3 years ago

Common Fibril Structures Imply Systemically Conserved Protein Misfolding Pathways In Vivo

Common Fibril Structures Imply Systemically Conserved Protein Misfolding Pathways In Vivo
Ute Hegenbart, Falk Liberta, William Close, Hauke Lilie, Christian Haupt, Andreas Schmidt, Stefan Schönland, Matthias Schmidt, Marcus Fändrich, Karl-Heinz Gührs, Marie-Theres Vielberg, Rolf Koehler, Angelika Schierhorn, Karthikeyan Annamalai, Michael Groll
Systemic amyloidosis is caused by the misfolding of a circulating amyloid precursor protein and the deposition of amyloid fibrils in multiple organs. Chemical and biophysical analysis of amyloid fibrils from human AL and murine AA amyloidosis reveal the same fibril morphologies in different tissues or organs of one patient or diseased animal. The observed structural similarities concerned the fibril morphology, the fibril protein primary and secondary structures, the presence of post-translational modifications and, in case of the AL fibrils, the partially folded characteristics of the polypeptide chain within the fibril. Our data imply for both analyzed forms of amyloidosis that the pathways of protein misfolding are systemically conserved; that is, they follow the same rules irrespective of where inside one body fibrils are formed or accumulated. Never break the chain: Polypeptide chains form the same amyloid fibril structures in different tissues of the same body, indicating that the pathways of protein misfolding are conserved in vivo.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/anie.201701761

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