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基本情報
登録情報 | データベース: PDB / ID: 8byl | ||||||
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タイトル | Cryo-EM structure of SKP1-SKP2-CKS1 from the SCFSKP2 E3 ligase complex | ||||||
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![]() | CELL CYCLE / cyclin-dependent kinase / signalling / ubiquitinationCell cycle | ||||||
機能・相同性 | ![]() cyclin-dependent protein kinase regulator activity / regulation of lens fiber cell differentiation / negative regulation of cyclin-dependent protein kinase activity / negative regulation of cardiac muscle tissue regeneration / mitotic cell cycle phase transition / negative regulation of kinase activity / positive regulation of protein polyubiquitination / autophagic cell death / FOXO-mediated transcription of cell cycle genes / negative regulation of phosphorylation ...cyclin-dependent protein kinase regulator activity / regulation of lens fiber cell differentiation / negative regulation of cyclin-dependent protein kinase activity / negative regulation of cardiac muscle tissue regeneration / mitotic cell cycle phase transition / negative regulation of kinase activity / positive regulation of protein polyubiquitination / autophagic cell death / FOXO-mediated transcription of cell cycle genes / negative regulation of phosphorylation / negative regulation of epithelial cell proliferation involved in prostate gland development / F-box domain binding / negative regulation of cyclin-dependent protein serine/threonine kinase activity / Aberrant regulation of mitotic exit in cancer due to RB1 defects / regulation of cell cycle G1/S phase transition / PcG protein complex / regulation of exit from mitosis / negative regulation of epithelial cell apoptotic process / epithelial cell proliferation involved in prostate gland development / ubiquitin ligase activator activity / positive regulation of ubiquitin protein ligase activity / cyclin-dependent protein serine/threonine kinase inhibitor activity / Cul7-RING ubiquitin ligase complex / maintenance of protein location in nucleus / Loss of Function of FBXW7 in Cancer and NOTCH1 Signaling / RHO GTPases activate CIT / cyclin-dependent protein serine/threonine kinase activator activity / nuclear export / AKT phosphorylates targets in the cytosol / regulation of cyclin-dependent protein serine/threonine kinase activity / epithelial cell apoptotic process / cellular response to antibiotic / SCF ubiquitin ligase complex / Cul4A-RING E3 ubiquitin ligase complex / molecular function inhibitor activity / SCF-dependent proteasomal ubiquitin-dependent protein catabolic process / positive regulation of intracellular estrogen receptor signaling pathway / cellular response to lithium ion / ubiquitin ligase complex scaffold activity / p53-Dependent G1 DNA Damage Response / Prolactin receptor signaling / protein kinase inhibitor activity / PTK6 Regulates Cell Cycle / : / Constitutive Signaling by AKT1 E17K in Cancer / negative regulation of vascular associated smooth muscle cell proliferation / Defective binding of RB1 mutants to E2F1,(E2F2, E2F3) / inner ear development / regulation of G1/S transition of mitotic cell cycle / cullin family protein binding / negative regulation of mitotic cell cycle / protein K63-linked ubiquitination / protein monoubiquitination / Estrogen-dependent nuclear events downstream of ESR-membrane signaling / response to amino acid / ubiquitin-like ligase-substrate adaptor activity / TP53 Regulates Transcription of Genes Involved in G1 Cell Cycle Arrest / positive regulation of double-strand break repair via homologous recombination / protein K48-linked ubiquitination / Cyclin E associated events during G1/S transition / response to glucose / response to cadmium ion / Cyclin A:Cdk2-associated events at S phase entry / cyclin-dependent protein kinase holoenzyme complex / Nuclear events stimulated by ALK signaling in cancer / Notch signaling pathway / positive regulation of microtubule polymerization / FLT3 Signaling / Hsp70 protein binding / cyclin binding / regulation of mitotic cell cycle / regulation of cell migration / Regulation of BACH1 activity / MAP3K8 (TPL2)-dependent MAPK1/3 activation / molecular function activator activity / ubiquitin binding / positive regulation of DNA replication / SCF-beta-TrCP mediated degradation of Emi1 / NIK-->noncanonical NF-kB signaling / Vpu mediated degradation of CD4 / placenta development / Dectin-1 mediated noncanonical NF-kB signaling / sensory perception of sound / Activation of NF-kappaB in B cells / Degradation of GLI1 by the proteasome / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Iron uptake and transport / Negative regulation of NOTCH4 signaling / Degradation of GLI2 by the proteasome / GLI3 is processed to GLI3R by the proteasome / FBXL7 down-regulates AURKA during mitotic entry and in early mitosis / APC/C:Cdh1 mediated degradation of Cdc20 and other APC/C:Cdh1 targeted proteins in late mitosis/early G1 / potassium ion transport / negative regulation of cell growth / beta-catenin binding / Degradation of beta-catenin by the destruction complex / DNA Damage/Telomere Stress Induced Senescence / NOTCH1 Intracellular Domain Regulates Transcription / response to peptide hormone / CLEC7A (Dectin-1) signaling 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: 3.5 Å | ||||||
![]() | Rowland, R.J. / Salamina, M. / Endicott, J.A. / Noble, M.E.M. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Cryo-EM structure of SKP1-SKP2-CKS1 in complex with CDK2-cyclin A-p27KIP1. 著者: Rhianna J Rowland / Richard Heath / Daniel Maskell / Rebecca F Thompson / Neil A Ranson / James N Blaza / Jane A Endicott / Martin E M Noble / Marco Salamina / ![]() 要旨: p27KIP1 (cyclin-dependent kinase inhibitor 1B, p27) is a member of the CIP/KIP family of CDK (cyclin dependent kinase) regulators that inhibit cell cycle CDKs. p27 phosphorylation by CDK1/2, signals ...p27KIP1 (cyclin-dependent kinase inhibitor 1B, p27) is a member of the CIP/KIP family of CDK (cyclin dependent kinase) regulators that inhibit cell cycle CDKs. p27 phosphorylation by CDK1/2, signals its recruitment to the SCF (S-phase kinase associated protein 1 (SKP1)-cullin-SKP2) E3 ubiquitin ligase complex for proteasomal degradation. The nature of p27 binding to SKP2 and CKS1 was revealed by the SKP1-SKP2-CKS1-p27 phosphopeptide crystal structure. Subsequently, a model for the hexameric CDK2-cyclin A-CKS1-p27-SKP1-SKP2 complex was proposed by overlaying an independently determined CDK2-cyclin A-p27 structure. Here we describe the experimentally determined structure of the isolated CDK2-cyclin A-CKS1-p27-SKP1-SKP2 complex at 3.4 Å global resolution using cryogenic electron microscopy. This structure supports previous analysis in which p27 was found to be structurally dynamic, transitioning from disordered to nascent secondary structure on target binding. We employed 3D variability analysis to further explore the conformational space of the hexameric complex and uncovered a previously unidentified hinge motion centred on CKS1. This flexibility gives rise to open and closed conformations of the hexameric complex that we propose may contribute to p27 regulation by facilitating recognition with SCF. This 3D variability analysis further informed particle subtraction and local refinement approaches to enhance the local resolution of the complex. | ||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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ダウンロードとリンク
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PDBx/mmCIF形式 | ![]() | 130.1 KB | 表示 | ![]() |
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PDB形式 | ![]() | 93.8 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 1.3 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.3 MB | 表示 | |
XML形式データ | ![]() | 34.5 KB | 表示 | |
CIF形式データ | ![]() | 48.7 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 16327MC ![]() 8byaC ![]() 8bzoC 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 ![]() |
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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: 18679.965 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() |
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#2: タンパク質 | 分子量: 47817.785 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() |
#3: 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) ![]() ![]() ![]() |
#4: タンパク質 | 分子量: 22188.303 Da / 分子数: 1 / 由来タイプ: 組換発現 / 詳細: DGSPNAGSVEQ(TPO)PKK / 由来: (組換発現) ![]() ![]() ![]() |
研究の焦点であるリガンドがあるか | N |
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: Locally refined complex of SKP1-SKP2-CKS1-p27 from the hexametric SCFSKP2 E3 Ligase complex タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT |
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分子量 | 値: 0.066 MDa / 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 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
試料支持 | グリッドの材料: COPPER / グリッドのサイズ: 400 divisions/in. / グリッドのタイプ: Quantifoil R1.2/1.3 |
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 95 % / 凍結前の試料温度: 278.15 K |
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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): 3000 nm / 最小 デフォーカス(公称値): 1000 nm / Cs: 2.7 mm / C2レンズ絞り径: 70 µm |
試料ホルダ | 凍結剤: NITROGEN |
撮影 | 平均露光時間: 9 sec. / 電子線照射量: 65 e/Å2 フィルム・検出器のモデル: GATAN K2 SUMMIT (4k 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: 1110356 | ||||||||||||||||||||||||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.5 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 136325 / クラス平均像の数: 1 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | B value: 122 / プロトコル: RIGID BODY FIT / 空間: REAL 詳細: Initial fitting was performed in chimera followed by real space refinement in Phenix | ||||||||||||||||||||||||||||||||||||||||
拘束条件 |
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