+
データを開く
-
基本情報
登録情報 | データベース: PDB / ID: 7nj0 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
タイトル | CryoEM structure of the human Separase-Cdk1-cyclin B1-Cks1 complex | |||||||||
![]() |
| |||||||||
![]() | HYDROLASE / autoinhibition phosphate-binding pocket pseudosubstrate Scc1 | |||||||||
機能・相同性 | ![]() negative regulation of sister chromatid cohesion / separase / regulation of Schwann cell differentiation / cyclin A1-CDK1 complex / regulation of attachment of mitotic spindle microtubules to kinetochore / pronuclear fusion / cyclin B1-CDK1 complex / positive regulation of mitochondrial ATP synthesis coupled electron transport / Mitotic Prophase / positive regulation of mitotic sister chromatid segregation ...negative regulation of sister chromatid cohesion / separase / regulation of Schwann cell differentiation / cyclin A1-CDK1 complex / regulation of attachment of mitotic spindle microtubules to kinetochore / pronuclear fusion / cyclin B1-CDK1 complex / positive regulation of mitochondrial ATP synthesis coupled electron transport / Mitotic Prophase / positive regulation of mitotic sister chromatid segregation / meiotic chromosome separation / histone kinase activity / mitotic cell cycle phase transition / Golgi disassembly / microtubule cytoskeleton organization involved in mitosis / ventricular cardiac muscle cell development / G2/M DNA replication checkpoint / E2F-enabled inhibition of pre-replication complex formation / Depolymerization of the Nuclear Lamina / positive regulation of attachment of spindle microtubules to kinetochore / MASTL Facilitates Mitotic Progression / mitotic sister chromatid separation / regulation of mitotic cell cycle spindle assembly checkpoint / Activation of NIMA Kinases NEK9, NEK6, NEK7 / homologous chromosome segregation / mitotic nuclear membrane disassembly / : / cyclin A2-CDK1 complex / Phosphorylation of Emi1 / patched binding / establishment of mitotic spindle localization / meiotic spindle organization / Transcriptional regulation by RUNX2 / Nuclear Pore Complex (NPC) Disassembly / Phosphorylation of the APC/C / outer kinetochore / positive regulation of mitotic metaphase/anaphase transition / Transcription of E2F targets under negative control by p107 (RBL1) and p130 (RBL2) in complex with HDAC1 / protein localization to kinetochore / RNA polymerase II CTD heptapeptide repeat Y1 kinase activity / RNA polymerase II CTD heptapeptide repeat S2 kinase activity / RNA polymerase II CTD heptapeptide repeat T4 kinase activity / RNA polymerase II CTD heptapeptide repeat S5 kinase activity / RNA polymerase II CTD heptapeptide repeat S7 kinase activity / Initiation of Nuclear Envelope (NE) Reformation / Polo-like kinase mediated events / response to copper ion / cyclin-dependent protein serine/threonine kinase activator activity / Golgi Cisternae Pericentriolar Stack Reorganization / Condensation of Prometaphase Chromosomes / centrosome cycle / chromosome condensation / [RNA-polymerase]-subunit kinase / cyclin-dependent protein serine/threonine kinase regulator activity / SCF ubiquitin ligase complex / mitotic metaphase chromosome alignment / MAPK3 (ERK1) activation / cyclin-dependent protein kinase activity / response to amine / G1/S-Specific Transcription / mitotic G2 DNA damage checkpoint signaling / microtubule organizing center / : / Regulation of APC/C activators between G1/S and early anaphase / ubiquitin-like protein ligase binding / mitotic cytokinesis / mitotic sister chromatid segregation / catalytic activity / regulation of embryonic development / cysteine-type endopeptidase inhibitor activity / protein deubiquitination / response to axon injury / chromosome organization / cyclin-dependent kinase / cyclin-dependent protein serine/threonine kinase activity / Chk1/Chk2(Cds1) mediated inactivation of Cyclin B:Cdk1 complex / Regulation of MITF-M-dependent genes involved in cell cycle and proliferation / Cyclin A/B1/B2 associated events during G2/M transition / response to cadmium ion / Nuclear events stimulated by ALK signaling in cancer / cyclin-dependent protein kinase holoenzyme complex / positive regulation of cardiac muscle cell proliferation / positive regulation of G2/M transition of mitotic cell cycle / epithelial cell differentiation / RNA polymerase II CTD heptapeptide repeat kinase activity / Loss of Nlp from mitotic centrosomes / Loss of proteins required for interphase microtubule organization from the centrosome / peptidyl-threonine phosphorylation / ERK1 and ERK2 cascade / Recruitment of mitotic centrosome proteins and complexes / Hsp70 protein binding / APC/C:Cdc20 mediated degradation of Cyclin B / positive regulation of mitotic cell cycle / cysteine-type peptidase activity / Recruitment of NuMA to mitotic centrosomes / Anchoring of the basal body to the plasma membrane / Resolution of Sister Chromatid Cohesion / cyclin binding / regulation of mitotic cell cycle / TP53 Regulates Transcription of Genes Involved in G2 Cell Cycle Arrest 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: 3.6 Å | |||||||||
![]() | Yu, J. / Raia, P. / Ghent, C.M. / Raisch, T. / Sadian, Y. / Barford, D. / Raunser, S. / Morgan, D.O. / Boland, A. | |||||||||
資金援助 | ![]() ![]()
| |||||||||
![]() | ![]() タイトル: Structural basis of human separase regulation by securin and CDK1-cyclin B1. 著者: Jun Yu / Pierre Raia / Chloe M Ghent / Tobias Raisch / Yashar Sadian / Simone Cavadini / Pramod M Sabale / David Barford / Stefan Raunser / David O Morgan / Andreas Boland / ![]() ![]() ![]() ![]() 要旨: In early mitosis, the duplicated chromosomes are held together by the ring-shaped cohesin complex. Separation of chromosomes during anaphase is triggered by separase-a large cysteine endopeptidase ...In early mitosis, the duplicated chromosomes are held together by the ring-shaped cohesin complex. Separation of chromosomes during anaphase is triggered by separase-a large cysteine endopeptidase that cleaves the cohesin subunit SCC1 (also known as RAD21). Separase is activated by degradation of its inhibitors, securin and cyclin B, but the molecular mechanisms of separase regulation are not clear. Here we used cryogenic electron microscopy to determine the structures of human separase in complex with either securin or CDK1-cyclin B1-CKS1. In both complexes, separase is inhibited by pseudosubstrate motifs that block substrate binding at the catalytic site and at nearby docking sites. As in Caenorhabditis elegans and yeast, human securin contains its own pseudosubstrate motifs. By contrast, CDK1-cyclin B1 inhibits separase by deploying pseudosubstrate motifs from intrinsically disordered loops in separase itself. One autoinhibitory loop is oriented by CDK1-cyclin B1 to block the catalytic sites of both separase and CDK1. Another autoinhibitory loop blocks substrate docking in a cleft adjacent to the separase catalytic site. A third separase loop contains a phosphoserine that promotes complex assembly by binding to a conserved phosphate-binding pocket in cyclin B1. Our study reveals the diverse array of mechanisms by which securin and CDK1-cyclin B1 bind and inhibit separase, providing the molecular basis for the robust control of chromosome segregation. | |||||||||
履歴 |
|
-
構造の表示
ムービー |
![]() |
---|---|
構造ビューア | 分子: ![]() ![]() |
-
ダウンロードとリンク
-
ダウンロード
PDBx/mmCIF形式 | ![]() | 358.5 KB | 表示 | ![]() |
---|---|---|---|---|
PDB形式 | ![]() | 267.2 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 |
---|
-関連構造データ
-
リンク
-
集合体
登録構造単位 | ![]()
|
---|---|
1 |
|
-
要素
#1: タンパク質 | 分子量: 244677.328 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() 参照: UniProt: O95997, UniProt: Q14674, separase |
---|---|
#2: タンパク質 | 分子量: 36667.098 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() 参照: UniProt: P06493, cyclin-dependent kinase, [RNA-polymerase]-subunit kinase |
#3: タンパク質 | 分子量: 52625.723 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() 参照: UniProt: P14635 |
#4: タンパク質 | 分子量: 9679.211 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() 参照: UniProt: P61024 |
#5: 化合物 | ChemComp-PO4 / |
研究の焦点であるリガンドがあるか | Y |
Has protein modification | Y |
-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
---|---|
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 |
-
試料調製
構成要素 | 名称: Mutual inhibitory complex of human separase-Cdk1-cyclin B1-Cks1 (CCC) complex. タイプ: COMPLEX / Entity ID: #1-#4 / 由来: RECOMBINANT |
---|---|
分子量 | 実験値: NO |
由来(天然) | 生物種: ![]() |
由来(組換発現) | 生物種: ![]() ![]() |
緩衝液 | pH: 7.8 |
試料 | 濃度: 0.05 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES 詳細: The sample was monodisperse. We use graphene oxide-coated EM grids. |
試料支持 | グリッドの材料: GOLD / グリッドのタイプ: Quantifoil R1.2/1.3 |
急速凍結 | 装置: LEICA EM GP / 凍結剤: ETHANE / 湿度: 90 % / 凍結前の試料温度: 293 K |
-
電子顕微鏡撮影
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
---|---|
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): 105000 X / 最大 デフォーカス(公称値): 2500 nm / 最小 デフォーカス(公称値): 1300 nm / Calibrated defocus min: 1300 nm / 最大 デフォーカス(補正後): 2500 nm / C2レンズ絞り径: 50 µm / アライメント法: COMA FREE |
試料ホルダ | 凍結剤: NITROGEN 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER |
撮影 | 平均露光時間: 3 sec. / 電子線照射量: 78 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) 撮影したグリッド数: 5 / 実像数: 13640 |
-
解析
ソフトウェア | 名称: PHENIX / バージョン: 1.18rc5_3822: / 分類: 精密化 | |||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
EMソフトウェア |
| |||||||||||||||||||||||||||
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | |||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.6 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 312836 / 対称性のタイプ: POINT | |||||||||||||||||||||||||||
原子モデル構築 | プロトコル: AB INITIO MODEL | |||||||||||||||||||||||||||
原子モデル構築 |
| |||||||||||||||||||||||||||
拘束条件 |
|