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基本情報
登録情報 | データベース: PDB / ID: 8vjc | ||||||
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タイトル | Cryo-EM structure of short form insulin receptor (IR-A) with three IGF2 bound, asymmetric conformation. | ||||||
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![]() | SIGNALING PROTEIN / Insulin receptor / IGF2 / RTK | ||||||
機能・相同性 | ![]() 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 organ growth / positive regulation of meiotic cell cycle ...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 organ growth / positive regulation of meiotic cell cycle / insulin-like growth factor II binding / positive regulation of developmental growth / male sex determination / insulin receptor complex / transmembrane receptor protein tyrosine kinase activator activity / insulin-like growth factor I binding / positive regulation of multicellular organism growth / exocrine pancreas development / positive regulation of protein-containing complex disassembly / dendritic spine maintenance / positive regulation of vascular endothelial cell proliferation / cargo receptor activity / insulin binding / neuronal cell body membrane / adrenal gland development / PTB domain binding / Signaling by Insulin receptor / IRS activation / positive regulation of activated T cell proliferation / positive regulation of respiratory burst / amyloid-beta clearance / regulation of embryonic development / positive regulation of cell division / positive regulation of receptor internalization / protein kinase activator activity / insulin receptor substrate binding / epidermis development / positive regulation of glycogen biosynthetic process / Signal attenuation / embryonic placenta development / SHC-related events triggered by IGF1R / phosphatidylinositol 3-kinase binding / positive regulation of insulin receptor signaling pathway / transport across blood-brain barrier / heart morphogenesis / activation of protein kinase B activity / Insulin receptor recycling / insulin-like growth factor receptor binding / striated muscle cell differentiation / dendrite membrane / neuron projection maintenance / positive regulation of MAP kinase activity / positive regulation of mitotic nuclear division / Insulin receptor signalling cascade / receptor-mediated endocytosis / insulin-like growth factor receptor signaling pathway / protein serine/threonine kinase activator activity / platelet alpha granule lumen / positive regulation of glycolytic process / learning / animal organ morphogenesis / positive regulation of D-glucose import / insulin receptor binding / growth factor activity / placental growth factor receptor activity / insulin receptor activity / vascular endothelial growth factor receptor activity / hepatocyte growth factor receptor activity / macrophage colony-stimulating factor receptor activity / platelet-derived growth factor alpha-receptor activity / platelet-derived growth factor beta-receptor activity / stem cell factor receptor activity / boss receptor activity / protein tyrosine kinase collagen receptor activity / brain-derived neurotrophic factor receptor activity / transmembrane-ephrin receptor activity / GPI-linked ephrin receptor activity / epidermal growth factor receptor activity / fibroblast growth factor receptor activity / insulin-like growth factor receptor activity / receptor protein-tyrosine kinase / peptidyl-tyrosine phosphorylation / hormone activity / caveola / receptor internalization / memory / cellular response to insulin stimulus / glucose metabolic process / Regulation of Insulin-like Growth Factor (IGF) transport and uptake by Insulin-like Growth Factor Binding Proteins (IGFBPs) / male gonad development / osteoblast differentiation / positive regulation of nitric oxide biosynthetic process / integrin binding / late endosome / insulin receptor signaling pathway / glucose homeostasis / Platelet degranulation / amyloid-beta binding / positive regulation of protein phosphorylation / PI5P, PP2A and IER3 Regulate PI3K/AKT Signaling 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: 3.8 Å | ||||||
![]() | An, W. / Hall, C. / Li, J. / Huang, A. / Wu, J. / Park, J. / Bai, X.C. / Choi, E. | ||||||
資金援助 | ![]()
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![]() | ![]() 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. | ||||||
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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 | ![]() | 375.7 KB | 表示 | ![]() |
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PDB形式 | ![]() | 284.5 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
関連構造データ | ![]() 43280MC ![]() 8u4bC ![]() 8u4cC ![]() 8u4eC ![]() 8vjbC C: 同じ文献を引用 ( M: このデータのモデリングに利用したマップデータ |
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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: 155329.094 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() #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) ![]() ![]() ![]() Has protein modification | Y | |
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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 |
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試料調製
構成要素 | 名称: Short form insulin receptor (IR-A) 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: ![]() |
由来(組換発現) | 生物種: ![]() |
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 |
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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 / 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 |
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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 | ||||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 3422813 | ||||||||||||||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.8 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 79813 / 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 |