Solid-state NMR sequential assignments of the amyloid core of Sup35pNM
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Sup35pNM represents the N-terminal and middle (M) domains of the yeast Saccharomyces cerevisiae prion Sup35p. This fragment is commonly used for structural and functional studies of Sup35p. We here present a solid-state NMR study of fibrils formed by this fragment and show that sequential assignments can be obtained for the rigid and well-ordered parts of the protein using 3D spectroscopy. We describe in detail the sequential assignment of the 22 residues yielding strong, narrow signals with chemical shifts that correspond mostly to β-sheet secondary-structured amino acids that form the fibril core.
KeywordsSup35pNM Fibrils Solid-state NMR Assignments Secondary structure
We thank Dr. Christian Wasmer for help with recording the spectra. This work was supported by the Agence Nationale de la Recherche (ANR-12-BS08-0013-01), the ETH Zurich, the Swiss National Science Foundation (Grant 200020_124611) and the Centre National de la Recherche Scientifique. We also acknowledge support from the European Commission under the Seventh Framework Programme (FP7), contract Bio-NMR 261863.
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