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New page: left|200px<br /><applet load="1wbx" size="450" color="white" frame="true" align="right" spinBox="true" caption="1wbx, resolution 1.90Å" /> '''CRYSTAL STRUCTURES O... |
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== | ==CRYSTAL STRUCTURES OF MURINE MHC CLASS I H-2 Db AND Kb MOLECULES IN COMPLEX WITH CTL EPITOPES FROM INFLUENZA A VIRUS: IMPLICATIONS FOR TCR REPERTOIRE SELECTION AND IMMUNODOMINANCE== | ||
Cytotoxic T lymphocyte (CTL) responses against influenza A virus in | <StructureSection load='1wbx' size='340' side='right'caption='[[1wbx]], [[Resolution|resolution]] 1.90Å' scene=''> | ||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[1wbx]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Influenza_A_virus Influenza A virus] and [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1WBX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1WBX 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]] 1.9Å</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=1wbx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1wbx OCA], [https://pdbe.org/1wbx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1wbx RCSB], [https://www.ebi.ac.uk/pdbsum/1wbx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1wbx ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/HA11_MOUSE HA11_MOUSE] Involved in the presentation of foreign antigens to the immune system. | |||
== 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/wb/1wbx_consurf.spt"</scriptWhenChecked> | |||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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=1wbx ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Cytotoxic T lymphocyte (CTL) responses against influenza A virus in C57BL/6 mice are dominated by a small number of viral peptides among many that are capable of binding to major histocompatibility complex (MHC) class I molecules. The basis of this limited immune recognition is unknown. Here, we present X-ray structures of MHC class I molecules in complex with two immunodominant epitopes (PA(224-233)/D(b) and PB1(703-711)/K(b)) and one non-immunogenic epitope (HA(468-477)/D(b)) of the influenza A virus. The immunodominant peptides are each characterized by a bulge at the C terminus, lifting P6 and P7 residues out of the MHC groove, presenting featured structural elements to T-cell receptors (TCRs). Immune recognition of PA(224-233)/D(b) will focus largely on the exposed P7 arginine residue. In contrast, the non-immunogenic HA(468-477) peptide lacks prominent features in this C-terminal bulge. In the K(b)-bound PB1(703-711) epitope, the bulge results from a non-canonical binding motif, such that the mode of presentation of this peptide strongly resembles that of D(b)-bound peptides. Given that PA(224-233)/D(b), PB1(703-711)/K(b) and the previously defined NP(366-374)/D(b) epitopes dominate the primary response to influenza A virus in C57BL/6 mice, our findings indicate that residues of the C-terminal bulge are important in selection of the immunodominant CTL repertoire. | |||
Crystal structures of murine MHC Class I H-2 D(b) and K(b) molecules in complex with CTL epitopes from influenza A virus: implications for TCR repertoire selection and immunodominance.,Meijers R, Lai CC, Yang Y, Liu JH, Zhong W, Wang JH, Reinherz EL J Mol Biol. 2005 Feb 4;345(5):1099-110. Epub 2004 Dec 8. PMID:15644207<ref>PMID:15644207</ref> | |||
== | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | |||
<div class="pdbe-citations 1wbx" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Beta-2 microglobulin 3D structures|Beta-2 microglobulin 3D structures]] | |||
*[[MHC 3D structures|MHC 3D structures]] | |||
*[[MHC I 3D structures|MHC I 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Influenza A virus]] | |||
[[Category: Large Structures]] | |||
[[Category: Mus musculus]] | [[Category: Mus musculus]] | ||
[[Category: Lai C]] | |||
[[Category: Lai | [[Category: Liu J]] | ||
[[Category: Liu | [[Category: Meijers R]] | ||
[[Category: Meijers | [[Category: Reinherz EL]] | ||
[[Category: Reinherz | [[Category: Wang J]] | ||
[[Category: Wang | [[Category: Yang Y]] | ||
[[Category: Yang | [[Category: Zhong W]] | ||
[[Category: Zhong | |||
Latest revision as of 03:38, 21 November 2024
CRYSTAL STRUCTURES OF MURINE MHC CLASS I H-2 Db AND Kb MOLECULES IN COMPLEX WITH CTL EPITOPES FROM INFLUENZA A VIRUS: IMPLICATIONS FOR TCR REPERTOIRE SELECTION AND IMMUNODOMINANCECRYSTAL STRUCTURES OF MURINE MHC CLASS I H-2 Db AND Kb MOLECULES IN COMPLEX WITH CTL EPITOPES FROM INFLUENZA A VIRUS: IMPLICATIONS FOR TCR REPERTOIRE SELECTION AND IMMUNODOMINANCE
Structural highlights
FunctionHA11_MOUSE Involved in the presentation of foreign antigens to the immune system. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedCytotoxic T lymphocyte (CTL) responses against influenza A virus in C57BL/6 mice are dominated by a small number of viral peptides among many that are capable of binding to major histocompatibility complex (MHC) class I molecules. The basis of this limited immune recognition is unknown. Here, we present X-ray structures of MHC class I molecules in complex with two immunodominant epitopes (PA(224-233)/D(b) and PB1(703-711)/K(b)) and one non-immunogenic epitope (HA(468-477)/D(b)) of the influenza A virus. The immunodominant peptides are each characterized by a bulge at the C terminus, lifting P6 and P7 residues out of the MHC groove, presenting featured structural elements to T-cell receptors (TCRs). Immune recognition of PA(224-233)/D(b) will focus largely on the exposed P7 arginine residue. In contrast, the non-immunogenic HA(468-477) peptide lacks prominent features in this C-terminal bulge. In the K(b)-bound PB1(703-711) epitope, the bulge results from a non-canonical binding motif, such that the mode of presentation of this peptide strongly resembles that of D(b)-bound peptides. Given that PA(224-233)/D(b), PB1(703-711)/K(b) and the previously defined NP(366-374)/D(b) epitopes dominate the primary response to influenza A virus in C57BL/6 mice, our findings indicate that residues of the C-terminal bulge are important in selection of the immunodominant CTL repertoire. Crystal structures of murine MHC Class I H-2 D(b) and K(b) molecules in complex with CTL epitopes from influenza A virus: implications for TCR repertoire selection and immunodominance.,Meijers R, Lai CC, Yang Y, Liu JH, Zhong W, Wang JH, Reinherz EL J Mol Biol. 2005 Feb 4;345(5):1099-110. Epub 2004 Dec 8. PMID:15644207[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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