1z2k | pdb_00001z2k

NMR structure of the D1 domain of the Natural Killer Cell Receptor, 2B4

spinqualitylabelsall models 1z2k, 14 NMR models Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1z2k is a 1 chain structure with sequence from Lk3 transgenic mice. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Gene: Cd244, 2b4, Nmrk (LK3 transgenic mice) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [CD244_MOUSE] Modulate other receptor-ligand interactions to enhance leukocyte activation (By similarity). 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 2B4, a transmembrane receptor expressed primarily on natural killer (NK) cells and on a subset of CD8(+) T cells, plays an important role in activating NK-mediated cytotoxicity through its interaction with CD48 on target cells. We report here the atomic-resolution structure of the ligand-binding (D1) domain of 2B4 in solution determined by nuclear magnetic resonance (NMR) spectroscopy. The overall main chain structure resembles an immunoglobulin variable (V) domain fold, very similar to that seen previously for domain 1 of CD2 and CD4. The structure contains nine beta-strands assembled into two beta-sheets conventionally labeled DEB and AGFCC'C' '. The six-stranded sheet (AGFCC'C' ') contains structural features that may have implications for ligand recognition and receptor function. A noncanonical disulfide bridge between Cys2 and Cys99 stabilizes a long and parallel beta-structure between strand A (residues 3-12) and strand G (residues 100-108). A beta-bulge at residues Glu45 and Ile46 places a bend in the middle of strand C' that orients two conserved and adjacent hydrophobic residues (Ile46 and Leu47) inside the beta-sandwich as seen in other V domains. Finally, the FG-loop (implicated in ligand recognition in the CD2-CD58 complex) is dynamically disordered in 2B4 in the absence of a ligand. We propose that ligand binding to 2B4 might stabilize the structure of the FG-loop in the ligand complex. NMR structure of the natural killer cell receptor 2B4 (CD244): implications for ligand recognition.,Ames JB, Vyas V, Lusin JD, Mariuzza R Biochemistry. 2005 May 3;44(17):6416-23. PMID:15850375 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also NK cell receptor

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