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| | ==Crystal structure of TK3 TCR-HLA-B*35:08-HPVG-D5 complex== | | ==Crystal structure of TK3 TCR-HLA-B*35:08-HPVG-D5 complex== |
| - | <StructureSection load='4prh' size='340' side='right' caption='[[4prh]], [[Resolution|resolution]] 2.50Å' scene=''> | + | <StructureSection load='4prh' size='340' side='right'caption='[[4prh]], [[Resolution|resolution]] 2.50Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4prh]] is a 5 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4PRH OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4PRH FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4prh]] is a 5 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Human_gammaherpesvirus_4 Human gammaherpesvirus 4]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4PRH OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4PRH FirstGlance]. <br> |
| - | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4pr5|4pr5]], [[4pra|4pra]], [[4prb|4prb]], [[4prd|4prd]], [[4pre|4pre]], [[4pri|4pri]], [[4prn|4prn]], [[4prp|4prp]]</td></tr> | + | </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=4prh FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4prh OCA], [https://pdbe.org/4prh PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4prh RCSB], [https://www.ebi.ac.uk/pdbsum/4prh PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4prh ProSAT]</span></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">HLA-B ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN]), B2M, CDABP0092, HDCMA22P ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
| + | |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4prh FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4prh OCA], [http://pdbe.org/4prh PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4prh RCSB], [http://www.ebi.ac.uk/pdbsum/4prh PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4prh ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| - | == Disease == | |
| - | [[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> | |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/C5MK56_HUMAN C5MK56_HUMAN]] Involved in the presentation of foreign antigens to the immune system (By similarity).[SAAS:SAAS003006_004_004364] [[http://www.uniprot.org/uniprot/EBNA1_EBVG EBNA1_EBVG]] Plays an essential role in replication and partitioning of viral genomic DNA during latent viral infection. During this phase, the circular double-stranded viral DNA undergoes replication once per cell cycle and is efficiently partitioned to the daughter cells. EBNA1 activates the initiation of viral DNA replication through binding to specific sites in the viral latent origin of replication, oriP. Additionally, it governs the segregation of viral episomes by mediating their attachment to host cell metaphase chromosomes. Also activates the transcription of several viral latency genes. Finally, it can counteract the stabilization of host p53/TP53 by host USP7, thereby decreasing apoptosis and increasing host cell survival (By similarity). [[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. | + | [https://www.uniprot.org/uniprot/C5MK56_HUMAN C5MK56_HUMAN] Involved in the presentation of foreign antigens to the immune system (By similarity).[SAAS:SAAS003006_004_004364] |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | ==See Also== | | ==See Also== |
| - | *[[Beta-2 microglobulin|Beta-2 microglobulin]] | + | *[[Beta-2 microglobulin 3D structures|Beta-2 microglobulin 3D structures]] |
| - | *[[T-cell receptor|T-cell receptor]] | + | *[[T-cell receptor 3D structures|T-cell receptor 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Human]] | + | [[Category: Homo sapiens]] |
| - | [[Category: Chih, L Yu]]
| + | [[Category: Human gammaherpesvirus 4]] |
| - | [[Category: Gras, S]]
| + | [[Category: Large Structures]] |
| - | [[Category: Rossjohn, J]]
| + | [[Category: Gras S]] |
| - | [[Category: Epstein-barr virus]]
| + | [[Category: Rossjohn J]] |
| - | [[Category: Human leukocyte antigen class i]] | + | [[Category: Yu Chih L]] |
| - | [[Category: Immune system]] | + | |
| - | [[Category: T cell receptor]] | + | |
| - | [[Category: Viral escape]] | + | |
| - | [[Category: Viral immunity]] | + | |
| Structural highlights
Function
C5MK56_HUMAN Involved in the presentation of foreign antigens to the immune system (By similarity).[SAAS:SAAS003006_004_004364]
Publication Abstract from PubMed
Mutations within T cell epitopes represent a common mechanism of viral escape from the host protective immune response. The diverse T cell repertoire and the extensive human leukocyte antigen (HLA) polymorphism across populations is the evolutionary response to viral mutation. However, the molecular basis underpinning the interplay between HLA polymorphism, the T cell repertoire, and viral escape is unclear. Here we investigate the T cell response to a HLA-B*35:01- and HLA-B*35:08-restricted 407HPVGEADYFEY417 epitope from Epstein-Barr virus and naturally occurring variants at positions 4 and 5 thereof. Each viral variant differently impacted on the epitope's flexibility and conformation when bound to HLA-B*35:08 or HLA-B*35:01. We provide a molecular basis for understanding how the single residue polymorphism that discriminates between HLA-B*35:01/08 profoundly impacts on T cell receptor recognition. Surprisingly, one viral variant (P5-Glu to P5-Asp) effectively changed restriction preference from HLA-B*35:01 to HLA-B*35:08. Collectively, our study portrays the interplay between the T cell response, viral escape, and HLA polymorphism, whereby HLA polymorphism enables altered presentation of epitopes from different strains of Epstein-Barr virus.
A Molecular Basis for the Interplay between T Cells, Viral Mutants, and Human Leukocyte Antigen Micropolymorphism.,Liu YC, Chen Z, Neller MA, Miles JJ, Purcell AW, McCluskey J, Burrows SR, Rossjohn J, Gras S J Biol Chem. 2014 Jun 13;289(24):16688-16698. Epub 2014 Apr 23. PMID:24759101[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Liu YC, Chen Z, Neller MA, Miles JJ, Purcell AW, McCluskey J, Burrows SR, Rossjohn J, Gras S. A Molecular Basis for the Interplay between T Cells, Viral Mutants, and Human Leukocyte Antigen Micropolymorphism. J Biol Chem. 2014 Jun 13;289(24):16688-16698. Epub 2014 Apr 23. PMID:24759101 doi:http://dx.doi.org/10.1074/jbc.M114.563502
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