1sfb | pdb_00001sfb

BINDING OF PENTA-N-ACETYLCHITOPENTAOSE TO HEW LYSOZYME: A POWDER DIFFRACTION STUDY

spinqualitylabelsall models 1sfb, resolution 3.22Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1sfb is a 1 chain structure with sequence from Gallus gallus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray powder diffraction, Resolution 3.22Å Ligands: NAG Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function LYSC_CHICK Lysozymes have primarily a bacteriolytic function; those in tissues and body fluids are associated with the monocyte-macrophage system and enhance the activity of immunoagents. Has bacteriolytic activity against M.luteus. 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 The binding of N-acetylglucosamine oligosaccharides (NAGn, n = 2-6) to hen egg-white lysozyme (HEWL; EC 3.2.1.17) was investigated by X-ray powder diffraction at room temperature. Each NAGn examined was found to bind to lysozyme in rapid-precipitation preparations in 1.0 M NaCl pH 6.0 buffer. The location of each NAGn was easily found from difference Fourier maps generated from structure factors extracted during preliminary Rietveld refinements. Full NAGn-protein structures were subjected to combined Rietveld and stereochemical restraint refinements (Rwp = 2.28-2.59%; Rp = 1.81-2.04%; RF2 = 3.91-5.80%) and revealed binding modes for NAGn that depended on the length of the NAG oligosaccharide. The NAG2 ligand was found in the BC sites in the cleft of HEWL, NAG3 was found to bind in both the ABC and BCD sites in the ratio 35:65 and NAG4 and NAG5 bound to the ABCD and ABCDE sites, respectively, while NAG6 only bound to sites ABCDE, leaving the F site empty with the remaining saccharide ring located in a solvent region adjacent to the A site. All protein powder diffraction patterns in this study consisted of extremely sharp Bragg peaks consistent with approximately 1 microm crystallites that were devoid of line-broadening defects. Details of the stereochemical restraints used in these refinements and their impact on structural validation are also discussed. Binding of N-acetylglucosamine oligosaccharides to hen egg-white lysozyme: a powder diffraction study.,Von Dreele RB Acta Crystallogr D Biol Crystallogr. 2005 Jan;61(Pt 1):22-32. Epub 2004, Dec 17. PMID:15608372 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Lysozyme 3D structures

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