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基本情報
登録情報 | ![]() | |||||||||||||||
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タイトル | Structure of a fully assembled T-cell receptor engaging a tumor-associated peptide-MHC I | |||||||||||||||
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機能・相同性 | ![]() regulation of lymphocyte apoptotic process / gamma-delta T cell receptor complex / Fc-gamma receptor III complex / T cell anergy / positive regulation of T cell anergy / positive regulation of cell-cell adhesion mediated by integrin / cis-Golgi network membrane / positive regulation of melanin biosynthetic process / CD4-positive, alpha-beta T cell proliferation / Fc-gamma receptor signaling pathway ...regulation of lymphocyte apoptotic process / gamma-delta T cell receptor complex / Fc-gamma receptor III complex / T cell anergy / positive regulation of T cell anergy / positive regulation of cell-cell adhesion mediated by integrin / cis-Golgi network membrane / positive regulation of melanin biosynthetic process / CD4-positive, alpha-beta T cell proliferation / Fc-gamma receptor signaling pathway / gamma-delta T cell activation / negative thymic T cell selection / melanin biosynthetic process / melanosome membrane / multivesicular body, internal vesicle / melanosome organization / positive regulation of CD4-positive, alpha-beta T cell proliferation / multivesicular body membrane / alpha-beta T cell receptor complex / positive thymic T cell selection / positive regulation of protein localization to cell surface / signal complex assembly / Nef and signal transduction / positive regulation of cell-matrix adhesion / T cell mediated cytotoxicity directed against tumor cell target / T cell receptor complex / positive regulation of memory T cell activation / TAP complex binding / smoothened signaling pathway / establishment or maintenance of cell polarity / positive regulation of CD8-positive, alpha-beta T cell activation / CD8-positive, alpha-beta T cell activation / Golgi medial cisterna / positive regulation of CD8-positive, alpha-beta T cell proliferation / CD8 receptor binding / positive regulation of interleukin-4 production / dendrite development / Translocation of ZAP-70 to Immunological synapse / Phosphorylation of CD3 and TCR zeta chains / antigen processing and presentation of exogenous peptide antigen via MHC class I / endoplasmic reticulum exit site / alpha-beta T cell activation / antigen processing and presentation of endogenous peptide antigen via MHC class I via ER pathway, TAP-dependent / Generation of second messenger molecules / immunological synapse / TAP binding / FCGR activation / protection from natural killer cell mediated cytotoxicity / PD-1 signaling / Role of phospholipids in phagocytosis / beta-2-microglobulin binding / T cell receptor binding / positive regulation of calcium-mediated signaling / negative regulation of smoothened signaling pathway / detection of bacterium / positive regulation of T cell proliferation / cell surface receptor protein tyrosine kinase signaling pathway / T cell costimulation / T cell activation / positive regulation of interleukin-2 production / bioluminescence / cerebellum development / FCGR3A-mediated IL10 synthesis / protein tyrosine kinase binding / positive regulation of ferrous iron binding / positive regulation of transferrin receptor binding / positive regulation of receptor binding / early endosome lumen / Nef mediated downregulation of MHC class I complex cell surface expression / DAP12 interactions / negative regulation of receptor binding / generation of precursor metabolites and energy / antigen processing and presentation of endogenous peptide antigen via MHC class I via ER pathway, TAP-independent / antigen processing and presentation of endogenous peptide antigen via MHC class Ib / calcium-mediated signaling / lumenal side of endoplasmic reticulum membrane / cellular response to iron ion / Endosomal/Vacuolar pathway / apoptotic signaling pathway / Antigen Presentation: Folding, assembly and peptide loading of class I MHC / FCGR3A-mediated phagocytosis / cellular response to iron(III) ion / clathrin-coated endocytic vesicle membrane / antigen processing and presentation of exogenous protein antigen via MHC class Ib, TAP-dependent / negative regulation of forebrain neuron differentiation / regulation of erythrocyte differentiation / ER to Golgi transport vesicle membrane / peptide antigen assembly with MHC class I protein complex / regulation of iron ion transport / response to molecule of bacterial origin / MHC class I peptide loading complex / HFE-transferrin receptor complex / T cell mediated cytotoxicity / antigen processing and presentation of endogenous peptide antigen via MHC class I / positive regulation of T cell cytokine production / Regulation of actin dynamics for phagocytic cup formation / MHC class I protein complex / multicellular organismal-level iron ion homeostasis / negative regulation of neurogenesis / peptide antigen assembly with MHC class II protein complex 類似検索 - 分子機能 | |||||||||||||||
生物種 | ![]() ![]() ![]() | |||||||||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.08 Å | |||||||||||||||
![]() | Susac L / Thomas C / Tampe R | |||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structure of a fully assembled tumor-specific T cell receptor ligated by pMHC. 著者: Lukas Sušac / Mai T Vuong / Christoph Thomas / Sören von Bülow / Caitlin O'Brien-Ball / Ana Mafalda Santos / Ricardo A Fernandes / Gerhard Hummer / Robert Tampé / Simon J Davis / ![]() ![]() 要旨: The T cell receptor (TCR) expressed by T lymphocytes initiates protective immune responses to pathogens and tumors. To explore the structural basis of how TCR signaling is initiated when the ...The T cell receptor (TCR) expressed by T lymphocytes initiates protective immune responses to pathogens and tumors. To explore the structural basis of how TCR signaling is initiated when the receptor binds to peptide-loaded major histocompatibility complex (pMHC) molecules, we used cryogenic electron microscopy to determine the structure of a tumor-reactive TCRαβ/CD3δγεζ complex bound to a melanoma-specific human class I pMHC at 3.08 Å resolution. The antigen-bound complex comprises 11 subunits stabilized by multivalent interactions across three structural layers, with clustered membrane-proximal cystines stabilizing the CD3-εδ and CD3-εγ heterodimers. Extra density sandwiched between transmembrane helices reveals the involvement of sterol lipids in TCR assembly. The geometry of the pMHC/TCR complex suggests that efficient TCR scanning of pMHC requires accurate pre-positioning of T cell and antigen-presenting cell membranes. Comparisons of the ligand-bound and unliganded receptors, along with molecular dynamics simulations, indicate that TCRs can be triggered in the absence of spontaneous structural rearrangements. | |||||||||||||||
履歴 |
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構造の表示
添付画像 |
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ダウンロードとリンク
-EMDBアーカイブ
マップデータ | ![]() | 204.3 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 19 KB 19 KB | 表示 表示 | ![]() |
FSC (解像度算出) | ![]() | 13.3 KB | 表示 | ![]() |
画像 | ![]() | 91.3 KB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-検証レポート
文書・要旨 | ![]() | 450.7 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 450.2 KB | 表示 | |
XML形式データ | ![]() | 13.4 KB | 表示 | |
CIF形式データ | ![]() | 18.2 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 | ![]() 7phrMC M: このマップから作成された原子モデル 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
EMDBのページ | ![]() ![]() |
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「今月の分子」の関連する項目 |
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マップ
ファイル | ![]() | ||||||||||||||||||||
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ボクセルのサイズ | X=Y=Z: 1.05 Å | ||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||
詳細 | EMDB XML:
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-添付データ
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試料の構成要素
+全体 : Fully assembled T-cell receptor engaging a tumor-associated pepti...
+超分子 #1: Fully assembled T-cell receptor engaging a tumor-associated pepti...
+分子 #1: T-cell receptor alpha chain
+分子 #2: T-cell receptor beta chain
+分子 #3: T-cell surface glycoprotein CD3 gamma chain
+分子 #4: T-cell surface glycoprotein CD3 delta chain, green fluorescent protein
+分子 #5: T-cell surface glycoprotein CD3 epsilon chain
+分子 #6: HLA class I histocompatibility antigen, A alpha chain
+分子 #7: Beta-2-microglobulin
+分子 #8: Tumor-associated antigentic peptide gp100
+分子 #9: T-cell surface glycoprotein CD3 zeta chain
+分子 #10: 2-acetamido-2-deoxy-beta-D-glucopyranose
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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![]() | 単粒子再構成法 |
試料の集合状態 | particle |
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試料調製
緩衝液 | pH: 7.5 |
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凍結 | 凍結剤: ETHANE |
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電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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撮影 | フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 平均電子線量: 61.0 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD |
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |