+検索条件
-Structure paper
タイトル | Cryo-EM structures of amyloid-β filaments with the Arctic mutation (E22G) from human and mouse brains. |
---|---|
ジャーナル・号・ページ | Acta Neuropathol, Vol. 145, Issue 3, Page 325-333, Year 2023 |
掲載日 | 2023年1月7日 |
著者 | Yang Yang / Wenjuan Zhang / Alexey G Murzin / Manuel Schweighauser / Melissa Huang / Sofia Lövestam / Sew Y Peak-Chew / Takashi Saito / Takaomi C Saido / Jennifer Macdonald / Isabelle Lavenir / Bernardino Ghetti / Caroline Graff / Amit Kumar / Agneta Nordberg / Michel Goedert / Sjors H W Scheres / |
PubMed 要旨 | The Arctic mutation, encoding E693G in the amyloid precursor protein (APP) gene [E22G in amyloid-β (Aβ)], causes dominantly inherited Alzheimer's disease. Here, we report the high-resolution cryo- ...The Arctic mutation, encoding E693G in the amyloid precursor protein (APP) gene [E22G in amyloid-β (Aβ)], causes dominantly inherited Alzheimer's disease. Here, we report the high-resolution cryo-EM structures of Aβ filaments from the frontal cortex of a previously described case (AβPParc1) with the Arctic mutation. Most filaments consist of two pairs of non-identical protofilaments that comprise residues V12-V40 (human Arctic fold A) and E11-G37 (human Arctic fold B). They have a substructure (residues F20-G37) in common with the folds of type I and type II Aβ42. When compared to the structures of wild-type Aβ42 filaments, there are subtle conformational changes in the human Arctic folds, because of the lack of a side chain at G22, which may strengthen hydrogen bonding between mutant Aβ molecules and promote filament formation. A minority of Aβ42 filaments of type II was also present, as were tau paired helical filaments. In addition, we report the cryo-EM structures of Aβ filaments with the Arctic mutation from mouse knock-in line App. Most filaments are made of two identical mutant protofilaments that extend from D1 to G37 (App murine Arctic fold). In a minority of filaments, two dimeric folds pack against each other in an anti-parallel fashion. The App murine Arctic fold differs from the human Arctic folds, but shares some substructure. |
リンク | Acta Neuropathol / PubMed:36611124 / PubMed Central |
手法 | EM (らせん対称) |
解像度 | 1.99 - 3.5 Å |
構造データ | EMDB-16022, PDB-8bfz: EMDB-16023, PDB-8bg0: EMDB-16027, PDB-8bg9: |
化合物 | ChemComp-HOH: |
由来 |
|
キーワード | PROTEIN FIBRIL / Amyloid / filaments / amyloid-beta / Arctic mutation / APP / E22G / E693G / NL-G-F / mouse brains |