6m2k

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==Uncommon structural features of rabbit MHC class I (RLA-A1) complexed with rabbit haemorrhagic disease virus (RHDV) derived peptide, VP60-10==
==Uncommon structural features of rabbit MHC class I (RLA-A1) complexed with rabbit haemorrhagic disease virus (RHDV) derived peptide, VP60-10==
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<StructureSection load='6m2k' size='340' side='right'caption='[[6m2k]]' scene=''>
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<StructureSection load='6m2k' size='340' side='right'caption='[[6m2k]], [[Resolution|resolution]] 2.59&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6M2K OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=6M2K FirstGlance]. <br>
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<table><tr><td colspan='2'>[[6m2k]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/European_rabbit European rabbit] and [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6M2K OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=6M2K FirstGlance]. <br>
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</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=6m2k FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6m2k OCA], [http://pdbe.org/6m2k PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6m2k RCSB], [http://www.ebi.ac.uk/pdbsum/6m2k PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6m2k ProSAT]</span></td></tr>
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</td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">B2M ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=6m2k FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6m2k OCA], [http://pdbe.org/6m2k PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6m2k RCSB], [http://www.ebi.ac.uk/pdbsum/6m2k PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6m2k ProSAT]</span></td></tr>
</table>
</table>
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== Disease ==
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[[http://www.uniprot.org/uniprot/B2MG_HUMAN B2MG_HUMAN]] Defects in B2M are the cause of hypercatabolic hypoproteinemia (HYCATHYP) [MIM:[http://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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[[http://www.uniprot.org/uniprot/HA1B_RABIT HA1B_RABIT]] Involved in the presentation of foreign antigens to the immune system. [[http://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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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Rabbits are pivotal domestic animals for both the economy and as an animal model for human diseases. A large number of rabbits have been infected by rabbit hemorrhagic disease virus (RHDV) in natural and artificial pandemics in the past. Differences in presentation of antigenic peptides by polymorphic major histocompatibility complex (MHC) molecules to T-cell receptors (TCR) on T lymphocytes are associated with viral clearance in mammals. Herein, we screened and identified a series of peptides derived from RHDV binding to the rabbit MHC class I molecule, RLA-A1. The small, hydrophobic B and F pockets of RLA-A1 capture a peptide motif analogous to that recognized by human class I molecule HLA-A*0201, with more restricted aliphatic anchors at P2 and POmega positions. Meanwhile, the rabbit molecule is featured with an uncommon residue combination of Gly53, Val55 and Glu56, making the 310 helix and the loop between the 310 and alpha1 helices closer to the alpha2 helix. A wider A pocket in RLA-A1 can induce a special conformation of the P1 anchor and may play a pivotal role in peptide assembly and TCR recognition. Our study broadens the knowledge on T-cell immunity in domestic animals and also provides useful insights for vaccine development to prevent infectious diseases in rabbits.IMPORTANCE We screened rabbit MHC class I RLA-A1-restricted peptides from the capsid protein VP60 of Rabbit haemorrhagic disease virus (RHDV) and determined the structures of RLA-A1 complexed with three peptides, VP60-1, VP60-2 and VP60-10. From the structures, we found that the peptide binding motifs of RLA-A1 are extremely constraining. Thus, there is a generally restricted peptide selection for RLA-A1 compared to human HLA-A*0201. In addition, uncommon residues Gly53, Val55 and Glu56 of RLA-A1 are located between 310 helix and alpha1 helix which makes the steric position of 310 helix in RLA-A1 much closer to the alpha2 helix than other mammalian MHC class I molecules. This special conformation between 310 helix and alpha1 helix plays a pivotal role in rabbit MHC class I assembly. Our results provide new insights into MHC class I molecule assembly and peptide presentation of domestic mammals. Furthermore, these data also broaden our knowledge on T-cell immunity in rabbits and may also provide useful information for vaccine development to prevent infectious diseases in rabbits.
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Strict assembly restriction of peptides from rabbit hemorrhagic disease virus presented by rabbit MHC class I molecule RLA-A1.,Zhang Q, Liu K, Yue C, Zhang D, Lu D, Xiao W, Liu P, Zhao Y, Gao G, Ding C, Lyu J, Liu WJ J Virol. 2020 Jun 10. pii: JVI.00396-20. doi: 10.1128/JVI.00396-20. PMID:32522857<ref>PMID:32522857</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 6m2k" style="background-color:#fffaf0;"></div>
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== References ==
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<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
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[[Category: European rabbit]]
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[[Category: Human]]
[[Category: Large Structures]]
[[Category: Large Structures]]
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[[Category: Ding CM]]
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[[Category: Ding, C M]]
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[[Category: Gao GL]]
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[[Category: Gao, G L]]
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[[Category: Liu KF]]
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[[Category: Liu, K F]]
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[[Category: Liu PP]]
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[[Category: Liu, P P]]
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[[Category: Liu WJ]]
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[[Category: Liu, W J]]
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[[Category: Lu D]]
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[[Category: Lu, D]]
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[[Category: Lyu JX]]
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[[Category: Lyu, J X]]
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[[Category: Xiao WL]]
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[[Category: Xiao, W L]]
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[[Category: Yue C]]
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[[Category: Yue, C]]
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[[Category: Zhang D]]
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[[Category: Zhang, D]]
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[[Category: Zhang QX]]
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[[Category: Zhang, Q X]]
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[[Category: Zhao YZ]]
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[[Category: Zhao, Y Z]]
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[[Category: Immune system]]
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[[Category: Mhc i complex]]
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[[Category: Vp60-10]]

Revision as of 07:01, 2 September 2020

Uncommon structural features of rabbit MHC class I (RLA-A1) complexed with rabbit haemorrhagic disease virus (RHDV) derived peptide, VP60-10

PDB ID 6m2k

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