View source for 8hjt


==Crystal Structure of Intracellular B30.2 Domain of VpBTN3 and VpBTN2 in Complex with HMBPP==
<StructureSection load='8hjt' size='340' side='right'caption='[[8hjt]], [[Resolution|resolution]] 2.91&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[8hjt]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Vicugna_pacos Vicugna pacos]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8HJT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8HJT FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.91&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=EPE:4-(2-HYDROXYETHYL)-1-PIPERAZINE+ETHANESULFONIC+ACID'>EPE</scene>, <scene name='pdbligand=H6P:(2E)-4-HYDROXY-3-METHYLBUT-2-EN-1-YL+TRIHYDROGEN+DIPHOSPHATE'>H6P</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=8hjt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8hjt OCA], [https://pdbe.org/8hjt PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8hjt RCSB], [https://www.ebi.ac.uk/pdbsum/8hjt PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8hjt ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/A0A6J0B3M7_VICPA A0A6J0B3M7_VICPA] 
<div style="background-color:#fffaf0;">
== 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;621(7980):840-848. doi: 10.1038/s41586-023-06525-3. Epub 2023 , Sep 6. PMID:37674084<ref>PMID:37674084</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 8hjt" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Vicugna pacos]]
[[Category: Chen C-C]]
[[Category: Guo R-T]]
[[Category: Huang J-W]]
[[Category: Li X]]
[[Category: Shen PP]]
[[Category: Yang YY]]
[[Category: Yi SM]]
[[Category: Zhang MT]]