High-resolution local field spectroscopy with internuclear correlations.
Establishing correlations among distant (>3A) spins remains an outstanding problem for both spectral assignment and elucidation of interhelical contacts in solid-state NMR of oriented membrane proteins. Here we present a pulse sequence which incorporates the previously established mismatched Hartmann-Hahn mixing of dilute spins via the proton bath together with high-resolution local field spectroscopy. In addition to providing structural information, the use of dipolar couplings in the indirect dimension helps eliminate the spectral crowdedness compared to the standard homonuclear correlation techniques. The proposed pulse sequence may find its use in assigning protein spectra in uniaxially oriented membrane environments.
Nevzorov
Alexander A
AA
Department of Chemistry, North Carolina State University, Raleigh, NC 27695-8204, USA. alex_nevzorov@ncsu.edu
D000465:Algorithms; D004578:Electron Spin Resonance Spectroscopy; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008565:Membrane Proteins / Q000737:chemistry*; D008566:Membranes / Q000737:chemistry; D011522:Protons
D008565:Membrane Proteins; D011522:Protons