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データを開く
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基本情報
| 登録情報 | データベース: PDB / ID: 8ils | |||||||||||||||||||||||||||||||||||||||
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| タイトル | Cryo-EM structure of PI3Kalpha in complex with compound 17 | |||||||||||||||||||||||||||||||||||||||
要素 |
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キーワード | STRUCTURAL PROTEIN / Phosphoinositide 3-kinase / drug target / ligand / binding pocket / chemical scaffold | |||||||||||||||||||||||||||||||||||||||
| 機能・相同性 | 機能・相同性情報perinuclear endoplasmic reticulum membrane / regulation of toll-like receptor 4 signaling pathway / response to muscle inactivity / phosphatidylinositol kinase activity / regulation of actin filament organization / negative regulation of actin filament depolymerization / positive regulation of focal adhesion disassembly / response to butyrate / response to L-leucine / 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 / regulation of actin filament organization / negative regulation of actin filament depolymerization / positive regulation of focal adhesion disassembly / response to butyrate / response to L-leucine / 1-phosphatidylinositol-3-kinase regulator activity / phosphatidylinositol 3-kinase regulator activity / IRS-mediated signalling / positive regulation of endoplasmic reticulum unfolded protein response / phosphatidylinositol 3-kinase activator activity / interleukin-18-mediated signaling pathway / T follicular helper cell differentiation / phosphatidylinositol 3-kinase complex / PI3K events in ERBB4 signaling / phosphatidylinositol 3-kinase regulatory subunit binding / autosome genomic imprinting / cellular response to hydrostatic pressure / myeloid leukocyte migration / neurotrophin TRKA receptor binding / Activated NTRK2 signals through PI3K / regulation of cellular respiration / cis-Golgi network / negative regulation of fibroblast apoptotic process / transmembrane receptor protein tyrosine kinase adaptor activity / Activated NTRK3 signals through PI3K / phosphatidylinositol 3-kinase complex, class IB / ErbB-3 class receptor binding / vasculature development / positive regulation of protein localization to membrane / 1-phosphatidylinositol-4-phosphate 3-kinase activity / Signaling by cytosolic FGFR1 fusion mutants / Co-stimulation by ICOS / RHOD GTPase cycle / cardiac muscle cell contraction / phosphatidylinositol 3-kinase complex, class IA / Nephrin family interactions / RHOF GTPase cycle / Signaling by LTK in cancer / anoikis / kinase activator activity / phosphatidylinositol-3-phosphate biosynthetic process / Signaling by LTK / positive regulation of leukocyte migration / MET activates PI3K/AKT signaling / relaxation of cardiac muscle / PI3K/AKT activation / 1-phosphatidylinositol-4,5-bisphosphate 3-kinase activity / RND1 GTPase cycle / RND2 GTPase cycle / phosphatidylinositol-4,5-bisphosphate 3-kinase / negative regulation of stress fiber assembly / RND3 GTPase cycle / positive regulation of filopodium assembly / vascular endothelial growth factor signaling pathway / phosphatidylinositol 3-kinase / growth hormone receptor signaling pathway / insulin binding / Signaling by ALK / 1-phosphatidylinositol-3-kinase activity / RHOV GTPase cycle / Erythropoietin activates Phosphoinositide-3-kinase (PI3K) / RHOB GTPase cycle / PI-3K cascade:FGFR3 / natural killer cell mediated cytotoxicity / GP1b-IX-V activation signalling / negative regulation of macroautophagy / response to dexamethasone / PI-3K cascade:FGFR2 / 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 / RHOU GTPase cycle / CDC42 GTPase cycle / RET signaling / negative regulation of anoikis / insulin receptor substrate binding / Interleukin-3, Interleukin-5 and GM-CSF signaling / PI3K events in ERBB2 signaling / intercalated disc / PI3K Cascade / T cell differentiation / negative regulation of cell-matrix adhesion / RHOG GTPase cycle / extrinsic apoptotic signaling pathway via death domain receptors / regulation of multicellular organism growth / CD28 dependent PI3K/Akt signaling / Role of LAT2/NTAL/LAB on calcium mobilization / RHOA GTPase cycle / RAC2 GTPase cycle / RAC3 GTPase cycle 類似検索 - 分子機能 | |||||||||||||||||||||||||||||||||||||||
| 生物種 | Homo sapiens (ヒト) | |||||||||||||||||||||||||||||||||||||||
| 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: 3.1 Å | |||||||||||||||||||||||||||||||||||||||
データ登録者 | Zhou, Q. / Liu, X. / Neri, D. / Li, W. / Favalli, N. / Bassi, G. / Yang, S. / Yang, D. / Vogt, P.K. / Wang, M.-W. | |||||||||||||||||||||||||||||||||||||||
| 資金援助 | 中国, 米国, 12件
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引用 | ジャーナル: Proc Natl Acad Sci U S A / 年: 2023タイトル: Structural insights into the interaction of three Y-shaped ligands with PI3Kα. 著者: Qingtong Zhou / Xiao Liu / Dario Neri / Wenxin Li / Nicholas Favalli / Gabriele Bassi / Su Yang / Dehua Yang / Peter K Vogt / Ming-Wei Wang / ![]() 要旨: Class IA phosphoinositide 3-kinase alpha (PI3Kα) is an important drug target because it is one of the most frequently mutated proteins in human cancers. However, small molecule inhibitors currently ...Class IA phosphoinositide 3-kinase alpha (PI3Kα) is an important drug target because it is one of the most frequently mutated proteins in human cancers. However, small molecule inhibitors currently on the market or under development have safety concerns due to a lack of selectivity. Therefore, other chemical scaffolds or unique mechanisms of catalytic kinase inhibition are needed. Here, we report the cryo-electron microscopy structures of wild-type PI3Kα, the dimer of p110α and p85α, in complex with three Y-shaped ligands [cpd16 (compound 16), cpd17 (compound 17), and cpd18 (compound 18)] of different affinities and no inhibitory effect on the kinase activity. Unlike ATP-competitive inhibitors, cpd17 adopts a Y-shaped conformation with one arm inserted into a binding pocket formed by R770 and W780 and the other arm lodged in the ATP-binding pocket at an angle that is different from that of the ATP phosphate tail. Such a special interaction induces a conformation of PI3Kα resembling that of the unliganded protein. These observations were confirmed with two isomers (cpd16 and cpd18). Further analysis of these Y-shaped ligands revealed the structural basis of differential binding affinities caused by stereo- or regiochemical modifications. Our results may offer a different direction toward the design of therapeutic agents against PI3Kα. | |||||||||||||||||||||||||||||||||||||||
| 履歴 |
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構造の表示
| 構造ビューア | 分子: Molmil Jmol/JSmol |
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ダウンロードとリンク
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ダウンロード
| PDBx/mmCIF形式 | 8ils.cif.gz | 253.3 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb8ils.ent.gz | 192.6 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 8ils.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
| その他 | その他のダウンロード |
-検証レポート
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/il/8ils ftp://data.pdbj.org/pub/pdb/validation_reports/il/8ils | HTTPS FTP |
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-関連構造データ
| 関連構造データ | ![]() 35545MC ![]() 8ilrC ![]() 8ilvC 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 F&H 検索 |
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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) Homo sapiens (ヒト) / 遺伝子: PIK3CA / 発現宿主: Trichoplusia ni (イラクサキンウワバ)参照: UniProt: P42336, phosphatidylinositol 3-kinase, 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) Homo sapiens (ヒト) / 遺伝子: PIK3R1, GRB1 / 発現宿主: Trichoplusia ni (イラクサキンウワバ) / 参照: UniProt: P27986 |
| #3: 化合物 | ChemComp-7U5 / |
| #4: 水 | ChemComp-HOH / |
| 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 in complex with compound 17 / タイプ: COMPLEX / Entity ID: #1-#2 / 由来: MULTIPLE SOURCES |
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| 由来(天然) | 生物種: Homo sapiens (ヒト) |
| 由来(組換発現) | 生物種: Trichoplusia ni (イラクサキンウワバ) / 株: Sf-9 |
| 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) |
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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 | ||||||||||||
| 3次元再構成 | 解像度: 3.1 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 536916 / 対称性のタイプ: POINT | ||||||||||||
| 原子モデル構築 | プロトコル: FLEXIBLE FIT / 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 |
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万見について




Homo sapiens (ヒト)
中国,
米国, 12件
引用






PDBj



















gel filtration
Trichoplusia ni (イラクサキンウワバ)



