+検索条件
-Structure paper
| タイトル | Structure of a tetrameric photosystem I from a glaucophyte alga Cyanophora paradoxa. |
|---|---|
| ジャーナル・号・ページ | Nat Commun, Vol. 13, Issue 1, Page 1679, Year 2022 |
| 掲載日 | 2022年3月30日 |
著者 | Koji Kato / Ryo Nagao / Yoshifumi Ueno / Makio Yokono / Takehiro Suzuki / Tian-Yi Jiang / Naoshi Dohmae / Fusamichi Akita / Seiji Akimoto / Naoyuki Miyazaki / Jian-Ren Shen / ![]() |
| PubMed 要旨 | Photosystem I (PSI) is one of the two photosystems functioning in light-energy harvesting, transfer, and electron transfer in photosynthesis. However, the oligomerization state of PSI is variable ...Photosystem I (PSI) is one of the two photosystems functioning in light-energy harvesting, transfer, and electron transfer in photosynthesis. However, the oligomerization state of PSI is variable among photosynthetic organisms. We present a 3.8-Å resolution cryo-electron microscopic structure of tetrameric PSI isolated from the glaucophyte alga Cyanophora paradoxa, which reveals differences with PSI from other organisms in subunit composition and organization. The PSI tetramer is organized in a dimer of dimers with a C2 symmetry. Unlike cyanobacterial PSI tetramers, two of the four monomers are rotated around 90°, resulting in a completely different pattern of monomer-monomer interactions. Excitation-energy transfer among chlorophylls differs significantly between Cyanophora and cyanobacterial PSI tetramers. These structural and spectroscopic features reveal characteristic interactions and excitation-energy transfer in the Cyanophora PSI tetramer, suggesting that the Cyanophora PSI could represent a turning point in the evolution of PSI from prokaryotes to eukaryotes. |
リンク | Nat Commun / PubMed:35354806 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 3.2 - 4.0 Å |
| 構造データ | EMDB-30820, PDB-7dr0: EMDB-30821, PDB-7dr1: ![]() EMDB-30822: EMDB-30823, PDB-7dr2: |
| 化合物 | ![]() ChemComp-CL0: ![]() ChemComp-CLA: ![]() ChemComp-PQN: ![]() ChemComp-SF4: ![]() ChemComp-BCR: ![]() ChemComp-LHG: ![]() ChemComp-LMG: |
| 由来 |
|
キーワード | PHOTOSYNTHESIS / Photosystem I / ELECTRON TRANSPORT |
ムービー
コントローラー
構造ビューア
万見文献について



著者
リンク













cyanophora paradoxa (真核生物)
キーワード