8jyb | pdb_00008jyb

Crystal Structure of Intracellular B30.2 Domain of VpBTN3

spinqualitylabelsall models 8jyb, resolution 1.91Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 8jyb is a 2 chain structure with sequence from Vicugna pacos. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.91Å Ligands: SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A0A345DF50_VICPA Publication Abstract from PubMed In both cancer and infections, diseased cells are presented to human Vgamma9Vdelta2 T cells through an 'inside out' signalling process whereby structurally diverse phosphoantigen (pAg) molecules are sensed by the intracellular domain of butyrophilin BTN3A1(1-4). Here we show how-in both humans and alpaca-multiple pAgs function as 'molecular glues' to promote heteromeric association between the intracellular domains of BTN3A1 and the structurally similar butyrophilin BTN2A1. X-ray crystallography studies visualized that engagement of BTN3A1 with pAgs forms a composite interface for direct binding to BTN2A1, with various pAg molecules each positioned at the centre of the interface and gluing the butyrophilins with distinct affinities. Our structural insights guided mutagenesis experiments that led to disruption of the intracellular BTN3A1-BTN2A1 association, abolishing pAg-mediated Vgamma9Vdelta2 T cell activation. Analyses using structure-based molecular-dynamics simulations, (19)F-NMR investigations, chimeric receptor engineering and direct measurement of intercellular binding force revealed how pAg-mediated BTN2A1 association drives BTN3A1 intracellular fluctuations outwards in a thermodynamically favourable manner, thereby enabling BTN3A1 to push off from the BTN2A1 ectodomain to initiate T cell receptor-mediated gammadelta T cell activation. Practically, we harnessed the molecular-glue model for immunotherapeutics design, demonstrating chemical principles for developing both small-molecule activators and inhibitors of human gammadelta T cell function. Phosphoantigens glue butyrophilin 3A1 and 2A1 to activate Vgamma9Vdelta2 T cells.,Yuan L, Ma X, Yang Y, Qu Y, Li X, Zhu X, Ma W, Duan J, Xue J, Yang H, Huang JW, Yi S, Zhang M, Cai N, Zhang L, Ding Q, Lai K, Liu C, Zhang L, Liu X, Yao Y, Zhou S, Li X, Shen P, Chang Q, Malwal SR, He Y, Li W, Chen C, Chen CC, Oldfield E, Guo RT, Zhang Y Nature. 2023 Sep 6. doi: 10.1038/s41586-023-06525-3. PMID:37674084 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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