Overlaying the NHases in 4FM4 and 2QDY

The iron centred NHase which I have most experience of is the Rhodococcus erythropolis AJ270. I have overlayed it onto the structure for the Comomonas testosteroni Ni1, and it is very similar as you might expect both at the secondary structure level (4FM4 in red, 2QDY in blue and yellow) and as an alignment. (The original paper makes in-depth analysis with 1AHJ from Rhodococcus sp. r312.)