3lz2

STRUCTURE DETERMINATION OF TURKEY EGG WHITE LYSOZYME USING LAUE DIFFRACTION

spinqualitylabelsall models 3lz2, resolution 2.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3lz2 is a 1 chain structure with sequence from Melga. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Activity: Lysozyme, with EC number 3.2.1.17 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [LYSC_MELGA] 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. 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 three-dimensional structure of turkey egg-white lysozyme (TEWL) has been solved and refined at 2.5 A resolution using X-ray data collected by the Laue method. This is the first protein structure determination undertaken using Laue diffraction data. A re-examination of the existing structure of TEWL was necessary when attempts to refine an atomic model based on the C alpha positions in the Protein Data Bank (entry 1LZ2) failed. The correct orientation and position of the turkey lysozyme molecules within the crystallographic unit cell were determined by molecular replacement using a refined model of the homologous hen egg-white lysozyme crystal structure. After modification of the model to reflect the differences in amino-acid sequence between the chicken and turkey enzymes, the structure was subjected to crystallographic refinement using the simulated-annealing refinement technique and conventional least-squares refinement. This yielded a final residual of R = 20.7%. This crystal form is of potential interest for time-resolved crystallographic studies since the amino-acid residues involved in catalysis (Asp52 and Glu35) are accessible to solvent and not blocked by crystal contacts. Structure determination of turkey egg-white lysozyme using Laue diffraction data.,Howell PL, Almo SC, Parsons MR, Hajdu J, Petsko GA Acta Crystallogr B. 1992 Apr 1;48 ( Pt 2):200-7. PMID:1515108 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Lysozyme 3D structures

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