5V8K

Homodimeric reaction center of H. modesticaldum

5V8K の概要

• エントリーDOI: 10.2210/pdb5v8k/pdb
• 関連するPDBエントリー: 1JB0
• 分子名称: p800 reaction center core protein, 4,4'-Diaponeurosporene, proteinsubunit pshX, ... (11 entities in total)
• 機能のキーワード: photosynthesis, reaction center, homodimeric
• 由来する生物種: Heliobacterium modesticaldum; 詳細
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 97897.33

構造登録者

Gisriel, C.,Sarrou, I.,Ferlez, B.,Golbeck, J.,Redding, K.E.,Fromme, R. (登録日: 2017-03-22, 公開日: 2017-09-06, 最終更新日: 2024-03-06)

主引用文献

Gisriel, C.,Sarrou, I.,Ferlez, B.,Golbeck, J.H.,Redding, K.E.,Fromme, R.
Structure of a symmetric photosynthetic reaction center-photosystem.
Science, 357:1021-1025, 2017

PubMed Abstract: Reaction centers are pigment-protein complexes that drive photosynthesis by converting light into chemical energy. It is believed that they arose once from a homodimeric protein. The symmetry of a homodimer is broken in heterodimeric reaction-center structures, such as those reported previously. The 2.2-angstrom resolution x-ray structure of the homodimeric reaction center-photosystem from the phototroph exhibits perfect symmetry. The core polypeptide dimer and two small subunits coordinate 54 bacteriochlorophylls and 2 carotenoids that capture and transfer energy to the electron transfer chain at the center, which performs charge separation and consists of 6 (bacterio)chlorophylls and an iron-sulfur cluster; unlike other reaction centers, it lacks a bound quinone. This structure preserves characteristics of the ancestral reaction center, providing insight into the evolution of photosynthesis.

PubMed: 28751471
DOI: 10.1126/science.aan5611

実験手法

X-RAY DIFFRACTION (2.2 Å)