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| | ==Crystal structure of autoreactive-Valpha14-Vbeta6 NKT TCR in complex with CD1d-isoglobotrihexosylceramide== | | ==Crystal structure of autoreactive-Valpha14-Vbeta6 NKT TCR in complex with CD1d-isoglobotrihexosylceramide== |
| - | <StructureSection load='3scm' size='340' side='right' caption='[[3scm]], [[Resolution|resolution]] 2.50Å' scene=''> | + | <StructureSection load='3scm' size='340' side='right'caption='[[3scm]], [[Resolution|resolution]] 2.50Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3scm]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [http://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3SCM OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3SCM FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3scm]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] 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=3SCM OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3SCM FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=LGN:N-[(2S,3R,4E)-1-{[ALPHA-D-GALACTOPYRANOSYL-(1- 3)-BETA-D-GALACTOPYRANOSYL-(1- 4)-BETA-D-GLUCOPYRANOSYL]OXY}-3-HYDROXYOCTADEC-4-EN-2-YL]HEXACOSANAMIDE'>LGN</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.5Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3sda|3sda]], [[3sdc|3sdc]], [[3sdd|3sdd]], [[3sdx|3sdx]]</td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=LGN:N-[(2S,3R,4E)-1-{[ALPHA-D-GALACTOPYRANOSYL-(1- 3)-BETA-D-GALACTOPYRANOSYL-(1- 4)-BETA-D-GLUCOPYRANOSYL]OXY}-3-HYDROXYOCTADEC-4-EN-2-YL]HEXACOSANAMIDE'>LGN</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Cd1d1, Cd1.1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 Mus musculus]), B2m ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 Mus musculus])</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=3scm FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3scm OCA], [https://pdbe.org/3scm PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3scm RCSB], [https://www.ebi.ac.uk/pdbsum/3scm PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3scm ProSAT]</span></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=3scm FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3scm OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3scm RCSB], [http://www.ebi.ac.uk/pdbsum/3scm PDBsum]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/CD1D1_MOUSE CD1D1_MOUSE]] Antigen-presenting protein that binds self and non-self glycolipids and presents them to T-cell receptors on natural killer T-cells.<ref>PMID:11754812</ref> <ref>PMID:16314439</ref> <ref>PMID:16007091</ref> [[http://www.uniprot.org/uniprot/B2MG_MOUSE B2MG_MOUSE]] 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/CD1D1_MOUSE CD1D1_MOUSE] Antigen-presenting protein that binds self and non-self glycolipids and presents them to T-cell receptors on natural killer T-cells.<ref>PMID:11754812</ref> <ref>PMID:16314439</ref> <ref>PMID:16007091</ref> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> |
| | </div> | | </div> |
| | + | <div class="pdbe-citations 3scm" style="background-color:#fffaf0;"></div> |
| | | | |
| | ==See Also== | | ==See Also== |
| - | *[[Beta-2 microglobulin|Beta-2 microglobulin]] | + | *[[Beta-2 microglobulin 3D structures|Beta-2 microglobulin 3D structures]] |
| | *[[CD1|CD1]] | | *[[CD1|CD1]] |
| - | *[[T-cell receptor|T-cell receptor]] | + | *[[T-cell receptor 3D structures|T-cell receptor 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
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| | </StructureSection> | | </StructureSection> |
| | [[Category: Homo sapiens]] | | [[Category: Homo sapiens]] |
| | + | [[Category: Large Structures]] |
| | [[Category: Mus musculus]] | | [[Category: Mus musculus]] |
| - | [[Category: Clarke, A J]] | + | [[Category: Clarke AJ]] |
| - | [[Category: Rossjohn, J]] | + | [[Category: Rossjohn J]] |
| - | [[Category: Apc cell surface]]
| + | |
| - | [[Category: Immune system]]
| + | |
| - | [[Category: Immunity]]
| + | |
| - | [[Category: Ternary complex]]
| + | |
| Structural highlights
Function
CD1D1_MOUSE Antigen-presenting protein that binds self and non-self glycolipids and presents them to T-cell receptors on natural killer T-cells.[1] [2] [3]
Publication Abstract from PubMed
The most potent foreign antigens for natural killer T cells (NKT cells) are alpha-linked glycolipids, whereas NKT cell self-reactivity involves weaker recognition of structurally distinct beta-linked glycolipid antigens. Here we provide the mechanism for the autoreactivity of T cell antigen receptors (TCRs) on NKT cells to the mono- and tri-glycosylated beta-linked agonists beta-galactosylceramide (beta-GalCer) and isoglobotrihexosylceramide (iGb3), respectively. In binding these disparate antigens, the NKT cell TCRs docked onto CD1d similarly, achieving this by flattening the conformation of the beta-linked ligands regardless of the size of the glycosyl head group. Unexpectedly, the antigenicity of iGb3 was attributable to its terminal sugar group making compensatory interactions with CD1d. Thus, the NKT cell TCR molds the beta-linked self ligands to resemble the conformation of foreign alpha-linked ligands, which shows that induced-fit molecular mimicry can underpin the self-reactivity of NKT cell TCRs to beta-linked antigens.
Recognition of beta-linked self glycolipids mediated by natural killer T cell antigen receptors.,Pellicci DG, Clarke AJ, Patel O, Mallevaey T, Beddoe T, Le Nours J, Uldrich AP, McCluskey J, Besra GS, Porcelli SA, Gapin L, Godfrey DI, Rossjohn J Nat Immunol. 2011 Jul 31;12(9):827-33. doi: 10.1038/ni.2076. PMID:21804559[4]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Jayawardena-Wolf J, Benlagha K, Chiu YH, Mehr R, Bendelac A. CD1d endosomal trafficking is independently regulated by an intrinsic CD1d-encoded tyrosine motif and by the invariant chain. Immunity. 2001 Dec;15(6):897-908. PMID:11754812
- ↑ Zajonc DM, Maricic I, Wu D, Halder R, Roy K, Wong CH, Kumar V, Wilson IA. Structural basis for CD1d presentation of a sulfatide derived from myelin and its implications for autoimmunity. J Exp Med. 2005 Dec 5;202(11):1517-26. Epub 2005 Nov 28. PMID:16314439 doi:10.1084/jem.20051625
- ↑ Zajonc DM, Cantu C 3rd, Mattner J, Zhou D, Savage PB, Bendelac A, Wilson IA, Teyton L. Structure and function of a potent agonist for the semi-invariant natural killer T cell receptor. Nat Immunol. 2005 Aug;6(8):810-8. Epub 2005 Jul 10. PMID:16007091 doi:10.1038/ni1224
- ↑ Pellicci DG, Clarke AJ, Patel O, Mallevaey T, Beddoe T, Le Nours J, Uldrich AP, McCluskey J, Besra GS, Porcelli SA, Gapin L, Godfrey DI, Rossjohn J. Recognition of beta-linked self glycolipids mediated by natural killer T cell antigen receptors. Nat Immunol. 2011 Jul 31;12(9):827-33. doi: 10.1038/ni.2076. PMID:21804559 doi:10.1038/ni.2076
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