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基本情報
| 登録情報 | データベース: PDB / ID: 8w9b | ||||||
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| タイトル | CryoEM structure of human PI3K-alpha (P85/P110-H1047R) with QR-8557 binding at an allosteric site | ||||||
要素 |
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キーワード | ONCOPROTEIN / PI3K-alpha / lipid kinase / allosteric inhibition | ||||||
| 機能・相同性 | 機能・相同性情報perinuclear endoplasmic reticulum membrane / response to muscle inactivity / regulation of toll-like receptor 4 signaling pathway / phosphatidylinositol kinase activity / regulation of actin filament organization / negative regulation of actin filament depolymerization / response to butyrate / phosphatidylinositol 3-kinase regulator activity / 1-phosphatidylinositol-3-kinase regulator activity / positive regulation of endoplasmic reticulum unfolded protein response ...perinuclear endoplasmic reticulum membrane / response to muscle inactivity / regulation of toll-like receptor 4 signaling pathway / phosphatidylinositol kinase activity / regulation of actin filament organization / negative regulation of actin filament depolymerization / response to butyrate / phosphatidylinositol 3-kinase regulator activity / 1-phosphatidylinositol-3-kinase regulator activity / positive regulation of endoplasmic reticulum unfolded protein response / IRS-mediated signalling / response to L-leucine / phosphatidylinositol 3-kinase activator activity / T follicular helper cell differentiation / interleukin-18-mediated signaling pathway / PI3K events in ERBB4 signaling / phosphatidylinositol 3-kinase regulatory subunit binding / myeloid leukocyte migration / cellular response to hydrostatic pressure / neurotrophin TRKA receptor binding / positive regulation of focal adhesion disassembly / autosome genomic imprinting / Activated NTRK2 signals through PI3K / cis-Golgi network / negative regulation of fibroblast apoptotic process / Activated NTRK3 signals through PI3K / phosphatidylinositol 3-kinase complex, class IB / ErbB-3 class receptor binding / phosphatidylinositol 3-kinase complex / transmembrane receptor protein tyrosine kinase adaptor activity / negative regulation of stress fiber assembly / TORC2 signaling / Co-stimulation by ICOS / Signaling by cytosolic FGFR1 fusion mutants / positive regulation of protein localization to membrane / vasculature development / RHOD GTPase cycle / regulation of cellular respiration / Nephrin family interactions / RHOF GTPase cycle / Signaling by LTK in cancer / 1-phosphatidylinositol-4-phosphate 3-kinase activity / Signaling by LTK / anoikis / kinase activator activity / relaxation of cardiac muscle / positive regulation of leukocyte migration / RND1 GTPase cycle / phosphatidylinositol 3-kinase complex, class IA / RND2 GTPase cycle / PI3K/AKT activation / MET activates PI3K/AKT signaling / positive regulation of filopodium assembly / phosphatidylinositol-4,5-bisphosphate 3-kinase / RND3 GTPase cycle / 1-phosphatidylinositol-4,5-bisphosphate 3-kinase activity / phosphatidylinositol 3-kinase / growth hormone receptor signaling pathway / insulin binding / phosphatidylinositol-3-phosphate biosynthetic process / Signaling by ALK / cardiac muscle cell contraction / 1-phosphatidylinositol-3-kinase activity / RHOV GTPase cycle / vascular endothelial growth factor signaling pathway / Erythropoietin activates Phosphoinositide-3-kinase (PI3K) / RHOB GTPase cycle / PI-3K cascade:FGFR3 / natural killer cell mediated cytotoxicity / GP1b-IX-V activation signalling / response to dexamethasone / negative regulation of macroautophagy / PI-3K cascade:FGFR2 / PI-3K cascade:FGFR4 / PI-3K cascade:FGFR1 / RHOC GTPase cycle / RHOJ GTPase cycle / negative regulation of osteoclast differentiation / phosphatidylinositol phosphate biosynthetic process / phosphatidylinositol-mediated signaling / 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 / T cell differentiation / PI3K events in ERBB2 signaling / PI3K Cascade / RHOG GTPase cycle / intercalated disc / negative regulation of cell-matrix adhesion / extrinsic apoptotic signaling pathway via death domain receptors / regulation of multicellular organism growth / Role of LAT2/NTAL/LAB on calcium mobilization / CD28 dependent PI3K/Akt signaling / 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 Å | ||||||
データ登録者 | Huang, X. / Ren, X. / Zhong, W. | ||||||
| 資金援助 | 1件
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引用 | ジャーナル: Structure / 年: 2024タイトル: Cryo-EM structures reveal two allosteric inhibition modes of PI3Kα involving a re-shaping of the activation loop. 著者: Xiuliang Huang / Kailiang Wang / Jing Han / Xiumei Chen / Zhenglin Wang / Tianlun Wu / Bo Yu / Feng Zhao / Xinjuan Wang / Huijuan Li / Zhi Xie / Xiaotian Zhu / Wenge Zhong / Xiaoming Ren / ![]() 要旨: PI3Kα is a lipid kinase that phosphorylates PIP2 and generates PIP3. The hyperactive PI3Kα mutation, H1047R, accounts for about 14% of breast cancer, making it a highly attractive target for drug ...PI3Kα is a lipid kinase that phosphorylates PIP2 and generates PIP3. The hyperactive PI3Kα mutation, H1047R, accounts for about 14% of breast cancer, making it a highly attractive target for drug discovery. Here, we report the cryo-EM structures of PI3Kα bound to two different allosteric inhibitors QR-7909 and QR-8557 at a global resolution of 2.7 Å and 3.0 Å, respectively. The structures reveal two distinct binding pockets on the opposite sides of the activation loop. Structural and MD simulation analyses show that the allosteric binding of QR-7909 and QR-8557 inhibit PI3Kα hyper-activity by reducing the fluctuation and mobility of the activation loop. Our work provides a strong rational basis for a further optimization and development of highly selective drug candidates to treat PI3Kα-driven cancers. | ||||||
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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 | 8w9b.cif.gz | 239.8 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb8w9b.ent.gz | 187.5 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 8w9b.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/w9/8w9b ftp://data.pdbj.org/pub/pdb/validation_reports/w9/8w9b | HTTPS FTP |
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-関連構造データ
| 関連構造データ | ![]() 37363MC ![]() 8w9aC 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: 124230.750 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: 33666.961 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-UJ3 / 分子量: 395.427 Da / 分子数: 1 / 由来タイプ: 合成 / 式: C22H22FN3O3 / タイプ: SUBJECT OF INVESTIGATION |
| 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 PI3K-alpha (P85/P110-H1047R) with QR-8557 binding at an allosteric site 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) |
| 緩衝液 | pH: 8 |
| 試料 | 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: GOLD / グリッドのサイズ: 400 divisions/in. / グリッドのタイプ: Quantifoil R1.2/1.3 |
| 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: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: FLOOD BEAM |
| 電子レンズ | モード: DIFFRACTION / 最大 デフォーカス(公称値): 1500 nm / 最小 デフォーカス(公称値): 1000 nm |
| 撮影 | 電子線照射量: 48.5 e/Å2 フィルム・検出器のモデル: FEI FALCON IV (4k x 4k) |
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解析
| EMソフトウェア | 名称: PHENIX / バージョン: 1.13_2998: / カテゴリ: モデル精密化 |
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| CTF補正 | タイプ: NONE |
| 3次元再構成 | 解像度: 3 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 326253 / 対称性のタイプ: POINT |
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万見について




Homo sapiens (ヒト)
引用




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Trichoplusia ni (イラクサキンウワバ)
FIELD EMISSION GUN