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{{STRUCTURE_2v2w|  PDB=2v2w  |  SCENE=  }}
==T CELL CROSS-REACTIVITY AND CONFORMATIONAL CHANGES DURING TCR ENGAGEMENT==
===T CELL CROSS-REACTIVITY AND CONFORMATIONAL CHANGES DURING TCR ENGAGEMENT===
<StructureSection load='2v2w' size='340' side='right' caption='[[2v2w]], [[Resolution|resolution]] 1.60&Aring;' scene=''>
{{ABSTRACT_PUBMED_15583017}}
== Structural highlights ==
<table><tr><td colspan='2'>[[2v2w]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=2bsu 2bsu]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2V2W OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2V2W FirstGlance]. <br>
</td></tr><tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1akj|1akj]], [[1ao7|1ao7]], [[1aqd|1aqd]], [[1b0g|1b0g]], [[1b0r|1b0r]], [[1bd2|1bd2]], [[1duy|1duy]], [[1duz|1duz]], [[1eey|1eey]], [[1eez|1eez]], [[1hhg|1hhg]], [[1hhh|1hhh]], [[1hhi|1hhi]], [[1hhj|1hhj]], [[1hhk|1hhk]], [[1hla|1hla]], [[1i1f|1i1f]], [[1i1y|1i1y]], [[1i4f|1i4f]], [[1i7r|1i7r]], [[1i7t|1i7t]], [[1i7u|1i7u]], [[1im3|1im3]], [[1jf1|1jf1]], [[1jht|1jht]], [[1lp9|1lp9]], [[1oga|1oga]], [[1p7q|1p7q]], [[1qew|1qew]], [[1qr1|1qr1]], [[1qrn|1qrn]], [[1qse|1qse]], [[1qsf|1qsf]], [[1s8d|1s8d]], [[1s9w|1s9w]], [[1s9x|1s9x]], [[1s9y|1s9y]], [[1t1w|1t1w]], [[1t1x|1t1x]], [[1t1y|1t1y]], [[1t1z|1t1z]], [[1t20|1t20]], [[1t21|1t21]], [[1t22|1t22]], [[1tvb|1tvb]], [[1tvh|1tvh]], [[1ur7|1ur7]], [[2av1|2av1]], [[2av7|2av7]], [[2bnq|2bnq]], [[2bnr|2bnr]], [[2bsu|2bsu]], [[2bsv|2bsv]], [[2c7u|2c7u]], [[2clr|2clr]], [[2gj6|2gj6]], [[2jcc|2jcc]], [[2uwe|2uwe]], [[3hla|3hla]], [[1a1m|1a1m]], [[1a1n|1a1n]], [[1a1o|1a1o]], [[1a6z|1a6z]], [[1a9b|1a9b]], [[1a9e|1a9e]], [[1agb|1agb]], [[1agc|1agc]], [[1agd|1agd]], [[1age|1age]], [[1agf|1agf]], [[1c16|1c16]], [[1ce6|1ce6]], [[1cg9|1cg9]], [[1de4|1de4]], [[1e27|1e27]], [[1e28|1e28]], [[1efx|1efx]], [[1exu|1exu]], [[1gzp|1gzp]], [[1gzq|1gzq]], [[1hsa|1hsa]], [[1hsb|1hsb]], [[1im9|1im9]], [[1jgd|1jgd]], [[1jge|1jge]], [[1jnj|1jnj]], [[1k5n|1k5n]], [[1kpr|1kpr]], [[1ktl|1ktl]], [[1lds|1lds]], [[1m05|1m05]], [[1m6o|1m6o]], [[1mhe|1mhe]], [[1mi5|1mi5]], [[1n2r|1n2r]], [[1of2|1of2]], [[1ogt|1ogt]], [[1onq|1onq]], [[1py4|1py4]], [[1q94|1q94]], [[1qlf|1qlf]], [[1qqd|1qqd]], [[1qvo|1qvo]], [[1r3h|1r3h]], [[1sys|1sys]], [[1syv|1syv]], [[1tmc|1tmc]], [[1uqs|1uqs]], [[1uxs|1uxs]], [[1uxw|1uxw]], [[1vgk|1vgk]], [[1w0v|1w0v]], [[1w0w|1w0w]], [[1w72|1w72]], [[1x7q|1x7q]], [[1xh3|1xh3]], [[1xr8|1xr8]], [[1xr9|1xr9]], [[1xz0|1xz0]], [[1ydp|1ydp]], [[1ypz|1ypz]], [[1zs8|1zs8]], [[1zsd|1zsd]], [[1zt4|1zt4]], [[2a83|2a83]], [[2ak4|2ak4]], [[2axf|2axf]], [[2axg|2axg]], [[2bck|2bck]], [[2bsr|2bsr]], [[2bss|2bss]], [[2bst|2bst]], [[2bvq|2bvq]], [[2cii|2cii]], [[2cik|2cik]], [[2d31|2d31]], [[2esv|2esv]], [[2f74|2f74]], [[2f8o|2f8o]], [[2h26|2h26]], [[2hjk|2hjk]], [[2hjl|2hjl]], [[2hla|2hla]], [[2v2x|2v2x]]</td></tr>
<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2v2w FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2v2w OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2v2w RCSB], [http://www.ebi.ac.uk/pdbsum/2v2w PDBsum]</span></td></tr>
<table>
== 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/v2/2v2w_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/chain_selection.php?pdb_ID=2ata ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
All thymically selected T cells are inherently cross-reactive, yet many data indicate a fine specificity in antigen recognition, which enables virus escape from immune control by mutation in infections such as the human immunodeficiency virus (HIV). To address this paradox, we analyzed the fine specificity of T cells recognizing a human histocompatibility leukocyte antigen (HLA)-A2-restricted, strongly immunodominant, HIV gag epitope (SLFNTVATL). The majority of 171 variant peptides tested bound HLA-A2, but only one third were recognized. Surprisingly, one recognized variant (SLYNTVATL) showed marked differences in structure when bound to HLA-A2. T cell receptor (TCR) recognition of variants of these two peptides implied that they adopted the same conformation in the TCR-peptide-major histocompatibility complex (MHC) complex. However, the on-rate kinetics of TCR binding were identical, implying that conformational changes at the TCR-peptide-MHC binding interface occur after an initial permissive antigen contact. These findings have implications for the rational design of vaccines targeting viruses with unstable genomes.


==Function==
T cell cross-reactivity and conformational changes during TCR engagement.,Lee JK, Stewart-Jones G, Dong T, Harlos K, Di Gleria K, Dorrell L, Douek DC, van der Merwe PA, Jones EY, McMichael AJ J Exp Med. 2004 Dec 6;200(11):1455-66. PMID:15583017<ref>PMID:15583017</ref>
[[http://www.uniprot.org/uniprot/1A02_HUMAN 1A02_HUMAN]] Involved in the presentation of foreign antigens to the immune system.


==About this Structure==
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
[[2v2w]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=2bsu 2bsu]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2V2W OCA].
</div>


==See Also==
==See Also==
*[[Beta-2 microglobulin|Beta-2 microglobulin]]
*[[Beta-2 microglobulin|Beta-2 microglobulin]]
*[[Major histocompatibility complex|Major histocompatibility complex]]
*[[Major histocompatibility complex|Major histocompatibility complex]]
 
== References ==
==Reference==
<references/>
<ref group="xtra">PMID:015583017</ref><references group="xtra"/><references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
[[Category: Dong, T.]]
[[Category: Dong, T.]]

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