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基本情報
登録情報 | データベース: PDB / ID: 9jf9 | ||||||
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タイトル | Human insulin receptor bound with A62-dimer, Pseudo-arrowhead conformation | ||||||
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![]() | MEMBRANE PROTEIN / signaling / aptamer / receptor tyrosine kinase / agonist | ||||||
機能・相同性 | ![]() regulation of female gonad development / positive regulation of meiotic cell cycle / insulin-like growth factor II binding / positive regulation of developmental growth / insulin receptor complex / male sex determination / positive regulation of protein-containing complex disassembly / insulin-like growth factor I binding / exocrine pancreas development / dendritic spine maintenance ...regulation of female gonad development / positive regulation of meiotic cell cycle / insulin-like growth factor II binding / positive regulation of developmental growth / insulin receptor complex / male sex determination / positive regulation of protein-containing complex disassembly / insulin-like growth factor I binding / exocrine pancreas development / dendritic spine maintenance / cargo receptor activity / insulin binding / adrenal gland development / neuronal cell body membrane / PTB domain binding / Signaling by Insulin receptor / IRS activation / positive regulation of respiratory burst / amyloid-beta clearance / regulation of embryonic development / positive regulation of receptor internalization / insulin receptor substrate binding / protein kinase activator activity / epidermis development / positive regulation of glycogen biosynthetic process / Signal attenuation / transport across blood-brain barrier / heart morphogenesis / phosphatidylinositol 3-kinase binding / Insulin receptor recycling / insulin-like growth factor receptor binding / neuron projection maintenance / dendrite membrane / positive regulation of mitotic nuclear division / Insulin receptor signalling cascade / insulin receptor activity / receptor-mediated endocytosis / learning / positive regulation of glycolytic process / positive regulation of D-glucose import / receptor protein-tyrosine kinase / cellular response to growth factor stimulus / receptor internalization / caveola / memory / cellular response to insulin stimulus / male gonad development / positive regulation of nitric oxide biosynthetic process / late endosome / insulin receptor signaling pathway / glucose homeostasis / amyloid-beta binding / PI5P, PP2A and IER3 Regulate PI3K/AKT Signaling / protein autophosphorylation / protein tyrosine kinase activity / lysosome / positive regulation of canonical NF-kappaB signal transduction / receptor complex / positive regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction / positive regulation of MAPK cascade / endosome membrane / positive regulation of cell migration / G protein-coupled receptor signaling pathway / protein domain specific binding / symbiont entry into host cell / external side of plasma membrane / axon / positive regulation of cell population proliferation / regulation of DNA-templated transcription / protein-containing complex binding / GTP binding / positive regulation of DNA-templated transcription / extracellular exosome / ATP binding / identical protein binding / membrane / plasma membrane 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: 6.26 Å | ||||||
![]() | Kim, J. / Na, J. / Yunn, N. / Ryu, S. / Cho, Y. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structural mechanism of insulin receptor activation by a dimeric aptamer agonist. 著者: Junhong Kim / Hyeonjin Na / Si-Young Choi / Eun Ju Oh / Hyunsook Lee / Sung Ho Ryu / Na-Oh Yunn / Yunje Cho / ![]() 要旨: Insulin binding to the insulin receptor (IR) triggers signaling pathways that regulate glucose uptake and cell growth. In previous work, we identified a DNA aptamer, A62, which partially activates ...Insulin binding to the insulin receptor (IR) triggers signaling pathways that regulate glucose uptake and cell growth. In previous work, we identified a DNA aptamer, A62, which partially activates the IR. During engineering aptamers for improved in vivo stability, we discovered that crosslinking two A62 aptamers with linkers of varying lengths led to full phosphorylation of the IR, although activation remained selective to the AKT pathway. Here, to elucidate the mechanism behind this aptamer-induced full activation of the IR, we determined the structure of the IR in complex with a dimeric form of A62 (A62D) linked by an eight-nucleotide connector. We identified three distinct conformations of the IR: arrowhead-shaped, pseudo-arrowhead-shaped and pseudo-gamma-shaped. The pseudo-gamma-shaped conformation closely resembles the structure of a fully active IR bound by a single insulin molecule. In these configurations, only one A62 monomer (A62M) within the A62D dimer binds to the IR dimer. This binding brings the IR monomers into close proximity, promoting intermolecular trans-phosphorylation. Our findings provide valuable structural insights for the development of novel therapeutic strategies targeting the IR. #1: ![]() タイトル: Structural mechanism of insulin receptor activation by a dimeric aptamer agonist. 著者: Junhong Kim / Hyeonjin Na / Si-Young Choi / Eun Ju Oh / Hyunsook Lee / Sung Ho Ryu / Na-Oh Yunn / Yunje Cho / ![]() 要旨: Insulin binding to the insulin receptor (IR) triggers signaling pathways that regulate glucose uptake and cell growth. In previous work, we identified a DNA aptamer, A62, which partially activates ...Insulin binding to the insulin receptor (IR) triggers signaling pathways that regulate glucose uptake and cell growth. In previous work, we identified a DNA aptamer, A62, which partially activates the IR. During engineering aptamers for improved in vivo stability, we discovered that crosslinking two A62 aptamers with linkers of varying lengths led to full phosphorylation of the IR, although activation remained selective to the AKT pathway. Here, to elucidate the mechanism behind this aptamer-induced full activation of the IR, we determined the structure of the IR in complex with a dimeric form of A62 (A62D) linked by an eight-nucleotide connector. We identified three distinct conformations of the IR: arrowhead-shaped, pseudo-arrowhead-shaped and pseudo-gamma-shaped. The pseudo-gamma-shaped conformation closely resembles the structure of a fully active IR bound by a single insulin molecule. In these configurations, only one A62 monomer (A62M) within the A62D dimer binds to the IR dimer. This binding brings the IR monomers into close proximity, promoting intermolecular trans-phosphorylation. Our findings provide valuable structural insights for the development of novel therapeutic strategies targeting the IR. | ||||||
履歴 |
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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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 | ![]() | 329.3 KB | 表示 | ![]() |
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PDB形式 | ![]() | 266.6 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 1.3 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.4 MB | 表示 | |
XML形式データ | ![]() | 67.9 KB | 表示 | |
CIF形式データ | ![]() | 97.9 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 61431MC ![]() 9jfdC ![]() 9jhsC 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 ![]() |
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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: 104812.828 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() #2: DNA鎖 | 分子量: 8526.799 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() 研究の焦点であるリガンドがあるか | N | 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: Human insulin receptor with A62D aptamer / タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT |
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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: Talos Arctica / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI TALOS ARCTICA |
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): 2000 nm / 最小 デフォーカス(公称値): 1000 nm |
撮影 | 電子線照射量: 50 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 ONLY | ||||||||||||
3次元再構成 | 解像度: 6.26 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 86854 / 対称性のタイプ: POINT |