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-Structure paper
タイトル | Subnanometer resolution cryo-EM structure of ATG9. |
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ジャーナル・号・ページ | Autophagy, Vol. 16, Issue 3, Page 575-583, Year 2020 |
掲載日 | 2019年7月16日 |
著者 | Louis Tung Faat Lai / Chuanyang Yu / Jan Siu Kei Wong / Ho Sing Lo / Samir Benlekbir / Liwen Jiang / Wilson Chun Yu Lau / |
PubMed 要旨 | Macroautophagy/autophagy is an essential process for the maintenance of cellular homeostasis by recycling macromolecules under normal and stress conditions. ATG9 (autophagy related 9) is the only ...Macroautophagy/autophagy is an essential process for the maintenance of cellular homeostasis by recycling macromolecules under normal and stress conditions. ATG9 (autophagy related 9) is the only integral membrane protein in the autophagy core machinery and has a central role in mediating autophagosome formation. In cells, ATG9 exists on mobile vesicles that traffic to the growing phagophore, providing an essential membrane source for the formation of autophagosomes. Here we report the three-dimensional structure of ATG9 from at 7.8 Å resolution, determined by single particle cryo-electron microscopy. ATG9 organizes into a homotrimer, with each protomer contributing at least six transmembrane α-helices. At the center of the trimer, the protomers interact their membrane-embedded and C-terminal cytoplasmic regions. Combined with prediction of protein contacts using sequence co-evolutionary information, the structure provides molecular insights into the ATG9 architecture and testable hypotheses for the molecular mechanism of autophagy progression regulated by ATG9. 2D: 2-dimensional; 3D: 3-dimensional; AtATG9: ATG9; Atg: autophagy-related; ATG9: autophagy-related protein 9; cryo-EM: cryo-electron microscopy; DDM: dodecyl maltoside; GraDeR: gradient-based detergent removal; LMNG: lauryl maltose-neopentyl glycol; PAS: phagophore assembly site; PtdIns3K: phosphatidylinositol 3-kinase. |
リンク | Autophagy / PubMed:31276439 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 9.0 Å |
構造データ | EMDB-9681: |
由来 |
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