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-Structure paper
タイトル | Structural insights into cyanobacterial photosystem II intermediates associated with Psb28 and Tsl0063. |
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ジャーナル・号・ページ | Nat Plants, Vol. 7, Issue 8, Page 1132-1142, Year 2021 |
掲載日 | 2021年7月5日 |
著者 | Yanan Xiao / Guoqiang Huang / Xin You / Qingjun Zhu / Wenda Wang / Tingyun Kuang / Guangye Han / Sen-Fang Sui / Jian-Ren Shen / |
PubMed 要旨 | Photosystem II (PSII) is a multisubunit pigment-protein complex and catalyses light-induced water oxidation, leading to the conversion of light energy into chemical energy and the release of dioxygen. ...Photosystem II (PSII) is a multisubunit pigment-protein complex and catalyses light-induced water oxidation, leading to the conversion of light energy into chemical energy and the release of dioxygen. We analysed the structures of two Psb28-bound PSII intermediates, Psb28-RC47 and Psb28-PSII, purified from a psbV-deletion strain of the thermophilic cyanobacterium Thermosynechococcus vulcanus, using cryo-electron microscopy. Both Psb28-RC47 and Psb28-PSII bind one Psb28, one Tsl0063 and an unknown subunit. Psb28 is located at the cytoplasmic surface of PSII and interacts with D1, D2 and CP47, whereas Tsl0063 is a transmembrane subunit and binds at the side of CP47/PsbH. Substantial structural perturbations are observed at the acceptor side, which result in conformational changes of the quinone (Q) and non-haem iron binding sites and thus may protect PSII from photodamage during assembly. These results provide a solid structural basis for understanding the assembly process of native PSII. |
リンク | Nat Plants / PubMed:34226692 |
手法 | EM (単粒子) |
解像度 | 3.14 Å |
構造データ | EMDB-30902, PDB-7dxa: EMDB-30909, PDB-7dxh: |
化合物 | ChemComp-SQD: ChemComp-CLA: ChemComp-PHO: ChemComp-BCR: ChemComp-CL: ChemComp-MGE:
ChemComp-UNL: ChemComp-LMT: ChemComp-FE2: ChemComp-PQ9: ChemComp-HTG: ChemComp-DGD: ChemComp-HEM: |
由来 |
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キーワード | PLANT PROTEIN / Photosystem II; Cryo-EM; assembly; repair; Psb28; Tsl0063 |