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基本情報
登録情報 | データベース: PDB / ID: 9ind | ||||||
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タイトル | Integrin alpha-v beta-8 in complex with the Fab of 130H2 | ||||||
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![]() | SIGNALING PROTEIN/IMMUNE SYSTEM / Cryo-EM / Integrin / Complex / SIGNALING PROTEIN-IMMUNE SYSTEM complex | ||||||
機能・相同性 | ![]() ganglioside metabolic process / hard palate development / Langerhans cell differentiation / integrin alphav-beta8 complex / integrin alphav-beta6 complex / transforming growth factor beta production / negative regulation of entry of bacterium into host cell / integrin alphav-beta5 complex / extracellular matrix protein binding / opsonin binding ...ganglioside metabolic process / hard palate development / Langerhans cell differentiation / integrin alphav-beta8 complex / integrin alphav-beta6 complex / transforming growth factor beta production / negative regulation of entry of bacterium into host cell / integrin alphav-beta5 complex / extracellular matrix protein binding / opsonin binding / integrin alphav-beta1 complex / Cross-presentation of particulate exogenous antigens (phagosomes) / placenta blood vessel development / Laminin interactions / negative regulation of lipoprotein metabolic process / integrin alphav-beta3 complex / entry into host cell by a symbiont-containing vacuole / alphav-beta3 integrin-PKCalpha complex / alphav-beta3 integrin-HMGB1 complex / negative regulation of lipid transport / regulation of phagocytosis / : / Elastic fibre formation / alphav-beta3 integrin-IGF-1-IGF1R complex / transforming growth factor beta binding / positive regulation of small GTPase mediated signal transduction / filopodium membrane / extracellular matrix binding / apolipoprotein A-I-mediated signaling pathway / apoptotic cell clearance / wound healing, spreading of epidermal cells / integrin complex / heterotypic cell-cell adhesion / cartilage development / Molecules associated with elastic fibres / Mechanical load activates signaling by PIEZO1 and integrins in osteocytes / negative chemotaxis / cell adhesion mediated by integrin / Syndecan interactions / microvillus membrane / cell-substrate adhesion / positive regulation of osteoblast proliferation / endodermal cell differentiation / PECAM1 interactions / TGF-beta receptor signaling activates SMADs / positive regulation of intracellular signal transduction / lamellipodium membrane / fibronectin binding / negative regulation of macrophage derived foam cell differentiation / negative regulation of lipid storage / ECM proteoglycans / Integrin cell surface interactions / voltage-gated calcium channel activity / vasculogenesis / specific granule membrane / coreceptor activity / extrinsic apoptotic signaling pathway in absence of ligand / phagocytic vesicle / ERK1 and ERK2 cascade / positive regulation of cell adhesion / transforming growth factor beta receptor signaling pathway / substrate adhesion-dependent cell spreading / protein kinase C binding / Turbulent (oscillatory, disturbed) flow shear stress activates signaling by PIEZO1 and integrins in endothelial cells / cell-matrix adhesion / Signal transduction by L1 / integrin-mediated signaling pathway / negative regulation of extrinsic apoptotic signaling pathway / calcium ion transmembrane transport / cell-cell adhesion / response to virus / VEGFA-VEGFR2 Pathway / ruffle membrane / positive regulation of angiogenesis / integrin binding / cell migration / virus receptor activity / positive regulation of cytosolic calcium ion concentration / protease binding / angiogenesis / cell adhesion / immune response / positive regulation of cell migration / symbiont entry into host cell / external side of plasma membrane / negative regulation of gene expression / focal adhesion / positive regulation of cell population proliferation / Neutrophil degranulation / positive regulation of gene expression / cell surface / extracellular exosome / metal ion binding / membrane / plasma membrane / cytosol 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: 2.88 Å | ||||||
![]() | Sun, H. / Zheng, Q. / Gui, X. | ||||||
資金援助 | 1件
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![]() | ![]() タイトル: Specifically blocking αvβ8-mediated TGF-β signaling to reverse immunosuppression by modulating macrophage polarization. 著者: Cuicui Guo / Hui Sun / Yulei Du / Xiaodong Dai / Yu Pang / Zhen Han / Xinhui Xiong / Shaowei Li / Junhua Zhang / Qingbing Zheng / Xun Gui / ![]() 要旨: BACKGROUND: Targeting the TGF-β pathway in tumor therapy has proven challenging due to the highly context-dependent functions of TGF-β. Integrin αvβ8, a pivotal activator of TGF-β, has been ...BACKGROUND: Targeting the TGF-β pathway in tumor therapy has proven challenging due to the highly context-dependent functions of TGF-β. Integrin αvβ8, a pivotal activator of TGF-β, has been implicated in TGF-β signaling within tumors, as demonstrated by the significant anti-tumor effects of anti-αvβ8 antibodies. Nevertheless, the expression profile of αvβ8 remains a subject of debate, and the precise mechanisms underlying the anti-tumor effects of anti-αvβ8 antibodies are not yet fully elucidated. 手法: We utilized single-cell RNA sequencing to assess αvβ8 expression across various human tumors. An anti-αvβ8 antibody was developed and characterized for its binding and blocking properties ...手法: We utilized single-cell RNA sequencing to assess αvβ8 expression across various human tumors. An anti-αvβ8 antibody was developed and characterized for its binding and blocking properties in vitro. Cryo-EM single-particle analysis was employed to study the detailed interaction between αvβ8 and the antibody Fab fragment. The anti-tumor efficacy of the antibody was evaluated in syngeneic mouse models with varying levels of αvβ8 expression, both as a monotherapy and in combination with PD-1 antibodies. Human PBMCs were isolated to investigate αvβ8 expression in myeloid cells, and macrophages were exposed to the antibody to study its impact on macrophage polarization. Pharmacokinetic studies of the αvβ8 antibody were conducted in cynomolgus monkeys. RESULTS: Integrin αvβ8 is notably expressed in certain tumor types and tumor-infiltrating macrophages. The specific αvβ8 antibody 130H2 demonstrated high affinity, specificity, and blocking ...RESULTS: Integrin αvβ8 is notably expressed in certain tumor types and tumor-infiltrating macrophages. The specific αvβ8 antibody 130H2 demonstrated high affinity, specificity, and blocking potency in vitro. Cryo-EM analysis further revealed that 130H2 interacts exclusively with the β8 subunit, without binding to the αv subunit. In vivo studies showed that this antibody significantly inhibited tumor growth and alleviated immunosuppression by promoting immune cell infiltration. Furthermore, combining the antibody with PD-1 inhibition produced a synergistic anti-tumor effect. In human PBMCs, monocytes exhibited high αvβ8 expression, and the antibody directly modulated macrophage polarization. Tumors with elevated αvβ8 expression were particularly responsive to 130H2 treatment. Additionally, favorable pharmacokinetic properties were observed in cynomolgus monkeys. CONCLUSIONS: In summary, integrin αvβ8 is highly expressed in certain tumors and tumor-infiltrating macrophages. Targeting αvβ8 with a blocking antibody significantly inhibits tumor growth by ...CONCLUSIONS: In summary, integrin αvβ8 is highly expressed in certain tumors and tumor-infiltrating macrophages. Targeting αvβ8 with a blocking antibody significantly inhibits tumor growth by modulating macrophage polarization and enhancing immune cell infiltration. Combining αvβ8 targeting with PD-1 treatment markedly increases the sensitivity of immune-excluded tumors. These results support further clinical evaluation of αvβ8 antibodies. | ||||||
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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 | ![]() | 185.7 KB | 表示 | ![]() |
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PDB形式 | ![]() | 142.8 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 | ![]() 60703MC 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
-タンパク質 , 2種, 2分子 AB
#1: タンパク質 | 分子量: 47991.176 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() |
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#4: タンパク質 | 分子量: 39304.863 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() |
-抗体 , 2種, 2分子 HL
#2: 抗体 | 分子量: 13290.723 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() |
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#3: 抗体 | 分子量: 11332.628 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() |
-糖 , 2種, 5分子 
#5: 多糖 | alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2- ...alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose |
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#6: 糖 | ChemComp-NAG / |
-詳細
研究の焦点であるリガンドがあるか | Y |
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Has protein modification | 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 |
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由来(天然) |
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由来(組換発現) |
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緩衝液 | pH: 7.4 | ||||||||||||||||||||||||
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): 2000 nm / 最小 デフォーカス(公称値): 800 nm |
撮影 | 電子線照射量: 48 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
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解析
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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3次元再構成 | 解像度: 2.88 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 96290 / 対称性のタイプ: POINT |