3WMM

Crystal structure of the LH1-RC complex from Thermochromatium tepidum in C2 form

3WMM の概要

• エントリーDOI: 10.2210/pdb3wmm/pdb
• 関連するPDBエントリー: 3WMN 3WMO
• 分子名称: Photosynthetic reaction center C subunit, BACTERIOPHEOPHYTIN A, Ubiquinone-8, ... (18 entities in total)
• 機能のキーワード: photosynthesis
• 由来する生物種: Thermochromatium tepidum; 詳細
• 細胞内の位置: Cellular chromatophore membrane ; Lipid-anchor : D2Z0P5
• タンパク質・核酸の鎖数: 36
• 化学式量合計: 392577.13

構造登録者

Niwa, S.,Takeda, K.,Wang-Otomo, Z.-Y.,Miki, K. (登録日: 2013-11-22, 公開日: 2014-04-09, 最終更新日: 2024-03-20)

主引用文献

Niwa, S.,Yu, L.J.,Takeda, K.,Hirano, Y.,Kawakami, T.,Wang-Otomo, Z.Y.,Miki, K.
Structure of the LH1-RC complex from Thermochromatium tepidum at 3.0 angstrom
Nature, 508:228-232, 2014

PubMed Abstract: The light-harvesting core antenna (LH1) and the reaction centre (RC) of purple photosynthetic bacteria form a supramolecular complex (LH1-RC) to use sunlight energy in a highly efficient manner. Here we report the first near-atomic structure, to our knowledge, of a LH1-RC complex, namely that of a Ca(2+)-bound complex from Thermochromatium tepidum, which reveals detailed information on the arrangement and interactions of the protein subunits and the cofactors. The RC is surrounded by 16 heterodimers of the LH1 αβ-subunit that form a completely closed structure. The Ca(2+) ions are located at the periplasmic side of LH1. Thirty-two bacteriochlorophyll and 16 spirilloxanthin molecules in the LH1 ring form an elliptical assembly. The geometries of the pigment assembly involved in the absorption characteristics of the bacteriochlorophyll in LH1 and excitation energy transfer among the pigments are reported. In addition, possible ubiquinone channels in the closed LH1 complex are proposed based on the atomic structure.

PubMed: 24670637
DOI: 10.1038/nature13197

実験手法

X-RAY DIFFRACTION (3.008 Å)