7EWK

Barley photosystem I-LHCI-Lhca6 supercomplex

7EWK の概要

• エントリーDOI: 10.2210/pdb7ewk/pdb
• EMDBエントリー: 31350
• 分子名称: Photosystem I P700 chlorophyll a apoprotein A1, Photosystem I reaction center subunit K, Photosystem I reaction center subunit L, ... (26 entities in total)
• 機能のキーワード: photosystem i, light-harvesting complex, lhca6, cyclic electron transport, photosynthesis
• 由来する生物種: Hordeum vulgare subsp. spontaneum; 詳細
• タンパク質・核酸の鎖数: 15
• 化学式量合計: 505185.86

構造登録者

Wang, W.D.,Shen, L.,Tang, K.,Han, G.Y.,Zhang, X.,Shen, J.R. (登録日: 2021-05-25, 公開日: 2022-01-12, 最終更新日: 2024-06-05)

主引用文献

Shen, L.,Tang, K.,Wang, W.,Wang, C.,Wu, H.,Mao, Z.,An, S.,Chang, S.,Kuang, T.,Shen, J.R.,Han, G.,Zhang, X.
Architecture of the chloroplast PSI-NDH supercomplex in Hordeum vulgare.
Nature, 601:649-654, 2022

PubMed Abstract: The chloroplast NADH dehydrogenase-like (NDH) complex is composed of at least 29 subunits and has an important role in mediating photosystem I (PSI) cyclic electron transport (CET). The NDH complex associates with PSI to form the PSI-NDH supercomplex and fulfil its function. Here, we report cryo-electron microscopy structures of a PSI-NDH supercomplex from barley (Hordeum vulgare). The structures reveal that PSI-NDH is composed of two copies of the PSI-light-harvesting complex I (LHCI) subcomplex and one NDH complex. Two monomeric LHCI proteins, Lhca5 and Lhca6, mediate the binding of two PSI complexes to NDH. Ten plant chloroplast-specific NDH subunits are presented and their exact positions as well as their interactions with other subunits in NDH are elucidated. In all, this study provides a structural basis for further investigations on the functions and regulation of PSI-NDH-dependent CET.

PubMed: 34879391
DOI: 10.1038/s41586-021-04277-6

実験手法

ELECTRON MICROSCOPY (3.88 Å)