GO:0005506 iron ion binding
GO:0016706 oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen, 2-oxoglutarate as one donor, and incorporation of one atom each of oxygen into both donors
Members of this protein family are gamma-butyrobetaine hydroxylase, both bacterial and eukaryotic. This enzyme catalyzes the last step in the conversion of lysine to carnitine. Carnitine can serve as a compatible solvent in bacteria and also participates in fatty acid metabolism.