+
データを開く
-
基本情報
| 登録情報 | データベース: PDB / ID: 8u4c | ||||||
|---|---|---|---|---|---|---|---|
| タイトル | Cryo-EM structure of long form insulin receptor (IR-B) with four IGF2 bound, symmetric conformation. | ||||||
要素 |
| ||||||
キーワード | SIGNALING PROTEIN / Insulin receptor / IGF2 / RTK | ||||||
| 機能・相同性 | 機能・相同性情報embryonic placenta morphogenesis / positive regulation of skeletal muscle tissue growth / negative regulation of muscle cell differentiation / regulation of muscle cell differentiation / Signaling by Type 1 Insulin-like Growth Factor 1 Receptor (IGF1R) / IRS-related events triggered by IGF1R / regulation of female gonad development / positive regulation of organ growth / positive regulation of meiotic cell cycle / insulin-like growth factor II binding ...embryonic placenta morphogenesis / positive regulation of skeletal muscle tissue growth / negative regulation of muscle cell differentiation / regulation of muscle cell differentiation / Signaling by Type 1 Insulin-like Growth Factor 1 Receptor (IGF1R) / IRS-related events triggered by IGF1R / 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 / genomic imprinting / transmembrane receptor protein tyrosine kinase activator activity / insulin receptor complex / insulin-like growth factor I binding / positive regulation of protein-containing complex disassembly / insulin receptor activity / positive regulation of multicellular organism growth / exocrine pancreas development / dendritic spine maintenance / positive regulation of vascular endothelial cell proliferation / cargo receptor activity / insulin binding / adrenal gland development / neuronal cell body membrane / PTB domain binding / Signaling by Insulin receptor / IRS activation / positive regulation of activated T cell proliferation / positive regulation of respiratory burst / amyloid-beta clearance / positive regulation of cell division / positive regulation of receptor internalization / regulation of embryonic development / insulin receptor substrate binding / protein kinase activator activity / epidermis development / positive regulation of insulin receptor signaling pathway / positive regulation of glycogen biosynthetic process / Signal attenuation / embryonic placenta development / SHC-related events triggered by IGF1R / heart morphogenesis / transport across blood-brain barrier / phosphatidylinositol 3-kinase binding / Insulin receptor recycling / insulin-like growth factor receptor binding / striated muscle cell differentiation / dendrite membrane / neuron projection maintenance / positive regulation of mitotic nuclear division / Insulin receptor signalling cascade / insulin-like growth factor receptor signaling pathway / receptor-mediated endocytosis / platelet alpha granule lumen / positive regulation of glycolytic process / animal organ morphogenesis / protein serine/threonine kinase activator activity / positive regulation of D-glucose import / learning / insulin receptor binding / growth factor activity / receptor protein-tyrosine kinase / hormone activity / caveola / cellular response to growth factor stimulus / receptor internalization / memory / male gonad development / integrin binding / glucose metabolic process / Regulation of Insulin-like Growth Factor (IGF) transport and uptake by Insulin-like Growth Factor Binding Proteins (IGFBPs) / cellular response to insulin stimulus / positive regulation of nitric oxide biosynthetic process / osteoblast differentiation / insulin receptor signaling pathway / late endosome / Platelet degranulation / glucose homeostasis / amyloid-beta binding / protein autophosphorylation / PI5P, PP2A and IER3 Regulate PI3K/AKT Signaling / protein tyrosine kinase activity / in utero embryonic development / lysosome / positive regulation of canonical NF-kappaB signal transduction / positive regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction / receptor complex / endosome membrane / positive regulation of MAPK cascade / positive regulation of cell migration / G protein-coupled receptor signaling pathway / receptor ligand activity / protein domain specific binding / axon / external side of plasma membrane / positive regulation of cell population proliferation / regulation of DNA-templated transcription / symbiont entry into host cell 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: 3.6 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
| ||||||
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 |
|
-
構造の表示
| 構造ビューア | 分子: Molmil Jmol/JSmol |
|---|
-
ダウンロードとリンク
-
ダウンロード
| PDBx/mmCIF形式 | 8u4c.cif.gz | 393.9 KB | 表示 | PDBx/mmCIF形式 |
|---|---|---|---|---|
| PDB形式 | pdb8u4c.ent.gz | 299.9 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 8u4c.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 | 8u4c_validation.pdf.gz | 1.1 MB | 表示 | wwPDB検証レポート |
|---|---|---|---|---|
| 文書・詳細版 | 8u4c_full_validation.pdf.gz | 1.2 MB | 表示 | |
| XML形式データ | 8u4c_validation.xml.gz | 61.1 KB | 表示 | |
| CIF形式データ | 8u4c_validation.cif.gz | 90 KB | 表示 | |
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/u4/8u4c ftp://data.pdbj.org/pub/pdb/validation_reports/u4/8u4c | HTTPS FTP |
-関連構造データ
| 関連構造データ | ![]() 41878MC ![]() 8u4bC ![]() 8u4eC ![]() 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 ( |
|---|---|
| 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 | ![]()
|
|---|---|
| 1 |
|
-
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: 4 / 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: ![]() Has protein modification | Y | |
|---|
-実験情報
-実験
| 実験 | 手法: 電子顕微鏡法 |
|---|---|
| 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 four IGF2 bound, symmetric conformation. タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT |
|---|---|
| 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 |
|---|---|
| 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 |
| ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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: C2 (2回回転対称) | ||||||||||||||||||||||||||||||
| 3次元再構成 | 解像度: 3.6 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 74973 / 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 |
ムービー
コントローラー
万見について




Homo sapiens (ヒト)
米国, 1件
引用








PDBj














FIELD EMISSION GUN