3wa3

Publication Abstract from PubMed

The crystal structure of a copper amine oxidase from Arthrobacter globiformis was determined at 1.08 A resolution with the use of low-molecular-weight polyethylene glycol (LMW PEG; average molecular weight approximately 200) as a cryoprotectant. The final crystallographic R factor and Rfree were 13.0 and 15.0%, respectively. Several molecules of LMW PEG were found to occupy cavities in the protein interior, including the active site, which resulted in a marked reduction in the overall B factor and consequently led to a subatomic resolution structure for a relatively large protein with a monomer molecular weight of approximately 70 000. About 40% of the presumed H atoms were observed as clear electron densities in the Fo - Fc difference map. Multiple minor conformers were also identified for many residues. Anisotropic displacement fluctuations were evaluated in the active site, which contains a post-translationally derived quinone cofactor and a Cu atom. Furthermore, diatomic molecules, most likely to be molecular oxygen, are bound to the protein, one of which is located in a region that had previously been proposed as an entry route for the dioxygen substrate from the central cavity of the dimer interface to the active site.

High-resolution crystal structure of copper amine oxidase from Arthrobacter globiformis: assignment of bound diatomic molecules as O2.,Murakawa T, Hayashi H, Sunami T, Kurihara K, Tamada T, Kuroki R, Suzuki M, Tanizawa K, Okajima T Acta Crystallogr D Biol Crystallogr. 2013 Dec;69(Pt 12):2483-94. doi:, 10.1107/S0907444913023196. Epub 2013 Nov 19. PMID:24311589^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.