+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 8u4e | ||||||
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タイトル | Cryo-EM structure of long form insulin receptor (IR-B) with three IGF2 bound, asymmetric conformation. | ||||||
要素 |
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キーワード | SIGNALING PROTEIN / Insulin receptor / IGF2 / RTK | ||||||
機能・相同性 | 機能・相同性情報 spongiotrophoblast cell proliferation / negative regulation of muscle cell differentiation / positive regulation of skeletal muscle tissue growth / embryonic placenta morphogenesis / regulation of muscle cell differentiation / Signaling by Type 1 Insulin-like Growth Factor 1 Receptor (IGF1R) / IRS-related events triggered by IGF1R / genomic imprinting / regulation of female gonad development / positive regulation of meiotic cell cycle ...spongiotrophoblast cell proliferation / negative regulation of muscle cell differentiation / positive regulation of skeletal muscle tissue growth / embryonic placenta morphogenesis / regulation of muscle cell differentiation / Signaling by Type 1 Insulin-like Growth Factor 1 Receptor (IGF1R) / IRS-related events triggered by IGF1R / genomic imprinting / regulation of female gonad development / positive regulation of meiotic cell cycle / positive regulation of organ growth / insulin-like growth factor II binding / positive regulation of developmental growth / male sex determination / exocrine pancreas development / insulin receptor complex / insulin-like growth factor I binding / insulin receptor activity / positive regulation of multicellular organism growth / positive regulation of protein-containing complex disassembly / cargo receptor activity / positive regulation of vascular endothelial cell proliferation / dendritic spine maintenance / insulin binding / PTB domain binding / adrenal gland development / activation of protein kinase activity / Signaling by Insulin receptor / IRS activation / transmembrane receptor protein tyrosine kinase activator activity / neuronal cell body membrane / positive regulation of activated T cell proliferation / positive regulation of respiratory burst / positive regulation of receptor internalization / positive regulation of cell division / amyloid-beta clearance / regulation of embryonic development / insulin receptor substrate binding / transport across blood-brain barrier / positive regulation of glycogen biosynthetic process / epidermis development / embryonic placenta development / SHC-related events triggered by IGF1R / Signal attenuation / phosphatidylinositol 3-kinase binding / heart morphogenesis / positive regulation of insulin receptor signaling pathway / Insulin receptor recycling / striated muscle cell differentiation / insulin-like growth factor receptor binding / dendrite membrane / neuron projection maintenance / activation of protein kinase B activity / positive regulation of glycolytic process / Insulin receptor signalling cascade / positive regulation of mitotic nuclear division / receptor-mediated endocytosis / protein serine/threonine kinase activator activity / insulin-like growth factor receptor signaling pathway / platelet alpha granule lumen / learning / positive regulation of D-glucose import / animal organ morphogenesis / insulin receptor binding / growth factor activity / positive regulation of MAP kinase activity / receptor protein-tyrosine kinase / caveola / cellular response to growth factor stimulus / receptor internalization / hormone activity / memory / peptidyl-tyrosine phosphorylation / cellular response to insulin stimulus / osteoblast differentiation / Regulation of Insulin-like Growth Factor (IGF) transport and uptake by Insulin-like Growth Factor Binding Proteins (IGFBPs) / male gonad development / glucose metabolic process / positive regulation of nitric oxide biosynthetic process / late endosome / integrin binding / Platelet degranulation / insulin receptor signaling pathway / glucose homeostasis / amyloid-beta binding / PI5P, PP2A and IER3 Regulate PI3K/AKT Signaling / protein tyrosine kinase activity / in utero embryonic development / protein autophosphorylation / positive regulation of MAPK cascade / lysosome / positive regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction / receptor complex / endosome membrane / receptor ligand activity / positive regulation of cell migration / symbiont entry into host cell / positive regulation of protein phosphorylation / G protein-coupled receptor signaling pathway / protein phosphorylation 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: 4.2 Å | ||||||
データ登録者 | An, W. / Hall, C. / Li, J. / Huang, A. / Wu, J. / Park, J. / Bai, X.C. / Choi, E. | ||||||
資金援助 | 米国, 1件
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引用 | ジャーナル: Nat Commun / 年: 2024 タイトル: Activation of the insulin receptor by insulin-like growth factor 2. 著者: Weidong An / Catherine Hall / Jie Li / Albert Hung / Jiayi Wu / Junhee Park / Liwei Wang / Xiao-Chen Bai / Eunhee Choi / 要旨: Insulin receptor (IR) controls growth and metabolism. Insulin-like growth factor 2 (IGF2) has different binding properties on two IR isoforms, mimicking insulin's function. However, the molecular ...Insulin receptor (IR) controls growth and metabolism. Insulin-like growth factor 2 (IGF2) has different binding properties on two IR isoforms, mimicking insulin's function. However, the molecular mechanism underlying IGF2-induced IR activation remains unclear. Here, we present cryo-EM structures of full-length human long isoform IR (IR-B) in both the inactive and IGF2-bound active states, and short isoform IR (IR-A) in the IGF2-bound active state. Under saturated IGF2 concentrations, both the IR-A and IR-B adopt predominantly asymmetric conformations with two or three IGF2s bound at site-1 and site-2, which differs from that insulin saturated IR forms an exclusively T-shaped symmetric conformation. IGF2 exhibits a relatively weak binding to IR site-2 compared to insulin, making it less potent in promoting full IR activation. Cell-based experiments validated the functional importance of IGF2 binding to two distinct binding sites in optimal IR signaling and trafficking. In the inactive state, the C-terminus of α-CT of IR-B contacts FnIII-2 domain of the same protomer, hindering its threading into the C-loop of IGF2, thus reducing the association rate of IGF2 with IR-B. Collectively, our studies demonstrate the activation mechanism of IR by IGF2 and reveal the molecular basis underlying the different affinity of IGF2 to IR-A and IR-B. | ||||||
履歴 |
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-構造の表示
構造ビューア | 分子: MolmilJmol/JSmol |
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-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 8u4e.cif.gz | 376 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb8u4e.ent.gz | 286.2 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 8u4e.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
文書・要旨 | 8u4e_validation.pdf.gz | 1.2 MB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 8u4e_full_validation.pdf.gz | 1.3 MB | 表示 | |
XML形式データ | 8u4e_validation.xml.gz | 62.5 KB | 表示 | |
CIF形式データ | 8u4e_validation.cif.gz | 91.1 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/u4/8u4e ftp://data.pdbj.org/pub/pdb/validation_reports/u4/8u4e | HTTPS FTP |
-関連構造データ
関連構造データ | 41880MC 8u4bC 8u4cC 8vjbC 8vjcC 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 (文献) |
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類似構造データ | 類似検索 - 機能・相同性F&H 検索 |
-リンク
-集合体
登録構造単位 |
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1 |
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-要素
#1: タンパク質 | 分子量: 156518.328 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: INSR / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P06213 #2: タンパク質 | 分子量: 20170.398 Da / 分子数: 3 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: IGF2 / 発現宿主: Escherichia coli (大腸菌) / 参照: UniProt: P01344 |
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-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 |
-試料調製
構成要素 | 名称: Long form insulin receptor (IR-B) with three IGF2 bound, asymmetric conformation. タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT |
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分子量 | 実験値: NO |
由来(天然) | 生物種: Homo sapiens (ヒト) |
由来(組換発現) | 生物種: Homo sapiens (ヒト) |
緩衝液 | pH: 7.5 |
試料 | 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 |
-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: BRIGHT FIELD / 最大 デフォーカス(公称値): 2600 nm / 最小 デフォーカス(公称値): 1600 nm / アライメント法: COMA FREE |
試料ホルダ | 凍結剤: NITROGEN 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER |
撮影 | 電子線照射量: 60 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) |
電子光学装置 | エネルギーフィルター名称: GIF Bioquantum / エネルギーフィルタースリット幅: 20 eV |
-解析
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: 3962294 | ||||||||||||||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 4.2 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 119411 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||
原子モデル構築 | プロトコル: RIGID BODY FIT / 空間: REAL |