title: Cloning, Expression, and Purification of a Nitric Oxide Synthase-Like Protein from Bacillus cereus.
abstract: The nitric oxide synthase-like protein from Bacillus cereus (bcNOS) has been cloned, expressed, and characterized. This small hemeprotein (356 amino acids in length) has a mass of 43 kDa and forms a dimer. The recombinant protein showed similar spectral shifts to the mammalian NOS proteins and could bind the substrates L-arginine and N(G)-hydroxy-L-arginine as well as the ligand imidazole. Low levels of activity were recorded for the hydrogen peroxide-dependent oxidation of N(G)-hydroxy-L-arginine and L-arginine by bcNOS, while a reconstituted system with the rat neuronal NOS reductase domain showed no activity. The recombinant bcNOS protein adds to the complement of bacterial NOS-like proteins that are used for the investigation of the mechanism and function of NO in microorganisms.
authors.affiliation: Department of Chemistry, University of Waterloo, Waterloo, ON, Canada N2L 3G1.
authors.forename: Heather J
authors.initials: HJ
authors.lastname: Montgomery
authors.forename: Andrea L
authors.initials: AL
authors.lastname: Dupont
authors.forename: Hilary E
authors.initials: HE
authors.lastname: Leivo
authors.forename: J Guy
authors.initials: JG
authors.lastname: Guillemette