1ILX

Excited State Dynamics in Photosystem II Revised. New Insights from the X-ray Structure.

1ILX の概要

• エントリーDOI: 10.2210/pdb1ilx/pdb
• 関連するPDBエントリー: 1FE1
• 分子名称: PHOTOSYSTEM II: SUBUNIT PSBA, MANGANESE (II) ION, CHLOROPHYLL A, ... (16 entities in total)
• 機能のキーワード: antenna chlorophyll, exitation transfer, photosynthesis
• 由来する生物種: Synechococcus elongatus; 詳細
• タンパク質・核酸の鎖数: 18
• 化学式量合計: 281813.05

構造登録者

Vasilev, S.,Orth, P.,Zouni, A.,Owens, T.G.,Bruce, D. (登録日: 2001-05-09, 公開日: 2001-07-18, 最終更新日: 2024-02-07)

主引用文献

Vasil'ev, S.,Orth, P.,Zouni, A.,Owens, T.G.,Bruce, D.
Excited-state dynamics in photosystem II: insights from the x-ray crystal structure.
Proc.Natl.Acad.Sci.USA, 98:8602-8607, 2001

PubMed Abstract: The heart of oxygenic photosynthesis is photosystem II (PSII), a multisubunit protein complex that uses solar energy to drive the splitting of water and production of molecular oxygen. The effectiveness of the photochemical reaction center of PSII depends on the efficient transfer of excitation energy from the surrounding antenna chlorophylls. A kinetic model for PSII, based on the x-ray crystal structure coordinates of 37 antenna and reaction center pigment molecules, allows us to map the major energy transfer routes from the antenna chlorophylls to the reaction center chromophores. The model shows that energy transfer to the reaction center is slow compared with the rate of primary electron transport and depends on a few bridging chlorophyll molecules. This unexpected energetic isolation of the reaction center in PSII is similar to that found in the bacterial photosystem, conflicts with the established view of the photophysics of PSII, and may be a functional requirement for primary photochemistry in photosynthesis. In addition, the model predicts a value for the intrinsic photochemical rate constant that is 4 times that found in bacterial reaction centers.

PubMed: 11459991
DOI: 10.1073/pnas.141239598

実験手法

X-RAY DIFFRACTION (3.8 Å)