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From Proteopedia
High-resolution structure of the HET-s(218-289) prion in its amyloid form obtained by solid-state NMR
Structural highlights
FunctionHETS_PODAS Responsible for heterokaryon incompatibility, a process that ensures that during spontaneous, vegetative cell fusion only compatible cells from the same colony survive (non-self-recognition). Forms a prion for the non-Mendelian trait [het-s]. Interacts with het-S from incompatible cells to trigger a lethal reaction that prevents the formation of viable heterokaryons. It is unknown if the native, soluble protein has a cellular function.[1] [2] [3] Publication Abstract from PubMedWe present a strategy to solve the high-resolution structure of amyloid fibrils by solid-state NMR and use it to determine the atomic-resolution structure of the prion domain of the fungal prion HET-s in its amyloid form. On the basis of 134 unambiguous distance restraints, we recently showed that HET-s(218-289) in its fibrillar state forms a left-handed beta-solenoid, and an atomic-resolution NMR structure of the triangular core was determined from unambiguous restraints only. In this paper, we go considerably further and present a comprehensive protocol using six differently labeled samples, a collection of optimized solid-state NMR experiments, and adapted structure calculation protocols. The high-resolution structure obtained includes the less ordered but biologically important C-terminal part and improves the overall accuracy by including a large number of ambiguous distance restraints. Atomic-Resolution Three-Dimensional Structure of HET-s(218-289) Amyloid Fibrils by Solid-State NMR Spectroscopy.,Van Melckebeke H, Wasmer C, Lange A, Ab E, Loquet A, Bockmann A, Meier BH J Am Chem Soc. 2010 Sep 9. PMID:20828131[4] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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