1. Crystal structure of amine oxidase from bovine serum
- Author
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Roberto Battistutta, Giuseppe Zanotti, Marianna Biadene, Vito Calderone, Marina Scarpa, Maria Luisa Di Paolo, Adelio Rigo, and Michele Lunelli
- Subjects
Models, Molecular ,Serum ,Amine oxidase ,crystal structure ,Protein Folding ,Glycosylation ,Xenon ,Stereochemistry ,Crystal structure ,copper-containing amine oxidases ,primary amines ,Crystallography, X-Ray ,Cofactor ,chemistry.chemical_compound ,Structural Biology ,Oxidoreductase ,Cations ,Animals ,Bovine serum albumin ,Protein Structure, Quaternary ,Molecular Biology ,chemistry.chemical_classification ,Binding Sites ,biology ,Chemistry ,cofactor ,Hydrogen Bonding ,SUBSTRATE-SPECIFICITY ,Solvent ,Protein Subunits ,Monomer ,biology.protein ,Amine gas treating ,Cattle ,Amine Oxidase (Copper-Containing) - Abstract
Copper-containing amine oxidase extracted from bovine serum (BSAO) was crystallized and its three-dimensional structure at 2.37 A resolution is described. The biological unit of BSAO is a homodimer, formed by two monomers related to each other by a non-crystallographic 2-fold axis. Each monomer is composed of three domains, similar to those of other amine oxidases from lower species. The two monomers are structurally equivalent, despite some minor differences at the two active sites. A large funnel allows access of substrates to the active-site; another cavity, accessible to the solvent, is also present between the two monomers; this second cavity could allow the entrance of molecular oxygen necessary for the oxidative reaction. Some sugar residues, bound to Asn, were still present and visible in the electron density map, in spite of the exhaustive deglycosylation necessary to grow the crystals. The comparison of the BSAO structure with those of other resolved AO structures shows strong dissimilarities in the architecture and charge distribution of the cavities leading to the active-site, possibly explaining the differences in substrate specificity.
- Published
- 2004