Characterization of the chromosomal class A beta-lactamase CKO from Citrobacter koseri.
FEMS Microbiol Lett
; 254(2): 285-92, 2006 Jan.
Article
em En
| MEDLINE
| ID: mdl-16445758
ABSTRACT
The gene bla(CKO) encoding the chromosomal class A beta-lactamase of Citrobacter koseri was cloned and sequenced. CKO was found to display only 41% identity with SED-1 from Citrobacter sedlakii and 36% with CdiA from Citrobacter amalonaticus (formerly Citrobacter diversus). No transcriptional regulator was found upstream from bla(CKO). Silent and missense mutations were detected in four bla(CKO) genes amplified from different C. koseri clinical isolates, but the CKO variants displayed identical biochemical behaviours. A bla(CKO)-specific polymerase chain reaction confirmed that bla(CKO) is present only in C. koseri and therefore represents an interesting tool with which to differentiate C. koseri from the other Citrobacter spp.
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Base de dados:
MEDLINE
Assunto principal:
Beta-Lactamases
/
Cromossomos Bacterianos
/
Citrobacter koseri
Limite:
Humans
Idioma:
En
Ano de publicação:
2006
Tipo de documento:
Article