7phr
From Proteopedia
(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]] 3.08Å</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. | ||
| - | + | ==See Also== | |
| - | + | *[[Beta-2 microglobulin 3D structures|Beta-2 microglobulin 3D structures]] | |
| - | + | *[[CD3 3D structures|CD3 3D structures]] | |
| - | + | *[[MHC 3D structures|MHC 3D structures]] | |
| - | + | *[[MHC I 3D structures|MHC I 3D structures]] | |
| - | + | *[[T-cell receptor 3D structures|T-cell receptor 3D structures]] | |
| - | + | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
Current revision
Structure of a fully assembled T-cell receptor engaging a tumor-associated peptide-MHC I
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