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. 2020 May 4;16(5):e1008342. doi: 10.1371/journal.ppat.1008342

Fig 2. Crystal structure of ChiA-CTD.

Fig 2

(A) Cartoon representation of ChiA-CTD with secondary structure and extended loops annotated. Additional ChiA-CTD α3-helix is highlighted with a red asterisk. (B) Stick representation of the ChiA-CTD active site (green) superimposed with ChiNCTU2 E145G/Y227F mutant (grey) in complex with chitotetraose (yellow) (PDB ID code 3n18) [27]. Mutated residues in ChiNCTU2 are indicated and carbohydrate positions relative to the hydrolysed glycosidic bond are numbered. (C) Model of ChiA-CTD shown as cartoon and (D) electrostatic surface potential, bound to chitotetraose drawn as spheres.