3mro

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{{STRUCTURE_3mro| PDB=3mro | SCENE= }}
 
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===Crystal Structure of MHC class I HLA-A2 molecule complexed with Melan-A MART1 decapeptide variant===
 
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==Disease==
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==Crystal Structure of MHC class I HLA-A2 molecule complexed with Melan-A MART1 decapeptide variant==
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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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<StructureSection load='3mro' size='340' side='right'caption='[[3mro]], [[Resolution|resolution]] 2.35&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[3mro]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3MRO OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3MRO FirstGlance]. <br>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.35&#8491;</td></tr>
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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=3mro FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3mro OCA], [https://pdbe.org/3mro PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3mro RCSB], [https://www.ebi.ac.uk/pdbsum/3mro PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3mro ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/MAR1_HUMAN MAR1_HUMAN] Involved in melanosome biogenesis by ensuring the stability of GPR143. Plays a vital role in the expression, stability, trafficking, and processing of melanocyte protein PMEL, which is critical to the formation of stage II melanosomes.<ref>PMID:15695812</ref> <ref>PMID:19717472</ref>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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The structural rules governing peptide/MHC (pMHC) recognition by T cells remain unclear. To address this question, we performed a structural characterization of several HLA-A2/peptide complexes and assessed in parallel their antigenicity, by analyzing the frequency of the corresponding Ag-specific naive T cells in A2(+) and A2(-) individuals, as well as within CD4(+) and CD8(+) subsets. We were able to find a correlation between specific naive T cell frequency and peptide solvent accessibility and/or mobility for a subset of moderately prominent peptides. However, one single structural parameter of the pMHC complexes could not be identified to explain each peptide antigenicity. Enhanced pMHC antigenicity was associated with both highly biased TRAV usage, possibly reflecting favored interaction between particular pMHC complexes and germline TRAV loops, and peptide structural features allowing interactions with a broad range of permissive CDR3 loops. In this context of constrained TCR docking mode, an optimal peptide solvent exposed surface leading to an optimal complementarity with TCR interface may constitute one of the key features leading to high frequency of specific T cells. Altogether our results suggest that frequency of specific T cells depends on the fine-tuning of several parameters, the structural determinants governing TCR-pMHC interaction being just one of them.
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==Function==
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Analysis of relationships between peptide/MHC structural features and naive T cell frequency in humans.,Reiser JB, Legoux F, Gras S, Trudel E, Chouquet A, Leger A, Le Gorrec M, Machillot P, Bonneville M, Saulquin X, Housset D J Immunol. 2014 Dec 15;193(12):5816-26. doi: 10.4049/jimmunol.1303084. Epub 2014 , Nov 12. PMID:25392532<ref>PMID:25392532</ref>
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[[http://www.uniprot.org/uniprot/1A02_HUMAN 1A02_HUMAN]] Involved in the presentation of foreign antigens to the immune system. [[http://www.uniprot.org/uniprot/MAR1_HUMAN MAR1_HUMAN]] Involved in melanosome biogenesis by ensuring the stability of GPR143. Plays a vital role in the expression, stability, trafficking, and processing of melanocyte protein PMEL, which is critical to the formation of stage II melanosomes.<ref>PMID:15695812</ref><ref>PMID:19717472</ref> [[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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==About this Structure==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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[[3mro]] is a 3 chain structure with sequence 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=3MRO OCA].
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</div>
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<div class="pdbe-citations 3mro" style="background-color:#fffaf0;"></div>
==See Also==
==See Also==
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*[[Beta-2 microglobulin|Beta-2 microglobulin]]
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*[[Beta-2 microglobulin 3D structures|Beta-2 microglobulin 3D structures]]
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*[[Major histocompatibility complex|Major histocompatibility complex]]
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== References ==
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<references/>
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==Reference==
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__TOC__
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<references group="xtra"/><references/>
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
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[[Category: Bonneville, M.]]
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[[Category: Large Structures]]
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[[Category: Chouquet, A.]]
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[[Category: Bonneville M]]
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[[Category: Debeaupuis, E.]]
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[[Category: Chouquet A]]
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[[Category: Echasserieau, K.]]
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[[Category: Debeaupuis E]]
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[[Category: Gorrec, M Le.]]
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[[Category: Echasserieau K]]
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[[Category: Housset, D.]]
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[[Category: Housset D]]
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[[Category: Reiser, J B.]]
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[[Category: Le Gorrec M]]
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[[Category: Saulquin, X.]]
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[[Category: Reiser J-B]]
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[[Category: Decapeptide]]
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[[Category: Saulquin X]]
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[[Category: Hla]]
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[[Category: Immune response]]
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[[Category: Immune system]]
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[[Category: Mart1]]
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[[Category: Melan-a]]
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[[Category: Mhc class i]]
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[[Category: Tumoral peptide]]
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Current revision

Crystal Structure of MHC class I HLA-A2 molecule complexed with Melan-A MART1 decapeptide variant

PDB ID 3mro

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