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TitleAmyloid fibril structure from the vascular variant of systemic AA amyloidosis.
Journal, issue, pagesNat Commun, Vol. 13, Issue 1, Page 7261, Year 2022
Publish dateNov 25, 2022
AuthorsSambhasan Banerjee / Julian Baur / Christoph Daniel / Peter Benedikt Pfeiffer / Manuel Hitzenberger / Lukas Kuhn / Sebastian Wiese / Johan Bijzet / Christian Haupt / Kerstin U Amann / Martin Zacharias / Bouke P C Hazenberg / Gunilla T Westermark / Matthias Schmidt / Marcus Fändrich /
PubMed AbstractSystemic AA amyloidosis is a debilitating protein misfolding disease in humans and animals. In humans, it occurs in two variants that are called 'vascular' and 'glomerular', depending on the main ...Systemic AA amyloidosis is a debilitating protein misfolding disease in humans and animals. In humans, it occurs in two variants that are called 'vascular' and 'glomerular', depending on the main amyloid deposition site in the kidneys. Using cryo electron microscopy, we here show the amyloid fibril structure underlying the vascular disease variant. Fibrils purified from the tissue of such patients are mainly left-hand twisted and contain two non-equal stacks of fibril proteins. They contrast in these properties to the fibrils from the glomerular disease variant which are right-hand twisted and consist of two structurally equal stacks of fibril proteins. Our data demonstrate that the different disease variants in systemic AA amyloidosis are associated with different fibril morphologies.
External linksNat Commun / PubMed:36433936 / PubMed Central
MethodsEM (helical sym.)
Resolution2.56 Å
Structure data

14771

7zky

EMDB-14771, PDB-7zky:
Amyloid fibril from human systemic AA amyloidosis (vascular variant)
Method: EM (helical sym.) / Resolution: 2.56 Å

Source
  • homo sapiens (human)
KeywordsPROTEIN FIBRIL / Amyloids / Vascular AA / SAA / Cryo-EM

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