NR ANKD
AU Sunde,M.; Serpell,L.C.; Bartlam,M.; Fraser,P.E.; Pepys,M.B.; Blake,C.C.
TI Common core structure of amyloid fibrils by synchrotron X-ray diffraction
QU Journal of Molecular Biology 1997 Oct 31; 273(3): 729-39
PT journal article
AB Tissue deposition of normally soluble proteins as insoluble amyloid fibrils is associated with serious diseases including the systemic amyloidoses, maturity onset diabetes, Alzheimer's disease and transmissible spongiform encephalopathy. Although the precursor proteins in different diseases do not share sequence homology or related native structure, the morphology and properties of all amyloid fibrils are remarkably similar. Using intense synchrotron sources we observed that six different ex vivo amyloid fibrils and two synthetic fibril preparations all gave similar high-resolution X-ray fibre diffraction patterns, consistent with a helical array of beta-sheets parallel to the fibre long axis, with the strands perpendicular to this axis. This confirms that amyloid fibrils comprise a structural superfamily and share a common protofilament substructure, irrespective of the nature of their precursor proteins.
MH Amyloid/*chemistry; Human; Models, Molecular; Protein Conformation; Support, Non-U.S. Gov't; X-Ray Diffraction
AD University of Oxford, Rex Richards Building, South Parks Road, Oxford, OX1 3QU, UK
SP englisch
PO England