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基本情報
登録情報 | データベース: PDB / ID: 7myn | ||||||||||||||||||||||||||||||||||||||||||
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タイトル | Cryo-EM Structure of p110alpha in complex with p85alpha | ||||||||||||||||||||||||||||||||||||||||||
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![]() | TRANSFERASE / phosphoinositide 3-kinase (PI3K) / activation / inhibition / activity-dependent conformational changes | ||||||||||||||||||||||||||||||||||||||||||
機能・相同性 | ![]() perinuclear endoplasmic reticulum membrane / regulation of toll-like receptor 4 signaling pathway / response to muscle inactivity / phosphatidylinositol kinase activity / negative regulation of actin filament depolymerization / regulation of actin filament organization / response to L-leucine / positive regulation of focal adhesion disassembly / response to butyrate / 1-phosphatidylinositol-3-kinase regulator activity ...perinuclear endoplasmic reticulum membrane / regulation of toll-like receptor 4 signaling pathway / response to muscle inactivity / phosphatidylinositol kinase activity / negative regulation of actin filament depolymerization / regulation of actin filament organization / response to L-leucine / positive regulation of focal adhesion disassembly / response to butyrate / 1-phosphatidylinositol-3-kinase regulator activity / positive regulation of endoplasmic reticulum unfolded protein response / phosphatidylinositol 3-kinase regulator activity / IRS-mediated signalling / phosphatidylinositol 3-kinase activator activity / interleukin-18-mediated signaling pathway / T follicular helper cell differentiation / autosome genomic imprinting / phosphatidylinositol 3-kinase complex / PI3K events in ERBB4 signaling / cellular response to hydrostatic pressure / phosphatidylinositol 3-kinase regulatory subunit binding / myeloid leukocyte migration / regulation of cellular respiration / neurotrophin TRKA receptor binding / Activated NTRK2 signals through PI3K / cis-Golgi network / negative regulation of fibroblast apoptotic process / Activated NTRK3 signals through PI3K / transmembrane receptor protein tyrosine kinase adaptor activity / ErbB-3 class receptor binding / phosphatidylinositol 3-kinase complex, class IB / positive regulation of protein localization to membrane / vasculature development / 1-phosphatidylinositol-4-phosphate 3-kinase activity / Signaling by cytosolic FGFR1 fusion mutants / Co-stimulation by ICOS / RHOD GTPase cycle / cardiac muscle cell contraction / RHOF GTPase cycle / phosphatidylinositol 3-kinase complex, class IA / kinase activator activity / Nephrin family interactions / anoikis / Signaling by LTK in cancer / phosphatidylinositol-3-phosphate biosynthetic process / positive regulation of leukocyte migration / relaxation of cardiac muscle / Signaling by LTK / MET activates PI3K/AKT signaling / PI3K/AKT activation / 1-phosphatidylinositol-4,5-bisphosphate 3-kinase activity / negative regulation of stress fiber assembly / RND1 GTPase cycle / positive regulation of filopodium assembly / phosphatidylinositol-4,5-bisphosphate 3-kinase / RND2 GTPase cycle / vascular endothelial growth factor signaling pathway / RND3 GTPase cycle / phosphatidylinositol 3-kinase / insulin binding / growth hormone receptor signaling pathway / 1-phosphatidylinositol-3-kinase activity / Signaling by ALK / RHOB GTPase cycle / RHOV GTPase cycle / PI-3K cascade:FGFR3 / Erythropoietin activates Phosphoinositide-3-kinase (PI3K) / GP1b-IX-V activation signalling / negative regulation of macroautophagy / natural killer cell mediated cytotoxicity / PI-3K cascade:FGFR2 / response to dexamethasone / phosphatidylinositol-mediated signaling / PI-3K cascade:FGFR4 / PI-3K cascade:FGFR1 / RHOC GTPase cycle / RHOJ GTPase cycle / intracellular glucose homeostasis / phosphatidylinositol phosphate biosynthetic process / negative regulation of osteoclast differentiation / Synthesis of PIPs at the plasma membrane / energy homeostasis / RHOU GTPase cycle / CDC42 GTPase cycle / RET signaling / negative regulation of anoikis / PI3K events in ERBB2 signaling / insulin receptor substrate binding / Interleukin-3, Interleukin-5 and GM-CSF signaling / PI3K Cascade / T cell differentiation / protein kinase activator activity / intercalated disc / RHOG GTPase cycle / extrinsic apoptotic signaling pathway via death domain receptors / negative regulation of cell-matrix adhesion / regulation of multicellular organism growth / RHOA GTPase cycle / CD28 dependent PI3K/Akt signaling / positive regulation of TOR 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: 2.79 Å | ||||||||||||||||||||||||||||||||||||||||||
![]() | Liu, X. / Yang, S. / Hart, J.R. / Xu, Y. / Zou, X. / Zhang, H. / Zhou, Q. / Xia, T. / Zhang, Y. / Yang, D. ...Liu, X. / Yang, S. / Hart, J.R. / Xu, Y. / Zou, X. / Zhang, H. / Zhou, Q. / Xia, T. / Zhang, Y. / Yang, D. / Wang, M.-W. / Vogt, P.K. | ||||||||||||||||||||||||||||||||||||||||||
資金援助 | ![]() ![]()
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![]() | ![]() タイトル: Cryo-EM structures of PI3Kα reveal conformational changes during inhibition and activation. 著者: Xiao Liu / Su Yang / Jonathan R Hart / Yingna Xu / Xinyu Zou / Huibing Zhang / Qingtong Zhou / Tian Xia / Yan Zhang / Dehua Yang / Ming-Wei Wang / Peter K Vogt / ![]() ![]() 要旨: Phosphoinositide 3-kinases (PI3Ks) are lipid kinases essential for growth and metabolism. Their aberrant activation is associated with many types of cancers. Here we used single-particle cryoelectron ...Phosphoinositide 3-kinases (PI3Ks) are lipid kinases essential for growth and metabolism. Their aberrant activation is associated with many types of cancers. Here we used single-particle cryoelectron microscopy (cryo-EM) to determine three distinct conformations of full-length PI3Kα (p110α-p85α): the unliganded heterodimer PI3Kα, PI3Kα bound to the p110α-specific inhibitor BYL-719, and PI3Kα exposed to an activating phosphopeptide. The cryo-EM structures of unbound and of BYL-719-bound PI3Kα are in general accord with published crystal structures. Local deviations are presented and discussed. BYL-719 stabilizes the structure of PI3Kα, but three regions of low-resolution extra density remain and are provisionally assigned to the cSH2, BH, and SH3 domains of p85. One of the extra density regions is in contact with the kinase domain blocking access to the catalytic site. This conformational change indicates that the effects of BYL-719 on PI3Kα activity extend beyond competition with adenosine triphosphate (ATP). In unliganded PI3Kα, the DFG motif occurs in the "in" and "out" positions. In BYL-719-bound PI3Kα, only the DFG-in position, corresponding to the active conformation of the kinase, was observed. The phosphopeptide-bound structure of PI3Kα is composed of a stable core resolved at 3.8 Å. It contains all p110α domains except the adaptor-binding domain (ABD). The p85α domains, linked to the core through the ABD, are no longer resolved, implying that the phosphopeptide activates PI3Kα by fully releasing the niSH2 domain from binding to p110α. The structures presented here show the basal form of the full-length PI3Kα dimer and document conformational changes related to the activated and inhibited states. | ||||||||||||||||||||||||||||||||||||||||||
履歴 |
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構造の表示
ムービー |
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構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 261.5 KB | 表示 | ![]() |
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PDB形式 | ![]() | 192.1 KB | 表示 | ![]() |
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-検証レポート
文書・要旨 | ![]() | 1.1 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.1 MB | 表示 | |
XML形式データ | ![]() | 37.3 KB | 表示 | |
CIF形式データ | ![]() | 58.3 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | 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: 127822.578 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 詳細 (発現宿主): Baculovirus produces both PIK3CA and PIK3R1 simultaneously Cell (発現宿主): BTI-TN-5B1-4 / 発現宿主: ![]() 参照: UniProt: P42336, phosphatidylinositol-4,5-bisphosphate 3-kinase, non-specific serine/threonine protein kinase |
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#2: タンパク質 | 分子量: 83623.203 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 詳細 (発現宿主): Baculovirus produces both PIK3CA and PIK3R1 simultaneously Cell (発現宿主): BTI-TN-5B1-4 / 発現宿主: ![]() |
#3: 水 | ChemComp-HOH / |
-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: Heterodimer of PIK3CA with PIK3R1 / タイプ: COMPLEX / Entity ID: #1-#2 / 由来: RECOMBINANT |
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分子量 | 値: 0.2 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: 7.6 |
試料 | 濃度: 1 mg/ml / 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: GRAPHENE OXIDE / グリッドのサイズ: 300 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 |
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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: OTHER / 加速電圧: 300 kV / 照射モード: OTHER |
電子レンズ | モード: BRIGHT FIELD / 倍率(補正後): 46685 X / Calibrated defocus min: -1500 nm / 最大 デフォーカス(補正後): -2500 nm |
撮影 | 電子線照射量: 70 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 実像数: 4023 |
画像スキャン | 横: 5760 / 縦: 4092 |
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解析
ソフトウェア |
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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: 332105 | |||||||||||||||||||||||||
3次元再構成 | 解像度: 2.79 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 332105 / 対称性のタイプ: POINT | |||||||||||||||||||||||||
原子モデル構築 | B value: 98.68 / プロトコル: FLEXIBLE FIT / 空間: REAL / Target criteria: Correlation coefficient | |||||||||||||||||||||||||
原子モデル構築 | 3D fitting-ID: 1 / Source name: PDB / タイプ: experimental model
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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: 90.31 Å2 | |||||||||||||||||||||||||
拘束条件 |
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