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データを開く
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基本情報
| 登録情報 | データベース: PDB / ID: 9pkv | ||||||||||||||||||||||||
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| タイトル | HU-38 Fab with PRAME pMHC | ||||||||||||||||||||||||
要素 |
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キーワード | PEPTIDE BINDING PROTEIN/IMMUNE SYSTEM / PRAME / pMHC / PEPTIDE BINDING PROTEIN / PEPTIDE BINDING PROTEIN-IMMUNE SYSTEM complex | ||||||||||||||||||||||||
| 機能・相同性 | 機能・相同性情報antigen processing and presentation of peptide antigen via MHC class I / early endosome lumen / Nef mediated downregulation of MHC class I complex cell surface expression / DAP12 interactions / Endosomal/Vacuolar pathway / T cell mediated cytotoxicity / Antigen Presentation: Folding, assembly and peptide loading of class I MHC / lumenal side of endoplasmic reticulum membrane / regulation of iron ion transport / cellular response to iron(III) ion ...antigen processing and presentation of peptide antigen via MHC class I / early endosome lumen / Nef mediated downregulation of MHC class I complex cell surface expression / DAP12 interactions / Endosomal/Vacuolar pathway / T cell mediated cytotoxicity / Antigen Presentation: Folding, assembly and peptide loading of class I MHC / lumenal side of endoplasmic reticulum membrane / regulation of iron ion transport / cellular response to iron(III) ion / negative regulation of iron ion transport / negative regulation of forebrain neuron differentiation / antigen processing and presentation of exogenous protein antigen via MHC class Ib, TAP-dependent / ER to Golgi transport vesicle membrane / peptide antigen assembly with MHC class I protein complex / regulation of erythrocyte differentiation / response to molecule of bacterial origin / HFE-transferrin receptor complex / transferrin transport / MHC class I peptide loading complex / cellular response to iron ion / negative regulation of receptor-mediated endocytosis / positive regulation of T cell cytokine production / antigen processing and presentation of endogenous peptide antigen via MHC class I / MHC class I protein complex / peptide antigen assembly with MHC class II protein complex / negative regulation of neurogenesis / cellular response to nicotine / MHC class II protein complex / positive regulation of receptor-mediated endocytosis / multicellular organismal-level iron ion homeostasis / positive regulation of T cell mediated cytotoxicity / specific granule lumen / positive regulation of immune response / antigen processing and presentation of exogenous peptide antigen via MHC class II / peptide antigen binding / phagocytic vesicle membrane / recycling endosome membrane / positive regulation of T cell activation / negative regulation of epithelial cell proliferation / Interferon gamma signaling / Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell / Modulation by Mtb of host immune system / positive regulation of cellular senescence / sensory perception of smell / tertiary granule lumen / MHC class II protein complex binding / DAP12 signaling / T cell differentiation in thymus / late endosome membrane / negative regulation of neuron projection development / protein refolding / ER-Phagosome pathway / early endosome membrane / amyloid fibril formation / protein homotetramerization / intracellular iron ion homeostasis / learning or memory / endoplasmic reticulum lumen / Amyloid fiber formation / Golgi membrane / external side of plasma membrane / lysosomal membrane / focal adhesion / Neutrophil degranulation / SARS-CoV-2 activates/modulates innate and adaptive immune responses / structural molecule activity / endoplasmic reticulum / Golgi apparatus / protein homodimerization activity / : / extracellular exosome / extracellular region / membrane / identical protein binding / plasma membrane / cytosol 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: 2.72 Å | ||||||||||||||||||||||||
データ登録者 | Mortenson, D.E. / Yu, X. | ||||||||||||||||||||||||
| 資金援助 | 1件
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引用 | ジャーナル: MAbs / 年: 2025タイトル: Development of a PRAME pMHC targeted T cell engager for solid tumor therapy. 著者: Katarzyna Skrzypczynska / Kristin Schimert / Heather Stephenson / In Kyoung Mah / David Mortenson / Kelli Boyd / Timothy Hardman / Nikolai Novikov / Elbert Seto / Sabrina Lu / Randy Yen / ...著者: Katarzyna Skrzypczynska / Kristin Schimert / Heather Stephenson / In Kyoung Mah / David Mortenson / Kelli Boyd / Timothy Hardman / Nikolai Novikov / Elbert Seto / Sabrina Lu / Randy Yen / Brian Lee / Min Wang / Don Kang / Ying Huang / Xinchao Yu / Magdeleine Hung / Sheng Ding / Nathan Thomsen / Nicole Schirle Oakdale / ![]() 要旨: Bispecific T cell engager (TCE) therapies have demonstrated transformative clinical success in the treatment of hematological cancers, but the lack of antigens that are sufficiently selective for ...Bispecific T cell engager (TCE) therapies have demonstrated transformative clinical success in the treatment of hematological cancers, but the lack of antigens that are sufficiently selective for malignant cells has hampered the success of TCEs in the solid-tumor space. To overcome the on-target, off-tumor toxicities that result from the expression of even low levels of tumor-associated antigens in healthy tissues, we sought to identify a TCE target with highly tumor-restricted expression patterns. Here, we characterize cancer-testes antigen Preferentially Expressed Antigen in Melanoma (PRAME) as a highly selective tumor antigen and identify a proteasomal degradation peptide PRAME (PRAME) presented in the context of major histocompatibility complex I (MHCI) as an attractive TCE target. We designed a TCR-mimic (TCRm) antibody screening cascade that prioritizes screening anti-PRAME pMHC binders in off-target T cell dependent cellular cytotoxicity assays in a potent TCE format, rather than relying solely on traditional pMHC binding assays, to determine specificity. Using this screening cascade, we discovered antibodies that selectively bind PRAME pMHC without over-recognition of off-target peptides or MHCI via a TCR-like binding geometry. We further solved the first structure of an anti-PRAME pMHC TCRm antibody in complex with PRAME/HLA-A *02:01 using cryo electron microscopy to confirm the TCRm antibody binds in a TCR-like binding geometry and specifically recognizes the PRAME peptide. By formatting these novel TCRm antibodies into potent TCEs, we demonstrate PRAME pMHC-specific killing of tumor cells, representing a new class of anti-PRAME pMHC biologics. | ||||||||||||||||||||||||
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構造の表示
| 構造ビューア | 分子: Molmil Jmol/JSmol |
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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 | 9pkv.cif.gz | 193.9 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb9pkv.ent.gz | 147.4 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 9pkv.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
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/pk/9pkv ftp://data.pdbj.org/pub/pdb/validation_reports/pk/9pkv | HTTPS FTP |
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-関連構造データ
| 関連構造データ | ![]() 71704MC 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 F&H 検索 |
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リンク
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集合体
| 登録構造単位 | ![]()
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| 1 |
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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: 34359.895 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: HLA-A / 発現宿主: ![]() |
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| #5: タンパク質 | 分子量: 11879.356 Da / 分子数: 1 / Fragment: UNP residues 21-119 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: B2M, CDABP0092, HDCMA22P / 発現宿主: ![]() |
-抗体 , 3種, 3分子 KHL
| #2: 抗体 | 分子量: 13246.515 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: 抗体 | 分子量: 25680.639 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() Homo sapiens (ヒト) |
| #6: 抗体 | 分子量: 23287.822 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() Homo sapiens (ヒト) |
-タンパク質・ペプチド / 非ポリマー , 2種, 192分子 P

| #3: タンパク質・ペプチド | 分子量: 994.209 Da / 分子数: 1 / 由来タイプ: 合成 / 由来: (合成) Homo sapiens (ヒト) |
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| #7: 水 | ChemComp-HOH / |
-詳細
| 研究の焦点であるリガンドがあるか | N |
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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 | 名称: complex of HU38 Fab with PRAME pMHC and anti-Kappa VHH タイプ: COMPLEX / Entity ID: #1-#6 / 由来: MULTIPLE SOURCES |
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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: ![]() |
| 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 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 10 K |
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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: TFS KRIOS |
| 電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: SPOT SCAN |
| 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 / Cs: 2.7 mm |
| 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 AND AMPLITUDE CORRECTION | ||||||||||||||||||||
| 3次元再構成 | 解像度: 2.72 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 553793 / 対称性のタイプ: POINT |
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万見について




Homo sapiens (ヒト)

引用

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FIELD EMISSION GUN