6lt6: Difference between revisions
No edit summary |
No edit summary |
||
| Line 3: | Line 3: | ||
<StructureSection load='6lt6' size='340' side='right'caption='[[6lt6]], [[Resolution|resolution]] 2.15Å' scene=''> | <StructureSection load='6lt6' size='340' side='right'caption='[[6lt6]], [[Resolution|resolution]] 2.15Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[6lt6]] is a 2 chain structure with sequence from [ | <table><tr><td colspan='2'>[[6lt6]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Macaca_mulatta Macaca mulatta]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6LT6 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6LT6 FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=EKG:(2R)-2,3-dihydroxypropyl+hexadecanoate'>EKG</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene> | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.15Å</td></tr> | ||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=EKG:(2R)-2,3-dihydroxypropyl+hexadecanoate'>EKG</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</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=6lt6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6lt6 OCA], [https://pdbe.org/6lt6 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6lt6 RCSB], [https://www.ebi.ac.uk/pdbsum/6lt6 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6lt6 ProSAT]</span></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | |||
</table> | </table> | ||
== Function == | == Function == | ||
[ | [https://www.uniprot.org/uniprot/B2ZHY7_MACMU B2ZHY7_MACMU] | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
== Publication Abstract from PubMed == | == Publication Abstract from PubMed == | ||
| Line 20: | Line 19: | ||
</div> | </div> | ||
<div class="pdbe-citations 6lt6" style="background-color:#fffaf0;"></div> | <div class="pdbe-citations 6lt6" 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 == | ||
<references/> | <references/> | ||
| Line 25: | Line 29: | ||
</StructureSection> | </StructureSection> | ||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: | [[Category: Macaca mulatta]] | ||
[[Category: Morita | [[Category: Morita D]] | ||
[[Category: Shima | [[Category: Shima Y]] | ||
Revision as of 17:50, 29 November 2023
Crystal structure of rhesus macaque MHC class I molecule Mamu-B*05104 complexed with lysophosphatidylcholineCrystal structure of rhesus macaque MHC class I molecule Mamu-B*05104 complexed with lysophosphatidylcholine
Structural highlights
FunctionPublication Abstract from PubMedNewly synthesized major histocompatibility complex (MHC) class I proteins are stabilized in the endoplasmic reticulum (ER) by binding 8- to 10-mer-long self-peptide antigens that are provided by transporter associated with antigen processing (TAP). These MHC class I:peptide complexes then exit the ER and reach the plasma membrane, serving to sustain the steady state MHC class I expression on the cell surface. A novel subset of MHC class I molecules that preferentially bind lipid-containing ligands rather than conventional peptides was recently identified. The primate classical MHC class I allomorphs, Mamu-B*098 and Mamu-B*05104, are capable of binding the N-myristoylated 5-mer (C14-Gly-Gly-Ala-Ile-Ser) or 4-mer (C14-Gly-Gly-Ala-Ile) lipopeptides derived from the N-myristoylated SIV Nef protein, respectively, and of activating lipopeptide antigen-specific cytotoxic T lymphocytes. We herein demonstrate that Mamu-B*098 samples lysophosphatidylethanolamine and lysophosphatidylcholine containing up to a C20 fatty acid in the ER. The X-ray crystal structures of Mamu-B*098 and Mamu-B*05104 complexed with lysophospholipids at high resolution revealed that the B and D pockets in the antigen-binding grooves of these MHC class I molecules accommodate these lipids through a mono-acyl glycerol moiety. Consistent with the capacity to bind cellular lipid ligands, these two MHC class I molecules did not require TAP function for cell-surface expression. Collectively, these results indicate that peptide- and lipopeptide-presenting MHC class I subsets use distinct sources of endogenous ligands. Crystal structures of lysophospholipid-bound MHC class I molecules.,Shima Y, Morita D, Mizutani T, Mori N, Mikami B, Sugita M J Biol Chem. 2020 Apr 8. pii: RA119.011932. doi: 10.1074/jbc.RA119.011932. PMID:32269076[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
|
| ||||||||||||||||||