Abstract We describe here, adaptation of the HNN pulse sequence for multiple nuclei detection using two independent receivers by utilizing the detectable 13Cα transverse magnetization which was otherwise dephased out in the conventional HNN experiment. It enables acquisition of 2D 13Cαâ??15N sequential correlations along with the standard 3D 15Nâ??15Nâ??1H correlations, which provides directionality to sequential walk in HNN, on one hand, and enhances the speed of backbone assignment, on the other. We foresee that the implementation of dual direct detection opens up new avenues for a wide variety of modifications that would further enhance the value and applications of the experiment, and enable derivation of hitherto impossible information.
Content Type Journal Article
Category Communication
Pages 1-6
DOI 10.1007/s10858-011-9596-z
Authors
Swagata Chakraborty, Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai, 400005 India
Subhradip Paul, Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai, 400005 India
Ramakrishna V. Hosur, Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai, 400005 India
Simultaneous measurement of 1Hâ??15N and Methyl 1Hmâ??13Cm residual dipolar couplings in large proteins
Simultaneous measurement of 1Hâ??15N and Methyl 1Hmâ??13Cm residual dipolar couplings in large proteins
Abstract A two-dimensional TROSY-based SIM-13Cmâ??1Hm/1Hâ??15N NMR experiment for simultaneous measurements of methyl 1 D CH and backbone amide 1 D NH residual dipolar couplings (RDC) in {U-; Ileδ1-; Leu,Val-}-labeled samples of large proteins is described. Significant variation in the alignment tensor of the 82-kDa enzyme Malate synthase G is observed as a function of only slight changes in experimental conditions. The SIM-13Cmâ??1Hm/1Hâ??15N data sets provide convenient means...
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09-30-2011 08:01 PM
Side-chain to backbone correlations from solid-state NMR of perdeuterated proteins through combined excitation and long-range magnetization transfers
Side-chain to backbone correlations from solid-state NMR of perdeuterated proteins through combined excitation and long-range magnetization transfers
Abstract Proteins with excessive deuteration give access to proton detected solid-state NMR spectra of extraordinary resolution and sensitivity. The high spectral quality achieved after partial proton back-exchange has been shown to start a new era for backbone assignment, protein structure elucidation, characterization of protein dynamics, and access to protein parts undergoing motion. The large absence of protons at non-exchangeable...
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08-11-2011 02:24 AM
Side-chain to backbone correlations from solid-state NMR of perdeuterated proteins through combined excitation and long-range magnetization transfers.
Side-chain to backbone correlations from solid-state NMR of perdeuterated proteins through combined excitation and long-range magnetization transfers.
Side-chain to backbone correlations from solid-state NMR of perdeuterated proteins through combined excitation and long-range magnetization transfers.
J Biomol NMR. 2011 Aug 7;
Authors: Linser R
Proteins with excessive deuteration give access to proton detected solid-state NMR spectra of extraordinary resolution and sensitivity. The high spectral quality achieved after partial proton back-exchange...
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08-09-2011 12:11 PM
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
Detecting the "Afterglow" of (13)C NMR in Proteins Using Multiple Receivers.
Detecting the "Afterglow" of (13)C NMR in Proteins Using Multiple Receivers.
Related Articles Detecting the "Afterglow" of (13)C NMR in Proteins Using Multiple Receivers.
J Am Chem Soc. 2010 Dec 2;
Authors: Kupc?e E, Kay LE, Freeman R
We show that the weak signal that remains after (13)C-detected experiments (the (13)C "afterglow") can still be measured with high sensitivity by proton detection. This is illustrated by the incorporation of two experiments, 2D (HA)CACO and 3D (HA)CA(CO)NNH, into a single pulse sequence that makes use of two receivers...
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12-04-2010 07:24 PM
Detecting the “Afterglow” of 13C NMR in Proteins Using Multiple Receivers
Detecting the “Afterglow” of 13C NMR in Proteins Using Multiple Receivers
E?riks Kupc?e, Lewis E. Kay and Ray Freeman
http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/0/jacsat.ahead-of-print/ja1080025/aop/images/medium/ja-2010-080025_0002.gif
Journal of the American Chemical Society
DOI: 10.1021/ja1080025
http://feeds.feedburner.com/~ff/acs/jacsat?d=yIl2AUoC8zA
http://feeds.feedburner.com/~r/acs/jacsat/~4/YNH74d-9ntc
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12-03-2010 08:52 AM
Sequential nearest-neighbor effects on computed 13Cα chemical shifts
Abstract To evaluate sequential nearest-neighbor effects on quantum-chemical calculations of 13Cα chemical shifts, we selected the structure of the nucleic acid binding (NAB) protein from the SARS coronavirus determined by NMR in solution (PDB id 2K87). NAB is a 116-residue α/β protein, which contains 9 prolines and has 50% of its residues located in loops and turns. Overall, the results presented here show that sizeable nearest-neighbor effects are seen only for residues preceding proline, where Pro introduces an overestimation, on average, of 1.73 ppm in the computed 13Cα chemical...
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08-14-2010 04:19 AM
Simultaneous detection of amide and methyl correlations using a time shared NMR experiment: application to binding epitope mapping
Simultaneous detection of amide and methyl correlations using a time shared NMR experiment: application to binding epitope mapping
Peter Würtz, Olli Aitio, Maarit Hellman and Perttu Permi
Journal of Biomolecular NMR; 2007; 39(2) pp 97 - 105
Abstract:
Simultaneous recording of different NMR parameters is an efficient way to reduce the overall experimental time and speed up structural studies of biological macromolecules. This can especially be beneficial in the case of fast NMR-based drug screening applications or for collecting NOE restraints, where prohibitively long data collection...
Simultaneous acquisition of 13Cαâ??15N and 1Hâ??15Nâ??15N sequential correlations in proteins: application of dual receivers in 3D HNN
Linear Mode
