1k3i

Crystal Structure of the Precursor of Galactose Oxidase

spinqualitylabelsall models 1k3i, resolution 1.40Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1k3i is a 1 chain structure with sequence from Fusarium sp.. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ACT, CA, GLC NonStd Res: CSO Related: 1gof, 1gog, 1goh Activity: Galactose oxidase, with EC number 1.1.3.9 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT 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 Galactose oxidase (EC ) is a monomeric enzyme that contains a single copper ion and catalyses the stereospecific oxidation of primary alcohols to their corresponding aldehydes. The protein contains an unusual covalent thioether bond between a tyrosine, which acts as a radical center during the two-electron reaction, and a cysteine. The enzyme is produced in a precursor form lacking the thioether bond and also possessing an additional 17-aa pro-sequence at the N terminus. Previous work has shown that the aerobic addition of Cu(2+) to the precursor is sufficient to generate fully processed mature enzyme. The structure of the precursor protein has been determined to 1.4 A, revealing the location of the pro-sequence and identifying structural differences between the precursor and the mature protein. Structural alignment of the precursor and mature forms of galactose oxidase shows that five regions of main chain and some key residues of the active site differ significantly between the two forms. The precursor structure provides a starting point for modeling the chemistry of thioether bond formation and pro-sequence cleavage. Crystal structure of the precursor of galactose oxidase: an unusual self-processing enzyme.,Firbank SJ, Rogers MS, Wilmot CM, Dooley DM, Halcrow MA, Knowles PF, McPherson MJ, Phillips SE Proc Natl Acad Sci U S A. 2001 Nov 6;98(23):12932-7. PMID:11698678 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Galactose oxidase

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