+検索条件
-Structure paper
タイトル | Structural basis of plp2-mediated cytoskeletal protein folding by TRiC/CCT. |
---|---|
ジャーナル・号・ページ | Sci Adv, Vol. 9, Issue 11, Page eade1207, Year 2023 |
掲載日 | 2023年3月17日 |
著者 | Wenyu Han / Mingliang Jin / Caixuan Liu / Qiaoyu Zhao / Shutian Wang / Yifan Wang / Yue Yin / Chao Peng / Yanxing Wang / Yao Cong / |
PubMed 要旨 | The cytoskeletal proteins tubulin and actin are the obligate substrates of TCP-1 ring complex/Chaperonin containing TCP-1 (TRiC/CCT), and their folding involves co-chaperone. Through cryo-electron ...The cytoskeletal proteins tubulin and actin are the obligate substrates of TCP-1 ring complex/Chaperonin containing TCP-1 (TRiC/CCT), and their folding involves co-chaperone. Through cryo-electron microscopy analysis, we present a more complete picture of TRiC-assisted tubulin/actin folding along TRiC adenosine triphosphatase cycle, under the coordination of co-chaperone plp2. In the open S1/S2 states, plp2 and tubulin/actin engaged within opposite TRiC chambers. Notably, we captured an unprecedented TRiC-plp2-tubulin complex in the closed S3 state, engaged with a folded full-length -tubulin and loaded with a guanosine triphosphate, and a plp2 occupying opposite rings. Another closed S4 state revealed an actin in the intermediate folding state and a plp2. Accompanying TRiC ring closure, plp2 translocation could coordinate substrate translocation on the CCT6 hemisphere, facilitating substrate stabilization and folding. Our findings reveal the folding mechanism of the major cytoskeletal proteins tubulin/actin under the coordination of the biogenesis machinery TRiC and plp2 and extend our understanding of the links between cytoskeletal proteostasis and related human diseases. |
リンク | Sci Adv / PubMed:36921056 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 3.05 - 4.55 Å |
構造データ | EMDB-33917, PDB-7ylu: EMDB-33918, PDB-7ylv: EMDB-33919, PDB-7ylw: EMDB-33920, PDB-7ylx: EMDB-33921, PDB-7yly: |
化合物 | ChemComp-ADP: ChemComp-MG: ChemComp-AF3: ChemComp-GTP: ChemComp-HOH: |
由来 |
|
キーワード | CHAPERONE / TRiC/CCT / phosducin-like protein / tubulin / actin |