Side-chain carbon resonance assignments are difficult to obtain for larger proteins. While standard methods require protons for excitation and detection of magnetization, their presence is often unacceptable and often leads to unacceptable relaxation losses at the directly bound carbon sites. In thi
Unambiguous Correlations of Backbone Amide and Aliphatic Gamma Resonances in Deuterated Proteins
β Scribed by Scott A. McCallum; T.K. Hitchens; Gordon S. Rule
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 267 KB
- Volume
- 134
- Category
- Article
- ISSN
- 1090-7807
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β¦ Synopsis
Two 3D NMR pulse sequences that correlate aliphatic gamma carbon resonance frequencies to amide proton and nitrogen chemical shifts in perdeuterated proteins are presented. The HN(CO-CACB)CG provides only interresidue connectivities (NH (i) and C β₯(i-1) ) while the HN(CACB)CG detects both the inter-and intraresidue (NH (i) and C β₯(i) or C β₯(iΨ1) ) correlations. These two experiments are useful for sequential assignments and the identification of residue type from the C β₯ shifts. Spectra acquired on a perdeuterated 53-kDa protein illustrate the sensitivity and utility of these experiments.
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We thank Claude Klee for help and encouragement in our study of calcineurin B, Hao Ren for protein expression, and Marius Clore and Dennis Torchia for useful discussions. This work was supported by the AIDS Targeted Anti-Viral Program of the Office of the Director of the National Institutes of Healt
The development of multidimensional triple-resonance i.e., the delays and field strengths of the RF pulses. The coherence flow can be described by NMR techniques has enabled us to study the solution structures of proteins with molecular masses smaller than 25 kDa (1-3). Among the experiments, the th
Recently, a novel three-dimensional, triple-resonance ex-respect to the nitrogen, which then evolves into in-phase periment was described which correlates intraresidue 13 CO, carbonyl magnetization again. Evolution under the 1 J CaCO 13