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Volumn 115, Issue 24, 2011, Pages 7788-7798

15N solid-state NMR as a probe of flavin H-bonding

Author keywords

[No Author keywords available]

Indexed keywords

CHEMICAL SHIFT; COENZYMES; DENSITY FUNCTIONAL THEORY; ELECTRONIC PROPERTIES; ELECTRONIC STRUCTURE; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; PROBES; SOLID STATE PHYSICS;

EID: 79959349864     PISSN: 15206106     EISSN: 15205207     Source Type: Journal    
DOI: 10.1021/jp202138d     Document Type: Article
Times cited : (20)

References (84)
  • 1
    • 84906375097 scopus 로고    scopus 로고
    • Abbreviations: BSSE, basis set superposition error; calcd, calculated; CP, cross polarization; CSPVs, chemical shift tensor principle values; DBAP, dibenzylamidopyridine; DFT, density functional theory; exptl, experimental; FAD, flavin adenine dinucleotide; FMN, flavin mononucleotide; GIAO, gauge including atomic orbitals; H-bond, hydrogen bond; LF, lumiflavin; MAS, magic angle spinning; MD, molecular dynamics; NBO, natural bond order; NPA, natural population analysis; SSNMR, solid state NMR; TARF, tetraacetylriboflavin; TPARF, tetraphenylacetylriboflavin
    • Abbreviations: BSSE, basis set superposition error; calcd, calculated; CP, cross polarization; CSPVs, chemical shift tensor principle values; DBAP, dibenzylamidopyridine; DFT, density functional theory; exptl, experimental; FAD, flavin adenine dinucleotide; FMN, flavin mononucleotide; GIAO, gauge including atomic orbitals; H-bond, hydrogen bond; LF, lumiflavin; MAS, magic angle spinning; MD, molecular dynamics; NBO, natural bond order; NPA, natural population analysis; SSNMR, solid state NMR; TARF, tetraacetylriboflavin; TPARF, tetraphenylacetylriboflavin.
  • 27
    • 84906389036 scopus 로고    scopus 로고
    • 22)/2, where the δ values are the principal values of either the chemical shift anisotropy tensor or the chemical shift tensor. Because the current work discusses the values of individual chemical shift tensor principal values, we employ the term chemical shift (tensor) principal value or CSPV, instead
    • 22)/2, where the δ values are the principal values of either the chemical shift anisotropy tensor or the chemical shift tensor. Because the current work discusses the values of individual chemical shift tensor principal values, we employ the term chemical shift (tensor) principal value or CSPV, instead.
  • 28
    • 84906375098 scopus 로고    scopus 로고
    • 33
    • 33.
  • 34
    • 84906360825 scopus 로고    scopus 로고
    • For the purposes of this paper, HOMO denotes several highest-lying occupied molecular orbitals, not just the one that lies highest of all, as symmetry and localization differences can be as important as the energy in determining which HOMO is reactive. Similarly, LUMO denotes several lowest-lying unoccupied molecular orbitals
    • For the purposes of this paper, HOMO denotes several highest-lying occupied molecular orbitals, not just the one that lies highest of all, as symmetry and localization differences can be as important as the energy in determining which HOMO is reactive. Similarly, LUMO denotes several lowest-lying unoccupied molecular orbitals.
  • 45
    • 79959356543 scopus 로고    scopus 로고
    • Doctoral, The Johns Hopkins Universisty
    • Walsh, J. D. Doctoral, The Johns Hopkins Universisty, 2003.
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    • Walsh, J.D.1
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    • HBA ver. 1.6, a program for performing Herzfeld-Berger Analysis
    • Eichele, K.; Wasylishen, R. E. HBA ver. 1.6, a program for performing Herzfeld-Berger Analysis; 2010, http://anorganik.uni-tuebingen.de/klaus/soft/ index.php?p=hba/hba.
    • (2010)
    • Eichele, K.1    Wasylishen, R.E.2
  • 53
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    • Gaussian, Inc.: Wallingford, CT,. The full reference is given in the Supporting Information
    • Frisch, M. J. Gaussian 03; Gaussian, Inc.: Wallingford, CT, 2004. The full reference is given in the Supporting Information.
    • (2004) Gaussian 03
    • Frisch, M.J.1
  • 62
    • 84906360824 scopus 로고    scopus 로고
    • Counterpoise corrected complex energies could only be performed without SCRF
    • Counterpoise corrected complex energies could only be performed without SCRF.
  • 65
    • 84906375092 scopus 로고    scopus 로고
    • Stacking interactions can occur between flavins; however, we anticipate that the great excess of benzene will outcompete flavin stacking
    • Stacking interactions can occur between flavins; however, we anticipate that the great excess of benzene will outcompete flavin stacking.
  • 66
    • 84906403771 scopus 로고    scopus 로고
    • The isotropic average from the SSNMR of TPARF + DBAP was 347.5 0.8 ppm vs 349.8 ppm for TPARF + DBAP in solution
    • The isotropic average from the SSNMR of TPARF + DBAP was 347.5 0.8 ppm vs 349.8 ppm for TPARF + DBAP in solution.
  • 67
    • 84906389033 scopus 로고    scopus 로고
    • A small excess of DBAP powder could be seen in suspension prior to freezing
    • A small excess of DBAP powder could be seen in suspension prior to freezing.
  • 68
    • 84906403772 scopus 로고    scopus 로고
    • The structure of the TPARF/DBAP complex has not been determined crystallographically, nor has that of TARF/DAP. However, the structure is validated by NMR spectroscopy and the fact that our geometry optimizations retain the proposed structure and yield calculated CSPVs that agree with experiment
    • The structure of the TPARF/DBAP complex has not been determined crystallographically, nor has that of TARF/DAP. However, the structure is validated by NMR spectroscopy and the fact that our geometry optimizations retain the proposed structure and yield calculated CSPVs that agree with experiment.
  • 70
    • 84906389034 scopus 로고    scopus 로고
    • This is in part a reflection of the extreme sensitivity of NMR shieldings to geometry and interactions with the environment
    • This is in part a reflection of the extreme sensitivity of NMR shieldings to geometry and interactions with the environment.
  • 83
    • 84906389035 scopus 로고    scopus 로고
    • Our calculations nonetheless suggest that we would not expect much larger effects even if the TPARF were not subject to dimerization in solution
    • Our calculations nonetheless suggest that we would not expect much larger effects even if the TPARF were not subject to dimerization in solution.


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