Epitopes described in "Probing the N-terminal β-sheet conversion in the crystal structure of the human prion protein bound to a nanobody."

Article Authors:Romany N N Abskharon; Gabriele Giachin; Alexandre Wohlkonig; Sameh H Soror; Els Pardon; Giuseppe Legname; Jan Steyaert
Article Title:Probing the N-terminal β-sheet conversion in the crystal structure of the human prion protein bound to a nanobody.
Reference Detail
Reference ID:1027191
Abstract:Prions are fatal neurodegenerative transmissible agents causing several incurable illnesses in humans and animals. Prion diseases are caused by the structural conversion of the cellular prion protein, PrP(C), into its misfolded oligomeric form, known as prion or PrP(Sc). The canonical human PrP(C) (HuPrP) fold features an unstructured N-terminal part (residues 23-124) and a well-defined C-terminal globular domain (residues 125-231). Compelling evidence indicates that an evolutionary N-terminal conserved motif AGAAAAGA (residues 113-120) plays an important role in the conversion to PrP(Sc). The intrinsic flexibility of the N-terminal has hampered efforts to obtain detailed atomic information on the structural features of this palindromic region. In this study, we crystallized the full-length HuPrP in complex with a nanobody (Nb484) that inhibits prion propagation. In the complex, the prion protein is unstructured from residue 23 to 116. The palindromic motif adopts a stable and fully extended configuration to form a three-stranded antiparallel -sheet with the 1 and 2 strands, demonstrating that the full-length HuPrP(C) can adopt a more elaborate 0-1-1-2-2-3 structural organization than the canonical 1-1-2-2-3 prion-like fold. From this structure, it appears that the palindromic motif mediates -enrichment in the PrP(C) monomer as one of the early events in the conversion of PrP(C) into PrP(Sc).
Reference Type:Literature
PubMed ID:24400836
Journal:J Am Chem Soc
Journal Volume:136
Article Pages:937-44
Journal ISSN:0002-7863
Article Chemical List:Peptide Fragments;Prions;Single-Domain Antibodies
Article MeSH List:Animals; Cell Line; Crystallography, X-Ray; Humans; Mice; Models, Molecular; Peptide Fragments(chemistry; metabolism); Prions(chemistry; metabolism); Protein Binding; Protein Folding; Protein Stability; Protein Structure, Secondary; Single-Domain Antibodies(metabolism)
Curation Last Updated:2014-10-19 20:04:42