Methods for measurement of intermolecular NOEs by multinuclear NMR spectroscopy: Application to a bacteriophage lambda N-peptide/boxB RNA complex

作者：Zwahlen C; Legault P; Vincent SJF; Greenblatt J; Konrat R; Kay LE

来源：Journal of the American Chemical Society, 1997, 119(29): 6711-6721.

DOI：10.1021/ja970224q

New pulse schemes for recording intermolecular NOEs in a molecular complex consisting of N-15, C-13 labeled and unlabeled components are presented. The pulse sequences select for magnetization transferred from protons on the unlabeled component to proximal protons of the labeled molecule. Filtering (suppression of signal from C-13 labeled molecules) is accomplished using adiabatic C-13 inversion pulses which are swept at a rate which is tuned according to the one-bond H-1-C-13 scalar coupling vs carbon chemical shift profile of the labeled molecule in the complex. Significantly improved spectra are obtained relative to data recorded with other purging schemes: Improvements are demonstrated in experiments where intermolecular NOEs between labeled RNA-unlabeled peptide and labeled protein-unlabeled peptide are recorded. A discussion of structural information obtained for a complex of the amino-terminal arginine rich domain of the N protein from bacteriophage lambda and boxB RNA using the new methodology is presented.

• 出版日期1997-7-23