2qqq

Crystal Structure of Novel Immune-Type Receptor 11 Extracellular Fragment from Ictalurus punctatus

spinqualitylabelsall models 2qqq, resolution 1.98Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2qqq is a 4 chain structure with sequence from Ictalurus punctatus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.98Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q8UWK4_ICTPU 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 PubMed Novel immune-type receptors (NITRs) comprise an exceptionally large, diversified family of activating and inhibitory receptors that has been identified in bony fish. Here, we characterized the structure of an activating NITR that is expressed by a cytotoxic natural killer (NK)-like cell line and that specifically binds an allogeneic B cell target. A single amino acid residue within the NITR immunoglobulin variable (V)-type domain accounts for specificity of the interaction. Structures solved by X-ray crystallography revealed that the V-type domains of NITRs form homodimers resembling rearranging antigen-binding receptor heterodimers. CDR1 elements of both subunits of NITR dimers form ligand-binding surfaces that determine specificity for the nonself target. In the evolution of immune function, it appears that a specific NK type of innate recognition may be mediated by a complex germline multigene family of V structures resembling those that are somatically diversified in adaptive immunological responses. A bony fish immunological receptor of the NITR multigene family mediates allogeneic recognition.,Cannon JP, Haire RN, Magis AT, Eason DD, Winfrey KN, Hernandez Prada JA, Bailey KM, Jakoncic J, Litman GW, Ostrov DA Immunity. 2008 Aug 15;29(2):228-37. Epub 2008 Jul 31. PMID:18674935 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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