- PDB-9jqp: Cryo-EM structure of the HMBPP-primed BTN3A1-BTN3A2-BTN2A1 in com... -
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基本情報
登録情報
データベース: PDB / ID: 9jqp
タイトル
Cryo-EM structure of the HMBPP-primed BTN3A1-BTN3A2-BTN2A1 in complex with agonist antibody TH001
要素
(BTN3A agonist antibody TH001, variable domain of ...) x 2
(Butyrophilin subfamily 3 member ...) x 2
Butyrophilin subfamily 2 member A1
キーワード
IMMUNE SYSTEM / antibody / agonist / phosphoantigen / butyrophilin
機能・相同性
機能・相同性情報
Butyrophilin (BTN) family interactions / T cell mediated immunity / activated T cell proliferation / regulation of cytokine production / positive regulation of cytokine production / lipid metabolic process / positive regulation of type II interferon production / T cell receptor signaling pathway / adaptive immune response / external side of plasma membrane ...Butyrophilin (BTN) family interactions / T cell mediated immunity / activated T cell proliferation / regulation of cytokine production / positive regulation of cytokine production / lipid metabolic process / positive regulation of type II interferon production / T cell receptor signaling pathway / adaptive immune response / external side of plasma membrane / signaling receptor binding / membrane / plasma membrane 類似検索 - 分子機能
National Natural Science Foundation of China (NSFC)
32325018
中国
引用
ジャーナル: Immunity / 年: 2025 タイトル: Structures of butyrophilin multimers reveal a plier-like mechanism for Vγ9Vδ2 T cell receptor activation. 著者: Mai Zhang / Yiqing Wang / Ningning Cai / Yingying Qu / Xianqiang Ma / Jing Xue / Xiaorui Chen / Xueguang Zhang / Junyu Xiao / Yonghui Zhang / 要旨: Vγ9Vδ2 T cells, the major circulating human γδ T cell subset, respond to infections and tumors by recognizing phosphoantigens (pAgs) via transmembrane butyrophilins (BTN3A1, BTN3A2, and BTN2A1). ...Vγ9Vδ2 T cells, the major circulating human γδ T cell subset, respond to infections and tumors by recognizing phosphoantigens (pAgs) via transmembrane butyrophilins (BTN3A1, BTN3A2, and BTN2A1). Here, using cryoelectron microscopy, we resolved the structures of BTN multimers bound to the microbial pAg HMBPP alone and in complex with the T cell receptor (TCR). These structures reveal that BTN3A1 and BTN2A1 cooperate to sense pAgs through their intracellular B30.2 domains, whereas BTN3A2 and BTN2A1 interact extracellularly. TCR engagement triggers its conformational changes, allowing BTN2A1 to bind the Vγ9 chain laterally and BTN3A2 to interact apically with the Vδ2 chain's germline-encoded regions and CDR3 motif, as well as the Vγ9 CDR3. Our study uncovers a "plier-like gripping" mechanism, where BTN multimers bridge the TCR surface to drive activation. These findings establish a structural foundation for γδ T cell-targeted immunotherapies distinct from αβ T cell strategies reliant on major-histocompatibility-complex-mediated antigen presentation.