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| Title | Insights into the Structural Basis of Amyloid Resistance Provided by Cryo-EM Structures of AApoAII Amyloid Fibrils. |
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| Journal, issue, pages | J Mol Biol, Vol. 436, Issue 4, Page 168441, Year 2024 |
| Publish date | Feb 15, 2024 |
 Authors | Giada Andreotti / Julian Baur / Marijana Ugrina / Peter Benedikt Pfeiffer / Max Hartmann / Sebastian Wiese / Hiroki Miyahara / Keiichi Higuchi / Nadine Schwierz / Matthias Schmidt / Marcus Fändrich /   |
| PubMed Abstract | Amyloid resistance is the inability or the reduced susceptibility of an organism to develop amyloidosis. In this study we have analysed the molecular basis of the resistance to systemic AApoAII ...Amyloid resistance is the inability or the reduced susceptibility of an organism to develop amyloidosis. In this study we have analysed the molecular basis of the resistance to systemic AApoAII amyloidosis, which arises from the formation of amyloid fibrils from apolipoprotein A-II (ApoA-II). The disease affects humans and animals, including SAMR1C mice that express the C allele of ApoA-II protein, whereas other mouse strains are resistant to development of amyloidosis due to the expression of other ApoA-II alleles, such as ApoA-IIF. Using cryo-electron microscopy, molecular dynamics simulations and other methods, we have determined the structures of pathogenic AApoAII amyloid fibrils from SAMR1C mice and analysed the structural effects of ApoA-IIF-specific mutational changes. Our data show that these changes render ApoA-IIF incompatible with the specific fibril morphologies, with which ApoA-II protein can become pathogenic in vivo. |
 External links | J Mol Biol / PubMed:38199491 |
| Methods | EM (helical sym.) |
| Resolution | 2.4 - 2.6 Å |
| Structure data | EMDB-17104, PDB-8oq4: EMDB-17105, PDB-8oq5: |
| Source |
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 Keywords | PROTEIN FIBRIL /  amyloid / systemic amyloidosis / misfolding disease / helical |
