Linked Life Data

1429334

Source:http://linkedlifedata.com/resource/pubmed/id/1429334

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1992-12-10
pubmed:abstractText
In clinical isolates of Klebsiella oxytoca resistance to cefuroxime and aztreonam was mediated by a beta-lactamase, designated KH, (pI 5.25) which could be transferred into Escherichia coli by electroporation, but not by conjugation. The transformants produced two enzymes with pIs 5.25 and 8.4 respectively, and showed resistance to cefuroxime, aztreonam, cefotaxime and ceftazidime. Substrate and inhibition profiles indicated that KH beta-lactamase was different from TEM- or SHV-like enzymes, but similar to chromosomal K1 beta-lactamase. The enzyme profile with pI 8.4 was similar to the enzyme from the recipient and showed elevated activity in transformants. The plasmid profiles of the transformants were different from those of their donors. However, a plasmid fragment of the K. oxytoca isolate KH11 hybridized with a plasmid ranging in size from 4.8 to 7.8 kilobases in all the transformants and most of the donors. Gene probes encoding TEM-1 or SHV-1 did not hybridize with plasmid DNA from the K. oxytoca isolates. Furthermore, a probe of the ampC gene did not hybridize with the plasmid but to DNA fragments of the same size in whole cell DNA preparations from the E. coli XAC recipient and the TKH11 transformants. This indicates that no gross rearrangements in the chromosomal beta-lactamase gene region had occurred in the transformants which could explain the increased expression of the pI 8.4 beta-lactamase.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0305-7453
pubmed:author
pubmed:issnType
Print
pubmed:volume
30
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
3-16
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1992
pubmed:articleTitle
Extended spectrum beta-lactamase from Klebsiella oxytoca, not belonging to the TEM or SHV family.
pubmed:affiliation
Department of Clinical Microbiology, Karolinska Hospital, Stockholm, Sweden.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't