TY - JOUR
T1 - GFT projection NMR spectroscopy for proteins in the solid state
AU - Franks, W. Trent
AU - Atreya, Hanudatta S.
AU - Szyperski, Thomas
AU - Rienstra, Chad M.
N1 - Acknowledgments The authors thank the National Institute of Health for funding through NIGMS NIGMS/Roadmap Initiative (R01GM075937 and R01GM073770 to C.R.) and the National Science Foundation (MCB 0817857 to T.S.), and Lindsay J. Sperling and Andrew J. Nieuwkoop for assistance in preparing the manuscript.
PY - 2010/12
Y1 - 2010/12
N2 - Recording of four-dimensional (4D) spectra for proteins in the solid state has opened new avenues to obtain virtually complete resonance assignments and threedimensional (3D) structures of proteins. As in solution state NMR, the sampling of three indirect dimensions leads per se to long minimal measurement time. Furthermore, artifact suppression in solid state NMR relies primarily on radiofrequency pulse phase cycling. For an n-step phase cycle, the minimal measurement times of both 3D and 4D spectra are increased n times. To tackle the associated 'sampling problem' and to avoid sampling limited data acquisition, solid state G-Matrix Fourier Transform (SS GFT) projection NMR is introduced to rapidly acquire 3D and 4D spectral information. Specifically, (4,3)D (HA)CANCOCX and (3,2)D (HACA)NCOCX were implemented and recorded for the 6 kDa protein GB1 within about 10% of the time required for acquiring the conventional congeners with the same maximal evolution times and spectral widths in the indirect dimensions. Spectral analysis was complemented by comparative analysis of expected spectral congestion in conventional and GFT NMR experiments, demonstrating that high spectral resolution of the GFT NMR experiments enables one to efficiently obtain nearly complete resonance assignments even for large proteins.
AB - Recording of four-dimensional (4D) spectra for proteins in the solid state has opened new avenues to obtain virtually complete resonance assignments and threedimensional (3D) structures of proteins. As in solution state NMR, the sampling of three indirect dimensions leads per se to long minimal measurement time. Furthermore, artifact suppression in solid state NMR relies primarily on radiofrequency pulse phase cycling. For an n-step phase cycle, the minimal measurement times of both 3D and 4D spectra are increased n times. To tackle the associated 'sampling problem' and to avoid sampling limited data acquisition, solid state G-Matrix Fourier Transform (SS GFT) projection NMR is introduced to rapidly acquire 3D and 4D spectral information. Specifically, (4,3)D (HA)CANCOCX and (3,2)D (HACA)NCOCX were implemented and recorded for the 6 kDa protein GB1 within about 10% of the time required for acquiring the conventional congeners with the same maximal evolution times and spectral widths in the indirect dimensions. Spectral analysis was complemented by comparative analysis of expected spectral congestion in conventional and GFT NMR experiments, demonstrating that high spectral resolution of the GFT NMR experiments enables one to efficiently obtain nearly complete resonance assignments even for large proteins.
KW - Chemical shift assignments
KW - Correlation spectroscopy
KW - GB1
KW - Magic-angle spinning
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U2 - 10.1007/s10858-010-9451-7
DO - 10.1007/s10858-010-9451-7
M3 - Article
C2 - 21052779
AN - SCOPUS:78651277034
SN - 0925-2738
VL - 48
SP - 213
EP - 223
JO - Journal of Biomolecular NMR
JF - Journal of Biomolecular NMR
IS - 4
ER -