PDBsum entry 2okz

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Protein fibril PDB id
PDB id:
Name: Protein fibril
Title: Mvggvv peptide derived from alzheimer's a-beta
Structure: Peptide from alzheimer's a-beta. Chain: a, b. Fragment: residues 35-40. Engineered: yes
Source: Synthetic: yes. Other_details: this sequence corresponds to residues 35-40 of human a-beta peptide
1.80Å     R-factor:   0.217     R-free:   0.267
Authors: M.R.Sawaya,S.Sambashivan,D.Eisenberg
Key ref:
M.R.Sawaya et al. (2007). Atomic structures of amyloid cross-beta spines reveal varied steric zippers. Nature, 447, 453-457. PubMed id: 17468747 DOI: 10.1038/nature05695
18-Jan-07     Release date:   30-Jan-07    


DOI no: 10.1038/nature05695 Nature 447:453-457 (2007)
PubMed id: 17468747  
Atomic structures of amyloid cross-beta spines reveal varied steric zippers.
M.R.Sawaya, S.Sambashivan, R.Nelson, M.I.Ivanova, S.A.Sievers, M.I.Apostol, M.J.Thompson, M.Balbirnie, J.J.Wiltzius, H.T.McFarlane, A...Madsen, C.Riekel, D.Eisenberg.
Amyloid fibrils formed from different proteins, each associated with a particular disease, contain a common cross-beta spine. The atomic architecture of a spine, from the fibril-forming segment GNNQQNY of the yeast prion protein Sup35, was recently revealed by X-ray microcrystallography. It is a pair of beta-sheets, with the facing side chains of the two sheets interdigitated in a dry 'steric zipper'. Here we report some 30 other segments from fibril-forming proteins that form amyloid-like fibrils, microcrystals, or usually both. These include segments from the Alzheimer's amyloid-beta and tau proteins, the PrP prion protein, insulin, islet amyloid polypeptide (IAPP), lysozyme, myoglobin, alpha-synuclein and beta(2)-microglobulin, suggesting that common structural features are shared by amyloid diseases at the molecular level. Structures of 13 of these microcrystals all reveal steric zippers, but with variations that expand the range of atomic architectures for amyloid-like fibrils and offer an atomic-level hypothesis for the basis of prion strains.
  Selected figure(s)  
Figure 2.
Figure 2: Thirteen atomic-resolution structures for peptide segments of fibril-forming proteins. See text for details of nomenclature. A two-sheet motif of each structure is depicted in projection down the needle crystal axis, showing only the top members of 10^5 stacked segments in each crystalline sheet. A dry, steric-zipper interaction is evidenced by the interdigitation of side chains between sheets. Carbon atoms are shown as purple or white, nitrogen as blue, and oxygen as red. Water molecules are shown as yellow spheres. NNQQNY also contains zinc acetate. Zippers are grouped by class (1, 2, 4, 7, 8); see text for details. Previously reported Sup35 zippers^22 belong to class 1. The three pairs of structures related by blue double-headed arrows are polymorphic pairs (forms 1 and 2; see text for details). The red arrows point to the 90° bend in the upper sheet of MVGGVV form 2.
Figure 4.
Figure 4: The eight classes of steric zippers. Two identical sheets can be classified by: the orientation of their faces (either 'face-to-face' or 'face-to-back'), the orientation of their strands (with both sheets having the same edge of the strand 'up', or one 'up' and the other 'down'), and whether the strands within the sheets are parallel or antiparallel. Both side views (left) and top views (right) show which of the six residues of the segment point into the zipper and which point outward. Green arrows show two-fold screw axes, and yellow arrows show translational symmetry. Below each class are listed protein segments that belong to that class.
  The above figures are reprinted by permission from Macmillan Publishers Ltd: Nature (2007, 447, 453-457) copyright 2007.  
  Figures were selected by an automated process.  

Literature references that cite this PDB file's key reference

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PDB codes: 3low 3loz
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PDB code: 3ppd
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Minimalist design of water-soluble cross-beta architecture.
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PDB codes: 3cka 3eex
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PDB codes: 3nhc 3nhd
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  Proc Natl Acad Sci U S A, 107, 19808-19813.
PDB code: 3o79
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