4KT0

Crystal structure of a virus like photosystem I from the cyanobacterium Synechocystis PCC 6803

4KT0 の概要

• エントリーDOI: 10.2210/pdb4kt0/pdb
• 関連するPDBエントリー: 1JB0 3LW5 4L6V
• 分子名称: Photosystem I P700 chlorophyll a apoprotein A1, PHYLLOQUINONE, IRON/SULFUR CLUSTER, ... (19 entities in total)
• 機能のキーワード: photosynthetic reaction center, membrane complex, plastocyanin, cytochrome c6, ferredoxin, electron transport
• 由来する生物種: Synechocystis sp. PCC 6803; 詳細
• タンパク質・核酸の鎖数: 9
• 化学式量合計: 334997.72

構造登録者

Mazor, Y.,Nataf, D.,Toporik, H.,Nelson, N. (登録日: 2013-05-19, 公開日: 2014-02-05, 最終更新日: 2024-11-06)

主引用文献

Mazor, Y.,Nataf, D.,Toporik, H.,Nelson, N.
Crystal structures of virus-like photosystem I complexes from the mesophilic cyanobacterium Synechocystis PCC 6803.
Elife, 3:e01496-e01496, 2014

PubMed Abstract: Oxygenic photosynthesis supports virtually all life forms on earth. Light energy is converted by two photosystems-photosystem I (PSI) and photosystem II (PSII). Globally, nearly 50% of photosynthesis takes place in the Ocean, where single cell cyanobacteria and algae reside together with their viruses. An operon encoding PSI was identified in cyanobacterial marine viruses. We generated a PSI that mimics the salient features of the viral complex, named PSI(PsaJF). PSI(PsaJF) is promiscuous for its electron donors and can accept electrons from respiratory cytochromes. We solved the structure of PSI(PsaJF) and a monomeric PSI, with subunit composition similar to the viral PSI, providing for the first time a detailed description of the reaction center and antenna system from mesophilic cyanobacteria, including red chlorophylls and cofactors of the electron transport chain. Our finding extends the understanding of PSI structure, function and evolution and suggests a unique function for the viral PSI. DOI: http://dx.doi.org/10.7554/eLife.01496.001.

PubMed: 24473073
DOI: 10.7554/eLife.01496

実験手法

X-RAY DIFFRACTION (2.8 Å)