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基本情報
登録情報 | データベース: PDB / ID: 8ttb | ||||||||||||
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タイトル | Cryo-EM structure of the PP2A:B55-ARPP19 complex | ||||||||||||
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![]() | SIGNALING PROTEIN / HYDROLASE / Protein Phosphatase 2A:B55 holoenzyme / ARPP19 inhibitor / cell cycle regulation | ||||||||||||
機能・相同性 | ![]() phosphatase inhibitor activity / regulation of chromosome segregation / meiotic spindle elongation / Integration of energy metabolism / PP2A-mediated dephosphorylation of key metabolic factors / MASTL Facilitates Mitotic Progression / mitotic sister chromatid separation / regulation of meiotic cell cycle process involved in oocyte maturation / protein phosphatase type 2A complex / protein serine/threonine phosphatase complex ...phosphatase inhibitor activity / regulation of chromosome segregation / meiotic spindle elongation / Integration of energy metabolism / PP2A-mediated dephosphorylation of key metabolic factors / MASTL Facilitates Mitotic Progression / mitotic sister chromatid separation / regulation of meiotic cell cycle process involved in oocyte maturation / protein phosphatase type 2A complex / protein serine/threonine phosphatase complex / peptidyl-threonine dephosphorylation / meiotic sister chromatid cohesion, centromeric / peptidyl-serine dephosphorylation / FAR/SIN/STRIPAK complex / : / Regulation of glycolysis by fructose 2,6-bisphosphate metabolism / female meiotic nuclear division / Inhibition of replication initiation of damaged DNA by RB1/E2F1 / protein phosphatase regulator activity / GABA receptor binding / APC truncation mutants have impaired AXIN binding / AXIN missense mutants destabilize the destruction complex / Truncations of AMER1 destabilize the destruction complex / protein antigen binding / ERKs are inactivated / Initiation of Nuclear Envelope (NE) Reformation / positive regulation of extrinsic apoptotic signaling pathway in absence of ligand / Beta-catenin phosphorylation cascade / Signaling by GSK3beta mutants / CTNNB1 S33 mutants aren't phosphorylated / CTNNB1 S37 mutants aren't phosphorylated / CTNNB1 S45 mutants aren't phosphorylated / CTNNB1 T41 mutants aren't phosphorylated / Co-stimulation by CD28 / regulation of growth / histone H2AXS139 phosphatase activity / RNA polymerase II CTD heptapeptide repeat Y1 phosphatase activity / RNA polymerase II CTD heptapeptide repeat T4 phosphatase activity / RNA polymerase II CTD heptapeptide repeat S2 phosphatase activity / RNA polymerase II CTD heptapeptide repeat S5 phosphatase activity / RNA polymerase II CTD heptapeptide repeat S7 phosphatase activity / MAP kinase serine/threonine phosphatase activity / myosin phosphatase activity / Disassembly of the destruction complex and recruitment of AXIN to the membrane / calmodulin-dependent protein phosphatase activity / negative regulation of epithelial to mesenchymal transition / response to morphine / Co-inhibition by CTLA4 / protein phosphatase inhibitor activity / Platelet sensitization by LDL / protein-serine/threonine phosphatase / protein serine/threonine phosphatase activity / negative regulation of glycolytic process through fructose-6-phosphate / positive regulation of NLRP3 inflammasome complex assembly / ERK/MAPK targets / mesoderm development / T cell homeostasis / vascular endothelial cell response to oscillatory fluid shear stress / regulation of G1/S transition of mitotic cell cycle / regulation of cell differentiation / phosphoprotein phosphatase activity / chromosome, centromeric region / DARPP-32 events / lateral plasma membrane / positive regulation of protein serine/threonine kinase activity / enzyme-substrate adaptor activity / negative regulation of hippo signaling / potassium channel regulator activity / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / Cyclin A/B1/B2 associated events during G2/M transition / protein dephosphorylation / spindle assembly / Amplification of signal from unattached kinetochores via a MAD2 inhibitory signal / Mitotic Prometaphase / positive regulation of gluconeogenesis / EML4 and NUDC in mitotic spindle formation / Loss of Nlp from mitotic centrosomes / Loss of proteins required for interphase microtubule organization from the centrosome / Recruitment of mitotic centrosome proteins and complexes / negative regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction / protein tyrosine phosphatase activity / Recruitment of NuMA to mitotic centrosomes / Anchoring of the basal body to the plasma membrane / Resolution of Sister Chromatid Cohesion / protein phosphatase 2A binding / AURKA Activation by TPX2 / Turbulent (oscillatory, disturbed) flow shear stress activates signaling by PIEZO1 and integrins in endothelial cells / meiotic cell cycle / positive regulation of D-glucose import / chromosome segregation / RAF activation / RHO GTPases Activate Formins / response to lead ion / Spry regulation of FGF signaling / Degradation of beta-catenin by the destruction complex / PKR-mediated signaling / tau protein binding / spindle pole / Negative regulation of MAPK pathway / G2/M transition of mitotic cell cycle 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: 2.77 Å | ||||||||||||
![]() | Fuller, J.R. / Padi, S.K.R. / Peti, W. / Page, R. | ||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Cryo-EM structures of PP2A:B55-FAM122A and PP2A:B55-ARPP19. 著者: Sathish K R Padi / Margaret R Vos / Rachel J Godek / James R Fuller / Thomas Kruse / Jamin B Hein / Jakob Nilsson / Matthew S Kelker / Rebecca Page / Wolfgang Peti / ![]() ![]() 要旨: Progression through the cell cycle is controlled by regulated and abrupt changes in phosphorylation. Mitotic entry is initiated by increased phosphorylation of mitotic proteins, a process driven by ...Progression through the cell cycle is controlled by regulated and abrupt changes in phosphorylation. Mitotic entry is initiated by increased phosphorylation of mitotic proteins, a process driven by kinases, whereas mitotic exit is achieved by counteracting dephosphorylation, a process driven by phosphatases, especially PP2A:B55. Although the role of kinases in mitotic entry is well established, recent data have shown that mitosis is only successfully initiated when the counterbalancing phosphatases are also inhibited. Inhibition of PP2A:B55 is achieved by the intrinsically disordered proteins ARPP19 and FAM122A. Despite their critical roles in mitosis, the mechanisms by which they achieve PP2A:B55 inhibition is unknown. Here, we report the single-particle cryo-electron microscopy structures of PP2A:B55 bound to phosphorylated ARPP19 and FAM122A. Consistent with our complementary NMR spectroscopy studies, both intrinsically disordered proteins bind PP2A:B55, but do so in highly distinct manners, leveraging multiple distinct binding sites on B55. Our extensive structural, biophysical and biochemical data explain how substrates and inhibitors are recruited to PP2A:B55 and provide a molecular roadmap for the development of therapeutic interventions for PP2A:B55-related diseases. | ||||||||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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-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 | ![]() | 51.6 KB | 表示 | |
CIF形式データ | ![]() | 78.3 KB | 表示 | |
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-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
-Serine/threonine-protein phosphatase 2A ... , 3種, 3分子 ABC
#1: タンパク質 | 分子量: 64957.980 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: 52044.289 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: 35845.375 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() 参照: UniProt: P67775, protein-serine/threonine phosphatase |
-タンパク質 , 1種, 1分子 D
#4: タンパク質 | 分子量: 12620.241 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() |
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-非ポリマー , 2種, 2分子 


#5: 化合物 | ChemComp-FE / |
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#6: 化合物 | ChemComp-ZN / |
-詳細
研究の焦点であるリガンドがあるか | Y |
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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: Quadruple complex of PP2A:B55 (PP2Aa:PP2Ac:B55) bound to thiophosphorylated ARPP19 タイプ: COMPLEX / Entity ID: #1-#4 / 由来: MULTIPLE SOURCES | ||||||||||||||||||||||||||||||
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分子量 | 値: 0.165 MDa / 実験値: NO | ||||||||||||||||||||||||||||||
緩衝液 | pH: 8 詳細: CHAPSO was added only immediately prior to vitrification | ||||||||||||||||||||||||||||||
緩衝液成分 |
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試料 | 濃度: 1.2 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | ||||||||||||||||||||||||||||||
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 291 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): 105000 X / 最大 デフォーカス(公称値): 1900 nm / 最小 デフォーカス(公称値): 700 nm / Calibrated defocus min: 390 nm / 最大 デフォーカス(補正後): 2600 nm / Cs: 2.7 mm / C2レンズ絞り径: 50 µm / アライメント法: ZEMLIN TABLEAU |
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 | 電子線照射量: 70 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: 1 詳細: Camera was operated in CDS mode, with hardware binning of super-resolution pixels, writing movies with 62 frames |
電子光学装置 | エネルギーフィルター名称: GIF Bioquantum / エネルギーフィルタースリット幅: 20 eV |
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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: 1170216 | ||||||||||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 2.77 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 52934 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | プロトコル: FLEXIBLE FIT / 空間: REAL / Target criteria: Cross-correlation 詳細: Iterating between manual refinement in Coot and automated real-space refinement in Phenix | ||||||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 |
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精密化 | 交差検証法: NONE 立体化学のターゲット値: GeoStd + Monomer Library + CDL v1.2 | ||||||||||||||||||||||||||||||||||||||||||||||||
原子変位パラメータ | Biso mean: 86.62 Å2 | ||||||||||||||||||||||||||||||||||||||||||||||||
拘束条件 |
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