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The crystallographic structure of ACT-1, which is the first plasmid-mediated AmpC-type β-lactamase to have been completely analyzed in terms of nucleotide sequence and which has a high degree of sequence similarity to the chromosomal AmpC enzymes of Enterobacter cloacae and the plasmid-encoded MIR-1, has been solved at 2.4 Å resolution. The overall structure of ACT-1 is similar to those of other class C β-lactamases, such as the AmpC enzymes from E. cloacae P99 and Escherichia coli.
Keywords: AmpC; ACT-1; β-lactamases.

Supporting information

PDB reference: Class C β-lactamase ACT-1, 2zc7, r12zc7sf


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