2esv

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[[Image:2esv.gif|left|200px]]
 
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{{Structure
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==Structure of the HLA-E-VMAPRTLIL/KK50.4 TCR complex==
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|PDB= 2esv |SIZE=350|CAPTION= <scene name='initialview01'>2esv</scene>, resolution 2.600&Aring;
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<StructureSection load='2esv' size='340' side='right'caption='[[2esv]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
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|SITE=
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== Structural highlights ==
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|LIGAND= <scene name='pdbligand=IOD:IODIDE ION'>IOD</scene>
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<table><tr><td colspan='2'>[[2esv]] is a 5 chain structure with sequence from [https://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2ESV OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2ESV FirstGlance]. <br>
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|ACTIVITY=
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=IOD:IODIDE+ION'>IOD</scene></td></tr>
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|GENE=
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2esv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2esv OCA], [https://pdbe.org/2esv PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2esv RCSB], [https://www.ebi.ac.uk/pdbsum/2esv PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2esv ProSAT]</span></td></tr>
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}}
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</table>
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== Disease ==
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'''Structure of the HLA-E-VMAPRTLIL/KK50.4 TCR complex'''
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[[https://www.uniprot.org/uniprot/B2MG_HUMAN B2MG_HUMAN]] Defects in B2M are the cause of hypercatabolic hypoproteinemia (HYCATHYP) [MIM:[https://omim.org/entry/241600 241600]]. Affected individuals show marked reduction in serum concentrations of immunoglobulin and albumin, probably due to rapid degradation.<ref>PMID:16549777</ref> Note=Beta-2-microglobulin may adopt the fibrillar configuration of amyloid in certain pathologic states. The capacity to assemble into amyloid fibrils is concentration dependent. Persistently high beta(2)-microglobulin serum levels lead to amyloidosis in patients on long-term hemodialysis.<ref>PMID:3532124</ref> <ref>PMID:1336137</ref> <ref>PMID:7554280</ref> <ref>PMID:4586824</ref> <ref>PMID:8084451</ref> <ref>PMID:12119416</ref> <ref>PMID:12796775</ref> <ref>PMID:16901902</ref> <ref>PMID:16491088</ref> <ref>PMID:17646174</ref> <ref>PMID:18835253</ref> <ref>PMID:18395224</ref> <ref>PMID:19284997</ref>
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== Function ==
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[[https://www.uniprot.org/uniprot/HLAE_HUMAN HLAE_HUMAN]] Preferably binds to a peptide derived from the signal sequence of most HLA-A, -B, -C and -G molecules. [[https://www.uniprot.org/uniprot/B2MG_HUMAN B2MG_HUMAN]] Component of the class I major histocompatibility complex (MHC). Involved in the presentation of peptide antigens to the immune system.
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==Overview==
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/es/2esv_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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=2esv ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
In contrast to antigen-specific immunity orchestrated by major histocompatibility complex (MHC) class Ia molecules, the ancestrally related nonclassical MHC class Ib molecules generally mediate innate immune responses. Here we have demonstrated the structural basis by which the MHC class Ib molecule HLA-E mediates an adaptive MHC-restricted cytotoxic T lymphocyte response to human cytomegalovirus. Highly constrained by host genetics, the response showed notable fine specificity for position 8 of the viral peptide, which is the sole discriminator of self versus nonself. Despite the evolutionary divergence of MHC class Ia and class Ib molecules, the structure of the T cell receptor-MHC class Ib complex was very similar to that of conventional T cell receptor-MHC class Ia complexes. These results emphasize the evolutionary 'ambiguity' of HLA-E, which not only interacts with innate immune receptors but also has the functional capacity to mediate virus-specific cytotoxic T lymphocyte responses during adaptive immunity.
In contrast to antigen-specific immunity orchestrated by major histocompatibility complex (MHC) class Ia molecules, the ancestrally related nonclassical MHC class Ib molecules generally mediate innate immune responses. Here we have demonstrated the structural basis by which the MHC class Ib molecule HLA-E mediates an adaptive MHC-restricted cytotoxic T lymphocyte response to human cytomegalovirus. Highly constrained by host genetics, the response showed notable fine specificity for position 8 of the viral peptide, which is the sole discriminator of self versus nonself. Despite the evolutionary divergence of MHC class Ia and class Ib molecules, the structure of the T cell receptor-MHC class Ib complex was very similar to that of conventional T cell receptor-MHC class Ia complexes. These results emphasize the evolutionary 'ambiguity' of HLA-E, which not only interacts with innate immune receptors but also has the functional capacity to mediate virus-specific cytotoxic T lymphocyte responses during adaptive immunity.
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==Disease==
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Structural basis for a major histocompatibility complex class Ib-restricted T cell response.,Hoare HL, Sullivan LC, Pietra G, Clements CS, Lee EJ, Ely LK, Beddoe T, Falco M, Kjer-Nielsen L, Reid HH, McCluskey J, Moretta L, Rossjohn J, Brooks AG Nat Immunol. 2006 Mar;7(3):256-64. Epub 2006 Feb 12. PMID:16474394<ref>PMID:16474394</ref>
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Known disease associated with this structure: Hypoproteinemia, hypercatabolic OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=109700 109700]]
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==About this Structure==
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2ESV is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2ESV OCA].
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==Reference==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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Structural basis for a major histocompatibility complex class Ib-restricted T cell response., Hoare HL, Sullivan LC, Pietra G, Clements CS, Lee EJ, Ely LK, Beddoe T, Falco M, Kjer-Nielsen L, Reid HH, McCluskey J, Moretta L, Rossjohn J, Brooks AG, Nat Immunol. 2006 Mar;7(3):256-64. Epub 2006 Feb 12. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16474394 16474394]
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</div>
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[[Category: Homo sapiens]]
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<div class="pdbe-citations 2esv" style="background-color:#fffaf0;"></div>
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[[Category: Protein complex]]
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[[Category: Hoare, H L.]]
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[[Category: Rossjohn, J.]]
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[[Category: IOD]]
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[[Category: cmv]]
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[[Category: hla-e]]
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[[Category: pmhc/tcr complex]]
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[[Category: t cell receptor]]
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[[Category: tcr]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 16:44:00 2008''
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==See Also==
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*[[Beta-2 microglobulin 3D structures|Beta-2 microglobulin 3D structures]]
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*[[MHC 3D structures|MHC 3D structures]]
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*[[T-cell receptor 3D structures|T-cell receptor 3D structures]]
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== References ==
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<references/>
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__TOC__
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</StructureSection>
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[[Category: Human]]
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[[Category: Large Structures]]
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[[Category: Hoare, H L]]
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[[Category: Rossjohn, J]]
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[[Category: Cmv]]
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[[Category: Hla-e]]
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[[Category: Immune system]]
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[[Category: Pmhc-tcr complex]]
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[[Category: T cell receptor]]
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[[Category: Tcr]]

Current revision

Structure of the HLA-E-VMAPRTLIL/KK50.4 TCR complex

PDB ID 2esv

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