4j6q | pdb_00004j6q

Crystal structure of calcium2+-free wild-type CD23 lectin domain (crystal form G)

spinqualitylabelsall models 4j6q, resolution 2.54Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4j6q is a 1 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Related: 4g96 Gene: CD23A, CLEC4J, FCE2, FCER2, IGEBF (Homo sapiens) Resources: FirstGlance, OCA, RCSB, PDBsum 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). Publication Abstract from PubMed IgE antibodies play a central role in allergic disease. They recognize allergens via their Fab regions, whilst their effector functions are controlled through interactions of the Fc region with two principal cell surface receptors, FcvarepsilonRI and CD23. Crosslinking of FcvarepsilonRI-bound IgE on mast cells and basophils by allergen initiates an immediate inflammatory response, while the interaction of IgE with CD23 on B-cells regulates IgE production. We have determined the structures of the C-type lectin "head" domain of CD23 from seven crystal forms. The thirty-five independent structures reveal extensive conformational plasticity in two loops that are critical for IgE binding. Conformational plasticity at the IgE-binding site of the B-cell receptor CD23.,Dhaliwal B, Pang MO, Yuan D, Yahya N, Fabiane SM, McDonnell JM, Gould HJ, Beavil AJ, Sutton BJ Mol Immunol. 2013 Aug 6;56(4):693-697. doi: 10.1016/j.molimm.2013.07.005. PMID:23933509 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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