8WMJ

structure of PSI-11CAC complex at Logrithmic growth phase

8WMJ の概要

• エントリーDOI: 10.2210/pdb8wmj/pdb
• EMDBエントリー: 37654
• 分子名称: Photosystem I P700 chlorophyll a apoprotein A1, Photosystem I reaction center subunit XII, Photosystem I reaction center subunit PsaK, ... (37 entities in total)
• 機能のキーワード: photosynthesis, alloxanthin, chlorophyll c, psaq
• 由来する生物種: Rhodomonas salina; 詳細
• タンパク質・核酸の鎖数: 25
• 化学式量合計: 850922.26

構造登録者

Zhang, S.M.,Si, L.,Li, M. (登録日: 2023-10-03, 公開日: 2024-05-29, 最終更新日: 2024-11-13)

主引用文献

Zhang, S.,Si, L.,Su, X.,Zhao, X.,An, X.,Li, M.
Growth phase-dependent reorganization of cryptophyte photosystem I antennae.
Commun Biol, 7:560-560, 2024

PubMed Abstract: Photosynthetic cryptophytes are eukaryotic algae that utilize membrane-embedded chlorophyll a/c binding proteins (CACs) and lumen-localized phycobiliproteins (PBPs) as their light-harvesting antennae. Cryptophytes go through logarithmic and stationary growth phases, and may adjust their light-harvesting capability according to their particular growth state. How cryptophytes change the type/arrangement of the photosynthetic antenna proteins to regulate their light-harvesting remains unknown. Here we solve four structures of cryptophyte photosystem I (PSI) bound with CACs that show the rearrangement of CACs at different growth phases. We identify a cryptophyte-unique protein, PsaQ, which harbors two chlorophyll molecules. PsaQ specifically binds to the lumenal region of PSI during logarithmic growth phase and may assist the association of PBPs with photosystems and energy transfer from PBPs to photosystems.

PubMed: 38734819
DOI: 10.1038/s42003-024-06268-5

実験手法

ELECTRON MICROSCOPY (3 Å)