR studies of organic and biological molecules in aqueous solution and in the solid state. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2019; 114-115:135-191. [PMID: 31779879 DOI: 10.1016/j.pnmrs.2019.06.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 06/11/2019] [Accepted: 06/11/2019] [Indexed: 06/10/2023]
Abstract
This review describes the latest developments in the field of 17O NMR spectroscopy of organic and biological molecules both in aqueous solution and in the solid state. In the first part of the review, a general theoretical description of the nuclear quadrupole relaxation process in isotropic liquids is presented at a mathematical level suitable for non-specialists. In addition to the first-order quadrupole interaction, the theory also includes additional relaxation mechanisms such as the second-order quadrupole interaction and its cross correlation with shielding anisotropy. This complete theoretical treatment allows one to assess the transverse relaxation rate (thus the line width) of NMR signals from half-integer quadrupolar nuclei in solution over the entire range of motion. On the basis of this theoretical framework, we discuss general features of quadrupole-central-transition (QCT) NMR, which is a particularly powerful method of studying biomolecules in the slow motion regime. Then we review recent advances in 17O QCT NMR studies of biological macromolecules in aqueous solution. The second part of the review is concerned with solid-state 17O NMR studies of organic and biological molecules. As a sequel to the previous review on the same subject [G. Wu, Prog. Nucl. Magn. Reson. Spectrosc. 52 (2008) 118-169], the current review provides a complete coverage of the literature published since 2008 in this area.
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Affiliation(s)
- Gang Wu
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario K7L 3N6, Canada.
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4
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Martin RW, Kelly JE, Kelz JI. Advances in instrumentation and methodology for solid-state NMR of biological assemblies. J Struct Biol 2018; 206:73-89. [PMID: 30205196 DOI: 10.1016/j.jsb.2018.09.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 07/08/2018] [Accepted: 09/06/2018] [Indexed: 01/11/2023]
Abstract
Many advances in instrumentation and methodology have furthered the use of solid-state NMR as a technique for determining the structures and studying the dynamics of molecules involved in complex biological assemblies. Solid-state NMR does not require large crystals, has no inherent size limit, and with appropriate isotopic labeling schemes, supports solving one component of a complex assembly at a time. It is complementary to cryo-EM, in that it provides local, atomic-level detail that can be modeled into larger-scale structures. This review focuses on the development of high-field MAS instrumentation and methodology; including probe design, benchmarking strategies, labeling schemes, and experiments that enable the use of quadrupolar nuclei in biomolecular NMR. Current challenges facing solid-state NMR of biological assemblies and new directions in this dynamic research area are also discussed.
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Affiliation(s)
- Rachel W Martin
- Department of Chemistry, University of California, Irvine 92697-2025, United States; Department of Molecular Biology and Biochemistry, University of California, Irvine 92697-3900, United States.
| | - John E Kelly
- Department of Chemistry, University of California, Irvine 92697-2025, United States
| | - Jessica I Kelz
- Department of Chemistry, University of California, Irvine 92697-2025, United States
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5
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Kong X, Terskikh V, Toubaei A, Wu G. A solid-state 17O NMR study of platinum-carboxylate complexes: carboplatin and oxaliplatin. CAN J CHEM 2015. [DOI: 10.1139/cjc-2015-0019] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We report synthesis and solid-state NMR characterization of two 17O-labeled platinum anticancer drugs: cis-diammine(1,1-cyclobutane-[17O4]dicarboxylato)platinum(II) (carboplatin) and ([17O4]oxalato)[(1R, 2R)-(−)-1,2-cyclohexanediamine)]platinum(II) (oxaliplatin). Both 17O chemical shift (CS) and quadrupolar coupling (QC) tensors were measured for the carboxylate groups in these two compounds. With the aid of plane wave DFT computations, the 17O CS and QC tensor orientations were determined in the molecular frame of reference. Significant changes in the 17O CS and QC tensors were observed for the carboxylate oxygen atom upon its coordination to Pt(II). In particular, the 17O isotropic chemical shifts for the oxygen atoms directly bonded to Pt(II) are found to be smaller (more shielded) by 200 ppm than those for the non-Pt-coordinated oxygen atoms within the same carboxylate group. Examination of the 17O CS tensor components reveals that such a large 17O coordination shift is primarily due to the shielding increase along the direction that is within the O=C–O–Pt plane and perpendicular to the O–Pt bond. This result is interpreted as due to the σ donation from the oxygen nonbonding orbital (electron lone pair) to the Pt(II) empty dyz orbital, which results in large energy gaps between σ(Pt–O) and unoccupied molecular orbitals, thus reducing the paramagnetic shielding contribution along the direction perpendicular to the O–Pt bond. We found that the 17O QC tensor of the carboxylate oxygen is also sensitive to Pt(II) coordination, and that 17O CS and QC tensors provide complementary information about the O–Pt bonding.
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Affiliation(s)
- Xianqi Kong
- Department of Chemistry, Queen’s University, 90 Bader Lane, Kingston, ON K7L 3N6, Canada
| | - Victor Terskikh
- Department of Chemistry, Queen’s University, 90 Bader Lane, Kingston, ON K7L 3N6, Canada
- Department of Chemistry, University of Ottawa, Ottawa, ON K1N 6N5, Canada
| | - Abouzar Toubaei
- Department of Chemistry, Queen’s University, 90 Bader Lane, Kingston, ON K7L 3N6, Canada
| | - Gang Wu
- Department of Chemistry, Queen’s University, 90 Bader Lane, Kingston, ON K7L 3N6, Canada
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6
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Abstract
Recent applications of solid-state NMR spectroscopy to studies of nucleic acids and their components.
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Affiliation(s)
- Martin Dračínský
- Institute of Organic Chemistry and Biochemistry
- Prague
- Czech Republic
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7
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Theodorou V, Skobridis K, Alivertis D, Gerothanassis IP. Synthetic methodologies in organic chemistry involving incorporation of [¹⁷O] and [¹⁸O] isotopes. J Labelled Comp Radiopharm 2014; 57:481-508. [PMID: 24996002 DOI: 10.1002/jlcr.3212] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Revised: 04/06/2014] [Accepted: 05/15/2014] [Indexed: 11/09/2022]
Abstract
This review is a critical survey of the literature that aims to highlight the most significant developments on synthetic strategies involving stable oxygen isotopes ([(17)O] and [(18)O]). The labeling methodologies are categorized in groups, according to the oxygen-containing functional group.
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Affiliation(s)
- Vassiliki Theodorou
- Section of Organic Chemistry and Biochemistry, Department of Chemistry, University of Ioannina, Ioannina, GR-451 10, Greece
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8
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Umino M, Higashi K, Masu H, Limwikrant W, Yamamoto K, Moribe K. Characterization of Cromolyn Sodium Hydrates and Its Formulation by 23Na-Multiquantum and Magic-Angle Spinning Nuclear Magnetic Resonance Spectroscopy. J Pharm Sci 2013; 102:2738-47. [DOI: 10.1002/jps.23655] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Revised: 06/14/2013] [Accepted: 06/14/2013] [Indexed: 11/10/2022]
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9
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Vogt FG, Yin H, Forcino RG, Wu L. 17O Solid-State NMR as a Sensitive Probe of Hydrogen Bonding in Crystalline and Amorphous Solid Forms of Diflunisal. Mol Pharm 2013; 10:3433-46. [DOI: 10.1021/mp400275w] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Frederick G. Vogt
- Product Development, GlaxoSmithKline plc, 709 Swedeland Rd., King of Prussia,
Pennsylvania 19406, United
States
| | - Hao Yin
- Product Development, GlaxoSmithKline plc, 709 Swedeland Rd., King of Prussia,
Pennsylvania 19406, United
States
| | - Rachel G. Forcino
- Product Development, GlaxoSmithKline plc, 709 Swedeland Rd., King of Prussia,
Pennsylvania 19406, United
States
| | - Lianming Wu
- Product Development, GlaxoSmithKline plc, 709 Swedeland Rd., King of Prussia,
Pennsylvania 19406, United
States
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10
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Kong X, O’Dell LA, Terskikh V, Ye E, Wang R, Wu G. Variable-Temperature 17O NMR Studies Allow Quantitative Evaluation of Molecular Dynamics in Organic Solids. J Am Chem Soc 2012; 134:14609-17. [DOI: 10.1021/ja306227p] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xianqi Kong
- Department of Chemistry, Queen’s University, 90 Bader Lane, Kingston,
Ontario K7L 3N6, Canada
| | - Luke A. O’Dell
- National Research Council Canada, 100 Sussex Drive, Ottawa, Ontario K1A
0R6, Canada
| | - Victor Terskikh
- National Research Council Canada, 100 Sussex Drive, Ottawa, Ontario K1A
0R6, Canada
| | - Eric Ye
- Department of
Chemistry, University of Ottawa, 10 Marie
Curie Private, Ottawa,
Ontario K1N 6N5, Canada
| | - Ruiyao Wang
- Department of Chemistry, Queen’s University, 90 Bader Lane, Kingston,
Ontario K7L 3N6, Canada
| | - Gang Wu
- Department of Chemistry, Queen’s University, 90 Bader Lane, Kingston,
Ontario K7L 3N6, Canada
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11
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O’Dell LA, Ratcliffe CI, Kong X, Wu G. Multinuclear Solid-State Nuclear Magnetic Resonance and Density Functional Theory Characterization of Interaction Tensors in Taurine. J Phys Chem A 2012; 116:1008-14. [DOI: 10.1021/jp210844t] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Luke A. O’Dell
- Steacie Institute for Molecular Sciences, National Research Council, 100
Sussex Drive, Ottawa, Ontario, K1A 0R6, Canada
| | - Christopher I. Ratcliffe
- Steacie Institute for Molecular Sciences, National Research Council, 100
Sussex Drive, Ottawa, Ontario, K1A 0R6, Canada
| | - Xianqi Kong
- Department of Chemistry, Queen’s University, 90 Bader Lane, Kingston,
Ontario, K7L 3N6, Canada
| | - Gang Wu
- Department of Chemistry, Queen’s University, 90 Bader Lane, Kingston,
Ontario, K7L 3N6, Canada
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12
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Zhu J, Lau JYC, Wu G. A solid-state (17)O NMR study of L-tyrosine in different ionization states: implications for probing tyrosine side chains in proteins. J Phys Chem B 2010; 114:11681-8. [PMID: 20712305 DOI: 10.1021/jp1055123] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report experimental characterization of (17)O quadrupole coupling (QC) and chemical shift (CS) tensors for the phenolic oxygen in three l-tyrosine (l-Tyr) compounds: l-Tyr, l-Tyr.HCl, and Na(2)(l-Tyr). This is the first time that these fundamental (17)O NMR tensors are completely determined for phenolic oxygens in different ionization states. We find that, while the (17)O QC tensor changes very little upon phenol ionization, the (17)O CS tensor displays a remarkable sensitivity. In particular, the isotropic (17)O chemical shift increases by approximately 60 ppm upon phenol ionization, which is 6 times larger than the corresponding change in the isotropic (13)C chemical shift for the C(zeta) nucleus of the same phenol group. By examining the CS tensor orientation in the molecular frame of reference, we discover a "cross-over" effect between delta(11) and delta(22) components for both (17)O and (13)C CS tensors. We demonstrate that the knowledge of such "cross-over" effects is crucial for understanding the relationship between the observed CS tensor components and chemical bonding. Our results suggest that solid-state (17)O NMR can potentially be used to probe the ionization state of tyrosine side chains in proteins.
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Affiliation(s)
- Jianfeng Zhu
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario, Canada K7L 3N6
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13
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Zhu J, Wu G. Quadrupole central transition 17O NMR spectroscopy of biological macromolecules in aqueous solution. J Am Chem Soc 2010; 133:920-32. [PMID: 21175170 DOI: 10.1021/ja1079207] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We demonstrate a general nuclear magnetic resonance (NMR) spectroscopic approach in obtaining high-resolution (17)O (spin-5/2) NMR spectra for biological macromolecules in aqueous solution. This approach, termed quadrupole central transition (QCT) NMR, is based on the multiexponential relaxation properties of half-integer quadrupolar nuclei in molecules undergoing slow isotropic tumbling motion. Under such a circumstance, Redfield's relaxation theory predicts that the central transition, m(I) = +1/2 ↔ -1/2, can exhibit relatively long transverse relaxation time constants, thus giving rise to relatively narrow spectral lines. Using three robust protein-ligand complexes of size ranging from 65 to 240 kDa, we have obtained (17)O QCT NMR spectra with unprecedented resolution, allowing the chemical environment around the targeted oxygen atoms to be directly probed for the first time. The new QCT approach increases the size limit of molecular systems previously attainable by solution (17)O NMR by nearly 3 orders of magnitude (1000-fold). We have also shown that, when both quadrupole and shielding anisotropy interactions are operative, (17)O QCT NMR spectra display an analogous transverse relaxation optimized spectroscopy type behavior in that the condition for optimal resolution depends on the applied magnetic field. We conclude that, with the currently available moderate and ultrahigh magnetic fields (14 T and higher), this (17)O QCT NMR approach is applicable to a wide variety of biological macromolecules. The new (17)O NMR parameters so obtained for biological molecules are complementary to those obtained from (1)H, (13)C, and (15)N NMR studies.
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Affiliation(s)
- Jianfeng Zhu
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario, Canada K7L 3N6
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14
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Hajjar R, Millot Y, Man PP. Phase cycling in MQMAS sequences for half-integer quadrupole spins. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2010; 57:306-342. [PMID: 20667403 DOI: 10.1016/j.pnmrs.2010.05.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2010] [Accepted: 05/11/2010] [Indexed: 05/29/2023]
Affiliation(s)
- Redouane Hajjar
- UPMC Univ Paris 06, FRE 3230, Laboratoire RMN des Matériaux Nanoporeux, 4 Place Jussieu, F-75005 Paris, France
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15
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Saitô H, Ando I, Ramamoorthy A. Chemical shift tensor - the heart of NMR: Insights into biological aspects of proteins. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2010; 57:181-228. [PMID: 20633363 PMCID: PMC2905606 DOI: 10.1016/j.pnmrs.2010.04.005] [Citation(s) in RCA: 136] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2010] [Accepted: 04/26/2010] [Indexed: 05/19/2023]
Affiliation(s)
- Hazime Saitô
- Department of Life Science, Himeji Institute of Technology, University of Hyogo, Kamigori, Hyog, 678-1297, Japan
| | - Isao Ando
- Department of Chemistry and Materials Science, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo, 152-0033, Japan
| | - Ayyalusamy Ramamoorthy
- Biophysics and Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, MI 48109-1055, USA
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16
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Gerothanassis IP. Oxygen-17 NMR spectroscopy: basic principles and applications (part I). PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2010; 56:95-197. [PMID: 20633350 DOI: 10.1016/j.pnmrs.2009.09.002] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2009] [Accepted: 09/24/2009] [Indexed: 05/29/2023]
Affiliation(s)
- Ioannis P Gerothanassis
- Section of Organic Chemistry and Biochemistry, Department of Chemistry, University of Ioannina, Ioannina GR-451 10, Greece.
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17
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Seyfried MS, Lauber BS, Luedtke NW. Multiple-turnover isotopic labeling of Fmoc- and Boc-protected amino acids with oxygen isotopes. Org Lett 2010; 12:104-6. [PMID: 20035564 DOI: 10.1021/ol902519g] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An efficient method for the selective isotopic labeling of carboxylic acids is reported. By reacting an amino acid with excess carbodiimide and (18)OH(2), a kinetically enhanced multiple turnover reaction provides the (18)O-labeled product in high yield and excellent isotopic enrichment. This reaction is fully compatible with standard Fmoc, Boc, Trt, and OtBu protecting groups and provides a means to selectively label the alpha-carboxylic acids of functionalized amino acids with stable oxygen isotopes.
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Affiliation(s)
- Martin S Seyfried
- Institute of Organic Chemistry, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
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18
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Lee SK, Deschamps M, Hiet J, Massiot D, Park SY. Connectivity and Proximity between Quadrupolar Nuclides in Oxide Glasses: Insights from through-Bond and through-Space Correlations in Solid-State NMR. J Phys Chem B 2009; 113:5162-7. [DOI: 10.1021/jp810667e] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sung Keun Lee
- School of Earth and Environmental Sciences, Seoul National University, Seoul, 151-742 Korea, CNRS, UPR3079 CEMHTI, 1D avenue de la Recherche Scientifique, 45071 Orléans cedex 2, France, and Faculté des Sciences, Université d’Orléans, Avenue du Parc Floral, BP 6749, 45067 Orléans cedex 2, France
| | - Michael Deschamps
- School of Earth and Environmental Sciences, Seoul National University, Seoul, 151-742 Korea, CNRS, UPR3079 CEMHTI, 1D avenue de la Recherche Scientifique, 45071 Orléans cedex 2, France, and Faculté des Sciences, Université d’Orléans, Avenue du Parc Floral, BP 6749, 45067 Orléans cedex 2, France
| | - Julien Hiet
- School of Earth and Environmental Sciences, Seoul National University, Seoul, 151-742 Korea, CNRS, UPR3079 CEMHTI, 1D avenue de la Recherche Scientifique, 45071 Orléans cedex 2, France, and Faculté des Sciences, Université d’Orléans, Avenue du Parc Floral, BP 6749, 45067 Orléans cedex 2, France
| | - Dominique Massiot
- School of Earth and Environmental Sciences, Seoul National University, Seoul, 151-742 Korea, CNRS, UPR3079 CEMHTI, 1D avenue de la Recherche Scientifique, 45071 Orléans cedex 2, France, and Faculté des Sciences, Université d’Orléans, Avenue du Parc Floral, BP 6749, 45067 Orléans cedex 2, France
| | - Sun Young Park
- School of Earth and Environmental Sciences, Seoul National University, Seoul, 151-742 Korea, CNRS, UPR3079 CEMHTI, 1D avenue de la Recherche Scientifique, 45071 Orléans cedex 2, France, and Faculté des Sciences, Université d’Orléans, Avenue du Parc Floral, BP 6749, 45067 Orléans cedex 2, France
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19
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Hung I, Uldry AC, Becker-Baldus J, Webber AL, Wong A, Smith ME, Joyce SA, Yates JR, Pickard CJ, Dupree R, Brown SP. Probing Heteronuclear 15N−17O and 13C−17O Connectivities and Proximities by Solid-State NMR Spectroscopy. J Am Chem Soc 2009; 131:1820-34. [DOI: 10.1021/ja805898d] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Ivan Hung
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, and TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K
| | - Anne-Christine Uldry
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, and TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K
| | - Johanna Becker-Baldus
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, and TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K
| | - Amy L. Webber
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, and TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K
| | - Alan Wong
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, and TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K
| | - Mark E. Smith
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, and TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K
| | - Siân A. Joyce
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, and TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K
| | - Jonathan R. Yates
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, and TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K
| | - Chris J. Pickard
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, and TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K
| | - Ray Dupree
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, and TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K
| | - Steven P. Brown
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, and TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K
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20
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Zhu J, Geris AJ, Wu G. Solid-state 17O NMR as a sensitive probe of keto and gem-diol forms of α-keto acid derivatives. Phys Chem Chem Phys 2009; 11:6972-80. [DOI: 10.1039/b906438a] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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21
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Wu G, Mason P, Mo X, Terskikh V. Experimental and Computational Characterization of the 17O Quadrupole Coupling and Magnetic Shielding Tensors for p-Nitrobenzaldehyde and Formaldehyde. J Phys Chem A 2008; 112:1024-32. [DOI: 10.1021/jp077558e] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gang Wu
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario, Canada K7L 3N6, and Steacie Institute for Molecular Sciences, National Research Council of Canada, Ottawa, Ontario, Canada K1A 0R6
| | - Peter Mason
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario, Canada K7L 3N6, and Steacie Institute for Molecular Sciences, National Research Council of Canada, Ottawa, Ontario, Canada K1A 0R6
| | - Xin Mo
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario, Canada K7L 3N6, and Steacie Institute for Molecular Sciences, National Research Council of Canada, Ottawa, Ontario, Canada K1A 0R6
| | - Victor Terskikh
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario, Canada K7L 3N6, and Steacie Institute for Molecular Sciences, National Research Council of Canada, Ottawa, Ontario, Canada K1A 0R6
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22
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Kwan ICM, Mo X, Wu G. Probing Hydrogen Bonding and Ion−Carbonyl Interactions by Solid-State 17O NMR Spectroscopy: G-Ribbon and G-Quartet. J Am Chem Soc 2007; 129:2398-407. [PMID: 17269776 DOI: 10.1021/ja067991m] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report solid-state 17O NMR determination of the 17O NMR tensors for the keto carbonyl oxygen (O6) of guanine in two 17O-enriched guanosine derivatives: [6-17O]guanosine (G1) and 2',3',5'-O-triacetyl-[6-17O]guanosine (G2). In G1.2H2O, guanosine molecules form hydrogen-bonded G-ribbons where the guanine bases are linked by O6...H-N2 and N7...H-N7 hydrogen bonds in a zigzag fashion. In addition, the keto carbonyl oxygen O6 is also weakly hydrogen-bonded to two water molecules of hydration. The experimental 17O NMR tensors determined for the two independent molecules in the asymmetric unit of G1.2H2O are: Molecule A, CQ=7.8+/-0.1 MHz, etaQ=0.45+/-0.05, deltaiso=263+/-2, delta11=460+/-5, delta22=360+/-5, delta33=-30+/-5 ppm; Molecule B, CQ=7.7+/-0.1 MHz, etaQ=0.55+/-0.05, deltaiso=250+/-2, delta11=440+/-5, delta22=340+/-5, delta33=-30+/-5 ppm. In G1/K+ gel, guanosine molecules form extensively stacking G-quartets. In each G-quartet, four guanine bases are linked together by four pairs of O6...H-N1 and N7...H-N2 hydrogen bonds in a cyclic fashion. In addition, each O6 atom is simultaneously coordinated to two K+ ions. For G1/K+ gel, the experimental 17O NMR tensors are: CQ=7.2+/-0.1 MHz, etaQ=0.68+/-0.05, deltaiso=232+/-2, delta11=400+/-5, delta22=300+/-5, delta33=-20+/-5 ppm. In the presence of divalent cations such as Sr2+, Ba2+, and Pb2+, G2 molecules form discrete octamers containing two stacking G-quartets and a central metal ion, that is, (G2)4-M2+-(G2)4. In this case, each O6 atom of the G-quartet is coordinated to only one metal ion. For G2/M2+ octamers, the experimental 17O NMR parameters are: Sr2+, CQ=6.8+/-0.1 MHz, etaQ=1.00+/-0.05, deltaiso=232+/-2 ppm; Ba2+, CQ=7.0+/-0.1 MHz, etaQ=0.68+/-0.05, deltaiso=232+/-2 ppm; Pb2+, CQ=7.2+/-0.1 MHz, etaQ=1.00+/-0.05, deltaiso=232+/-2 ppm. We also perform extensive quantum chemical calculations for the 17O NMR tensors in both G-ribbons and G-quartets. Our results demonstrate that the 17O chemical shift tensor and quadrupole coupling tensor are very sensitive to the presence of hydrogen bonding and ion-carbonyl interactions. Furthermore, the effect from ion-carbonyl interactions is several times stronger than that from hydrogen-bonding interactions. Our results establish a basis for using solid-state 17O NMR as a probe in the study of ion binding in G-quadruplex DNA and ion channel proteins.
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Affiliation(s)
- Irene C M Kwan
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario, Canada K7L 3N6
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23
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Yamada K, Nemoto T, Asanuma M, Honda H, Yamazaki T, Hirota H. Both experimental and theoretical investigations of solid-state 17O NMR for L-valine and L-isoleucine. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2006; 30:182-91. [PMID: 17074470 DOI: 10.1016/j.ssnmr.2006.09.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2006] [Accepted: 09/27/2006] [Indexed: 05/12/2023]
Abstract
We have presented an experimental investigation of the carboxyl oxygen NMR parameters for four distinct sites in l-valine and l-isoleucine. The carboxyl (17)O quadrupolar coupling constant, C(Q), and isotropic chemical shift, delta(iso), for these compounds are obtained by analyzing two-dimensional (17)O multiple-quantum magic-angle spinning (MQMAS) and/or 1D MAS spectra. The values of C(Q) and delta(iso) found to be in the range of 7.00-7.85 MHz, and 264-314 ppm, respectively. Extensive quantum chemical calculations at the density functional levels have been performed for a full cluster of l-valine molecules and a few theoretical models. The calculated results indicated that there was a correlation between the (17)O NMR parameters and C-O bond lengths, which was helpful for the spectral assignment. They also demonstrated that the torsion angle of l-valine plays an important role in determining the magnitudes of (17)O NMR parameters.
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Affiliation(s)
- Kazuhiko Yamada
- RIKEN Genomic Sciences Center, 1-7-22 Suehiro, Tsurumi, Yokohama 230-0045, Japan.
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24
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Howes A, Anupõld T, Lemaitre V, Kukol A, Watts A, Samoson A, Smith M, Dupree R. Enhancing resolution and sensitivity of 17O solid-state NMR through combining double rotation, 1H decoupling and satellite modulation for biomolecular applications. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.01.061] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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25
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Prasad S, Clark TM, Sharma R, Kwak HT, Grandinetti PJ, Zimmermann H. A combined 17O RAPT and MQ-MAS NMR study of L-leucine. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2006; 29:119-24. [PMID: 16293400 DOI: 10.1016/j.ssnmr.2005.10.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2005] [Revised: 10/04/2005] [Indexed: 05/05/2023]
Abstract
We report the application of rotor-assisted population transfer (RAPT) to measure the quadrupolar coupling constant (C(q)) for spin 5/2 nuclei. Results from numerical simulations are presented on the magnitude of enhancement factor as a function of frequency offsets, i.e. the RAPT profile. Experimental O17 RAPT profile is traced for the amino acid L-leucine. In addition, results from MQ-MAS experiments are incorporated to determine the quadrupolar asymmetry parameter (eta(q)). Unlike previous reports, the O17 NMR parameters for an amino acid, L-leucine, is reported at a relatively low field of 9.4 T.
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Affiliation(s)
- Subramanian Prasad
- Department of Chemistry, The Ohio State University, 120 W. 18th Avenue, Columbus, OH 43210-1173, USA
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26
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Wong A, Pike KJ, Jenkins R, Clarkson GJ, Anupõld T, Howes AP, Crout DHG, Samoson A, Dupree R, Smith ME. Experimental and Theoretical 17O NMR Study of the Influence of Hydrogen-Bonding on CO and O−H Oxygens in Carboxylic Solids. J Phys Chem A 2006; 110:1824-35. [PMID: 16451014 DOI: 10.1021/jp055807y] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A systematic solid-state 17O NMR study of a series of carboxylic compounds, maleic acid, chloromaleic acid, KH maleate, KH chloromaleate, K2 chloromaleate, and LiH phthalate.MeOH, is reported. Magic-angle spinning (MAS), triple-quantum (3Q) MAS, and double angle rotation (DOR) 17O NMR spectra were recorded at high magnetic fields (14.1 and 18.8 T). 17O MAS NMR for metal-free carboxylic acids and metal-containing carboxylic salts show featured spectra and demonstrate that this combined, where necessary, with DOR and 3QMAS, can yield site-specific information for samples containing multiple oxygen sites. In addition to 17O NMR spectroscopy, extensive quantum mechanical calculations were carried out to explore the influence of hydrogen bonding at these oxygen sites. B3LYP/6-311G++(d,p) calculations of 17O NMR parameters yielded good agreement with the experimental values. Linear correlations are observed between the calculated 17O NMR parameters and the hydrogen bond strengths, suggesting the possibility of estimating H-bonding information from 17O NMR data. The calculations also revealed intermolecular H-bond effects on the 17O NMR shielding tensors. It is found that the delta11 and delta22 components of the chemical shift tensor at O-H and C=O, respectively, are aligned nearly parallel with the strong H-bond and shift away from this direction as the H-bond interaction weakens.
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Affiliation(s)
- Alan Wong
- Department of Physics, University of Warwick, Coventry, CV4 7AL, U. K
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27
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Ida R, De Clerk M, Wu G. Influence of N−H···O and C−H···O Hydrogen Bonds on the 17O NMR Tensors in Crystalline Uracil: Computational Study. J Phys Chem A 2005; 110:1065-71. [PMID: 16420009 DOI: 10.1021/jp0554947] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We report a computational study for the 17O NMR tensors (electric field gradient and chemical shielding tensors) in crystalline uracil. We found that N-H...O and C-H...O hydrogen bonds around the uracil molecule in the crystal lattice have quite different influences on the 17O NMR tensors for the two C=O groups. The computed 17O NMR tensors on O4, which is involved in two strong N-H...O hydrogen bonds, show remarkable sensitivity toward the choice of cluster model, whereas the 17O NMR tensors on O2, which is involved in two weak C-H...O hydrogen bonds, show much smaller improvement when the cluster model includes the C-H...O hydrogen bonds. Our results demonstrate that it is important to have accurate hydrogen atom positions in the molecular models used for 17O NMR tensor calculations. In the absence of low-temperature neutron diffraction data, an effective way to generate reliable hydrogen atom positions in the molecular cluster model is to employ partial geometry optimization for hydrogen atom positions using a cluster model that includes all neighboring hydrogen-bonded molecules. Using an optimized seven-molecule model (a total of 84 atoms), we were able to reproduce the experimental 17O NMR tensors to a reasonably good degree of accuracy. However, we also found that the accuracy for the calculated 17O NMR tensors at O2 is not as good as that found for the corresponding tensors at O4. In particular, at the B3LYP/6-311++G(d,p) level of theory, the individual 17O chemical shielding tensor components differ by less than 10 and 30 ppm from the experimental values for O4 and O2, respectively. For the 17O quadrupole coupling constant, the calculated values differ by 0.30 and 0.87 MHz from the experimental values for O4 and O2, respectively.
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Affiliation(s)
- Ramsey Ida
- Department of Chemistry, Queen's University, Kingston, Ontario, Canada K7L 3N6
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28
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Malicki N, Mafra L, Quoineaud AA, Rocha J, Thibault-Starzyk F, Fernandez C. Multiplex MQMAS NMR of quadrupolar nuclei. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2005; 28:13-21. [PMID: 16026687 DOI: 10.1016/j.ssnmr.2005.02.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2005] [Revised: 02/21/2005] [Accepted: 02/26/2005] [Indexed: 05/03/2023]
Abstract
A multiplex phase cycling method (N. Ivchenko et al., J. Magn. Reson. 160 (2003) 52-58) has been used to record two-dimensional MQMAS spectra with a very short phase cycling. A straightforward procedure has been developed to easily process the data. Combining this Multiplex approach and the new Soft-Pulse-Adding-Mixing (SPAM) method considerably increases the signal-to-noise ratio of the conventional MQMAS experiment. The Multiplex acquisition procedure is much simpler than the echo/anti-echo method recently proposed, and has been applied with success to record (87)Rb spectra of RbNO(3) and (27)Al 3Q and 5Q MQMAS NMR of microporous aluminophosphate AlPO(4)-14.
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Affiliation(s)
- Nicolas Malicki
- Laboratoire Catalyse et Spectrochimie, Unité Mixte de Recherche CNRS/ENSICAEN Université de CAEN-Basse Normandie, 6 Bd. Maréchal Juin, 14050 CAEN, France
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29
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Lemaître V, Smith ME, Watts A. A review of oxygen-17 solid-state NMR of organic materials--towards biological applications. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2004; 26:215-235. [PMID: 15388187 DOI: 10.1016/j.ssnmr.2004.04.004] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2004] [Revised: 03/31/2004] [Indexed: 05/24/2023]
Abstract
17O solid state NMR of organic materials is developing rapidly. This article provides a snapshot of the current state of development of this field. The NMR techniques and enrichment protocols that are driving this progress are outlined. The (17)O parameters derived from solid-state NMR experiments are summarized and the structural sensitivity of the approach to effects such as hydrogen bonding highlighted. The prospects and challenges for (17)O solid-state NMR of biomolecules are discussed.
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Affiliation(s)
- V Lemaître
- Biomembrane Structure Unit, Department of Biochemistry, Oxford University, South Parks Road, Oxford OX1 3QU, UK
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30
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Pike KJ, Lemaitre V, Kukol A, Anupõld T, Samoson A, Howes AP, Watts A, Smith ME, Dupree R. Solid-State 17O NMR of Amino Acids. J Phys Chem B 2004. [DOI: 10.1021/jp049958x] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- K. J. Pike
- Departments of Physics and Biological Sciences, University of Warwick, Coventry CV4 7AL, U.K., Biosciences Department, Nestlé Research Centre, Vers-chez-les-Blancs, P.O. Box 44, CH-1000 Lausanne 26, Switzerland, Biochemistry Department, University of Oxford, South Parks Road, Oxford OX1 3QU, U.K., and National Institute for Chemical Physics and Biophysics, Akadeemia Tee 23, Tallinn, Estonia
| | - V. Lemaitre
- Departments of Physics and Biological Sciences, University of Warwick, Coventry CV4 7AL, U.K., Biosciences Department, Nestlé Research Centre, Vers-chez-les-Blancs, P.O. Box 44, CH-1000 Lausanne 26, Switzerland, Biochemistry Department, University of Oxford, South Parks Road, Oxford OX1 3QU, U.K., and National Institute for Chemical Physics and Biophysics, Akadeemia Tee 23, Tallinn, Estonia
| | - A. Kukol
- Departments of Physics and Biological Sciences, University of Warwick, Coventry CV4 7AL, U.K., Biosciences Department, Nestlé Research Centre, Vers-chez-les-Blancs, P.O. Box 44, CH-1000 Lausanne 26, Switzerland, Biochemistry Department, University of Oxford, South Parks Road, Oxford OX1 3QU, U.K., and National Institute for Chemical Physics and Biophysics, Akadeemia Tee 23, Tallinn, Estonia
| | - T. Anupõld
- Departments of Physics and Biological Sciences, University of Warwick, Coventry CV4 7AL, U.K., Biosciences Department, Nestlé Research Centre, Vers-chez-les-Blancs, P.O. Box 44, CH-1000 Lausanne 26, Switzerland, Biochemistry Department, University of Oxford, South Parks Road, Oxford OX1 3QU, U.K., and National Institute for Chemical Physics and Biophysics, Akadeemia Tee 23, Tallinn, Estonia
| | - A. Samoson
- Departments of Physics and Biological Sciences, University of Warwick, Coventry CV4 7AL, U.K., Biosciences Department, Nestlé Research Centre, Vers-chez-les-Blancs, P.O. Box 44, CH-1000 Lausanne 26, Switzerland, Biochemistry Department, University of Oxford, South Parks Road, Oxford OX1 3QU, U.K., and National Institute for Chemical Physics and Biophysics, Akadeemia Tee 23, Tallinn, Estonia
| | - A. P. Howes
- Departments of Physics and Biological Sciences, University of Warwick, Coventry CV4 7AL, U.K., Biosciences Department, Nestlé Research Centre, Vers-chez-les-Blancs, P.O. Box 44, CH-1000 Lausanne 26, Switzerland, Biochemistry Department, University of Oxford, South Parks Road, Oxford OX1 3QU, U.K., and National Institute for Chemical Physics and Biophysics, Akadeemia Tee 23, Tallinn, Estonia
| | - A. Watts
- Departments of Physics and Biological Sciences, University of Warwick, Coventry CV4 7AL, U.K., Biosciences Department, Nestlé Research Centre, Vers-chez-les-Blancs, P.O. Box 44, CH-1000 Lausanne 26, Switzerland, Biochemistry Department, University of Oxford, South Parks Road, Oxford OX1 3QU, U.K., and National Institute for Chemical Physics and Biophysics, Akadeemia Tee 23, Tallinn, Estonia
| | - M. E. Smith
- Departments of Physics and Biological Sciences, University of Warwick, Coventry CV4 7AL, U.K., Biosciences Department, Nestlé Research Centre, Vers-chez-les-Blancs, P.O. Box 44, CH-1000 Lausanne 26, Switzerland, Biochemistry Department, University of Oxford, South Parks Road, Oxford OX1 3QU, U.K., and National Institute for Chemical Physics and Biophysics, Akadeemia Tee 23, Tallinn, Estonia
| | - R. Dupree
- Departments of Physics and Biological Sciences, University of Warwick, Coventry CV4 7AL, U.K., Biosciences Department, Nestlé Research Centre, Vers-chez-les-Blancs, P.O. Box 44, CH-1000 Lausanne 26, Switzerland, Biochemistry Department, University of Oxford, South Parks Road, Oxford OX1 3QU, U.K., and National Institute for Chemical Physics and Biophysics, Akadeemia Tee 23, Tallinn, Estonia
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31
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Lee SK. Structure of Silicate Glasses and Melts at High Pressure: Quantum Chemical Calculations and Solid-State NMR. J Phys Chem B 2004. [DOI: 10.1021/jp037575d] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sung Keun Lee
- Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road, Washington, D.C. 20015
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32
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Troganis AN, Tsanaktsidis C, Gerothanassis IP. 14N NMR relaxation times of several protein amino acids in aqueous solution--comparison with 17O NMR data and estimation of the relative hydration numbers in the cationic and zwitterionic forms. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2003; 164:294-303. [PMID: 14511597 DOI: 10.1016/s1090-7807(03)00249-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The 14N nuclear magnetic resonance (NMR) linewidths of the alpha-amino groups of several protein amino acids were measured in aqueous solution, with and without composite proton decoupling, to estimate the effect of proton exchange and molecular weight on the linewidths. It is shown that, contrary to earlier claims, the increase in the linewidth at low pH is not exclusively due to the effect of proton exchange broadening. The 14N linewidths, under composite proton decoupling, increase with the bulk of the amino acid, and increase at low pH. Statistical treatment of the experimental 14N and literature 17O NMR data was performed assuming two models: (i) an isotropic molecular reorientation of a rigid sphere in a medium of viscosity eta, (ii) a stochastic diffusion of the amino and carboxyl groups comprising contributions from internal (tauint) and overall (taumol) motions. Assuming a single correlation time from overall molecular reorientation (taumol), then, a linear correlation was found between the linewidths and the molecular weights of the protein amino acids at the pH values 0.5 and 6.0, which are characteristic of the cationic and zwitterionic forms, respectively. The slopes of the straight-lines were found to be dependent of pH for 14N, contrary to the 17O linear correlations whose slopes were found to be independent of pH. Assuming effective correlation times of the amino and carboxyl groups, which comprise contributions from the internal (tauint) and overall (taumol) motions, then, a significant improvement of the statistics of the regression analysis was observed. The 14N relaxation data, in conjunction with 17O NMR linewidths, can be interpreted by assuming that the 14N quadrupole coupling constants (NQCCs) are influenced by the protonation state of the carboxyl group, the 17O NQCCs remain constant, and the cationic form of the amino acids is hydrated by an excess of 1-3 molecules of water relative to the zwitterionic state.
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Affiliation(s)
- Anastassios N Troganis
- Department of Biological Applications and Technologies, University of Ioannina, Ioannina GR-451 10, Greece.
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33
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Wu G, Yamada K. Determination of the 17O NMR tensors in potassium hydrogen dibenzoate: a salt containing a short O...H...O hydrogen bond. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2003; 24:196-208. [PMID: 12943914 DOI: 10.1016/s0926-2040(03)00046-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Solid-state 17O NMR spectra were obtained at 4.70, 11.75 and 19.60T for potassium hydrogen [17O(4)]dibenzoate (PHB) under both magic-angle spinning and stationary conditions. Spectral analyses yielded both the magnitude and orientation of the 17O chemical shift (CS) tensor and the electric field gradient (EFG) tensor for each of the two chemically distinct oxygen sites in PHB. For the oxygen site that is not involved in hydrogen bonding, the experimental 17O NMR tensors are: delta(iso)=287+/-2 ppm, delta(11)=470+/-5 ppm, delta(22)=380+/-5 ppm, delta(33)=10+/-5 ppm, C(Q)=8.30+/-0.02 MHz, eta(Q)=0.23+/-0.05, alpha=0+/-5 degrees, beta=90+/-5 degrees, and gamma=30+/-5 degrees. For the oxygen site in the short O...H...O hydrogen bond, the experimental 17O NMR tensors are: delta(iso)=213+/-2 ppm, delta(11)=370+/-5 ppm, delta(22)=190+/-5 ppm, delta(33)=80+/-5 ppm, C(Q)=5.90+/-0.02 MHz, eta(Q)=0.55+/-0.05, alpha=5+/-5 degrees, beta=90+/-5 degrees, and gamma=90+/-5 degrees. Extensive quantum mechanical calculations at both restricted Hartree-Fock and density functional theory levels were performed to investigate the effects of an effectively symmetrical O...H...O hydrogen bond on 17O CS and EFG tensors.
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Affiliation(s)
- Gang Wu
- Department of Chemistry, Queen's University, Kingston, Ont., Canada K7L 3N6.
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34
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Sproviero EM, Burton G. Stereoelectronic Interactions and Molecular Properties. An NBO-Based Study of Uracil. J Phys Chem A 2003. [DOI: 10.1021/jp0271763] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Eduardo M. Sproviero
- Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón 2, Ciudad Universitaria, (C1428EGA) Buenos Aires, Argentina
| | - Gerardo Burton
- Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón 2, Ciudad Universitaria, (C1428EGA) Buenos Aires, Argentina
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Lemaitre V, Pike K, Watts A, Anupold T, Samoson A, Smith M, Dupree R. New insights into the bonding arrangements of l- and d-glutamates from solid state 17O NMR. Chem Phys Lett 2003. [DOI: 10.1016/s0009-2614(03)00254-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Wu G, Dong S, Ida R, Reen N. A solid-state (17)O nuclear magnetic resonance study of nucleic acid bases. J Am Chem Soc 2002; 124:1768-77. [PMID: 11853455 DOI: 10.1021/ja011625f] [Citation(s) in RCA: 118] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report a systematic solid-state (17)O NMR study of free nucleic acid bases: thymine (T), uracil (U), cytosine (C), and guanine (G). Site-specifically (17)O-enriched samples were synthesized:[2-(17)O]thymine (1), [4-(17)O]thymine (2), [2-(17)O]uracil (3), [4-(17)O]uracil (4), [2-(17)O]cytosine (5), and [6-(17)O]guanine monohydrate (6). Magic-angle-spinning (MAS) and static (17)O NMR spectra were acquired at 11.75 T for compounds 1-6, from which information about the (17)O chemical shift and electric field gradient tensors was obtained. Extensive quantum chemical calculations were performed at the B3LYP/6-311++G(d,p) level of theory for (17)O NMR properties in various molecular models. The calculated (17)O NMR tensors are highly sensitive to the description of intermolecular hydrogen-bonding interactions at the target oxygen atom. A reasonably good agreement between experimental solid-state (17)O NMR data and B3LYP/6-311++G(d,p) calculations is achievable only in molecular cluster models where a complete hydrogen-bond network is considered. Using this theoretical approach, we also investigated the (17)O NMR tensors in two unusual structures: guanine- and uracil-quartets.
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Affiliation(s)
- Gang Wu
- Contribution from the Department of Chemistry, Queen's University, Kingston, Ontario, Canada K7L 3N6.
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