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基本情報
登録情報 | データベース: PDB / ID: 8zox | ||||||
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タイトル | 3D structure of Y-50 TCR-TMM-CD1b ternary complex | ||||||
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![]() | IMMUNE SYSTEM | ||||||
機能・相同性 | ![]() exogenous lipid antigen binding / antigen processing and presentation, endogenous lipid antigen via MHC class Ib / lipopeptide binding / endogenous lipid antigen binding / antigen processing and presentation, exogenous lipid antigen via MHC class Ib / negative regulation of receptor binding / early endosome lumen / Nef mediated downregulation of MHC class I complex cell surface expression / DAP12 interactions / transferrin transport ...exogenous lipid antigen binding / antigen processing and presentation, endogenous lipid antigen via MHC class Ib / lipopeptide binding / endogenous lipid antigen binding / antigen processing and presentation, exogenous lipid antigen via MHC class Ib / negative regulation of receptor binding / early endosome lumen / Nef mediated downregulation of MHC class I complex cell surface expression / DAP12 interactions / transferrin transport / cellular response to iron ion / Endosomal/Vacuolar pathway / Antigen Presentation: Folding, assembly and peptide loading of class I MHC / peptide antigen assembly with MHC class II protein complex / antigen processing and presentation of exogenous protein antigen via MHC class Ib, TAP-dependent / cellular response to iron(III) ion / MHC class II protein complex / negative regulation of forebrain neuron differentiation / ER to Golgi transport vesicle membrane / peptide antigen assembly with MHC class I protein complex / regulation of erythrocyte differentiation / 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 / antigen processing and presentation of exogenous peptide antigen via MHC class II / positive regulation of immune response / MHC class I protein complex / positive regulation of T cell activation / peptide antigen binding / positive regulation of receptor-mediated endocytosis / negative regulation of neurogenesis / positive regulation of T cell mediated cytotoxicity / cellular response to nicotine / multicellular organismal-level iron ion homeostasis / Modulation by Mtb of host immune system / specific granule lumen / phagocytic vesicle membrane / recycling endosome membrane / Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell / Interferon gamma signaling / negative regulation of epithelial cell proliferation / MHC class II protein complex binding / late endosome membrane / sensory perception of smell / positive regulation of cellular senescence / tertiary granule lumen / DAP12 signaling / T cell differentiation in thymus / ER-Phagosome pathway / negative regulation of neuron projection development / protein refolding / early endosome membrane / protein homotetramerization / adaptive immune response / amyloid fibril formation / intracellular iron ion homeostasis / learning or memory / endosome membrane / immune response / Amyloid fiber formation / endoplasmic reticulum lumen / Golgi membrane / lysosomal membrane / external side of plasma membrane / focal adhesion / intracellular membrane-bounded organelle / Neutrophil degranulation / SARS-CoV-2 activates/modulates innate and adaptive immune responses / structural molecule activity / cell surface / endoplasmic reticulum / Golgi apparatus / protein homodimerization activity / extracellular space / extracellular exosome / extracellular region / identical protein 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: 3.18 Å | ||||||
![]() | Asa, M. / Hirose, M. / Nagae, M. / Yamasaki, S. / Kato, T. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: A conserved human CD4+ T cell subset recognizing the mycobacterial adjuvant trehalose monomycolate. 著者: Yuki Sakai / Minori Asa / Mika Hirose / Wakana Kusuhara / Nagatoshi Fujiwara / Hiroto Tamashima / Takahiro Ikazaki / Shiori Oka / Kota Kuraba / Kentaro Tanaka / Takashi Yoshiyama / Masamichi ...著者: Yuki Sakai / Minori Asa / Mika Hirose / Wakana Kusuhara / Nagatoshi Fujiwara / Hiroto Tamashima / Takahiro Ikazaki / Shiori Oka / Kota Kuraba / Kentaro Tanaka / Takashi Yoshiyama / Masamichi Nagae / Yoshihiko Hoshino / Daisuke Motooka / Ildiko Van Rhijn / Xiuyuan Lu / Eri Ishikawa / D Branch Moody / Takayuki Kato / Shinsuke Inuki / Go Hirai / Sho Yamasaki / ![]() ![]() ![]() 要旨: Mycobacterium tuberculosis causes human tuberculosis (TB). As mycobacteria are protected by a thick lipid cell wall, humans have developed immune responses against diverse mycobacterial lipids. Most ...Mycobacterium tuberculosis causes human tuberculosis (TB). As mycobacteria are protected by a thick lipid cell wall, humans have developed immune responses against diverse mycobacterial lipids. Most of these immunostimulatory lipids are known as adjuvants acting through innate immune receptors, such as C-type lectin receptors. Although a few mycobacterial lipid antigens activate unconventional T cells, the antigenicity of most adjuvantic lipids is unknown. Here, we identified that trehalose monomycolate (TMM), an abundant mycobacterial adjuvant, activated human T cells bearing a unique αβ T cell receptor (αβTCR). This recognition was restricted by CD1b, a monomorphic antigen-presenting molecule conserved in primates but not mice. Single-cell TCR-RNA-Seq using newly established CD1b-TMM tetramers revealed that TMM-specific T cells were present as CD4+ effector memory T cells in the periphery of uninfected donors but expressed IFN-γ, TNF, and anti-mycobacterial effectors upon TMM stimulation. TMM-specific T cells were detected in cord blood and PBMCs of donors without bacillus Calmette-Guérin vaccination but were expanded in patients with active TB. A cryo-electron microscopy study of CD1b-TMM-TCR complexes revealed unique antigen recognition by conserved features of TCRs, positively charged CDR3α, and long CDR3β regions. These results indicate that humans have a commonly shared and preformed CD4+ T cell subset recognizing a typical mycobacterial adjuvant as an antigen. Furthermore, the dual role of TMM justifies reconsideration of the mechanism of action of adjuvants. | ||||||
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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 | ![]() | 222.1 KB | 表示 | ![]() |
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PDB形式 | ![]() | 表示 | ![]() | |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 1.4 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.5 MB | 表示 | |
XML形式データ | ![]() | 40.8 KB | 表示 | |
CIF形式データ | ![]() | 57 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 | ![]() 60321MC ![]() 8xubC ![]() 8zo4C C: 同じ文献を引用 ( M: このデータのモデリングに利用したマップデータ |
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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 , 4種, 4分子 ABDE
#1: タンパク質 | 分子量: 31005.990 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() |
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#2: タンパク質 | 分子量: 11879.356 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() |
#3: タンパク質 | 分子量: 23142.660 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() |
#4: タンパク質 | 分子量: 28191.834 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() |
-糖 , 2種, 4分子 


#6: 糖 | #7: 糖 | ChemComp-GLC / | |
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-非ポリマー , 2種, 2分子 
#5: 化合物 | ChemComp-6UL / |
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#8: 化合物 | ChemComp-A1L2B / [( 分子量: 658.989 Da / 分子数: 1 / 由来タイプ: 合成 / 式: C38H74O8 / タイプ: SUBJECT OF INVESTIGATION |
-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 | 名称: Ternary complex of Y-50TCR,TMM and CD1b / タイプ: COMPLEX / Entity ID: #1-#4 / 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: 8 |
試料 | 濃度: 1 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
試料支持 | グリッドの材料: GOLD / グリッドのサイズ: 200 divisions/in. / グリッドのタイプ: Quantifoil R0.6/1 |
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 95 % / 凍結前の試料温度: 277 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: FEI TITAN KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 105000 X / 最大 デフォーカス(公称値): 1800 nm / 最小 デフォーカス(公称値): 600 nm / Calibrated defocus min: 521 nm / 最大 デフォーカス(補正後): 2036 nm / Cs: 0.06 mm / C2レンズ絞り径: 50 µm / 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 最高温度: 78.2 K / 最低温度: 78.2 K |
撮影 | 平均露光時間: 3.169 sec. / 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) 撮影したグリッド数: 1 / 実像数: 8533 |
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 / 球面収差補正装置: CEOS corrector was used. |
画像スキャン | 横: 5760 / 縦: 4092 |
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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 | ||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 4075153 | ||||||||||||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.18 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 114111 / アルゴリズム: FOURIER SPACE / クラス平均像の数: 1 / 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 / Target criteria: Cross-correlation coefficient | ||||||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 8XUB PDB chain-ID: D / Accession code: 8XUB / Source name: PDB / タイプ: experimental model | ||||||||||||||||||||||||||||
精密化 | 交差検証法: NONE 立体化学のターゲット値: GeoStd + Monomer Library + CDL v1.2 | ||||||||||||||||||||||||||||
原子変位パラメータ | Biso mean: 125.22 Å2 | ||||||||||||||||||||||||||||
拘束条件 |
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