1xz0

From Proteopedia

(Difference between revisions)

Current revision

Crystal structure of CD1a in complex with a synthetic mycobactin lipopeptide

Structural highlights

1xz0 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 2.8Å
Ligands:	, ,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

CD1A_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]

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

CD1a is expressed on Langerhans cells (LCs) and dendritic cells (DCs), where it mediates T cell recognition of glycolipid and lipopeptide antigens that contain either one or two alkyl chains. We demonstrate here that CD1a-restricted T cells can discriminate the peptide component of didehydroxymycobactin lipopeptides. Structure analysis of CD1a cocrystallized with a synthetic mycobactin lipopeptide at 2.8 A resolution further reveals that the single alkyl chain is inserted deep within the A' pocket of the groove, whereas its two peptidic branches protrude along the F' pocket to the outer, alpha-helical surface of CD1a for recognition by the TCR. Remarkably, the cyclized lysine branch of the peptide moiety lies in the shallow F' pocket in a conformation that closely mimics that of the alkyl chain in the CD1a-sulfatide structure. Thus, this structural study illustrates how a single chain lipid can be presented by CD1 and that the peptide moiety of the lipopeptide is recognized by the TCR.

Molecular mechanism of lipopeptide presentation by CD1a.,Zajonc DM, Crispin MD, Bowden TA, Young DC, Cheng TY, Hu J, Costello CE, Rudd PM, Dwek RA, Miller MJ, Brenner MB, Moody DB, Wilson IA Immunity. 2005 Feb;22(2):209-19. PMID:15723809^[4]

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

References

↑ Salamero J, Bausinger H, Mommaas AM, Lipsker D, Proamer F, Cazenave JP, Goud B, de la Salle H, Hanau D. CD1a molecules traffic through the early recycling endosomal pathway in human Langerhans cells. J Invest Dermatol. 2001 Mar;116(3):401-8. PMID:11231314 doi:1264
↑ Vincent MS, Xiong X, Grant EP, Peng W, Brenner MB. CD1a-, b-, and c-restricted TCRs recognize both self and foreign antigens. J Immunol. 2005 Nov 15;175(10):6344-51. PMID:16272286
↑ Sloma I, Zilber MT, Vasselon T, Setterblad N, Cavallari M, Mori L, De Libero G, Charron D, Mooney N, Gelin C. Regulation of CD1a surface expression and antigen presentation by invariant chain and lipid rafts. J Immunol. 2008 Jan 15;180(2):980-7. PMID:18178838
↑ Zajonc DM, Crispin MD, Bowden TA, Young DC, Cheng TY, Hu J, Costello CE, Rudd PM, Dwek RA, Miller MJ, Brenner MB, Moody DB, Wilson IA. Molecular mechanism of lipopeptide presentation by CD1a. Immunity. 2005 Feb;22(2):209-19. PMID:15723809 doi:10.1016/j.immuni.2004.12.009

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1xz0"

@@ Line 1: / Line 1: @@
-{{Seed}}
-[[Image:1xz0.png|left|200px]]
-<!--
+==Crystal structure of CD1a in complex with a synthetic mycobactin lipopeptide==
-The line below this paragraph, containing "STRUCTURE_1xz0", creates the "Structure Box" on the page.
+<StructureSection load='1xz0' size='340' side='right'caption='[[1xz0]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
-You may change the PDB parameter (which sets the PDB file loaded into the applet)
+== Structural highlights ==
-or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
+<table><tr><td colspan='2'>[[1xz0]] 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=1XZ0 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1XZ0 FirstGlance]. <br>
-or leave the SCENE parameter empty for the default display.
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.8&#8491;</td></tr>
--->
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FUC:ALPHA-L-FUCOSE'>FUC</scene>, <scene name='pdbligand=JH0:[(2R)-4-[[(3S)-1-(tert-butyl-diphenyl-silyl)oxy-2-oxo-azepan-3-yl]amino]-4-oxo-butan-2-yl]+(2S)-6-(hexadecanoyl-hydroxy-amino)-2-[[(4R)-2-(2-hydroxyphenyl)-4,5-dihydro-1,3-oxazol-4-yl]carbonylamino]hexanoate'>JH0</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></td></tr>
-{{STRUCTURE_1xz0|  PDB=1xz0  |  SCENE=  }}
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1xz0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1xz0 OCA], [https://pdbe.org/1xz0 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1xz0 RCSB], [https://www.ebi.ac.uk/pdbsum/1xz0 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1xz0 ProSAT]</span></td></tr>
+</table>
+== Function ==
+[https://www.uniprot.org/uniprot/CD1A_HUMAN CD1A_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:11231314</ref> <ref>PMID:16272286</ref> <ref>PMID:18178838</ref>
+== Evolutionary Conservation ==
+[[Image:Consurf_key_small.gif|200px|right]]
+Check<jmol>
+  <jmolCheckbox>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/xz/1xz0_consurf.spt"</scriptWhenChecked>
+    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
+    <text>to colour the structure by Evolutionary Conservation</text>
+  </jmolCheckbox>
+</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1xz0 ConSurf].
+<div style="clear:both"></div>
+<div style="background-color:#fffaf0;">
+== Publication Abstract from PubMed ==
+CD1a is expressed on Langerhans cells (LCs) and dendritic cells (DCs), where it mediates T cell recognition of glycolipid and lipopeptide antigens that contain either one or two alkyl chains. We demonstrate here that CD1a-restricted T cells can discriminate the peptide component of didehydroxymycobactin lipopeptides. Structure analysis of CD1a cocrystallized with a synthetic mycobactin lipopeptide at 2.8 A resolution further reveals that the single alkyl chain is inserted deep within the A' pocket of the groove, whereas its two peptidic branches protrude along the F' pocket to the outer, alpha-helical surface of CD1a for recognition by the TCR. Remarkably, the cyclized lysine branch of the peptide moiety lies in the shallow F' pocket in a conformation that closely mimics that of the alkyl chain in the CD1a-sulfatide structure. Thus, this structural study illustrates how a single chain lipid can be presented by CD1 and that the peptide moiety of the lipopeptide is recognized by the TCR.
-===Crystal structure of CD1a in complex with a synthetic mycobactin lipopeptide===
+Molecular mechanism of lipopeptide presentation by CD1a.,Zajonc DM, Crispin MD, Bowden TA, Young DC, Cheng TY, Hu J, Costello CE, Rudd PM, Dwek RA, Miller MJ, Brenner MB, Moody DB, Wilson IA Immunity. 2005 Feb;22(2):209-19. PMID:15723809<ref>PMID:15723809</ref>
+From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
+</div>
+<div class="pdbe-citations 1xz0" style="background-color:#fffaf0;"></div>
-<!--
+==See Also==
-The line below this paragraph, {{ABSTRACT_PUBMED_15723809}}, adds the Publication Abstract to the page
+*[[Beta-2 microglobulin 3D structures|Beta-2 microglobulin 3D structures]]
-(as it appears on PubMed at http://www.pubmed.gov), where 15723809 is the PubMed ID number.
+*[[CD1|CD1]]
--->
+== References ==
-{{ABSTRACT_PUBMED_15723809}}
+<references/>
+__TOC__
-==Disease==
+</StructureSection>
-Known disease associated with this structure: Hypoproteinemia, hypercatabolic OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=109700 109700]]
-==About this Structure==
-XZ0 is a 4 chains structure of sequences 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=1XZ0 OCA].
-==Reference==
-<ref group="xtra">PMID:15723809</ref><references group="xtra"/>
 [[Category: Homo sapiens]]
-[[Category: Bowden, T A.]]
+[[Category: Large Structures]]
-[[Category: Cheng, T Y.]]
+[[Category: Bowden TA]]
-[[Category: Costello, C E.]]
+[[Category: Cheng TY]]
-[[Category: Crispin, M D.]]
+[[Category: Costello CE]]
-[[Category: Hu, J.]]
+[[Category: Crispin MD]]
-[[Category: Miller, M J.]]
+[[Category: Hu J]]
-[[Category: Moody, D B.]]
+[[Category: Miller MJ]]
-[[Category: Wilson, I A.]]
+[[Category: Moody DB]]
-[[Category: Young, D C.]]
+[[Category: Wilson IA]]
-[[Category: Zajonc, D M.]]
+[[Category: Young DC]]
-[[Category: Beta sheet platform]]
+[[Category: Zajonc DM]]
-[[Category: Mhc-fold]]
-[[Category: Protein-lipopeptide complex]]
-''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Feb 17 10:25:09 2009''

1xz0

From Proteopedia

Current revision

Crystal structure of CD1a in complex with a synthetic mycobactin lipopeptide

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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