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データを開く
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基本情報
登録情報 | データベース: PDB / ID: 9c0s | |||||||||
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タイトル | Carbon monoxide dehydrogenase/acetyl-CoA synthase (CODH/ACS) pentamer from Methanosarcina thermophila | |||||||||
![]() | (Acetyl-CoA decarbonylase/synthase complex subunit ...) x 3 | |||||||||
![]() | OXIDOREDUCTASE / CO-dehydrogenase / acetyl-CoA synthase / Methanosarcina thermophila | |||||||||
機能・相同性 | ![]() methanogenesis, from acetate / CO-methylating acetyl-CoA synthase / CO-methylating acetyl-CoA synthase activity / anaerobic carbon monoxide dehydrogenase / anaerobic carbon-monoxide dehydrogenase activity / hydroxylamine reductase activity / acetyl-CoA metabolic process / acetyltransferase activity / iron-sulfur cluster binding / nickel cation binding ...methanogenesis, from acetate / CO-methylating acetyl-CoA synthase / CO-methylating acetyl-CoA synthase activity / anaerobic carbon monoxide dehydrogenase / anaerobic carbon-monoxide dehydrogenase activity / hydroxylamine reductase activity / acetyl-CoA metabolic process / acetyltransferase activity / iron-sulfur cluster binding / nickel cation binding / peroxidase activity / response to hydrogen peroxide / 4 iron, 4 sulfur cluster binding / iron ion binding 類似検索 - 分子機能 | |||||||||
生物種 | ![]() ![]() | |||||||||
手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.2 Å | |||||||||
![]() | Biester, A. / Drennan, C.L. | |||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Capturing a methanogenic carbon monoxide dehydrogenase/acetyl-CoA synthase complex via cryogenic electron microscopy. 著者: Alison Biester / David A Grahame / Catherine L Drennan / ![]() 要旨: Approximately two-thirds of the estimated one-billion metric tons of methane produced annually by methanogens is derived from the cleavage of acetate. Acetate is broken down by a Ni-Fe-S-containing A- ...Approximately two-thirds of the estimated one-billion metric tons of methane produced annually by methanogens is derived from the cleavage of acetate. Acetate is broken down by a Ni-Fe-S-containing A-cluster within the enzyme acetyl-CoA synthase (ACS) to carbon monoxide (CO) and a methyl group (CH). The methyl group ultimately forms the greenhouse gas methane, whereas CO is converted to the greenhouse gas carbon dioxide (CO) by a Ni-Fe-S-containing C-cluster within the enzyme carbon monoxide dehydrogenase (CODH). Although structures have been solved of CODH/ACS from acetogens, which use these enzymes to make acetate from CO, no structure of a CODH/ACS from a methanogen has been reported. In this work, we use cryo-electron microscopy to reveal the structure of a methanogenic CODH and CODH/ACS from (CODH/ACS). We find that the N-terminal domain of acetogenic ACS, which is missing in all methanogens, is replaced by a domain of CODH. This CODH domain provides a channel for CO to travel between the two catalytic Ni-Fe-S clusters. It generates the binding surface for ACS and creates a remarkably similar CO alcove above the A-cluster using residues from CODH rather than ACS. Comparison of our CODH/ACS structure with our CODH structure reveals a molecular mechanism to restrict gas flow from the CO channel when ACS departs, preventing CO escape into the cell. Overall, these long-awaited structures of a methanogenic CODH/ACS reveal striking functional similarities to their acetogenic counterparts despite a substantial difference in domain organization. | |||||||||
履歴 |
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 436.9 KB | 表示 | ![]() |
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PDB形式 | ![]() | 353 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
関連構造データ | ![]() 45091MC ![]() 9c0qC ![]() 9c0rC ![]() 9c0tC C: 同じ文献を引用 ( M: このデータのモデリングに利用したマップデータ |
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類似構造データ | 類似検索 - 機能・相同性 ![]() |
実験データセット #1 | データ参照: ![]() |
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集合体
登録構造単位 | ![]()
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要素
-Acetyl-CoA decarbonylase/synthase complex subunit ... , 3種, 5分子 ABCDE
#1: タンパク質 | 分子量: 87855.852 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() 参照: UniProt: Q9C4Z4, anaerobic carbon monoxide dehydrogenase #2: タンパク質 | 分子量: 18587.375 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() #3: タンパク質 | | 分子量: 52802.227 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
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-非ポリマー , 5種, 14分子 








#4: 化合物 | ChemComp-SF4 / #5: 化合物 | #6: 化合物 | ChemComp-F3S / | #7: 化合物 | ChemComp-CMO / | #8: 化合物 | |
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-詳細
研究の焦点であるリガンドがあるか | Y |
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Has protein modification | Y |
-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
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EM実験 | 試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法 |
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試料調製
構成要素 | 名称: Acetyl-CoA decarbonylase/synthase complex / タイプ: COMPLEX 詳細: Carbon monoxide dehydrogenase heterotetramer, alpha and epsilon subunits, with acetyl-CoA synthase beta subunit Entity ID: #1-#3 / 由来: NATURAL | |||||||||||||||
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分子量 | 値: 0.265 MDa / 実験値: NO | |||||||||||||||
由来(天然) | 生物種: ![]() ![]() | |||||||||||||||
緩衝液 | pH: 7.2 | |||||||||||||||
緩衝液成分 |
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試料 | 濃度: 1 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | |||||||||||||||
急速凍結 | 凍結剤: ETHANE / 湿度: 82 % / 凍結前の試料温度: 298 K / 詳細: SPT Labtech chameleon plunger |
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電子顕微鏡撮影
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI TITAN KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 130000 X / 最大 デフォーカス(公称値): 1750 nm / 最小 デフォーカス(公称値): 0 nm / Cs: 2.7 mm / C2レンズ絞り径: 50 µm |
撮影 | 電子線照射量: 47.1 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) |
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解析
EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 1124872 | ||||||||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.2 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 33375 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
原子モデル構築 | B value: 76.1221 / 空間: REAL / Target criteria: Correlation coefficient 詳細: Initial model was generated using AlphaFold, fit to the map using ChimeraX, followed by rigid body fitting in phenix, and finally iterative real space refinement in coot and phenix. | ||||||||||||||||||||||||
原子モデル構築 | Source name: AlphaFold / タイプ: in silico model | ||||||||||||||||||||||||
拘束条件 |
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