3gxk

The crystal structure of g-type lysozyme from Atlantic cod (Gadus morhua L.) in complex with NAG oligomers sheds new light on substrate binding and the catalytic mechanism. Native structure to 1.9

spinqualitylabelsall models 3gxk, resolution 1.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3gxk is a 4 chain structure with sequence from Gadus morhua. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CO Related: 3gxr Gene: lysozyme (Gadus morhua) Activity: Lysozyme, with EC number 3.2.1.17 Resources: FirstGlance, OCA, RCSB, PDBsum 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 Crystal structures of Atlantic cod lysozyme have been solved with and without ligand bound in the active site to 1.7 and 1.9 A resolution, respectively. The structures reveal the presence of NAG in the substrate binding sites at both sides of the catalytic Glu73, hence allowing the first crystallographic description of the goose-type (g-type) lysozyme E-G binding sites. In addition, two aspartic acid residues suggested to participate in catalysis (Asp101 and Asp90) were mutated to alanine. Muramidase activity data for two single mutants and one double mutant demonstrates that both residues are involved in catalysis, but Asp101 is the more critical of the two. The structures and activity data suggest that a water molecule is the nucleophile completing the catalytic reaction, and the roles of the aspartic acids are to ensure proper positioning of the catalytic water. Crystal structures of g-type lysozyme from Atlantic cod shed new light on substrate binding and the catalytic mechanism.,Helland R, Larsen RL, Finstad S, Kyomuhendo P, Larsen AN Cell Mol Life Sci. 2009 Aug;66(15):2585-98. Epub 2009 Jun 20. PMID:19543850 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Lysozyme 3D structures

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