Homonuclear decoupling for enhancing resolution and sensitivity in NOE and RDC measurements of peptides and proteins.

ABSTRACT: Application of band-selective homonuclear (BASH) (1)H decoupling pulses during acquisition of the (1)H free induction decay is shown to be an efficient procedure for removal of scalar and residual dipolar couplings between amide and aliphatic protons. BASH decoupling can be applied in both dimensions of a homonuclear 2D NMR experiment and is particularly useful for enhancing spectral resolution in the H(N)-H(α) region of NOESY spectra of peptides and proteins, which contain important information on the backbone torsion angles. The method then also prevents generation of zero quantum and Hz(N)-Hz(α) terms, thereby facilitating analysis of intraresidue interactions. Application to the NOESY spectrum of a hexapeptide fragment of the intrinsically disordered protein α-synuclein highlights the

SUBMITTER: Ying J 

PROVIDER: S-EPMC3965638 | biostudies-literature | 2014 Apr

REPOSITORIES: biostudies-literature