CTX-M-131 is a natural Asp240Gly variant from the CTX-M-2 group detected in a Providencia rettgeri clinical strain from Brazil. Molecular analysis showed that blaCTX-M-131 was inserted in a complex class 1 integron harbored by a 112-kb plasmid, which has not been previously described as a platform for CTX-M-encoding genes with the Asp240Gly mutation. Steady-state kinetic parameters showed that the enzyme has a typical cefotaximase catalytic profile and an enhanced activity against ceftazidime.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4325771 | PMC |
| http://dx.doi.org/10.1128/AAC.04116-14 | DOI Listing |
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Molecular and biochemical characterization of CTX-M-131, a natural Asp240Gly variant derived from CTX-M-2, produced by a Providencia rettgeri clinical strain in São Paulo, Brazil.
Antimicrob Agents Chemother
March 2015
School of Pharmacy and Biochemistry, University of Buenos Aires, Buenos Aires, Argentina.
CTX-M-131 is a natural Asp240Gly variant from the CTX-M-2 group detected in a Providencia rettgeri clinical strain from Brazil. Molecular analysis showed that blaCTX-M-131 was inserted in a complex class 1 integron harbored by a 112-kb plasmid, which has not been previously described as a platform for CTX-M-encoding genes with the Asp240Gly mutation. Steady-state kinetic parameters showed that the enzyme has a typical cefotaximase catalytic profile and an enhanced activity against ceftazidime.
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