- EMDB-28539: Structure of a dimeric photosystem II complex acclimated to far-r... -
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基本情報
登録情報
データベース: EMDB / ID: EMD-28539
タイトル
Structure of a dimeric photosystem II complex acclimated to far-red light
マップデータ
Far-red light-acclimated photosystem II
試料
複合体: Far-red light-acclimated photosystem II
タンパク質・ペプチド: x 16種
リガンド: x 18種
キーワード
Far-red / photosystem II / cyanobacteria / chlorophyll / PHOTOSYNTHESIS
機能・相同性
機能・相同性情報
photosystem II oxygen evolving complex / photosystem II assembly / oxygen evolving activity / photosystem II stabilization / photosystem II reaction center / photosystem II / photosynthetic electron transport chain / photosystem II / extrinsic component of membrane / chlorophyll binding ...photosystem II oxygen evolving complex / photosystem II assembly / oxygen evolving activity / photosystem II stabilization / photosystem II reaction center / photosystem II / photosynthetic electron transport chain / photosystem II / extrinsic component of membrane / chlorophyll binding / plasma membrane-derived thylakoid membrane / photosynthetic electron transport in photosystem II / phosphate ion binding / photosynthesis, light reaction / : / photosynthesis / respiratory electron transport chain / electron transfer activity / protein stabilization / iron ion binding / heme binding / metal ion binding 類似検索 - 分子機能
Photosystem II PsbU, oxygen evolving complex / Photosystem II 12 kDa extrinsic protein (PsbU) / Photosystem II PsbV, cytochrome c-550 precursor / Photosystem II cytochrome c-550 precursor / Cytochrome c-550 domain / Cytochrome c-550 domain / Photosystem II PsbX, type 1 subfamily / Photosystem II PsbO, manganese-stabilising / Manganese-stabilising protein / photosystem II polypeptide / Photosystem II PsbX ...Photosystem II PsbU, oxygen evolving complex / Photosystem II 12 kDa extrinsic protein (PsbU) / Photosystem II PsbV, cytochrome c-550 precursor / Photosystem II cytochrome c-550 precursor / Cytochrome c-550 domain / Cytochrome c-550 domain / Photosystem II PsbX, type 1 subfamily / Photosystem II PsbO, manganese-stabilising / Manganese-stabilising protein / photosystem II polypeptide / Photosystem II PsbX / Photosystem II reaction centre X protein (PsbX) / Photosystem II PsbT / Photosystem II PsbL / Photosystem II PsbL superfamily / Photosystem II PsbT superfamily / Photosystem II reaction centre T protein / PsbL protein / Photosystem II PsbK / Photosystem II CP43 reaction centre protein / Photosystem II PsbK superfamily / Photosystem II CP43 reaction centre protein superfamily / Photosystem II 4 kDa reaction centre component / Photosystem II PsbI / Photosystem II CP47 reaction centre protein / Photosystem II PsbI superfamily / Photosystem II reaction centre I protein (PSII 4.8 kDa protein) / Photosystem II reaction centre protein H / Photosystem II reaction centre protein H superfamily / Photosystem II 10 kDa phosphoprotein / Photosystem II D2 protein / Photosystem II cytochrome b559, conserved site / Photosystem II cytochrome b559, alpha subunit / Photosystem II cytochrome b559, beta subunit / Photosystem II cytochrome b559, N-terminal / Photosystem II cytochrome b559, alpha subunit, lumenal region / Photosystem II cytochrome b559, alpha subunit superfamily / Cytochrome b559, alpha (gene psbE) and beta (gene psbF)subunits / Lumenal portion of Cytochrome b559, alpha (gene psbE) subunit / Cytochrome b559 subunits heme-binding site signature. / : / Photosystem antenna protein-like / Photosystem antenna protein-like superfamily / Photosystem II protein / Outer membrane protein/outer membrane enzyme PagP, beta-barrel / : / Photosynthetic reaction centre, L/M / Photosystem II protein D1/D2 superfamily / Photosynthetic reaction centre protein / Photosynthetic reaction center proteins signature. / Cytochrome c family profile. / Cytochrome c-like domain / Cytochrome c-like domain superfamily 類似検索 - ドメイン・相同性
Photosystem II reaction center protein T / Photosystem II extrinsic protein V / Cytochrome b559 subunit alpha / Photosystem II reaction center protein L / Photosystem II reaction center protein X / Photosystem II 10 kDa phosphoprotein / Photosystem II CP47 reaction center protein / Photosystem II CP43 reaction center protein / Photosystem II D2 protein / Photosystem II extrinsic protein O ...Photosystem II reaction center protein T / Photosystem II extrinsic protein V / Cytochrome b559 subunit alpha / Photosystem II reaction center protein L / Photosystem II reaction center protein X / Photosystem II 10 kDa phosphoprotein / Photosystem II CP47 reaction center protein / Photosystem II CP43 reaction center protein / Photosystem II D2 protein / Photosystem II extrinsic protein O / Cytochrome b559 subunit beta / Photosystem II reaction center protein I / Photosystem II extrinsic protein U / Photosystem II reaction center protein K 類似検索 - 構成要素
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
K99GM140174
米国
National Science Foundation (NSF, United States)
MCB-1613022
米国
Department of Energy (DOE, United States)
DE-FG02-05ER15646
米国
引用
ジャーナル: J Biol Chem / 年: 2023 タイトル: Structure of a dimeric photosystem II complex from a cyanobacterium acclimated to far-red light. 著者: Christopher J Gisriel / Gaozhong Shen / David A Flesher / Vasily Kurashov / John H Golbeck / Gary W Brudvig / Muhamed Amin / Donald A Bryant / 要旨: Photosystem II (PSII) is the water-splitting enzyme central to oxygenic photosynthesis. To drive water oxidation, light is harvested by accessory pigments, mostly chlorophyll (Chl) a molecules, which ...Photosystem II (PSII) is the water-splitting enzyme central to oxygenic photosynthesis. To drive water oxidation, light is harvested by accessory pigments, mostly chlorophyll (Chl) a molecules, which absorb visible light (400-700 nm). Some cyanobacteria facultatively acclimate to shaded environments by altering their photosynthetic machinery to additionally absorb far-red light (FRL, 700-800 nm), a process termed far-red light photoacclimation or FaRLiP. During far-red light photoacclimation, FRL-PSII is assembled with FRL-specific isoforms of the subunits PsbA, PsbB, PsbC, PsbD, and PsbH, and some Chl-binding sites contain Chls d or f instead of the usual Chl a. The structure of an apo-FRL-PSII monomer lacking the FRL-specific PsbH subunit has previously been determined, but visualization of the dimeric complex has remained elusive. Here, we report the cryo-EM structure of a dimeric FRL-PSII complex. The site assignments for Chls d and f are consistent with those assigned in the previous apo-FRL-PSII monomeric structure. All sites that bind Chl d or Chl f at high occupancy exhibit a FRL-specific interaction of the formyl moiety of the Chl d or Chl f with the protein environment, which in some cases involves a phenylalanine sidechain. The structure retains the FRL-specific PsbH2 subunit, which appears to alter the energetic landscape of FRL-PSII, redirecting energy transfer from the phycobiliprotein complex to a Chl f molecule bound by PsbB2 that acts as a bridge for energy transfer to the electron transfer chain. Collectively, these observations extend our previous understanding of the structure-function relationship that allows PSII to function using lower energy FRL.