7phr: Difference between revisions

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== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[7phr]] is a 11 chain structure with sequence from [https://en.wikipedia.org/wiki/Aequorea_victoria Aequorea victoria] and [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7PHR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7PHR FirstGlance]. <br>
<table><tr><td colspan='2'>[[7phr]] is a 11 chain structure with sequence from [https://en.wikipedia.org/wiki/Aequorea_victoria Aequorea victoria] and [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7PHR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7PHR FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.08&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</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=7phr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7phr OCA], [https://pdbe.org/7phr PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7phr RCSB], [https://www.ebi.ac.uk/pdbsum/7phr PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7phr ProSAT]</span></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=7phr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7phr OCA], [https://pdbe.org/7phr PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7phr RCSB], [https://www.ebi.ac.uk/pdbsum/7phr PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7phr ProSAT]</span></td></tr>
</table>
</table>
== Function ==
[[https://www.uniprot.org/uniprot/CD3G_HUMAN CD3G_HUMAN]] The CD3 complex mediates signal transduction.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The T cell receptor (TCR) expressed by T lymphocytes initiates protective immune responses to pathogens and tumors. To explore the structural basis of how TCR signaling is initiated when the receptor binds to peptide-loaded major histocompatibility complex (pMHC) molecules, we used cryogenic electron microscopy to determine the structure of a tumor-reactive TCRalphabeta/CD3deltagammaepsilon2zeta2 complex bound to a melanoma-specific human class I pMHC at 3.08 A resolution. The antigen-bound complex comprises 11 subunits stabilized by multivalent interactions across three structural layers, with clustered membrane-proximal cystines stabilizing the CD3-epsilondelta and CD3-epsilongamma heterodimers. Extra density sandwiched between transmembrane helices reveals the involvement of sterol lipids in TCR assembly. The geometry of the pMHC/TCR complex suggests that efficient TCR scanning of pMHC requires accurate pre-positioning of T cell and antigen-presenting cell membranes. Comparisons of the ligand-bound and unliganded receptors, along with molecular dynamics simulations, indicate that TCRs can be triggered in the absence of spontaneous structural rearrangements.


Structure of a fully assembled tumor-specific T cell receptor ligated by pMHC.,Susac L, Vuong MT, Thomas C, von Bulow S, O'Brien-Ball C, Santos AM, Fernandes RA, Hummer G, Tampe R, Davis SJ Cell. 2022 Aug 18;185(17):3201-3213.e19. doi: 10.1016/j.cell.2022.07.010. PMID:35985289<ref>PMID:35985289</ref>
==See Also==
 
*[[Beta-2 microglobulin 3D structures|Beta-2 microglobulin 3D structures]]
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
*[[CD3 3D structures|CD3 3D structures]]
</div>
*[[MHC 3D structures|MHC 3D structures]]
<div class="pdbe-citations 7phr" style="background-color:#fffaf0;"></div>
*[[MHC I 3D structures|MHC I 3D structures]]
== References ==
*[[T-cell receptor 3D structures|T-cell receptor 3D structures]]
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