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-Structure paper
タイトル | Solution structure of the Atg1 complex: implications for the architecture of the phagophore assembly site. |
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ジャーナル・号・ページ | Structure, Vol. 23, Issue 5, Page 809-818, Year 2015 |
掲載日 | 2015年5月5日 |
著者 | Jürgen Köfinger / Michael J Ragusa / Il-Hyung Lee / Gerhard Hummer / James H Hurley / |
PubMed 要旨 | The biogenesis of autophagosomes commences at the phagophore assembly site (PAS), a protein-vesicle ultrastructure that is organized by the Atg1 complex. The Atg1 complex consists of the Atg1 ...The biogenesis of autophagosomes commences at the phagophore assembly site (PAS), a protein-vesicle ultrastructure that is organized by the Atg1 complex. The Atg1 complex consists of the Atg1 protein kinase, the intrinsically disordered region-rich Atg13, and the dimeric double crescent-shaped Atg17-Atg31-Atg29 subcomplex. We show that the PAS contains a relatively uniform ∼28 copies of Atg17, and upon autophagy induction, similar numbers of Atg1 and Atg13 molecules. We then apply ensemble refinement of small-angle X-ray scattering to determine the solution structures of the Atg1-Atg13 and Atg17-Atg31-Atg29 subcomplexes and the Atg1 complex, using a trimmed minipentamer tractable to biophysical studies. We observe tetramers of Atg1 pentamers that assemble via Atg17-Atg31-Atg29. This leads to a model for the higher organization of the Atg1 complex in PAS scaffolding. |
リンク | Structure / PubMed:25817386 / PubMed Central |
手法 | SAS (X-ray synchrotron) |
構造データ | SASDC73: Atg1-Atg13-Atg17-Atg31-Atg29 Minipentamer Complex (Serine/threonine-protein kinase ATG1, Atg1 + Autophagy-related protein 13, Atg13 + Autophagy-related protein 17, Atg17 + Autophagy-related protein 29 + KLLA0A10637p, Atg31) SASDCL3: Atg1-Atg13 Subcomplex (Serine/threonine-protein kinase ATG1, Atg1 + Autophagy-related protein 13, Atg13) SASDCM3: Atg17-Atg31-Atg29 Subcomplex (Autophagy-related protein 17, Atg17 + Autophagy-related protein 29 + KLLA0A10637p, Atg31) |
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