Antiparallel beta-sheet architecture in Iowa-mutant beta-amyloid fibrils.
Qiang, W., Yau, W.M., Luo, Y., Mattson, M.P., Tycko, R.(2012) Proc Natl Acad Sci U S A 109: 4443-4448
- PubMed: 22403062 
- DOI: 10.1073/pnas.1111305109
- Primary Citation of Related Structures:  
2LNQ - PubMed Abstract: 
Wild-type, full-length (40- and 42-residue) amyloid β-peptide (Aβ) fibrils have been shown by a variety of magnetic resonance techniques to contain cross-β structures in which the β-sheets have an in-register parallel supramolecular organization. In contrast, recent studies of fibrils formed in vitro by the Asp23-to-Asn mutant of 40-residue Aβ (D23N-Aβ(1-40)), which is associated with early onset neurodegeneration, indicate that D23N-Aβ(1-40) fibrils can contain either parallel or antiparallel β-sheets ...