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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Penicillanic acid sulfone: nature of irreversible inactivation of RTEM beta-lactamase from Escherichia coli.

When penicillanic acid sulfone in large molar excess is incubated with the RTEM beta-lactamase, the enzyme becomes inactivated irreversibly. From studies of the consequential spectroscopic changes, from the use of specifically tritiated penicillanic acid sulfone, and from comparison by isoelectric focusing of the enzyme after inactivation by the sulfone and by clavulanic acid, the inactivated enzyme appears to be cross-linked by a beta-aminoacrylate fragment deriving from C-5, C-6, and C-7 of the original beta-lactam. Model studies on the behavior of alcoholic solutions of penicillanic acid sulfone in the presence of amines are entirely consistent with this interpretation.[1]

References

  1. Penicillanic acid sulfone: nature of irreversible inactivation of RTEM beta-lactamase from Escherichia coli. Brenner, D.G., Knowles, J.R. Biochemistry (1984) [Pubmed]
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