Improved accuracy in measuring one-bond and two-bond 15N,13Cα coupling constants in proteins by double-inphase/antiphase (DIPAP) spectroscopy
Improved accuracy in measuring one-bond and two-bond 15N,13Cα coupling constants in proteins by double-inphase/antiphase (DIPAP) spectroscopy
Abstract An extension to HN(CO-α/β-N,Cα-J)-TROSY (Permi and Annila in J Biomol NMR 16:221â??227, 2000) is proposed that permits the simultaneous determination of the four coupling constants 1 J Nâ?²(i)Cα(i), 2 J HN(i)Cα(i), 2 J Cα(iâ??1)Nâ?²(i), and 3 J Cα(iâ??1)HN(i) in 15N,13C-labeled proteins. Contrasting the original scheme, in which two separate subspectra exhibit the 2 J CαNâ?² coupling as inphase and antiphase splitting (IPAP), we...
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06-10-2011 01:41 AM
Conformational dependence of 13C shielding and coupling constants for methionine
Abstract Methionine residues fulfill a broad range of roles in protein function related to conformational plasticity, ligand binding, and sensing/mediating the effects of oxidative stress. A high degree of internal mobility, intrinsic detection sensitivity of the methyl group, and low copy number have made methionine labeling a popular approach for NMR investigation of selectively labeled protein macromolecules. However, selective labeling approaches are subject to more limited information content. In order to optimize the information available from such studies, we have performed DFT...
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08-25-2010 03:51 PM
[NMR paper] Direct measurement of angles between bond vectors in high-resolution NMR.
Direct measurement of angles between bond vectors in high-resolution NMR.
http://www.ncbi.nlm.nih.gov/corehtml/query/egifs/http:--highwire.stanford.edu-icons-externalservices-pubmed-custom-sci_full_freeReg.gif Related Articles Direct measurement of angles between bond vectors in high-resolution NMR.
Science. 1997 May 23;276(5316):1230-3
Authors: Reif B, Hennig M, Griesinger C
Angles between two interatomic vectors are measured for structure elucidation in solution nuclear magnetic resonance (NMR). The angles can be determined directly by using...
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08-22-2010 03:31 PM
[NMR paper] Direct measurement of angles between bond vectors in high-resolution NMR.
Direct measurement of angles between bond vectors in high-resolution NMR.
http://www.ncbi.nlm.nih.gov/corehtml/query/egifs/http:--highwire.stanford.edu-icons-externalservices-pubmed-custom-sci_full_freeReg.gif Related Articles Direct measurement of angles between bond vectors in high-resolution NMR.
Science. 1997 May 23;276(5316):1230-3
Authors: Reif B, Hennig M, Griesinger C
Angles between two interatomic vectors are measured for structure elucidation in solution nuclear magnetic resonance (NMR). The angles can be determined directly by using...
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08-22-2010 03:03 PM
[NMR paper] The impact of direct refinement against proton chemical shifts on protein structure d
The impact of direct refinement against proton chemical shifts on protein structure determination by NMR.
Related Articles The impact of direct refinement against proton chemical shifts on protein structure determination by NMR.
J Magn Reson B. 1995 Jun;107(3):293-7
Authors: Kuszewski J, Gronenborn AM, Clore GM
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08-22-2010 03:41 AM
[NMR paper] The impact of direct refinement against three-bond HN-C alpha H coupling constants on
The impact of direct refinement against three-bond HN-C alpha H coupling constants on protein structure determination by NMR.
Related Articles The impact of direct refinement against three-bond HN-C alpha H coupling constants on protein structure determination by NMR.
J Magn Reson B. 1994 May;104(1):99-103
Authors: Garrett DS, Kuszewski J, Hancock TJ, Lodi PJ, Vuister GW, Gronenborn AM, Clore GM
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08-22-2010 03:33 AM
[U. of Ottawa NMR Facility Blog] E.COSY and the Relative Signs of Coupling Constants
E.COSY and the Relative Signs of Coupling Constants
Spin-spin coupling constants can have values greater than or less than zero. The absolute sign of the coupling constants cannot be discerned from the simple examination of a 1H NMR spectrum. The E.COSY1 (Exclusive COrrelation SpectroscopY) technique is one method which can be used to determine the relative signs of coupling constants. E.COSY is a phase sensitive COSY variant which produces off-diagonal signals showing only the active coupling (i.e. the coupling directly responsible for the cross-peak) as 2x2 antiphase square tetrads...