Figure 4
From: DNA binding by Corynebacterium glutamicum TetR-type transcription regulator AmtR
Homology model of the AmtR repressor-operator complex. (A) Three-dimensional model of AmtR DNA binding domain in complex with DNA. The two binding sites of dimeric AmtR are shown separately on the left and right half of the picture. The protein is depicted in backbone presentation and sequence positions that were experimentally investigated are shown as balls. The DNA backbone is shown as grey ribbon and the bases are colored according to their type. (B) Sequence of the AmtR operator indicating the numbering scheme used in the present work. The bases of the conserved "CTAT" recognition motif are explicitly labeled, while the remaining nonconserved bases are denoted as "N".