Fig. 1

3D structure of BlaR-CTD protein (a) and interaction with cefquinome (b). a The 3D structure of BlaR-CTD was represented as a cartoon, with α-helices colored in cyan, β-strands in magenta, and loops in salmon. The active sites of Ser55, Ser103, Thr105 and Thr195 were colored in yellow. b The amino acid residues involved in the interaction of BlaR-CTD with cefquinome. The hydrogen bonds were represented as black dotted lines. The cefquinome molecule was colored in gray. The AAs of the active site were colored in yellow