Abstract
We present an approach that accelerates protein solid-state NMR 5–20-fold using paramagnetic doping to condense data-collection time (to ∼0.2 s per scan), overcoming a long-standing limitation on slow recycling owing to intrinsic 1H T1 longitudinal spin relaxation. Using low-power schemes under magic-angle spinning at 40 kHz, we obtained two-dimensional 13C-13C and 13C-15N solid-state NMR spectra for several to tens of nanomoles of β-amyloid fibrils and ubiquitin in 1–2 d.
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Acknowledgements
This work was supported in part by the Dreyfus Foundation Teacher-Scholar Award program, the US National Science Foundation (CAREER; CHE 449952), Alzheimer's Association (IIRG; 08-91256) and the National Institutes of Health RO1 program (AG028490) to Y.I., and Estonian Science foundation programs to A.S. We thank R. Tycko (National Institutes of Health) for providing a structural model6 used for Figure 3.
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N.P.W. and Y.I. designed the experiments. N.P.W., S.P., C.R.J., C.B., F.L., M.K. and Y.I. performed the experiments. J.P. and A.S. constructed the NMR probe. F.L., S.M. and L.W.-M.F. established the expression system of α-spectrin II. N.P.W. and Y.I. wrote the paper.
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Supplementary Figures 1–8, Supplementary Table 1, Supplementary Methods, Supplementary Data (PDF 1841 kb)
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Wickramasinghe, N., Parthasarathy, S., Jones, C. et al. Nanomole-scale protein solid-state NMR by breaking intrinsic 1H T1 boundaries. Nat Methods 6, 215–218 (2009). https://doi.org/10.1038/nmeth.1300
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DOI: https://doi.org/10.1038/nmeth.1300
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