Table 1.

Structural similarity between T. potens IscR and other winged-helix transcription regulators

Protein	PDB ID code	rmsd, Å	No. of aligned Cα atoms	Amino acid sequence identity, %*	Z-score
B. subtilis CymR	2y75	1.5	119	55	17.2
E. coli IscR (unliganded)	4hf0	2.0	116	41	16.8
E. coli IscR (DNA complex)	4hf1	2.3	120	40	16.3
S. aureus CymR	3t8t	2.3	119	46	15.9
Putative transcriptional regulator from L. innocua	3lwf	3.8	124	48	14.9
B. cereus protein BC1842	1ylf	2.7	118	20	13.9

S. aureus, Staphylococcus aureus; L. innocua, Listeria innocua; B. cereus, Bacillus cereus.

^*Structure-based sequence alignment, as calculated by Dali server (http://ekhidna.biocenter.helsinki.fi/dali_server/start) (60).