3BSD

Light harvesting protein from RC of Chlorobium tepidum

3BSD の概要

• エントリーDOI: 10.2210/pdb3bsd/pdb
• 分子名称: Bacteriochlorophyll a protein, MAGNESIUM ION, BACTERIOCHLOROPHYLL A, ... (4 entities in total)
• 機能のキーワード: green bacteria, photosynthesis, light harvesting, bacteriochlorophyll, chlorophyll, chromophore, electron transport, magnesium, metal-binding, reaction center, transport
• 由来する生物種: Chlorobaculum tepidum
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 47659.77

構造登録者

Nelson, N.,Frolow, F.,Brn-Shem, A. (登録日: 2007-12-23, 公開日: 2008-01-22, 最終更新日: 2023-11-01)

主引用文献

Ben-Shem, A.,Frolow, F.,Nelson, N.
Evolution of photosystem I - from symmetry through pseudo-symmetry to asymmetry.
Febs Lett., 564:274-280, 2004

PubMed Abstract: The evolution of photosystem (PS) I was probably initiated by the formation of a homodimeric reaction center similar to the one currently present in green bacteria. Gene duplication has generated a heterodimeric reaction center that subsequently evolved to the PSI present in cyanobacteria, algae and plant chloroplasts. During the evolution of PSI several attempts to maximize the efficiency of light harvesting took place in the various organisms. In the Chlorobiaceae, chlorosomes and FMO were added to the homodimeric reaction center. In cyanobacteria phycobilisomes and CP43' evolved to cope with the light limitations and stress conditions. The plant PSI utilizes a modular arrangement of membrane light-harvesting proteins (LHCI). We obtained structural information from the two ends of the evolutionary spectrum. Novel features in the structure of Chlorobium tepidum FMO are reported in this communication. Our structure of plant PSI reveals that the addition of subunit G provided the template for LHCI binding, and the addition of subunit H prevented the possibility of trimer formation and provided a binding site for LHCII and the onset of energy spillover from PSII to PSI.

PubMed: 15111109
DOI: 10.1016/S0014-5793(04)00360-6

実験手法

X-RAY DIFFRACTION (2.3 Å)