Measurement of carbonyl chemical shifts of excited protein states by relaxation dispersion NMR spectroscopy: comparison between uniformly and selectively (13)C labeled samples.
Carr-Purcell-Meiboom-Gill (CPMG) relaxation dispersion nuclear magnetic resonance (NMR) spectroscopy has emerged as a powerful method for quantifying chemical shifts of excited protein states. For many applications of the technique that involve the measurement of relaxation rates of carbon magnetiza...
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ftucl:oai:eprints.ucl.ac.uk.OAI2:1308598 2023-05-15T15:52:46+02:00 Measurement of carbonyl chemical shifts of excited protein states by relaxation dispersion NMR spectroscopy: comparison between uniformly and selectively (13)C labeled samples. Lundström, P Hansen, DF Kay, LE 2008-09 http://discovery.ucl.ac.uk/1308598/ eng eng J Biomol NMR , 42 (1) 35 - 47. (2008) Carbon Isotopes Carbonic Acid Molecular Structure Nuclear Magnetic Resonance Biomolecular Proteins Article 2008 ftucl 2013-11-10T04:18:26Z Carr-Purcell-Meiboom-Gill (CPMG) relaxation dispersion nuclear magnetic resonance (NMR) spectroscopy has emerged as a powerful method for quantifying chemical shifts of excited protein states. For many applications of the technique that involve the measurement of relaxation rates of carbon magnetization it is necessary to prepare samples with isolated (13)C spins so that experiments do not suffer from magnetization transfer between coupled carbon spins that would otherwise occur during the CPMG pulse train. In the case of (13)CO experiments however the large separation between (13)CO and (13)C(alpha) chemical shifts offers hope that robust (13)CO dispersion profiles can be recorded on uniformly (13)C labeled samples, leading to the extraction of accurate (13)CO chemical shifts of the invisible, excited state. Here we compare such chemical shifts recorded on samples that are selectively labeled, prepared using [1-(13)C]-pyruvate and NaH(13)CO(3,) or uniformly labeled, generated from (13)C-glucose. Very similar (13)CO chemical shifts are obtained from analysis of CPMG experiments recorded on both samples, and comparison with chemical shifts measured using a second approach establishes that the shifts measured from relaxation dispersion are very accurate. Article in Journal/Newspaper Carbonic acid University College London: UCL Discovery Carr ENVELOPE(130.717,130.717,-66.117,-66.117) |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
English |
topic |
Carbon Isotopes Carbonic Acid Molecular Structure Nuclear Magnetic Resonance Biomolecular Proteins |
spellingShingle |
Carbon Isotopes Carbonic Acid Molecular Structure Nuclear Magnetic Resonance Biomolecular Proteins Lundström, P Hansen, DF Kay, LE Measurement of carbonyl chemical shifts of excited protein states by relaxation dispersion NMR spectroscopy: comparison between uniformly and selectively (13)C labeled samples. |
topic_facet |
Carbon Isotopes Carbonic Acid Molecular Structure Nuclear Magnetic Resonance Biomolecular Proteins |
description |
Carr-Purcell-Meiboom-Gill (CPMG) relaxation dispersion nuclear magnetic resonance (NMR) spectroscopy has emerged as a powerful method for quantifying chemical shifts of excited protein states. For many applications of the technique that involve the measurement of relaxation rates of carbon magnetization it is necessary to prepare samples with isolated (13)C spins so that experiments do not suffer from magnetization transfer between coupled carbon spins that would otherwise occur during the CPMG pulse train. In the case of (13)CO experiments however the large separation between (13)CO and (13)C(alpha) chemical shifts offers hope that robust (13)CO dispersion profiles can be recorded on uniformly (13)C labeled samples, leading to the extraction of accurate (13)CO chemical shifts of the invisible, excited state. Here we compare such chemical shifts recorded on samples that are selectively labeled, prepared using [1-(13)C]-pyruvate and NaH(13)CO(3,) or uniformly labeled, generated from (13)C-glucose. Very similar (13)CO chemical shifts are obtained from analysis of CPMG experiments recorded on both samples, and comparison with chemical shifts measured using a second approach establishes that the shifts measured from relaxation dispersion are very accurate. |
format |
Article in Journal/Newspaper |
author |
Lundström, P Hansen, DF Kay, LE |
author_facet |
Lundström, P Hansen, DF Kay, LE |
author_sort |
Lundström, P |
title |
Measurement of carbonyl chemical shifts of excited protein states by relaxation dispersion NMR spectroscopy: comparison between uniformly and selectively (13)C labeled samples. |
title_short |
Measurement of carbonyl chemical shifts of excited protein states by relaxation dispersion NMR spectroscopy: comparison between uniformly and selectively (13)C labeled samples. |
title_full |
Measurement of carbonyl chemical shifts of excited protein states by relaxation dispersion NMR spectroscopy: comparison between uniformly and selectively (13)C labeled samples. |
title_fullStr |
Measurement of carbonyl chemical shifts of excited protein states by relaxation dispersion NMR spectroscopy: comparison between uniformly and selectively (13)C labeled samples. |
title_full_unstemmed |
Measurement of carbonyl chemical shifts of excited protein states by relaxation dispersion NMR spectroscopy: comparison between uniformly and selectively (13)C labeled samples. |
title_sort |
measurement of carbonyl chemical shifts of excited protein states by relaxation dispersion nmr spectroscopy: comparison between uniformly and selectively (13)c labeled samples. |
publishDate |
2008 |
url |
http://discovery.ucl.ac.uk/1308598/ |
long_lat |
ENVELOPE(130.717,130.717,-66.117,-66.117) |
geographic |
Carr |
geographic_facet |
Carr |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_source |
J Biomol NMR , 42 (1) 35 - 47. (2008) |
_version_ |
1766387868768403456 |