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. 2020 Oct 7;11:561317. doi: 10.3389/fmicb.2020.561317

FIGURE 1.

FIGURE 1

The KPC-55 protein in comparison with the prototype KPC-2. Top, the active site and binding site of the KPC enzyme corresponding to the 2OV5 protein database structure (Ke et al., 2007). Two hinge regions, the Ω loop and the substrate binding site, are indicated in the amino acid sequences in orange, green, and red, respectively. Middle, the sequence of KPC-55 compared with that of KPC-2 is presented. The Y264N alteration is illustrated with a red dot. Bottom, secondary structure of KPC-2 indicating β-sheets in light yellow and α-helices in dark red (Ke et al., 2007).