[Effect of plasmid pKM101 on the expression of bacterial genes not related to DNa metabolism]. / Deistvie plazmidy pKM101 na ékspressiiu bakterial'nykh genov, ne imeiushchikh otnosheniia k metabolizmu DNK.
Genetika
; 35(2): 170-7, 1999 Feb.
Article
en Ru
| MEDLINE
| ID: mdl-10495935
An experimental system ensuring fusion of bacterial genes to the lac operon of the Mu dl(Aplac) phage was used. Fusion operons in which the lac operon was under the control of promoters of the elt gene, responsible for synthesis of the LT toxin, of the tetracyclin-resistance tet gene, and sfiA gene encoding filament production, was studied. Using this experimental system, plasmid pKM101 was shown to be capable of activating the expression of the above Escherichia coli and Salmonella typhimurium genes, which is manifested as the activation of beta-galactosidase synthesis. The activation of the elt gene expression by the pKM101 plasmid was also confirmed in experiments on detecting the LT toxin synthesized by bacteria carrying this plasmid. Effect of the plasmid on the activation of elt operon expression, unlike the effect of this plasmid on mutability, does not depend on the functioning of the lexA and recA genes, i.e., this is not a SOS-regulated process. The mutant plasmid pGW12, a derivative of pKM101, deficient in the mucAB genes responsible for mutagenesis, causes a more pronounced activation of the elt gene than plasmid pKM101.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Plásmidos
/
Salmonella typhimurium
/
Regulación Bacteriana de la Expresión Génica
/
Escherichia coli
/
Genes Bacterianos
Idioma:
Ru
Revista:
Genetika
Año:
1999
Tipo del documento:
Article
País de afiliación:
Rusia
Pais de publicación:
Rusia