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. Author manuscript; available in PMC: 2016 Feb 20.
Published in final edited form as: Mol Biosyst. 2014 Nov 24;11(2):338–353. doi: 10.1039/c4mb00627e

Figure 3. Mechanism for ATP-grasp enzymes.

Figure 3

ATP-grasp enzymes form an acylphosphate intermediate followed by decomposition to CO2 prior to nucleophilic (Nu) attack (path a, Nu = biotin) or formation of a tetrahedral intermediate prior to release of phosphate (path b).