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-Structure paper
タイトル | Architecture of the AP2/clathrin coat on the membranes of clathrin-coated vesicles. |
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ジャーナル・号・ページ | Sci Adv, Vol. 6, Issue 30, Page eaba8381, Year 2020 |
掲載日 | 2020年7月22日 |
著者 | Oleksiy Kovtun / Veronica Kane Dickson / Bernard T Kelly / David J Owen / John A G Briggs / |
PubMed 要旨 | Clathrin-mediated endocytosis (CME) is crucial for modulating the protein composition of a cell's plasma membrane. Clathrin forms a cage-like, polyhedral outer scaffold around a vesicle, to which ...Clathrin-mediated endocytosis (CME) is crucial for modulating the protein composition of a cell's plasma membrane. Clathrin forms a cage-like, polyhedral outer scaffold around a vesicle, to which cargo-selecting clathrin adaptors are attached. Adaptor protein complex (AP2) is the key adaptor in CME. Crystallography has shown AP2 to adopt a range of conformations. Here, we used cryo-electron microscopy, tomography, and subtomogram averaging to determine structures, interactions, and arrangements of clathrin and AP2 at the key steps of coat assembly, from AP2 in solution to membrane-assembled clathrin-coated vesicles (CCVs). AP2 binds cargo and PtdIns(4,5) (phosphatidylinositol 4,5-bisphosphate)-containing membranes via multiple interfaces, undergoing conformational rearrangement from its cytosolic state. The binding mode of AP2 β2 appendage into the clathrin lattice in CCVs and buds implies how the adaptor structurally modulates coat curvature and coat disassembly. |
リンク | Sci Adv / PubMed:32743075 / PubMed Central |
手法 | EM (単粒子) / EM (サブトモグラム平均) |
解像度 | 3.9 - 11.9 Å |
構造データ | EMDB-10747, PDB-6yae: EMDB-10748, PDB-6yaf: EMDB-10749: EMDB-10750: EMDB-10751, PDB-6yah: EMDB-10752: EMDB-10753: EMDB-10754, PDB-6yai: |
由来 |
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キーワード | ENDOCYTOSIS / clathrin / clathrin adaptor / ap2 / clathrin assembly |