Resolution Enhancement by Homonuclear J-decoupling: Application to Three-dimensional Solid-state Magic Angle Spinning NMR Spectroscopy
Overview
Nuclear Medicine
Affiliations
We describe a simple protocol to achieve homonuclear J-decoupling in the indirect dimensions of multidimensional experiments, and to enhance spectral resolution of the backbone Calpha carbons in the 3D NCACX experiment. In the proposed protocol, the refocusing of the Calpha-CO homonuclear J-couplings is achieved by applying an off-resonance selective pi pulse to the CO spectral region in the middle of Calpha chemical shift evolution. As is commonly used in solution NMR, a compensatory echo period is used to refocus the unwanted chemical shift evolution of Calpha spins, which takes place during the off-resonance selective pulse. The experiments were carried out on the beta1 immunoglobulin binding domain of protein G (GB1). In GB1, such implementation results in significantly reduced line widths, and leads to an overall sensitivity enhancement.
Biomaterial Property Effects on Platelets and Macrophages: An in Vitro Study.
Fernandes K, Zhang Y, Magri A, Renno A, van den Beucken J ACS Biomater Sci Eng. 2017; 3(12):3318-3327.
PMID: 29250594 PMC: 5727470. DOI: 10.1021/acsbiomaterials.7b00679.
Eddy M, Su Y, Silvers R, Andreas L, Clark L, Wagner G J Biomol NMR. 2015; 61(3-4):299-310.
PMID: 25634301 PMC: 4398622. DOI: 10.1007/s10858-015-9903-1.
Struppe J, Yang C, Wang Y, Hernandez R, Shamansky L, Mueller L J Magn Reson. 2013; 236:89-94.
PMID: 24095840 PMC: 4017862. DOI: 10.1016/j.jmr.2013.09.001.
Asami S, Szekely K, Schanda P, Meier B, Reif B J Biomol NMR. 2012; 54(2):155-68.
PMID: 22915373 DOI: 10.1007/s10858-012-9659-9.
van der Wel P, Eddy M, Ramachandran R, Griffin R Chemphyschem. 2009; 10(9-10):1656-63.
PMID: 19565580 PMC: 4440578. DOI: 10.1002/cphc.200900102.