View source for 6x00


==Structure of DbNA(11) peptides bound to H-2Db MHC-I==
<StructureSection load='6x00' size='340' side='right'caption='[[6x00]], [[Resolution|resolution]] 1.55&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6x00]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens], [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=6X00 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6X00 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]] 1.55&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=6x00 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6x00 OCA], [https://pdbe.org/6x00 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6x00 RCSB], [https://www.ebi.ac.uk/pdbsum/6x00 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6x00 ProSAT]</span></td></tr>
</table>
== Disease ==
[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> 
== Function ==
[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.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The presentation of pathogen-derived peptides on MHC class I molecules is essential for the initiation of adaptive CD8(+) T cell immunity, which in turn is critical for effective control of many significant human infections. The identification of immunogenic pathogen-derived epitopes and a detailed understanding of how they are recognized by TCRs is essential for the design of effective T cell-based vaccines. In this study, we have characterized the T cell recognition and immune responses in mice to two naturally presented influenza A virus-derived peptides previously identified from virally infected cells via mass spectrometry. These neuraminidase-derived peptides, NA181-190 (SGPDNGAVAV) and NA181-191 (SGPDNGAVAVL), are completely overlapping with the exception of a 1 aa extension at the C terminus of the longer peptide. This minor peptidic difference results in the induction of two completely independent and non-cross-reactive T cell populations that show distinct functional characteristics after influenza A virus infection of B6 mice. We show that the unique TCR reactivity to the overlapping peptides is present in the naive repertoire prior to immune expansion in B6 mice. Moreover, we provide a structural explanation underlying the distinct CD8(+) T cell reactivities, which reinforces the concept that peptide length is a key determinant of Ag specificity in CD8(+) T cell responses.

Overlapping Peptides Elicit Distinct CD8(+) T Cell Responses following Influenza A Virus Infection.,Assmus LM, Guan J, Wu T, Farenc C, Sng XYX, Zareie P, Nguyen A, Nguyen AT, Tscharke DC, Thomas PG, Rossjohn J, Gras S, Croft NP, Purcell AW, La Gruta NL J Immunol. 2020 Aug 31. pii: jimmunol.2000689. doi: 10.4049/jimmunol.2000689. PMID:32868409<ref>PMID:32868409</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6x00" style="background-color:#fffaf0;"></div>

==See Also==
*[[MHC 3D structures|MHC 3D structures]]
*[[MHC I 3D structures|MHC I 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Influenza A virus]]
[[Category: Large Structures]]
[[Category: Mus musculus]]
[[Category: Farenc C]]
[[Category: Rossjohn J]]