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基本情報
登録情報 | データベース: PDB / ID: 8gua | ||||||||||||||||||||||||||||||||||||||||||
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タイトル | Cryo-EM structure of cancer-specific PI3Kalpha mutant E542K in complex with BYL-719 | ||||||||||||||||||||||||||||||||||||||||||
![]() | Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform | ||||||||||||||||||||||||||||||||||||||||||
![]() | STRUCTURAL PROTEIN / Phosphoinositide 3-kinase (PI3K) / helical domain / mutation / cancers | ||||||||||||||||||||||||||||||||||||||||||
機能・相同性 | ![]() response to muscle inactivity / negative regulation of actin filament depolymerization / regulation of actin filament organization / response to L-leucine / response to butyrate / IRS-mediated signalling / autosome genomic imprinting / phosphatidylinositol 3-kinase complex / PI3K events in ERBB4 signaling / cellular response to hydrostatic pressure ...response to muscle inactivity / negative regulation of actin filament depolymerization / regulation of actin filament organization / response to L-leucine / response to butyrate / IRS-mediated signalling / autosome genomic imprinting / phosphatidylinositol 3-kinase complex / PI3K events in ERBB4 signaling / cellular response to hydrostatic pressure / regulation of cellular respiration / Activated NTRK2 signals through PI3K / negative regulation of fibroblast apoptotic process / Activated NTRK3 signals through PI3K / 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 / cardiac muscle cell contraction / phosphatidylinositol 3-kinase complex, class IA / Nephrin family interactions / anoikis / Signaling by LTK in cancer / phosphatidylinositol-3-phosphate biosynthetic process / relaxation of cardiac muscle / Signaling by LTK / MET activates PI3K/AKT signaling / PI3K/AKT activation / 1-phosphatidylinositol-4,5-bisphosphate 3-kinase activity / phosphatidylinositol-4,5-bisphosphate 3-kinase / vascular endothelial growth factor signaling pathway / phosphatidylinositol 3-kinase / 1-phosphatidylinositol-3-kinase activity / Signaling by ALK / PI-3K cascade:FGFR3 / Erythropoietin activates Phosphoinositide-3-kinase (PI3K) / negative regulation of macroautophagy / PI-3K cascade:FGFR2 / response to dexamethasone / phosphatidylinositol-mediated signaling / PI-3K cascade:FGFR4 / PI-3K cascade:FGFR1 / phosphatidylinositol phosphate biosynthetic process / Synthesis of PIPs at the plasma membrane / energy homeostasis / 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 / protein kinase activator activity / intercalated disc / regulation of multicellular organism growth / CD28 dependent PI3K/Akt signaling / positive regulation of TOR signaling / Role of LAT2/NTAL/LAB on calcium mobilization / RAC2 GTPase cycle / Interleukin receptor SHC signaling / Role of phospholipids in phagocytosis / GAB1 signalosome / adipose tissue development / phagocytosis / endothelial cell migration / Signaling by PDGFRA transmembrane, juxtamembrane and kinase domain mutants / Signaling by PDGFRA extracellular domain mutants / Signaling by FGFR4 in disease / positive regulation of lamellipodium assembly / cardiac muscle contraction / GPVI-mediated activation cascade / Signaling by FLT3 ITD and TKD mutants / Signaling by FGFR3 in disease / Tie2 Signaling / response to muscle stretch / Signaling by FGFR2 in disease / RAC1 GTPase cycle / Signaling by FLT3 fusion proteins / FLT3 Signaling / Signaling by FGFR1 in disease / positive regulation of smooth muscle cell proliferation / Downstream signal transduction / insulin-like growth factor receptor signaling pathway / Regulation of signaling by CBL / Signaling by phosphorylated juxtamembrane, extracellular and kinase domain KIT mutants / response to activity / cellular response to glucose stimulus / phosphatidylinositol 3-kinase/protein kinase B signal transduction / liver development / Signaling by SCF-KIT / Constitutive Signaling by EGFRvIII / Signaling by ERBB2 ECD mutants / Signaling by ERBB2 KD Mutants / Signaling by CSF1 (M-CSF) in myeloid cells / platelet activation / VEGFA-VEGFR2 Pathway / epidermal growth factor receptor signaling pathway / cellular response to insulin stimulus / glucose metabolic process 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 | ||||||||||||||||||||||||||||||||||||||||||
![]() | Liu, X. / Zhou, Q. / Hart, J.R. / Xu, Y. / Yang, S. / Yang, D. / Vogt, P.K. / Wang, M.-W. | ||||||||||||||||||||||||||||||||||||||||||
資金援助 | ![]() ![]()
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![]() | ![]() タイトル: Cryo-EM structures of cancer-specific helical and kinase domain mutations of PI3Kα. 著者: Xiao Liu / Qingtong Zhou / Jonathan R Hart / Yingna Xu / Su Yang / Dehua Yang / Peter K Vogt / Ming-Wei Wang / ![]() ![]() ![]() 要旨: Phosphoinositide 3-kinases (PI3Ks) are a family of lipid kinases that perform multiple and important cellular functions. The protein investigated here belongs to class IA of the PI3Ks; it is a dimer ...Phosphoinositide 3-kinases (PI3Ks) are a family of lipid kinases that perform multiple and important cellular functions. The protein investigated here belongs to class IA of the PI3Ks; it is a dimer consisting of a catalytic subunit, p110α, and a regulatory subunit, p85α, and is referred to as PI3Kα. The catalytic subunit p110α is frequently mutated in cancer. The mutations induce a gain of function and constitute a driving force in cancer development. About 80% of these mutations lead to single-amino-acid substitutions in one of three sites of p110α: two in the helical domain of the protein (E542K and E545K) and one at the C-terminus of the kinase domain (H1047R). Here, we report the cryo-electron microscopy structures of these mutants in complex with the p110α-specific inhibitor BYL-719. The H1047R mutant rotates its sidechain to a new position and weakens the kα11 activation loop interaction, thereby reducing the inhibitory effect of p85α on p110α. E542K and E545K completely abolish the tight interaction between the helical domain of p110α and the N-terminal SH2 domain of p85α and lead to the disruption of all p85α binding and a dramatic increase in flexibility of the adaptor-binding domain (ABD) in p110α. Yet, the dimerization of PI3Kα is preserved through the ABD-p85α interaction. The local and global structural features induced by these mutations provide molecular insights into the activation of PI3Kα, deepen our understanding of the oncogenic mechanism of this important signaling molecule, and may facilitate the development of mutant-specific inhibitors. | ||||||||||||||||||||||||||||||||||||||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 173.2 KB | 表示 | ![]() |
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PDB形式 | ![]() | 129.9 KB | 表示 | ![]() |
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その他 | ![]() |
-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 | ![]() | 39.6 KB | 表示 | |
CIF形式データ | ![]() | 58.5 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 | ![]() 34271MC ![]() 8gubC ![]() 8gudC M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 ( |
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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: 127822.641 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() 参照: UniProt: P42336, phosphatidylinositol 3-kinase, phosphatidylinositol-4,5-bisphosphate 3-kinase, non-specific serine/threonine protein kinase |
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#2: 化合物 | ChemComp-1LT / ( |
研究の焦点であるリガンドがあるか | 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: Human PI3Kalpha mutant E542K in complex with BYL-719 タイプ: COMPLEX / Entity ID: #1 / 由来: RECOMBINANT |
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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 |
急速凍結 | 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 / 最大 デフォーカス(公称値): 2500 nm / 最小 デフォーカス(公称値): 1500 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: 5911 |
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解析
ソフトウェア | 名称: PHENIX / バージョン: 1.19.1_4122: / 分類: 精密化 | ||||||||||||||||||||||||
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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 | ||||||||||||||||||||||||
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: 407119 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
原子モデル構築 | B value: 95 / プロトコル: FLEXIBLE FIT / 空間: REAL / Target criteria: Correlation coefficient | ||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 7MYN Accession code: 7MYN / Source name: PDB / タイプ: experimental model | ||||||||||||||||||||||||
拘束条件 |
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