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- Title
GFT NMR Experiments for Polypeptide Backbone and <sup>13</sup>C<sup>β</sup> Chemical Shift Assignment.
- Authors
Kim, Seho; Szyperski, Thomas
- Abstract
(4,3)D, (5,3)D and (5,2)D GFT triple resonance NMR experiments are presented for polypeptide backbone and 13Cβ resonance assignment of 15N/13C labeled proteins. The joint sampling of m = 2, 3 or 4 indirect chemical shift evolution periods of 4D and 5D NMR experiments yields the measurement of 2m - 1 linear combinations of shifts. To obtain sequential assignments, these are matched in corresponding experiments delineating either intra or interresidue correlations. Hence, an increased set of matches is registered when compared to conventional approaches, and the 4D or 5D information allows one to efficiently break chemical shift degeneracy. Moreover, comparison of single-quantum chemical shifts obtained after a least squares fit using either the intra or the interresidue data demonstrates that GFT NMR warrants highly accurate shift measurements. The new features of GFT NMR based resonance assignment strategies promise to be of particular value for establishing automated protocols.
- Subjects
NUCLEAR magnetic resonance spectroscopy; NUCLEAR magnetic resonance; PEPTIDES; PROTEINS; CHEMICAL reactions; CHARGE transfer; RESONANCE
- Publication
Journal of Biomolecular NMR, 2004, Vol 28, Issue 2, p117
- ISSN
0925-2738
- Publication type
Article
- DOI
10.1023/B:JNMR.0000013827.20574.46