ジャーナル: Nature / 年: 2023 タイトル: Phototrophy by antenna-containing rhodopsin pumps in aquatic environments. 著者: Ariel Chazan / Ishita Das / Takayoshi Fujiwara / Shunya Murakoshi / Andrey Rozenberg / Ana Molina-Márquez / Fumiya K Sano / Tatsuki Tanaka / Patricia Gómez-Villegas / Shirley Larom / Alina ...著者: Ariel Chazan / Ishita Das / Takayoshi Fujiwara / Shunya Murakoshi / Andrey Rozenberg / Ana Molina-Márquez / Fumiya K Sano / Tatsuki Tanaka / Patricia Gómez-Villegas / Shirley Larom / Alina Pushkarev / Partha Malakar / Masumi Hasegawa / Yuya Tsukamoto / Tomohiro Ishizuka / Masae Konno / Takashi Nagata / Yosuke Mizuno / Kota Katayama / Rei Abe-Yoshizumi / Sanford Ruhman / Keiichi Inoue / Hideki Kandori / Rosa León / Wataru Shihoya / Susumu Yoshizawa / Mordechai Sheves / Osamu Nureki / Oded Béjà / 要旨: Energy transfer from light-harvesting ketocarotenoids to the light-driven proton pump xanthorhodopsins has been previously demonstrated in two unique cases: an extreme halophilic bacterium and a ...Energy transfer from light-harvesting ketocarotenoids to the light-driven proton pump xanthorhodopsins has been previously demonstrated in two unique cases: an extreme halophilic bacterium and a terrestrial cyanobacterium. Attempts to find carotenoids that bind and transfer energy to abundant rhodopsin proton pumps from marine photoheterotrophs have thus far failed. Here we detected light energy transfer from the widespread hydroxylated carotenoids zeaxanthin and lutein to the retinal moiety of xanthorhodopsins and proteorhodopsins using functional metagenomics combined with chromophore extraction from the environment. The light-harvesting carotenoids transfer up to 42% of the harvested energy in the violet- or blue-light range to the green-light absorbing retinal chromophore. Our data suggest that these antennas may have a substantial effect on rhodopsin phototrophy in the world's lakes, seas and oceans. However, the functional implications of our findings are yet to be discovered.
電子線照射量: 50.14 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k)
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解析
ソフトウェア
名称: REFMAC / バージョン: 5.8.0267 / 分類: 精密化
EMソフトウェア
ID
名称
バージョン
カテゴリ
4
RELION
3.1
CTF補正
10
cryoSPARC
2
初期オイラー角割当
11
cryoSPARC
2
最終オイラー角割当
CTF補正
タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION
3次元再構成
解像度: 2.3 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 4337540 / 対称性のタイプ: POINT
精密化
解像度: 2→107.9 Å / Cor.coef. Fo:Fc: 0.899 / SU B: 3.934 / SU ML: 0.087 / ESU R: 0.05 立体化学のターゲット値: MAXIMUM LIKELIHOOD WITH PHASES 詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS