The 2OG-FeII oxygenase superfamily is widespread in Eukaryotes and bacteria [1] , and is currently the largest known family of oxidising enzymes without a heme group [5] . The 3D structure of several of these oxygenases is known, and they share a common fold with a structurally conserved jelly roll β-sheet core with flanking α-helices. Very few residues are totally conserved across these structures, basically just the residues involved in coordination of the Fe(II) ion and the 2-oxoglutarate.