51
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Ramamoorthy A, Lee DK, Santos JS, Henzler-Wildman KA. Nitrogen-14 Solid-State NMR Spectroscopy of Aligned Phospholipid Bilayers to Probe Peptide−Lipid Interaction and Oligomerization of Membrane Associated Peptides. J Am Chem Soc 2008; 130:11023-9. [DOI: 10.1021/ja802210u] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ayyalusamy Ramamoorthy
- Biophysics and Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055
| | - Dong-Kuk Lee
- Biophysics and Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055
| | - Jose S. Santos
- Biophysics and Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055
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52
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Simultaneous adiabatic spin-locking cross polarization in solid-state NMR of paramagnetic complexes. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.06.027] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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53
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Antonijevic S, Halpern-Manners N. Probing amide bond nitrogens in solids using 14N NMR spectroscopy. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2008; 33:82-87. [PMID: 18515050 DOI: 10.1016/j.ssnmr.2008.04.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2008] [Indexed: 05/26/2023]
Abstract
A novel two-dimensional nuclear magnetic resonance (NMR) experiment is proposed for indirect observation of 14N nuclei in various types of nitrogen-containing solids. In a method somewhat similar to the heteronuclear single-quantum correlation (HSQC) experiment widely used for protein structure determination in solutions, this technique correlates spin S=1/2 nuclei, e.g., 1H, 13C, with the 14N spin I=1 nucleus in solids. The present experiment, however, transfers coherence from neighboring 1H or 13C nuclei to 14N via a combination of J-couplings and residual dipolar splittings (RDS). Projections of the two-dimensional NMR spectra onto the 14N dimension yield powder patterns that reflect the 14N quadrupolar interaction, which can be used to study molecular structure and dynamics. Indirect detection of amide nitrogen-14 via 1H and 13C is shown experimentally on a model compound of N-acetyl-glycine.
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Affiliation(s)
- Sasa Antonijevic
- Department of Chemistry, University of California, Berkeley, 1 Cyclotron Road Building 11-D64, Berkeley, CA 94720, USA.
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54
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Trease NM, Grandinetti PJ. Solid-state nuclear magnetic resonance in the rotating tilted frame. J Chem Phys 2008; 128:052318. [DOI: 10.1063/1.2833580] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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55
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Gan Z. Measuring nitrogen quadrupolar coupling with13C detected wide-line 14N NMR under magic-angle spinning. Chem Commun (Camb) 2008:868-70. [DOI: 10.1039/b716383e] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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56
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Cavadini S, Antonijevic S, Lupulescu A, Bodenhausen G. Indirect Detection of Nitrogen-14 in Solid-State NMR Spectroscopy. Chemphyschem 2007; 8:1363-74. [PMID: 17503424 DOI: 10.1002/cphc.200700049] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
NMR spectra of (14)N (spin I=1) are obtained by indirect detection in powders spinning at the magic angle. The method relies on the transfer of coherence from a neighboring "spy" nucleus with S=1/2, such as (13)C or (1)H, to single- or double-quantum transitions of (14)N nuclei. The transfer of coherence can occur through a combination of scalar and residual dipolar splittings (RDS); the latter are also known as second-order quadrupole-dipole cross terms. The two-dimensional NMR spectra reveal powder patterns determined by second- and third-order quadrupolar couplings. These spectra depend on the quadrupolar coupling constant C(Q) (typically a few megahertz), on the asymmetry parameter eta(Q) of the (14)N nucleus, and on the orientation of the internuclear vector r(IS) between the I ((14)N) and S (spy) nuclei with respect to the quadrupolar tensor. These parameters, which can be subject to motional averaging, can reveal valuable information about the structure and dynamics of nitrogen-containing solids. Application of this technique to various amino acids, either enriched in (13)C or with natural carbon isotope abundance, with spectra recorded at various magnetic fields, illustrates the scope of the method.
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Affiliation(s)
- Simone Cavadini
- Laboratoire de Résonance Magnétique Biomoléculaire, Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne, Batochime, 1015 Lausanne, Switzerland.
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57
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Gan Z. 13C/14N heteronuclear multiple-quantum correlation with rotary resonance and REDOR dipolar recoupling. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2007; 184:39-43. [PMID: 17029884 DOI: 10.1016/j.jmr.2006.09.016] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2006] [Revised: 09/20/2006] [Accepted: 09/20/2006] [Indexed: 05/12/2023]
Abstract
A two-dimensional (13)C/(14)N heteronuclear multiple quantum correlation (HMQC) experiment using dipolar recoupling under magic-angle spinning (MAS) is described. The experiment is an extension of the recent indirect (13)C detection scheme for measuring (14)N quadrupolar coupling under MAS. The recoupling allows the direct use of the much larger dipolar interaction instead of the small J and residual dipolar couplings for establishing (13)C/(14)N correlations. Two recoupling methods are incorporated into the HMQC sequence, both applying rf only to the observed (13)C spin. The first one uses the REDOR sequence with two pi-pulses per rotor cycle. The second one uses a cw rf field matching the spinning frequency, known as rotary resonance. The effects of CSA, T(2)(') signal loss, MAS frequency and stability and t(1)-noise are compared and discussed.
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Affiliation(s)
- Zhehong Gan
- Center of Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, Tallahassee, FL 32310, USA
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58
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Orr RM, Duer MJ. Decoupling residual dipolar coupling between 13C and14N spin pairs in CPMAS NMR. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2006; 30:130-4. [PMID: 16889945 DOI: 10.1016/j.ssnmr.2006.06.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2006] [Revised: 06/13/2006] [Accepted: 06/23/2006] [Indexed: 05/11/2023]
Abstract
Decoupling of the residual dipolar coupling between (13)C and(14)N nuclei is investigated experimentally in a triple resonance experiment. It is shown that pulsed decoupling can be used to give enhanced sensitivity and reduced line widths and the technique is illustrated using short peptides.
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Affiliation(s)
- Robin M Orr
- University Chemical Laboratory, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
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59
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Gan Z. Measuring Amide Nitrogen Quadrupolar Coupling by High-Resolution 14N/13C NMR Correlation under Magic-Angle Spinning. J Am Chem Soc 2006; 128:6040-1. [PMID: 16669665 DOI: 10.1021/ja0578597] [Citation(s) in RCA: 111] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The measurement of amide nitrogen 14N quadrupolar coupling by two-dimensional 14N/13C correlation experiment is presented with a natural abundant polypeptide. Directly bonded 14N/13C pairs are correlated through J and residual dipolar coupling under magic-angle spinning using a HMQC-type pulse sequence. The 14N quadrupolar coupling is measured from the isotropic second-order quadrupolar shift obtained by comparing the 14N peak positions with the 15N chemical shifts. The high spectral resolution and sensitivity through 13C detection make this method applicable to many organic, inorganic, and biological molecules for the measurement and the use of 14N quadrupolar coupling as a probe for molecular structure and dynamics.
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Affiliation(s)
- Zhehong Gan
- National High Magnetic Field Laboratory, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, USA.
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60
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Bowers CR, Caldwell JD, Gusev G, Kovalev AE, Olshanetsky E, Reno JL, Simmons JA, Vitkalov SA. Dynamic nuclear polarization and nuclear magnetic resonance in the vicinity of edge states of a 2DES in GaAs quantum wells. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2006; 29:52-65. [PMID: 16216476 DOI: 10.1016/j.ssnmr.2005.08.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2005] [Revised: 08/23/2005] [Indexed: 05/04/2023]
Abstract
Nuclear magnetic resonance is detected via the in-plane conductivity of a two-dimensional electron system at unity Landau level filling factor in the regime of the quantum Hall effect in narrow and wide quantum wells. The NMR is spatially selective to nuclei with a coupling to electrons in the current carrying edge states at the perimeter of the 2DES. Interpretation of the electron-nuclear double resonance signals is facilitated by numerical simulations. A new RF swept method for conductivity-detected NMR is introduced which offers more efficient signal averaging. The method is applied to the study of electric quadrupole interactions, weakly allowed overtone transitions, and evaluation of the extent of electron wave function delocalization in the wide quantum well.
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Affiliation(s)
- Clifford R Bowers
- Department of Chemistry, National High Magnetic Field Laboratory, University of Florida, Gainesville, Florida 32611-7200, USA.
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61
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Kuwahara D, Okamoto H, Yamazaki Y. Feasibility of the overtone NMR for half-integer quadrupolar nuclei. Chem Phys Lett 2005. [DOI: 10.1016/j.cplett.2005.08.103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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62
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Khasawneh M, Hartman JS, Bain * AD. Direct detection of chlorine-35 multiple-quantum NMR transitions in a single crystal of sodium chlorate. Mol Phys 2004. [DOI: 10.1080/00268970410001717304] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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63
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Bain AD, Khasawneh M. From NQR to NMR: The complete range of quadrupole interactions. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/cmr.a.20013] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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64
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Blümich B, Spiess HW. Two-Dimensional Solid-State NMR Spectroscopy: New Possibilities for the Investigation of the Structure and Dynamics of Solid Polymers [New Analytical Methods (38)]. ACTA ACUST UNITED AC 2003. [DOI: 10.1002/anie.198816551] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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65
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Simulations of the 13C–14N REDOR NMR experiments performed with a frequency-sweep 14N overtone pulse. Chem Phys Lett 2003. [DOI: 10.1016/s0009-2614(03)01082-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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66
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Grandinetti PJ. Does phase cycling work for nuclei experiencing strong quadrupolar couplings? SOLID STATE NUCLEAR MAGNETIC RESONANCE 2003; 23:1-13. [PMID: 12633828 DOI: 10.1016/s0926-2040(02)00022-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The question of whether the phase cycling can still be used to select coherence transfer pathways in spin systems experiencing a tilting of its eigenstates away from the Zeeman eigenstates due to strong couplings was investigated theoretically. Based on the analysis presented it is concluded that conventional phase cycling is still a valid approach for selecting a coherence transfer pathway signal, although changes in pathway efficiencies can occur as the mechanisms for excitation and detection of coherences are affected by the tilting of the eigenstates.
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67
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Petkova AT, Tycko R. Sensitivity enhancement in structural measurements by solid state NMR through pulsed spin locking. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2002; 155:293-299. [PMID: 12036340 DOI: 10.1006/jmre.2002.2519] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Free induction decay (FID) signals in solid state NMR measurements performed with magic angle spinning can often be extended in time by factors on the order of 10 by a simple pulsed spin locking technique. The sensitivity of a structural measurement in which the structural information is contained in the dependence of the integrated FID amplitude on a preceding evolution period can therefore be enhanced substantially by pulsed spin locking in the signal detection period. We demonstrate sensitivity enhancements in a variety of solid state NMR techniques that are applicable to selectively isotopically labeled samples, including 13C-15N rotational echo double resonance (REDOR), 13C-13C dipolar recoupling measurements using the constant-time finite-pulse radio-frequency-driven recoupling (fpRFDR-CT) and constant-time double-quantum-filtered dipolar recoupling (CTDQFD) techniques, and torsion angle measurements using the double quantum chemical shift anisotropy (DQCSA) technique. Further, we demonstrate that the structural information in the solid state NMR data is not distorted by pulsed spin locking in the detection period.
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Affiliation(s)
- Aneta T Petkova
- Laboratory of Chemical Physics, National Institutes of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland, 20892-0520, USA
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68
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Marburger SP, Fung BM, Khitrin AK. 14N chemical shifts and quadrupole coupling constants of inorganic nitrates. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2002; 154:205-209. [PMID: 11846578 DOI: 10.1006/jmre.2001.2490] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The isotropic chemical shift and the nuclear quadrupole coupling constant for (14)N were obtained for 14 inorganic nitrates by solid-state MAS NMR measurements at two different field strengths, 9.4 and 11.7 T. The compounds studied were polycrystalline powders of AgNO(3), Al(NO(3))(3), Ba(NO(3))(2), Ca(NO(3))(2), CsNO(3), KNO(3), LiNO(3), Mg(NO(3))(2), NaNO(3), Pb(NO(3))(2), RbNO(3), Sr(NO(3))(2), Th(NO(3))(4)center dot4H(2)O, and UO(2)(NO(3))(2)center dot3H(2)O. Even though the spectra show broadening due to (14)N quadrupole interactions, linewidths of a few hundred hertz and a good signal-to-noise ratio were achieved. From the position of the central peaks at the two fields, the chemical shifts and the nuclear quadrupole coupling constants were calculated. The chemical shifts for all compounds studied range from 282 to 342 ppm with respect to NH(4)Cl. The nuclear quadrupole coupling constants range from 429 kHz for AgNO(3) to 993 kHz for LiNO(3). These data are compared with those available in the literature.
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Affiliation(s)
- Simon P Marburger
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019-3051, USA
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69
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Wi S, Frydman L. Quadrupolar-shielding cross-correlations in solid state nuclear magnetic resonance: Detecting antisymmetric components in chemical shift tensors. J Chem Phys 2002. [DOI: 10.1063/1.1406533] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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70
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Takegoshi K, Yano T, Takeda K, Terao T. Indirect high-resolution observation of 14N NMR in rotating solids. J Am Chem Soc 2001; 123:10786-7. [PMID: 11674031 DOI: 10.1021/ja016789a] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- K Takegoshi
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
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71
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Wi S, Frydman L. Heteronuclear recoupling in solid-state magic-angle-spinning NMR via overtone irradiation. J Am Chem Soc 2001; 123:10354-61. [PMID: 11603986 DOI: 10.1021/ja0113798] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A heteronuclear dipolar recoupling scheme applicable to I-S spin pairs undergoing magic-angle-spinning (MAS) is introduced, based on the overtone irradiation of one of the coupled nuclei. It is shown that when I is a quadrupole, for instance (14)N, irradiating this spin at a multiple of its Larmor frequency prevents the formation of MAS dipolar echoes. The ensuing S-spin signal dephasing is significant and dependent on a number of parameters, including the I-S dipolar coupling, the magnitude of I's quadrupolar coupling, and the relative orientations between these two coupling tensors. When applied to a spin-1 nucleus, this overtone recoupling method differs from hitherto proposed recoupling strategies in that it involves only the +/-1> I(z) eigenstates. Its dephasing efficiency becomes independent of first-order quadrupolar effects yet shows a high sensitivity to second-order offsets. A constant-time/variable-offset recoupling sequence thus provides a simple route to acquire, in an indirect fashion, (14)N overtone spectra from rotating powders. The principles underlying this kind of S-(14)N experiments and different applications involving S = (13)C, (59)Co sites are presented.
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Affiliation(s)
- S Wi
- Department of Chemical Physics, Weizmann Institute of Sciences, 76100 Rehovot, Israel
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72
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Tycko R. Biomolecular solid state NMR: advances in structural methodology and applications to peptide and protein fibrils. Annu Rev Phys Chem 2001; 52:575-606. [PMID: 11326075 DOI: 10.1146/annurev.physchem.52.1.575] [Citation(s) in RCA: 101] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Solid state nuclear magnetic resonance (NMR) methods can provide atomic-level structural constraints on peptides and proteins in forms that are not amenable to characterization by other high-resolution structural techniques, owing to insolubility, high molecular weight, noncrystallinity, or other characteristics. Important examples include peptide and protein fibrils and membrane-bound peptides and proteins. Recent advances in solid state NMR methodology aimed at structural problems in biological systems are reviewed. The power of these methods is illustrated by experimental results on amyloid fibrils and other protein fibrils.
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Affiliation(s)
- R Tycko
- Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892-0520, USA.
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73
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74
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Khitrin AK, Fung BM. 14N nuclear magnetic resonance of polycrystalline solids with fast spinning at or very near the magic angle. J Chem Phys 1999. [DOI: 10.1063/1.480239] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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75
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76
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Marinelli L, Wi S, Frydman L. A density matrix description of 14N overtone nuclear magnetic resonance in static and spinning solids. J Chem Phys 1999. [DOI: 10.1063/1.477906] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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77
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Kuwahara D, Nakai T, Miyajima S. Two-dimensional NMR measurements of heteronuclear dipolar powder spectra using the chemical-shift-anisotropy recovery technique. Chem Phys Lett 1998. [DOI: 10.1016/s0009-2614(98)00575-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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78
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79
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80
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Bonhomme C, Livage J. Pictorial Representation of Anisotropy and Macroscopic Reorientations of Samples in Solid-State NMR: First-Order Interactions. J Phys Chem A 1998. [DOI: 10.1021/jp972525s] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- C. Bonhomme
- Laboratoire de Chimie de la Matière Condensée, URA CNRS 1466, Université Pierre et Marie Curie, 4 Place Jussieu, 75252 Paris, Cedex 05, France
| | - J. Livage
- Laboratoire de Chimie de la Matière Condensée, URA CNRS 1466, Université Pierre et Marie Curie, 4 Place Jussieu, 75252 Paris, Cedex 05, France
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81
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Ylinen EE, Kaikkonen A, Punkkinen M. Double quantum coherence of quadrupolar I = 1 nuclei: 14N in NH4ClO4. SOLID STATE NUCLEAR MAGNETIC RESONANCE 1997; 10:25-31. [PMID: 9472788 DOI: 10.1016/s0926-2040(97)00026-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We have calculated optimal conditions for observing the double quantum coherence of quadrupolar nuclei I = 1 in single crystals and powders after the two and three pulse sequences (theta1)x-tau1-(theta2)alpha-tau2 [-(theta3)beta-tau3] Here alpha and beta are the phase-cycling angles, which were incremented properly to select the desired coherence transfer pathways. Experiments for double quantum excitation and detection were performed on the single crystal and powder samples of NH4ClO4. Because of a fast decay of the signal from the powder after the two-pulse sequence, we employed the third pulse to produce an echo related to the double quantum coherence.
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Affiliation(s)
- E E Ylinen
- Wihuri Physical Laboratory, Department of Physics, University of Turku, Finland
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82
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Lee DK, Ramamoorthy A. A composite pulse sequence for the broadband excitation in overtone 14N NMR spectroscopy. Chem Phys Lett 1997. [DOI: 10.1016/s0009-2614(97)01218-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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83
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Hill EA, Yesinowski JP. Wide-Line 14N NMR in Solids and Reorientation-Induced Redistribution of Isochromats. J Am Chem Soc 1996. [DOI: 10.1021/ja960757j] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Edward A. Hill
- Code 6120, Naval Research Laboratory Washington, D.C. 20375-5342
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84
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Opella SJ, Kim Y, McDonnell P. Experimental nuclear magnetic resonance studies of membrane proteins. Methods Enzymol 1994; 239:536-60. [PMID: 7830598 DOI: 10.1016/s0076-6879(94)39021-5] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- S J Opella
- Department of Chemistry, University of Pennsylvania, Philadelphia 19104
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85
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Grey CP, Veeman WS, Vega AJ. Rotational echo14N/13C/1H triple resonance solid‐state nuclear magnetic resonance: A probe of13C–14N internuclear distances. J Chem Phys 1993. [DOI: 10.1063/1.464579] [Citation(s) in RCA: 143] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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86
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Determinationof the 14N quadrupole coupling tensor of an ℓ-alanine single crystal by overtone NMR. Chem Phys Lett 1993. [DOI: 10.1016/0009-2614(93)80166-m] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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87
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Amoureux JP. High-resolution solid-state NMR for spin 3/2 and 9/2: the multi-quantum transitions method. SOLID STATE NUCLEAR MAGNETIC RESONANCE 1993; 2:83-88. [PMID: 7812746 DOI: 10.1016/0926-2040(93)90066-v] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
A new method of high-resolution NMR for spin 3/2 and 9/2 in the solid-state is proposed: the multi-quantum transitions technique. This method uses MAS (or VAS) in commercially available probeheads. For spin I = 3/2 the observation at 3v0 of samples rotating at 70.12 degrees completely eliminates 1st and 2nd order quadrupolar interactions and scales the shielding anisotropy by a factor of 0.98. For spin I = 9/2, lines observed at 7v0 in the MAS condition are clearly narrower and more separated than the corresponding ones observed at v0.
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Affiliation(s)
- J P Amoureux
- Laboratoire de Dynamique et Structure des Matériaux Moléculaires, URA 801, Université des Sciences et Technologies de Lille, Villeneuve d'Ascq, France
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88
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Goldman M, Grandinetti PJ, Llor A, Olejniczak Z, Sachleben JR, Zwanziger JW. Theoretical aspects of higher‐order truncations in solid‐state nuclear magnetic resonance. J Chem Phys 1992. [DOI: 10.1063/1.463321] [Citation(s) in RCA: 95] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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89
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Grey C, Veeman W. The detection of weak heteronuclear coupling between spin 1 and spin nuclei in MAS NMR; 14N/13C/1H triple resonance experiments. Chem Phys Lett 1992. [DOI: 10.1016/0009-2614(92)85486-t] [Citation(s) in RCA: 62] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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91
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Nakai T, Challoner R, McDowell CA. Forbidden nuclear magnetic resonance transitions between singlet and triplet states in spin-12 pair systems in rotating solids. Chem Phys Lett 1991. [DOI: 10.1016/0009-2614(91)87108-n] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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92
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Thangaraj A, Rajamohanan PR, Suryavanshi PM, Ganapathy S. Location of organic bases and identification of Brønsted acid sites in zeolites by14N solid state NMR. ACTA ACUST UNITED AC 1991. [DOI: 10.1039/c39910000493] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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93
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Howes BD, Pinhal NM, Turner NA, Bray RC, Anger G, Ehrenberg A, Raynor JB, Lowe DJ. Proton electron-nuclear double-resonance spectra of molybdenum(V) in different reduced forms of xanthine oxidase. Biochemistry 1990; 29:6120-7. [PMID: 2169862 DOI: 10.1021/bi00478a002] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Electron-nuclear double-resonance (ENDOR) spectra of protons coupled to molybdenum(V) in reduced xanthine oxidase samples have been recorded. Under appropriate conditions these protons may be studied without interference from protons coupled to reduced iron-sulfur centers. Spectra have been obtained for the molybdenum(V) species known as Rapid, Slow, Inhibited, and Desulfo Inhibited. Resonances corresponding to at least nine protons or sets of protons are observed for all four species, with coupling constants in the range 0.08-4 MHz. Most of these protons do not exchange when 2H2O is used as solvent. Additional protons giving couplings up to 40 MHz are also detected. These correspond to EPR-detectable protons studied in earlier work. The strongly coupled protons may be replaced by 2H, through appropriate use of 2H2O or of 2H-substituted substrates, with consequent disappearance of the 1H resonances. In most cases the corresponding 2H ENDOR features have also been observed. The nature of the various coupled protons is briefly discussed. Results permit specific conclusions to be drawn about the structures of the Inhibited and Desulfo Inhibited species. In particular, the data indicate that the aldehyde residue of the Inhibited species has been oxidized and that the four protons derived from the ethylene glycol molecule in the Desulfo Inhibited species are not all equivalent. Recent assignments [Edmondson, D.E., & D'Ardenne, S.C. (1989) Biochemistry 28, 5924-5930] of the weakly coupled protons in the latter species appear not to be soundly based. The possibility of obtaining more detailed structural information from the spectra is briefly considered.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- B D Howes
- School of Chemistry and Molecular Sciences, University of Sussex, Brighton, U.K
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94
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Ramanathan K, Opella S. High-resolution solid-state 13C14N and 13C15N heteronuclear correlation spectroscopy. ACTA ACUST UNITED AC 1990. [DOI: 10.1016/0022-2364(90)90255-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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95
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Garroway A, Miller J. Demonstration of indirect detection of 14N |δm| = 2 (overtone) NMR transitions. ACTA ACUST UNITED AC 1989. [DOI: 10.1016/0022-2364(89)90221-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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96
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Blümich B, Spiess HW. Zweidimensionale Festkörper-NMR-Spektroskopie: Neue Möglichkeiten zur Untersuchung von Struktur und Dynamik fester Polymere. Angew Chem Int Ed Engl 1988. [DOI: 10.1002/ange.19881001207] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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98
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Ramanathan K, Opella S. Overtone decoupling: The effects of 14N overtone irradiation on 13C NMR spectra of a single crystal. ACTA ACUST UNITED AC 1988. [DOI: 10.1016/0022-2364(88)90284-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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