Musltiple alignment trans_reg_C domain in CusR of K. pneumoniae KW along with related protein sequences found in CDD. In REC domain, residues contributing active site are highlighted with yellow colour while phosphorylation site, dimerization interface and intermolecular recognition site are boxed with black, orange and red boundaries, respectively. In trans_reg_C domain, residues involved in DNA binding are highlighted with green colour.