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==Crystal structure of the human CD23 Lectin domain, apo form== | ==Crystal structure of the human CD23 Lectin domain, apo form== | ||
<StructureSection load='2h2r' size='340' side='right' caption='[[2h2r]], [[Resolution|resolution]] 1.50Å' scene=''> | <StructureSection load='2h2r' size='340' side='right'caption='[[2h2r]], [[Resolution|resolution]] 1.50Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[2h2r]] is a 2 chain structure with sequence from [ | <table><tr><td colspan='2'>[[2h2r]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2H2R OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2H2R FirstGlance]. <br> | ||
</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2h2t|2h2t]], [[1t8d|1t8d]], [[1t8c|1t8c]], [[1kje|1kje]], [[1hli|1hli]], [[1hlj|1hlj]]</td></tr> | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[2h2t|2h2t]], [[1t8d|1t8d]], [[1t8c|1t8c]], [[1kje|1kje]], [[1hli|1hli]], [[1hlj|1hlj]]</div></td></tr> | ||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">FCER2 ([ | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">FCER2 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2h2r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2h2r OCA], [https://pdbe.org/2h2r PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2h2r RCSB], [https://www.ebi.ac.uk/pdbsum/2h2r PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2h2r ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
[[ | [[https://www.uniprot.org/uniprot/FCER2_HUMAN FCER2_HUMAN]] Low-affinity receptor for immunoglobulin E (IgE) and CR2/CD21. Has essential roles in the regulation of IgE production and in the differentiation of B-cells (it is a B-cell-specific antigen). | ||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
Check<jmol> | Check<jmol> | ||
<jmolCheckbox> | <jmolCheckbox> | ||
<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/h2/2h2r_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/h2/2h2r_consurf.spt"</scriptWhenChecked> | ||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | ||
<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
| Line 29: | Line 29: | ||
</div> | </div> | ||
<div class="pdbe-citations 2h2r" style="background-color:#fffaf0;"></div> | <div class="pdbe-citations 2h2r" style="background-color:#fffaf0;"></div> | ||
==See Also== | |||
*[[CD23|CD23]] | |||
== References == | == References == | ||
<references/> | <references/> | ||
| Line 34: | Line 37: | ||
</StructureSection> | </StructureSection> | ||
[[Category: Human]] | [[Category: Human]] | ||
[[Category: Large Structures]] | |||
[[Category: Wurzburg, B A]] | [[Category: Wurzburg, B A]] | ||
[[Category: Apo form]] | [[Category: Apo form]] | ||
Revision as of 10:29, 17 March 2021
Crystal structure of the human CD23 Lectin domain, apo formCrystal structure of the human CD23 Lectin domain, apo form
Structural highlights
Function[FCER2_HUMAN] Low-affinity receptor for immunoglobulin E (IgE) and CR2/CD21. Has essential roles in the regulation of IgE production and in the differentiation of B-cells (it is a B-cell-specific antigen). 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 PubMedCD23, the low-affinity receptor for IgE (Fc epsilonRII), regulates IgE synthesis and also mediates IgE-dependent antigen transport and processing. CD23 is a unique Fc receptor belonging to the C-type lectin-like domain superfamily and binds IgE in an unusual, non-lectin-like manner, requiring calcium but not carbohydrate. We have solved the high-resolution crystal structures of the human CD23 lectin domain in the presence and absence of Ca2+. The crystal structures differ significantly from a previously determined NMR structure and show that calcium binding occurs at the principal binding site, but not at an auxiliary site that appears to be absent in human CD23. Conformational differences between the apo and Ca2+ bound structures suggest how IgE-Fc binding can be both calcium-dependent and carbohydrate-independent. Structural changes in the lectin domain of CD23, the low-affinity IgE receptor, upon calcium binding.,Wurzburg BA, Tarchevskaya SS, Jardetzky TS Structure. 2006 Jun;14(6):1049-58. PMID:16765898[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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