View source for 2arj


==CD8alpha-alpha in complex with YTS 105.18 Fab==
<StructureSection load='2arj' size='340' side='right'caption='[[2arj]], [[Resolution|resolution]] 2.88&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2arj]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus] and [https://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2ARJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2ARJ 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]] 2.88&#8491;</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=2arj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2arj OCA], [https://pdbe.org/2arj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2arj RCSB], [https://www.ebi.ac.uk/pdbsum/2arj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2arj ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/CD8A_MOUSE CD8A_MOUSE] Identifies cytotoxic/suppressor T-cells that interact with MHC class I bearing targets. CD8 is thought to play a role in the process of T-cell mediated killing. CD8 alpha chains binds to class I MHC molecules alpha-3 domains.
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ar/2arj_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=2arj ConSurf].
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== Publication Abstract from PubMed ==
The CD8 glycoprotein functions as an essential element in the control of T-cell selection, maturation and the TCR-mediated response to peptide antigen. CD8 is expressed as both heterodimeric CD8alphabeta and homodimeric CD8alphaalpha isoforms, which have distinct physiological roles and exhibit tissue-specific expression patterns. CD8alphaalpha has previously been crystallized in complex with class I pMHC and, more recently, with the mouse class Ib thymic leukemia antigen (TL). Here, we present the crystal structure of a soluble form of mouse CD8alphaalpha in complex with rat monoclonal antibody YTS 105.18 Fab fragment at 2.88 A resolution. YTS 105.18, which is commonly used in the blockade of CD8+ T-cell activation in response to peptide antigen, is specific for mouse CD8alpha. The YTS 105.18 Fab is one of only five rat IgG Fab structures to have been reported to date. Analysis of the YTS 105.18 Fab epitope on CD8alpha reveals that this antibody blocks CD8 activity by hydrogen bonding to residues that are critical for interaction with both class I pMHC and TL. Structural comparison of the liganded and unliganded forms of soluble CD8alphaalpha indicates that the mouse CD8alphaalpha immunoglobulin-domain dimer does not undergo significant structural alteration upon interaction either with class I pMHC or TL.

Crystal structure of the TCR co-receptor CD8alphaalpha in complex with monoclonal antibody YTS 105.18 Fab fragment at 2.88 A resolution.,Shore DA, Teyton L, Dwek RA, Rudd PM, Wilson IA J Mol Biol. 2006 Apr 28;358(2):347-54. Epub 2006 Feb 23. PMID:16530222<ref>PMID:16530222</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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==See Also==
*[[CD8 3D structures|CD8 3D structures]]
== References ==
<references/>
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</StructureSection>
[[Category: Large Structures]]
[[Category: Mus musculus]]
[[Category: Rattus norvegicus]]
[[Category: Dwek RA]]
[[Category: Rudd PM]]
[[Category: Shore DA]]
[[Category: Teyton L]]
[[Category: Wilson IA]]