6TCL

Photosystem I tetramer

これはPDB形式変換不可エントリーです。

6TCL の概要

• エントリーDOI: 10.2210/pdb6tcl/pdb
• EMDBエントリー: 10461
• 分子名称: Photosystem I P700 chlorophyll a apoprotein A1, Photosystem I reaction center subunit XI, Photosystem I reaction center subunit XII, ... (28 entities in total)
• 機能のキーワード: photosynthesis, tetramer, anabaena, psi
• 由来する生物種: Nostoc sp. PCC 7120; 詳細
• タンパク質・核酸の鎖数: 48
• 化学式量合計: 1478636.48

構造登録者

Chen, M.,Perez-Boerema, A.,Li, S.,Amunts, A. (登録日: 2019-11-06, 公開日: 2020-02-19, 最終更新日: 2024-05-22)

主引用文献

Chen, M.,Perez-Boerema, A.,Zhang, L.,Li, Y.,Yang, M.,Li, S.,Amunts, A.
Distinct structural modulation of photosystem I and lipid environment stabilizes its tetrameric assembly.
Nat.Plants, 6:314-320, 2020

PubMed Abstract: Photosystem I (PSI) is able to form different oligomeric states across various species. To reveal the structural basis for PSI dimerization and tetramerization, we structurally investigated PSI from the cyanobacterium Anabaena. This revealed a disrupted trimerization domain due to lack of the terminal residues of PsaL in the lumen, which resulted in PSI dimers with loose connections between monomers and weaker energy-coupled chlorophylls than in the trimer. At the dimer surface, specific phospholipids, cofactors and interactions in combination facilitated recruitment of another dimer to form a tetramer. Taken together, the relaxed luminal connections and lipid specificity at the dimer interface account for membrane curvature. PSI tetramer assembly appears to increase the surface area of the thylakoid membrane, which would contribute to PSI crowding.

PubMed: 32170279
DOI: 10.1038/s41477-020-0610-x

実験手法

ELECTRON MICROSCOPY (3.2 Å)