5XNM

Structure of unstacked C2S2M2-type PSII-LHCII supercomplex from Pisum sativum

5XNM の概要

• エントリーDOI: 10.2210/pdb5xnm/pdb
• EMDBエントリー: 6742
• 分子名称: Chlorophyll a-b binding protein 8, chloroplastic, Photosystem II reaction center protein H, Photosystem II reaction center protein I, PsbI, ... (39 entities in total)
• 機能のキーワード: photosystem ii, psii-lhcii, c2s2m2, supercomplex, membrane protein
• 由来する生物種: Pisum sativum (Garden pea); 詳細
• タンパク質・核酸の鎖数: 54
• 化学式量合計: 1436522.06

構造登録者

Su, X.D.,Ma, J.,Wei, X.P.,Cao, P.,Zhu, D.J.,Chang, W.R.,Liu, Z.F.,Zhang, X.Z.,Li, M. (登録日: 2017-05-23, 公開日: 2017-09-20, 最終更新日: 2019-05-01)

主引用文献

Su, X.,Ma, J.,Wei, X.,Cao, P.,Zhu, D.,Chang, W.,Liu, Z.,Zhang, X.,Li, M.
Structure and assembly mechanism of plant C2S2M2-type PSII-LHCII supercomplex
Science, 357:815-820, 2017

PubMed Abstract: In plants, the photosynthetic machinery photosystem II (PSII) consists of a core complex associated with variable numbers of light-harvesting complexes II (LHCIIs). The supercomplex, comprising a dimeric core and two strongly bound and two moderately bound LHCIIs (CSM), is the dominant form in plants acclimated to limited light. Here we report cryo-electron microscopy structures of two forms of CSM (termed stacked and unstacked) from at 2.7- and 3.2-angstrom resolution, respectively. In each CSM, the moderately bound LHCII assembles specifically with a peripheral antenna complex CP24-CP29 heterodimer and the strongly bound LHCII, to establish a pigment network that facilitates light harvesting at the periphery and energy transfer into the core. The high mobility of peripheral antennae, including the moderately bound LHCII and CP24, provides insights into functional regulation of plant PSII.

PubMed: 28839073
DOI: 10.1126/science.aan0327

実験手法

ELECTRON MICROSCOPY (3.2 Å)