Cross-correlation suppressed T1 and NOE experiments for protein side-chain 13CH2 groups

Changwen Jin, J.J. Prompers, R. Brüschweiler

Research output: Contribution to journalArticleAcademicpeer-review

10 Citations (Scopus)

Abstract

Relaxation measurements of side-chain 13CH2-groups of uniformly 13C labeled human ubiquitin were performed at 600 MHz and 800 MHz magnetic field strength at 30°C. Dipole-dipole cross-correlated relaxation effects in T1 experiments were suppressed by the combination of radio-frequency pulses and pulsed field gradients during the relaxation delay leading to monoexponential relaxation decays that allow a more accurate extraction of the 13C T1 relaxation times. Heteronuclear 1H-13C NOEs obtained by using different proton saturation schemes indicate that the influence of cross-correlation is small. The experimental T1 and NOE data were interpreted in a model-free way in terms of a generalized order parameter and an internal correlation time.
Original languageEnglish
Pages (from-to)241-247
JournalJournal of Biomolecular NMR
Volume26
Issue number3
DOIs
Publication statusPublished - 2003

Fingerprint Dive into the research topics of 'Cross-correlation suppressed T1 and NOE experiments for protein side-chain 13CH2 groups'. Together they form a unique fingerprint.

Cite this