Article (Scientific journals)
A common system controls the induction of very different genes. The class-A beta-lactamase of Proteus vulgaris and the enterobacterial class-C beta-lactamase.
Datz, M; Joris, Bernard; Azab, E A et al.
1994In European Journal of Biochemistry, 226 (1), p. 149-57
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Keywords :
Amino Acid Sequence; Base Sequence; Cloning, Molecular; DNA, Bacterial; Enzyme Induction; Escherichia coli/genetics; Genes, Bacterial; Genetic Complementation Test; Molecular Sequence Data; Proteus vulgaris/enzymology/genetics; Sequence Homology, Nucleic Acid; Signal Transduction; Transcription, Genetic; beta-Lactamases/biosynthesis/genetics/metabolism
Abstract :
[en] Among the Enterobacteriaceae, Proteus vulgaris is exceptional in the inducible production of a 29-kDa beta-lactamase (cefuroximase) with an unusually high activity towards the beta-lactamase-stable oximino-cephalosporins (e.g. cefuroxime and cefotaxime). Sequencing of the corresponding gene, cumA, showed that the derived CumA beta-lactamase belonged to the molecular class A. The structural gene was under the direct control of gene cumR, which was transcribed backwards and whose initiation codon was 165 bp away from that of the beta-lactamase gene. This resembled the arrangement of structural and regulator genes ampC and ampR of the 39-kDa molecular-class-C beta-lactamase AmpC present in many enterobacteria. Moreover, cloned genes ampD and ampG for negative modulation and signal transduction of AmpC beta-lactamase induction, respectively, were also able to restore constitutively CumA overproducing and non-inducible P. vulgaris mutants to the inducible, wild-type phenotype. The results indicate that controls of the induction phenomena are equivalent for the CumA and AmpC beta-lactamase. Very different structural genes can thus be under the control of identical systems.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Datz, M
Joris, Bernard ;  Université de Liège - ULiège > Département des sciences de la vie > Physiologie et génétique bactériennes
Azab, E A
Galleni, Moreno ;  Université de Liège - ULiège > Département des sciences de la vie > Macromolécules biologiques
Van Beeumen, J
Frère, Jean-Marie ;  Université de Liège - ULiège > Centre d'ingénierie des protéines
Martin, H H
Language :
English
Title :
A common system controls the induction of very different genes. The class-A beta-lactamase of Proteus vulgaris and the enterobacterial class-C beta-lactamase.
Publication date :
1994
Journal title :
European Journal of Biochemistry
ISSN :
0014-2956
eISSN :
1432-1033
Publisher :
Blackwell Science, Oxford, United Kingdom
Volume :
226
Issue :
1
Pages :
149-57
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 21 May 2012

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