Fig. 4: Time-resolved structures for the subsequent esterification of bound boric acid with glycerol in the active site of CTX-M-14. | Communications Chemistry

Fig. 4: Time-resolved structures for the subsequent esterification of bound boric acid with glycerol in the active site of CTX-M-14.

From: Time-resolved crystallography of boric acid binding to the active site serine of the β-lactamase CTX-M-14 and subsequent 1,2-diol esterification

Fig. 4: Time-resolved structures for the subsequent esterification of bound boric acid with glycerol in the active site of CTX-M-14.

Polder electron densities (contoured at 5 σ, green mesh) of the active site region of CTX-M-14. Microcrystals pre-soaked with boric acid and mixed with glycerol prior to serial diffraction data collection applying the TapeDrive setup at beamline P11, PETRA III/DESY, observing time-resolved the ester bond formation between glycerol and the Ser70 borate ester. The sulfate anion present in the native conformation is displaced upon binding of GBE and finally replaced by solvent water OW357. BAB and GBE oxygen atoms are labeled in red. Potential hydrogen bond distances (Å) are indicated by dashed lines.

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