Required for the assembly of the copper chromophores of nitrous oxide reductase (PubMed:2170125). Has ATPase activity (PubMed:12618453). Could be part of the ABC transporter complex NosDFY (Probable). Inhibited by AMP-PNP. Partially inhibited by N-ethylmaleimide, orthovanadate and NaN(3). Optimum pH is 8.0-8.5. The complex may be composed of an ATP-binding protein (NosF), a transmembrane protein (NosY) and a solute-binding protein (NosD). Induced in response to denitrifying conditions. Activation requires NosR and DnrD regulators. Belongs to the ABC transporter superfamily.