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==Ternary crystal structure of the 3C8 TCR-CD1c-monoacylglycerol complex==
==Ternary crystal structure of the 3C8 TCR-CD1c-monoacylglycerol complex==
<StructureSection load='6c09' size='340' side='right' caption='[[6c09]], [[Resolution|resolution]] 2.95&Aring;' scene=''>
<StructureSection load='6c09' size='340' side='right'caption='[[6c09]], [[Resolution|resolution]] 2.95&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[6c09]] is a 4 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=6C09 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6C09 FirstGlance]. <br>
<table><tr><td colspan='2'>[[6c09]] is a 4 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=6C09 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6C09 FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=D10:DECANE'>D10</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=EKG:(2R)-2,3-dihydroxypropyl+hexadecanoate'>EKG</scene>, <scene name='pdbligand=K:POTASSIUM+ION'>K</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</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]] 2.95&#8491;</td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CD1C ([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='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=D10:DECANE'>D10</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=EKG:(2R)-2,3-dihydroxypropyl+hexadecanoate'>EKG</scene>, <scene name='pdbligand=K:POTASSIUM+ION'>K</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene></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=6c09 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6c09 OCA], [http://pdbe.org/6c09 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6c09 RCSB], [http://www.ebi.ac.uk/pdbsum/6c09 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6c09 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=6c09 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6c09 OCA], [https://pdbe.org/6c09 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6c09 RCSB], [https://www.ebi.ac.uk/pdbsum/6c09 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6c09 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/CD1C_HUMAN CD1C_HUMAN]] Antigen-presenting protein that binds self and non-self lipid and glycolipid antigens and presents them to T-cell receptors on natural killer T-cells.<ref>PMID:10786796</ref> <ref>PMID:10890914</ref> <ref>PMID:10899914</ref> <ref>PMID:21167756</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.
[https://www.uniprot.org/uniprot/CD1C_HUMAN CD1C_HUMAN] Antigen-presenting protein that binds self and non-self lipid and glycolipid antigens and presents them to T-cell receptors on natural killer T-cells.<ref>PMID:10786796</ref> <ref>PMID:10890914</ref> <ref>PMID:10899914</ref> <ref>PMID:21167756</ref>  
<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]]
*[[CD1|CD1]]
*[[T-cell receptor 3D structures|T-cell receptor 3D structures]]
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Human]]
[[Category: Homo sapiens]]
[[Category: Rossjohn, J]]
[[Category: Large Structures]]
[[Category: Wun, K S]]
[[Category: Rossjohn J]]
[[Category: Antigen presentation]]
[[Category: Wun KS]]
[[Category: Immune system]]
[[Category: T cell receptor]]

Latest revision as of 17:53, 4 October 2023

Ternary crystal structure of the 3C8 TCR-CD1c-monoacylglycerol complexTernary crystal structure of the 3C8 TCR-CD1c-monoacylglycerol complex

Structural highlights

6c09 is a 4 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.95Å
Ligands:, , , , ,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

CD1C_HUMAN Antigen-presenting protein that binds self and non-self lipid and glycolipid antigens and presents them to T-cell receptors on natural killer T-cells.[1] [2] [3] [4]

Publication Abstract from PubMed

The hallmark function of alphabeta T cell antigen receptors (TCRs) involves the highly specific co-recognition of a major histocompatibility complex molecule and its carried peptide. However, the molecular basis of the interactions of TCRs with the lipid antigen-presenting molecule CD1c is unknown. We identified frequent staining of human T cells with CD1c tetramers across numerous subjects. Whereas TCRs typically show high specificity for antigen, both tetramer binding and autoreactivity occurred with CD1c in complex with numerous, chemically diverse self lipids. Such extreme polyspecificity was attributable to binding of the TCR over the closed surface of CD1c, with the TCR covering the portal where lipids normally protrude. The TCR essentially failed to contact lipids because they were fully seated within CD1c. These data demonstrate the sequestration of lipids within CD1c as a mechanism of autoreactivity and point to small lipid size as a determinant of autoreactive T cell responses.

T cell autoreactivity directed toward CD1c itself rather than toward carried self lipids.,Wun KS, Reijneveld JF, Cheng TY, Ladell K, Uldrich AP, Le Nours J, Miners KL, McLaren JE, Grant EJ, Haigh OL, Watkins TS, Suliman S, Iwany S, Jimenez J, Calderon R, Tamara KL, Leon SR, Murray MB, Mayfield JA, Altman JD, Purcell AW, Miles JJ, Godfrey DI, Gras S, Price DA, Van Rhijn I, Moody DB, Rossjohn J Nat Immunol. 2018 Apr;19(4):397-406. doi: 10.1038/s41590-018-0065-7. Epub 2018, Mar 12. PMID:29531339[5]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

See Also

References

  1. ↑ Moody DB, Ulrichs T, Muhlecker W, Young DC, Gurcha SS, Grant E, Rosat JP, Brenner MB, Costello CE, Besra GS, Porcelli SA. CD1c-mediated T-cell recognition of isoprenoid glycolipids in Mycobacterium tuberculosis infection. Nature. 2000 Apr 20;404(6780):884-8. PMID:10786796 doi:http://dx.doi.org/10.1038/35009119
  2. ↑ Sugita M, van Der Wel N, Rogers RA, Peters PJ, Brenner MB. CD1c molecules broadly survey the endocytic system. Proc Natl Acad Sci U S A. 2000 Jul 18;97(15):8445-50. PMID:10890914 doi:http://dx.doi.org/10.1073/pnas.150236797
  3. ↑ Briken V, Jackman RM, Watts GF, Rogers RA, Porcelli SA. Human CD1b and CD1c isoforms survey different intracellular compartments for the presentation of microbial lipid antigens. J Exp Med. 2000 Jul 17;192(2):281-8. PMID:10899914
  4. ↑ Scharf L, Li NS, Hawk AJ, Garzon D, Zhang T, Fox LM, Kazen AR, Shah S, Haddadian EJ, Gumperz JE, Saghatelian A, Faraldo-Gomez JD, Meredith SC, Piccirilli JA, Adams EJ. The 2.5 a structure of CD1c in complex with a mycobacterial lipid reveals an open groove ideally suited for diverse antigen presentation. Immunity. 2010 Dec 14;33(6):853-62. PMID:21167756 doi:10.1016/j.immuni.2010.11.026
  5. ↑ Wun KS, Reijneveld JF, Cheng TY, Ladell K, Uldrich AP, Le Nours J, Miners KL, McLaren JE, Grant EJ, Haigh OL, Watkins TS, Suliman S, Iwany S, Jimenez J, Calderon R, Tamara KL, Leon SR, Murray MB, Mayfield JA, Altman JD, Purcell AW, Miles JJ, Godfrey DI, Gras S, Price DA, Van Rhijn I, Moody DB, Rossjohn J. T cell autoreactivity directed toward CD1c itself rather than toward carried self lipids. Nat Immunol. 2018 Apr;19(4):397-406. doi: 10.1038/s41590-018-0065-7. Epub 2018, Mar 12. PMID:29531339 doi:http://dx.doi.org/10.1038/s41590-018-0065-7

6c09, resolution 2.95Å

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