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Figure 3
A cellotetraose molecule from the CtCbhA mutant E795Q (PDB entry 1rq5) fitted into the active site of the crystal structure of J30 wt. The individual rings are marked +2 to −2 according to their relative position with respect to the glycosidic bond that would be cleaved by the action of the side chains of Asp147 and Glu523 (labeled in red). Dashes denote hydrogen bonds immediately involved in the nucleophilic attack of the hydrolyzing water molecule (red sphere). The engineered Zn2+ site is at the bottom right and is shown with gray labels. The residue-label font sizes reflect the proximity to the viewer.

Journal logoSTRUCTURAL
BIOLOGY
ISSN: 2059-7983
Volume 74| Part 7| July 2018| Pages 702-710
https://doi.org/10.1107/S2059798318006678
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