- EMDB-31605: Cryo-EM structure of cyanobacterial photosystem I in the presence... -
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基本情報
登録情報
データベース: EMDB / ID: EMD-31605
タイトル
Cryo-EM structure of cyanobacterial photosystem I in the presence of ferredoxin and cytochrome c6
マップデータ
3D refined map in C3 symmetry, which was used for model building and refinement.
試料
複合体: Cryo-EM map of cyanobacterial photosystem I in the presence of ferredoxin and cytochrome c6
複合体: Photosystem I trimer
タンパク質・ペプチド: x 10種
複合体: Ga-Substituted Ferredoxin
タンパク質・ペプチド: x 3種
リガンド: x 11種
キーワード
Photosystem I / Ferredoxin / Cytochrome c6 / PHOTOSYNTHESIS
機能・相同性
機能・相同性情報
photosystem I reaction center / photosystem I / photosynthetic electron transport in photosystem I / photosystem I / chlorophyll binding / plasma membrane-derived thylakoid membrane / photosynthesis / electron transport chain / 2 iron, 2 sulfur cluster binding / 4 iron, 4 sulfur cluster binding ...photosystem I reaction center / photosystem I / photosynthetic electron transport in photosystem I / photosystem I / chlorophyll binding / plasma membrane-derived thylakoid membrane / photosynthesis / electron transport chain / 2 iron, 2 sulfur cluster binding / 4 iron, 4 sulfur cluster binding / electron transfer activity / oxidoreductase activity / magnesium ion binding / metal ion binding / membrane 類似検索 - 分子機能
Photosystem I PsaX / Photosystem I PsaX superfamily / PsaX family / Photosystem I reaction center subunit PsaK / Photosystem I reaction centre subunit PsaK / Ferredoxin [2Fe-2S], plant / Photosystem I PsaM, reaction centre superfamily / Photosystem I PsaM, reaction centre / Photosystem I protein M (PsaM) / Photosystem I reaction centre subunit PsaK superfamily ...Photosystem I PsaX / Photosystem I PsaX superfamily / PsaX family / Photosystem I reaction center subunit PsaK / Photosystem I reaction centre subunit PsaK / Ferredoxin [2Fe-2S], plant / Photosystem I PsaM, reaction centre superfamily / Photosystem I PsaM, reaction centre / Photosystem I protein M (PsaM) / Photosystem I reaction centre subunit PsaK superfamily / Photosystem I psaG and psaK proteins signature. / Photosystem I reaction center subunit V/PsaK / Photosystem I psaG / psaK / Photosystem I PsaL, reaction centre subunit XI / Photosystem I, reaction centre subunit XI / Photosystem I PsaL, reaction centre subunit XI superfamily / Photosystem I reaction centre subunit XI / Photosystem I reaction centre subunit VIII / Photosystem I reaction centre subunit VIII / Photosystem I reaction centre subunit VIII superfamily / Photosystem I PsaF, reaction centre subunit III / Photosystem I PsaF, reaction centre subunit III superfamily / Photosystem I reaction centre subunit III / Photosystem I PsaD / Photosystem I, reaction centre subunit PsaD superfamily / PsaD / Photosystem I PsaE, reaction centre subunit IV / Photosystem I PsaJ, reaction centre subunit IX superfamily / Photosystem I reaction centre subunit IV / PsaE / Photosystem I PsaJ, reaction centre subunit IX / Photosystem I reaction centre subunit IX / PsaJ / Photosystem I protein PsaC / Photosystem I PsaB / Photosystem I PsaA / Photosystem I PsaA/PsaB, conserved site / Photosystem I psaA and psaB proteins signature. / : / Photosystem I PsaA/PsaB / Photosystem I PsaA/PsaB superfamily / Photosystem I psaA/psaB protein / 2Fe-2S ferredoxin, iron-sulphur binding site / 2Fe-2S ferredoxin-type iron-sulfur binding region signature. / Electron transport accessory-like domain superfamily / 2Fe-2S iron-sulfur cluster binding domain / Beta-grasp domain superfamily / 4Fe-4S dicluster domain / 2Fe-2S ferredoxin-type iron-sulfur binding domain profile. / 2Fe-2S ferredoxin-type iron-sulfur binding domain / 2Fe-2S ferredoxin-like superfamily / 4Fe-4S ferredoxin, iron-sulphur binding, conserved site / 4Fe-4S ferredoxin-type iron-sulfur binding region signature. / 4Fe-4S ferredoxin-type iron-sulfur binding domain profile. / 4Fe-4S ferredoxin-type, iron-sulphur binding domain 類似検索 - ドメイン・相同性
Ferredoxin-1 / Photosystem I reaction center subunit III / Photosystem I reaction center subunit XII / Photosystem I P700 chlorophyll a apoprotein A1 / Photosystem I P700 chlorophyll a apoprotein A2 / Photosystem I iron-sulfur center / Photosystem I reaction center subunit II / Photosystem I reaction center subunit IV / Photosystem I reaction center subunit PsaK / Photosystem I reaction center subunit VIII ...Ferredoxin-1 / Photosystem I reaction center subunit III / Photosystem I reaction center subunit XII / Photosystem I P700 chlorophyll a apoprotein A1 / Photosystem I P700 chlorophyll a apoprotein A2 / Photosystem I iron-sulfur center / Photosystem I reaction center subunit II / Photosystem I reaction center subunit IV / Photosystem I reaction center subunit PsaK / Photosystem I reaction center subunit VIII / Photosystem I reaction center subunit IX / Photosystem I reaction center subunit XI / Photosystem I 4.8K protein 類似検索 - 構成要素
ジャーナル: Commun Biol / 年: 2022 タイトル: Structure of cyanobacterial photosystem I complexed with ferredoxin at 1.97 Å resolution. 著者: Jiannan Li / Noriyuki Hamaoka / Fumiaki Makino / Akihiro Kawamoto / Yuxi Lin / Matthias Rögner / Marc M Nowaczyk / Young-Ho Lee / Keiichi Namba / Christoph Gerle / Genji Kurisu / 要旨: Photosystem I (PSI) is a light driven electron pump transferring electrons from Cytochrome c (Cyt c) to Ferredoxin (Fd). An understanding of this electron transfer process is hampered by a paucity of ...Photosystem I (PSI) is a light driven electron pump transferring electrons from Cytochrome c (Cyt c) to Ferredoxin (Fd). An understanding of this electron transfer process is hampered by a paucity of structural detail concerning PSI:Fd interface and the possible binding sites of Cyt c. Here we describe the high resolution cryo-EM structure of Thermosynechococcus elongatus BP-1 PSI in complex with Fd and a loosely bound Cyt c. Side chain interactions at the PSI:Fd interface including bridging water molecules are visualized in detail. The structure explains the properties of mutants of PsaE and PsaC that affect kinetics of Fd binding and suggests a molecular switch for the dissociation of Fd upon reduction. Calorimetry-based thermodynamic analyses confirms a single binding site for Fd and demonstrates that PSI:Fd complexation is purely driven by entropy. A possible reaction cycle for the efficient transfer of electrons from Cyt c to Fd via PSI is proposed.
全体 : Cryo-EM map of cyanobacterial photosystem I in the presence of fe...
全体
名称: Cryo-EM map of cyanobacterial photosystem I in the presence of ferredoxin and cytochrome c6
要素
複合体: Cryo-EM map of cyanobacterial photosystem I in the presence of ferredoxin and cytochrome c6
複合体: Photosystem I trimer
タンパク質・ペプチド: Photosystem I P700 chlorophyll a apoprotein A1
タンパク質・ペプチド: Photosystem I P700 chlorophyll a apoprotein A2
タンパク質・ペプチド: Photosystem I iron-sulfur center
タンパク質・ペプチド: Photosystem I reaction center subunit II
タンパク質・ペプチド: Photosystem I reaction center subunit IV
タンパク質・ペプチド: Photosystem I reaction center subunit VIII
タンパク質・ペプチド: Photosystem I reaction center subunit IX
タンパク質・ペプチド: Photosystem I reaction center subunit PsaK
タンパク質・ペプチド: Photosystem I reaction center subunit XI
タンパク質・ペプチド: Photosystem I reaction center subunit XII
複合体: Ga-Substituted Ferredoxin
タンパク質・ペプチド: Photosystem I reaction center subunit III
タンパク質・ペプチド: Ferredoxin-1
タンパク質・ペプチド: Photosystem I 4.8K protein
リガンド: CHLOROPHYLL A ISOMER
リガンド: CHLOROPHYLL A
リガンド: PHYLLOQUINONE
リガンド: IRON/SULFUR CLUSTER
リガンド: BETA-CAROTENE
リガンド: 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE
リガンド: UNKNOWN LIGAND
リガンド: DIGALACTOSYL DIACYL GLYCEROL (DGDG)
リガンド: CALCIUM ION
リガンド: [2Ga-2S] cluster
リガンド: water
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超分子 #1: Cryo-EM map of cyanobacterial photosystem I in the presence of fe...
超分子
名称: Cryo-EM map of cyanobacterial photosystem I in the presence of ferredoxin and cytochrome c6 タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #1-#13 詳細: Cytochrome C6 was not be built in model because of limited resolution
由来(天然)
生物種: Thermosynechococcus elongatus BP-1 (バクテリア)
分子量
理論値: 1.08 MDa
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超分子 #2: Photosystem I trimer
超分子
名称: Photosystem I trimer / タイプ: complex / ID: 2 / 親要素: 1 / 含まれる分子: #1-#5, #7-#11 詳細: 12 subunits with 10x his-tag on N-ter of PsaF in each monomer.