- EMDB-47104: CryoEM Structure of Human BTN2A1 ectodomain in complex with TCR-b... -
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基本情報
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データベース: EMDB / ID: EMD-47104
タイトル
CryoEM Structure of Human BTN2A1 ectodomain in complex with TCR-blocking 2A1.12 Fab
マップデータ
RELION multi-body refinement, body 1 full map
試料
複合体: Complex of Dimeric Human BTN2A1 ectodomain with TCR-Blocking 2A1.12 Fab and bulking Nanobody
細胞器官・細胞要素: Human BTN2A1 ectodomain
タンパク質・ペプチド: Butyrophilin subfamily 2 member A1
細胞器官・細胞要素: Anti-BTN2A1 Fab 2A1.12
細胞器官・細胞要素: Heavy chain of 2A1.12 Fab
タンパク質・ペプチド: Human IgG1 Fragment Antibody Heavy Chain
細胞器官・細胞要素: Light chain of 2A1.12 Fab
タンパク質・ペプチド: Human IgG1 Fragment Antibody Light Chain
細胞器官・細胞要素: Variable heavy chain domain nanobody
タンパク質・ペプチド: Human variable heavy-chain domain Nanobody
リガンド: 2-acetamido-2-deoxy-beta-D-glucopyranose
キーワード
Complex / Antibody / Immune Recognition / SIGNALING PROTEIN / IMMUNE SYSTEM
機能・相同性
機能・相同性情報
Butyrophilin (BTN) family interactions / regulation of cytokine production / lipid metabolic process / T cell receptor signaling pathway / signaling receptor binding / external side of plasma membrane / plasma membrane 類似検索 - 分子機能
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
米国
引用
ジャーナル: Sci Rep / 年: 2025 タイトル: Mapping the extracellular molecular architecture of the pAg-signaling complex with α-Butyrophilin antibodies. 著者: Amrita Ramesh / Sobhan Roy / Tomasz Slezak / James Fuller / Hortencia Graves / Murad R Mamedov / Alexander Marson / Anthony A Kossiakoff / Erin J Adams / 要旨: Target cells trigger Vγ9Vδ2 T cell activation by signaling the intracellular accumulation of phospho-antigen metabolites (pAgs) through Butyrophilin (BTN)-3A1 and BTN2A1 to the Vγ9Vδ2 T cell ...Target cells trigger Vγ9Vδ2 T cell activation by signaling the intracellular accumulation of phospho-antigen metabolites (pAgs) through Butyrophilin (BTN)-3A1 and BTN2A1 to the Vγ9Vδ2 T cell receptor (TCR). An incomplete understanding of the molecular dynamics in this signaling complex hampers Vγ9Vδ2 T cell immunotherapeutic efficacy. A panel of engineered α-BTN3A1 and α-BTN2A1 antibody (mAb) reagents was used to probe the roles of BTN3A1 and BTN2A1 in pAg signaling. Modified α-BTN3A1 mAbs with increased inter-Fab distances establish that tight clustering of BTN3A1 is not necessary to stimulate Vγ9Vδ2 T cell activation, and that antagonism may occur through occlusion of a critical binding interaction between BTN3A1 and a yet unknown co-receptor. Finally, a panel of additional α-BTN2A1 antagonists utilize different biophysical mechanisms to compete with Vγ9Vδ2 TCRs for BTN2A1 binding. The complex structures of BTN2A1 ectodomain and Fabs from three antagonist mAbs provide molecular insights into BTN2A1 epitopes critical for pAg-signaling.
名称: Butyrophilin subfamily 2 member A1 / タイプ: protein_or_peptide / ID: 1 詳細: BTN2A1 ectodomain with N- and C-terminal linkers. N-terminal (ADLQ) and C-terminal (VSPCGSGLEVLFQ) residues are disordered and not modeled. 3 glycans are denoted as NAG. コピー数: 1 / 光学異性体: LEVO
名称: Human IgG1 Fragment Antibody Heavy Chain / タイプ: protein_or_peptide / ID: 2 詳細: Heavy chain of Herceptin Fab scaffold with CDR loops modified through phage-display evolution. (CDR1: FSSSI) (CDR2: SIYSSSGYTY) (CDR3: IEYGRGYWDAF). N-terminal (EIS) is a linker/restriction ...詳細: Heavy chain of Herceptin Fab scaffold with CDR loops modified through phage-display evolution. (CDR1: FSSSI) (CDR2: SIYSSSGYTY) (CDR3: IEYGRGYWDAF). N-terminal (EIS) is a linker/restriction enzyme artifact and first residue of Fab, and disordered and not modeled. コピー数: 1 / 光学異性体: LEVO
名称: Human variable heavy-chain domain Nanobody / タイプ: protein_or_peptide / ID: 4 詳細: Human variable heavy-chain domain Nanobody specific for human Fab kappa light chain with a hexahistidine tag and linker (HHHHHHGENLYFQGS). Tag and linker are disordered and not shown. コピー数: 1 / 光学異性体: LEVO