1t8c

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[[Image:1t8c.gif|left|200px]]
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{{STRUCTURE_1t8c| PDB=1t8c | SCENE= }}
{{STRUCTURE_1t8c| PDB=1t8c | SCENE= }}
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'''Structure of the C-type lectin domain of CD23'''
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===Structure of the C-type lectin domain of CD23===
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==Overview==
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The low-affinity immunoglobulin E (IgE) receptor, CD23 (FcepsilonRII), binds both IgE and CD21 and, through these interactions, regulates the synthesis of IgE, the antibody isotype that mediates the allergic response. We have determined the three-dimensional structure of the C-type lectin domain of CD23 in solution by nuclear magnetic resonance spectroscopy. An analysis of concentration-dependent chemical shift perturbations have allowed us to identify the residues engaged in self-association to the trimeric state, whereas ligand-induced changes have defined the binding sites for IgE and CD21. The results further reveal that CD23 can bind both ligands simultaneously. Despite the C-type lectin domain structure, none of the interactions require calcium. We also find that IgE and CD23 can interact to form high molecular mass multimeric complexes. The interactions that we have described provide a solution to the paradox that CD23 is involved in both up- and down-regulation of IgE and provide a structural basis for the development of inhibitors of allergic disease.
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(as it appears on PubMed at http://www.pubmed.gov), where 16172256 is the PubMed ID number.
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{{ABSTRACT_PUBMED_16172256}}
==About this Structure==
==About this Structure==
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1T8C is a [[Single protein]] structure of sequence 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=1T8C OCA].
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1T8C is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1T8C OCA].
==Reference==
==Reference==
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[[Category: Fcerii]]
[[Category: Fcerii]]
[[Category: Ige]]
[[Category: Ige]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 09:39:46 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 16:10:26 2008''

Revision as of 13:10, 28 July 2008

Image:1t8c.png

Template:STRUCTURE 1t8c

Structure of the C-type lectin domain of CD23

Template:ABSTRACT PUBMED 16172256

About this Structure

1T8C is a Single protein structure of sequence from Homo sapiens. Full experimental information is available from OCA.

Reference

The structure of human CD23 and its interactions with IgE and CD21., Hibbert RG, Teriete P, Grundy GJ, Beavil RL, Reljic R, Holers VM, Hannan JP, Sutton BJ, Gould HJ, McDonnell JM, J Exp Med. 2005 Sep 19;202(6):751-60. PMID:16172256

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