View source for 1eaj


==DIMERIC STRUCTURE OF THE COXSACKIE VIRUS AND ADENOVIRUS RECEPTOR D1 DOMAIN AT 1.35 ANGSTROM RESOLUTION==
<StructureSection load='1eaj' size='340' side='right'caption='[[1eaj]], [[Resolution|resolution]] 1.35&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1eaj]] is a 2 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=1EAJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1EAJ FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.35&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=1eaj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1eaj OCA], [https://pdbe.org/1eaj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1eaj RCSB], [https://www.ebi.ac.uk/pdbsum/1eaj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1eaj ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/CXAR_HUMAN CXAR_HUMAN] Component of the epithelial apical junction complex that is essential for the tight junction integrity. Proposed to function as a homophilic cell adhesion molecule. Recruits MPDZ to intercellular contact sites. Probably involved in transepithelial migration of polymorphonuclear leukocytes (PMN) through adhesive interactions with AMICA1/JAML located in the plasma membrane of PMN.<ref>PMID:9096397</ref> <ref>PMID:11734628</ref> <ref>PMID:12297051</ref> <ref>PMID:15800062</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/ea/1eaj_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=1eaj ConSurf].
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== Publication Abstract from PubMed ==
BACKGROUND: The coxsackievirus and adenovirus receptor (CAR) comprises two extracellular immunoglobulin domains, a transmembrane helix and a C-terminal intracellular domain. The amino-terminal immunoglobulin domain (D1) of CAR is necessary and sufficient for adenovirus binding, whereas the site of coxsackievirus attachment has not yet been localized. The normal cellular role of CAR is currently unknown, although CAR was recently proposed to function as a homophilic cell adhesion molecule. RESULTS: The human CAR D1 domain was bacterially expressed and crystallized. The structure was solved by molecular replacement using the structure of CAR D1 bound to the adenovirus type 12 fiber head and refined to 1.7 A resolution, including individual anisotropic temperature factors. The two CAR D1 structures are virtually identical, apart from the BC, C"D, and FG loops that are involved both in fiber head binding and homodimerization in the crystal. Analytical equilibrium ultracentrifugation shows that a dimer also exists in solution, with a dissociation constant of 16 microM. CONCLUSIONS: The CAR D1 domain forms homodimers in the crystal using the same GFCC'C" surface that interacts with the adenovirus fiber head. The homodimer is very similar to the CD2 D1-CD58 D1 heterodimer. CAR D1 also forms dimers in solution with a dissociation constant typical of other cell adhesion complexes. These results are consistent with reports that CAR may function physiologically as a homophilic cell adhesion molecule in the developing mouse brain. Adenovirus may thus have recruited an existing and conserved interaction surface of CAR to use for its own cell attachment.

Dimeric structure of the coxsackievirus and adenovirus receptor D1 domain at 1.7 A resolution.,van Raaij MJ, Chouin E, van der Zandt H, Bergelson JM, Cusack S Structure. 2000 Nov 15;8(11):1147-55. PMID:11080637<ref>PMID:11080637</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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== References ==
<references/>
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Cusack S]]
[[Category: Van Raaij MJ]]