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Prions: En route from structural models to structures Bockmann A; Meier BHPrion 2010[Apr]; 4 (2): 72-9The prion hypothesis states that the prion and non-prion form of a protein differ only in their 3D conformation and that different strains of a prion differ by their 3D structure. Recent technical developments have enabled solid-state NMR to address the atomic-resolution structures of full-length prions, and a first comparative study of two of them, HET-s and Ure2p, in fibrillar form, has recently appeared as a pair of companion papers. Interestingly, the two structures are rather different: HET-s features an exceedingly well-ordered prion domain and a partially disordered globular domain. Ure2p in contrast features a very well ordered globular domain with a conserved fold, and-most probably-a partially ordered prion domain. For HET-s, the structure of the prion domain is characterized at atomic-resolution. For Ure2p, structure determination is under way, but the highly resolved spectra clearly show that information at atomic resolution should be achievable.|Amyloid/chemistry[MESH]|Humans[MESH]|Models, Molecular[MESH]|Nuclear Magnetic Resonance, Biomolecular/methods[MESH]|Prions/*chemistry[MESH]|Protein Conformation[MESH] |
