Abstract
The antibody IgE plays a central role in allergic disease, functioning principally through two cell-surface receptors: Fc epsilon RI and CD23. Fc epsilon RI on mast cells and basophils mediates the immediate hypersensitivity response, whilst the interaction of IgE with CD23 on B cells regulates IgE production. Crystal structures of the lectin-like 'head' domain of CD23 alone and bound to a subfragment of IgE consisting of the dimer of C epsilon 3 and C epsilon 4 domains (Fc epsilon 3-4) have recently been determined, revealing flexibility in the IgE-binding site of CD23. Here, a new crystal form of the CD23-Fc epsilon 3-4 complex with different molecular-packing constraints is reported, which together with the earlier results demonstrates that conformational variability at the interface extends additionally to the IgE Fc and the quaternary structure of its domains.
Original language | English |
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Article number | N/A |
Pages (from-to) | 305-309 |
Number of pages | 5 |
Journal | Acta Crystallographica Section F-Structural Biology And Crystallization Communications |
Volume | 70 |
Issue number | 3 |
DOIs | |
Publication status | Published - Mar 2014 |
Keywords
- LOW-AFFINITY RECEPTOR
- HUMAN-IMMUNOGLOBULIN E
- HUMAN B-CELLS
- EPSILON-RI
- CONFORMATIONAL FLEXIBILITY
- STRUCTURAL-CHANGES
- CRYSTAL-STRUCTURE
- LECTIN DOMAIN
- DATA QUALITY
- REFINEMENT