The glyoxalase system consists of two enzymes, glyoxalase I and glyoxalase II. This system is important in the detoxification of methylglyoxal. Detailed studies have determined that the glyoxalase I from Escherichia coli, Neisseria meningitidis and Yersinia pestis are maximally activated by Ni2+ and Co2+, and are inactive with Zn2+, a situation quite different from the human glyoxalase I enzyme, which is activated by Zn2+. Recent studies on the Pseudomonas aeruginosa genome have led to the characterization of three different glyoxalase I enzymes, two of which follow a Ni2+/Co2+ activation profile and the third exhibits a human-like preference for Zn2+.
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Sukdeo et al. (2008) studied this question.
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