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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: 3j9l | ||||||
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| タイトル | Structure of Dark apoptosome from Drosophila melanogaster | ||||||
要素 | Apaf-1 related killer DARK | ||||||
キーワード | APOPTOSIS / programmed cell death | ||||||
| 機能・相同性 | 機能・相同性情報negative regulation of humoral immune response / positive regulation of glial cell apoptotic process / Formation of apoptosome / salivary gland histolysis / melanization defense response / sarcosine catabolic process / Activation of caspases through apoptosome-mediated cleavage / Regulation of the apoptosome activity / compound eye retinal cell programmed cell death / central nervous system formation ...negative regulation of humoral immune response / positive regulation of glial cell apoptotic process / Formation of apoptosome / salivary gland histolysis / melanization defense response / sarcosine catabolic process / Activation of caspases through apoptosome-mediated cleavage / Regulation of the apoptosome activity / compound eye retinal cell programmed cell death / central nervous system formation / positive regulation of apoptotic process involved in development / chaeta development / sperm individualization / apoptosome / autophagic cell death / Neutrophil degranulation / S-adenosylmethionine cycle / CARD domain binding / programmed cell death / triglyceride homeostasis / response to starvation / dendrite morphogenesis / response to gamma radiation / neuron cellular homeostasis / ADP binding / apoptotic process / structural molecule activity / ATP binding / identical protein 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: 4 Å | ||||||
データ登録者 | Pang, Y. / Bai, X. / Yan, C. / Hao, Q. / Chen, Z. / Wang, J. / Scheres, S.H.W. / Shi, Y. | ||||||
引用 | ジャーナル: Genes Dev / 年: 2015タイトル: Structure of the apoptosome: mechanistic insights into activation of an initiator caspase from Drosophila. 著者: Yuxuan Pang / Xiao-chen Bai / Chuangye Yan / Qi Hao / Zheqin Chen / Jia-Wei Wang / Sjors H W Scheres / Yigong Shi / ![]() 要旨: Apoptosis is executed by a cascade of caspase activation. The autocatalytic activation of an initiator caspase, exemplified by caspase-9 in mammals or its ortholog, Dronc, in fruit flies, is ...Apoptosis is executed by a cascade of caspase activation. The autocatalytic activation of an initiator caspase, exemplified by caspase-9 in mammals or its ortholog, Dronc, in fruit flies, is facilitated by a multimeric adaptor complex known as the apoptosome. The underlying mechanism by which caspase-9 or Dronc is activated by the apoptosome remains unknown. Here we report the electron cryomicroscopic (cryo-EM) structure of the intact apoptosome from Drosophila melanogaster at 4.0 Å resolution. Analysis of the Drosophila apoptosome, which comprises 16 molecules of the Dark protein (Apaf-1 ortholog), reveals molecular determinants that support the assembly of the 2.5-MDa complex. In the absence of dATP or ATP, Dronc zymogen potently induces formation of the Dark apoptosome, within which Dronc is efficiently activated. At 4.1 Å resolution, the cryo-EM structure of the Dark apoptosome bound to the caspase recruitment domain (CARD) of Dronc (Dronc-CARD) reveals two stacked rings of Dronc-CARD that are sandwiched between two octameric rings of the Dark protein. The specific interactions between Dronc-CARD and both the CARD and the WD40 repeats of a nearby Dark protomer are indispensable for Dronc activation. These findings reveal important mechanistic insights into the activation of initiator caspase by the apoptosome. | ||||||
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構造の表示
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ムービービューア |
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| 構造ビューア | 分子: Molmil Jmol/JSmol |
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ダウンロードとリンク
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ダウンロード
| PDBx/mmCIF形式 | 3j9l.cif.gz | 2.6 MB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb3j9l.ent.gz | 表示 | PDB形式 | |
| PDBx/mmJSON形式 | 3j9l.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
| その他 | その他のダウンロード |
-検証レポート
| 文書・要旨 | 3j9l_validation.pdf.gz | 2.1 MB | 表示 | wwPDB検証レポート |
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| 文書・詳細版 | 3j9l_full_validation.pdf.gz | 3.5 MB | 表示 | |
| XML形式データ | 3j9l_validation.xml.gz | 533 KB | 表示 | |
| CIF形式データ | 3j9l_validation.cif.gz | 793.4 KB | 表示 | |
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/j9/3j9l ftp://data.pdbj.org/pub/pdb/validation_reports/j9/3j9l | HTTPS FTP |
-関連構造データ
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リンク
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集合体
| 登録構造単位 | ![]()
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要素
| #1: タンパク質 | 分子量: 112834.266 Da / 分子数: 16 / 由来タイプ: 天然 由来: (天然) ![]() 参照: UniProt: Q7KLI1 #2: 化合物 | ChemComp-DTP / |
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-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: Dark apoptosome / タイプ: COMPLEX |
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| 分子量 | 値: 2.5 MDa / 実験値: NO |
| 緩衝液 | 名称: 25 mM Tris, pH 8.0, 150 mM NaCl, 5 mM DTT / pH: 8 / 詳細: 25 mM Tris, pH 8.0, 150 mM NaCl, 5 mM DTT |
| 試料 | 濃度: 0.15 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
| 試料支持 | 詳細: glow-discharged holey carbon grids (Quantifoil CuR2/2) with home-made continuous carbon film |
| 急速凍結 | 装置: FEI VITROBOT MARK II / 凍結剤: ETHANE / Temp: 85 K / 湿度: 100 % 詳細: Blot for 2 seconds before plunging into liquid ethane (FEI VITROBOT MARK II). 手法: Blot for 2 seconds before plunging |
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電子顕微鏡撮影
| 実験機器 | ![]() モデル: Tecnai Polara / 画像提供: FEI Company |
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| 顕微鏡 | モデル: FEI POLARA 300 / 日付: 2013年11月17日 |
| 電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: FLOOD BEAM |
| 電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 78000 X / 倍率(補正後): 104748 X / 最大 デフォーカス(公称値): 6600 nm / 最小 デフォーカス(公称値): 1600 nm / Cs: 2 mm |
| 試料ホルダ | 試料ホルダーモデル: GATAN LIQUID NITROGEN / 最高温度: 90 K / 最低温度: 80 K |
| 撮影 | 電子線照射量: 28 e/Å2 フィルム・検出器のモデル: FEI FALCON II (4k x 4k) |
| 画像スキャン | デジタル画像の数: 693 |
| 放射 | プロトコル: SINGLE WAVELENGTH / 単色(M)・ラウエ(L): M / 散乱光タイプ: x-ray |
| 放射波長 | 相対比: 1 |
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解析
| EMソフトウェア |
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| CTF補正 | 詳細: Each particle | ||||||||||||
| 対称性 | 点対称性: D8 (2回x8回 2面回転対称) | ||||||||||||
| 3次元再構成 | 解像度: 4 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 9354 / ピクセルサイズ(公称値): 1.34 Å / ピクセルサイズ(実測値): 1.34 Å 詳細: To correct for beam-induced movements, the 16 video frames for each micrograph were first aligned using whole-image motion correction. Then particle-based beam-induced movement correction was ...詳細: To correct for beam-induced movements, the 16 video frames for each micrograph were first aligned using whole-image motion correction. Then particle-based beam-induced movement correction was performed using statistical movie processing in RELION. 対称性のタイプ: POINT | ||||||||||||
| 精密化ステップ | サイクル: LAST
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