The structure of the deacetylase domain of Escherichia coli PgaB, an enzyme required for biofilm formation: a circularly permuted member of the carbohydrate esterase 4 family

Nishiyama, T.; Noguchi, H.; Yoshida, H.; Park, S.-Y.; Tame, J.R.H.

doi:10.1107/S0907444912042059

Figure 3
A stereo figure of the 2mF_o - DF_c electron-density map for the refined model covering the active site. Electron density is shown at a level of 1 [sigma]

. The zinc ion is shown as a grey sphere and water molecules are shown as red spheres. The acetate ion coordinating the zinc ion is clearly visible in the density map and is found to hydrogen-bond to the conserved His55. The conserved LTXDDG motif of the NodB domain includes Asp114 and Asp115.