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-Structure paper
タイトル | Towards the molecular architecture of the peroxisomal receptor docking complex. |
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ジャーナル・号・ページ | Proc Natl Acad Sci U S A, Vol. 117, Issue 52, Page 33216-33224, Year 2020 |
掲載日 | 2020年12月29日 |
![]() | Pascal Lill / Tobias Hansen / Daniel Wendscheck / Bjoern Udo Klink / Tomasz Jeziorek / Dimitrios Vismpas / Jonas Miehling / Julian Bender / Andreas Schummer / Friedel Drepper / Wolfgang Girzalsky / Bettina Warscheid / Ralf Erdmann / Christos Gatsogiannis / ![]() |
PubMed 要旨 | Import of yeast peroxisomal matrix proteins is initiated by cytosolic receptors, which specifically recognize and bind the respective cargo proteins. At the peroxisomal membrane, the cargo-loaded ...Import of yeast peroxisomal matrix proteins is initiated by cytosolic receptors, which specifically recognize and bind the respective cargo proteins. At the peroxisomal membrane, the cargo-loaded receptor interacts with the docking protein Pex14p that is tightly associated with Pex17p. Previous data suggest that this interaction triggers the formation of an import pore for further translocation of the cargo. The mechanistic principles, however, are unclear, mainly because structures of higher-order assemblies are still lacking. Here, using an integrative approach, we provide the structural characterization of the major components of the peroxisomal docking complex Pex14p/Pex17p, in a native bilayer environment, and reveal its subunit organization. Our data show that three copies of Pex14p and a single copy of Pex17p assemble to form a 20-nm rod-like particle. The different subunits are arranged in a parallel manner, showing interactions along their complete sequences and providing receptor binding sites on both membrane sides. The long rod facing the cytosol is mainly formed by the predicted coiled-coil domains of Pex14p and Pex17p, possibly providing the necessary structural support for the formation of the import pore. Further implications of Pex14p/Pex17p for formation of the peroxisomal translocon are discussed. |
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手法 | EM (単粒子) |
解像度 | 10.2 Å |
構造データ | ![]() EMDB-12047: |
由来 |
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