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| | ==Structure of the endogenous iNKT cell ligand iGb3 bound to mCD1d== | | ==Structure of the endogenous iNKT cell ligand iGb3 bound to mCD1d== |
| - | <StructureSection load='2q7y' size='340' side='right' caption='[[2q7y]], [[Resolution|resolution]] 1.95Å' scene=''> | + | <StructureSection load='2q7y' size='340' side='right'caption='[[2q7y]], [[Resolution|resolution]] 1.95Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2q7y]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Lk3_transgenic_mice Lk3 transgenic mice]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2Q7Y OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2Q7Y FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2q7y]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Lk3_transgenic_mice Lk3 transgenic mice]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2Q7Y OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2Q7Y FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=IGC:N-[(1S,2R,3E)-1-({[ALPHA-D-GALACTOPYRANOSYL-(1- 3)-BETA-D-GALACTOPYRANOSYL-(1- 4)-BETA-D-GLUCOPYRANOSYL]OXY}METHYL)-2-HYDROXYHEPTADEC-3-EN-1-YL]OCTANAMIDE'>IGC</scene>, <scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=PLM:PALMITIC+ACID'>PLM</scene></td></tr> | + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=IGC:N-[(1S,2R,3E)-1-({[ALPHA-D-GALACTOPYRANOSYL-(1- 3)-BETA-D-GALACTOPYRANOSYL-(1- 4)-BETA-D-GLUCOPYRANOSYL]OXY}METHYL)-2-HYDROXYHEPTADEC-3-EN-1-YL]OCTANAMIDE'>IGC</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=PLM:PALMITIC+ACID'>PLM</scene>, <scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</scene></td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1z5l|1z5l]], [[2akr|2akr]], [[2fik|2fik]], [[2gaz|2gaz]]</td></tr> | + | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1z5l|1z5l]], [[2akr|2akr]], [[2fik|2fik]], [[2gaz|2gaz]]</div></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 LK3 transgenic mice]), B2m ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 LK3 transgenic mice])</td></tr> | + | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Cd1d1, Cd1.1 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 LK3 transgenic mice]), B2m ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 LK3 transgenic mice])</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=2q7y FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2q7y OCA], [http://pdbe.org/2q7y PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2q7y RCSB], [http://www.ebi.ac.uk/pdbsum/2q7y PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2q7y ProSAT]</span></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=2q7y FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2q7y OCA], [https://pdbe.org/2q7y PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2q7y RCSB], [https://www.ebi.ac.uk/pdbsum/2q7y PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2q7y ProSAT]</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> [[https://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. |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | ==See Also== | | ==See Also== |
| - | *[[Beta-2 microglobulin|Beta-2 microglobulin]] | + | *[[Beta-2 microglobulin 3D structures|Beta-2 microglobulin 3D structures]] |
| | *[[CD1|CD1]] | | *[[CD1|CD1]] |
| | == References == | | == References == |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| | + | [[Category: Large Structures]] |
| | [[Category: Lk3 transgenic mice]] | | [[Category: Lk3 transgenic mice]] |
| | [[Category: Teyton, L]] | | [[Category: Teyton, L]] |
| Structural highlights
2q7y is a 4 chain structure with sequence from Lk3 transgenic mice. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
| | Ligands: | , , , , |
| Related: | |
| Gene: | Cd1d1, Cd1.1 (LK3 transgenic mice), B2m (LK3 transgenic mice) |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
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] [B2MG_MOUSE] Component of the class I major histocompatibility complex (MHC). Involved in the presentation of peptide antigens to the immune system.
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
The semi-invariant Valpha14Jalpha18 T cell receptor (TCR) is expressed by regulatory NKT cells and has the unique ability to recognize chemically diverse ligands presented by CD1d. The crystal structure of CD1d complexed to a natural, endogenous ligand, isoglobotrihexosylceramide (iGb3), illustrates the extent of this diversity when compared to the binding of potent, exogenous ligands, such as alpha-galactosylceramide (alpha-GalCer). A single mode of recognition for these two classes of ligands would then appear problematic for a single T cell receptor. However, the Valpha14 TCR adopts two different conformations in the crystal where, in one configuration, the presence of a larger cavity between the two CDR3 regions could accommodate iGb3 and, in the other, a smaller cavity fits alpha-GalCer more snugly. Alternatively, the extended iGb3 headgroup could be "squashed" upon docking of the TCR and accommodated between the CD1 and TCR surfaces. Thus, the same TCR may adopt alternative modes of recognition for these foreign and self-ligands for NKT cell activation.
Crystal structures of mouse CD1d-iGb3 complex and its cognate Valpha14 T cell receptor suggest a model for dual recognition of foreign and self glycolipids.,Zajonc DM, Savage PB, Bendelac A, Wilson IA, Teyton L J Mol Biol. 2008 Apr 4;377(4):1104-16. Epub 2008 Jan 31. PMID:18295796[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
- ↑ Zajonc DM, Savage PB, Bendelac A, Wilson IA, Teyton L. Crystal structures of mouse CD1d-iGb3 complex and its cognate Valpha14 T cell receptor suggest a model for dual recognition of foreign and self glycolipids. J Mol Biol. 2008 Apr 4;377(4):1104-16. Epub 2008 Jan 31. PMID:18295796 doi:10.1016/j.jmb.2008.01.061
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