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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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機能・相同性 | ![]() perinuclear endoplasmic reticulum membrane / response to muscle inactivity / negative regulation of actin filament depolymerization / regulation of toll-like receptor 4 signaling pathway / response to L-leucine / phosphatidylinositol kinase activity / regulation of actin filament organization / phosphatidylinositol 3-kinase regulator activity / response to butyrate / positive regulation of focal adhesion disassembly ...perinuclear endoplasmic reticulum membrane / response to muscle inactivity / negative regulation of actin filament depolymerization / regulation of toll-like receptor 4 signaling pathway / response to L-leucine / phosphatidylinositol kinase activity / regulation of actin filament organization / phosphatidylinositol 3-kinase regulator activity / response to butyrate / positive regulation of focal adhesion disassembly / autosome genomic imprinting / IRS-mediated signalling / cellular response to hydrostatic pressure / phosphatidylinositol 3-kinase activator activity / interleukin-18-mediated signaling pathway / PI3K events in ERBB4 signaling / myeloid leukocyte migration / 1-phosphatidylinositol-3-kinase regulator activity / phosphatidylinositol 3-kinase regulatory subunit binding / neurotrophin TRKA receptor binding / Activated NTRK2 signals through PI3K / positive regulation of protein localization to membrane / cis-Golgi network / Activated NTRK3 signals through PI3K / ErbB-3 class receptor binding / negative regulation of fibroblast apoptotic process / RHOF GTPase cycle / kinase activator activity / cardiac muscle cell contraction / phosphatidylinositol 3-kinase complex, class IB / vasculature development / ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() 類似検索 - 分子機能 | ||||||||||||||||||||||||||||||||||||||||||
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手法 | ![]() ![]() ![]() | ||||||||||||||||||||||||||||||||||||||||||
![]() | 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. | ||||||||||||||||||||||||||||||||||||||||||
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構造の表示
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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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-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, ![]() ![]() |
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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: ![]() |
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EM実験 | 試料の集合状態: PARTICLE / 3次元再構成法: ![]() |
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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![]() ![]() |
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![]() |
電子レンズ | モード: BRIGHT FIELD![]() |
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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