Expression and regulation of lactose genes carried by plasmids.
AUTOR(ES)
Guiso, N
RESUMO
A number of plasmids carrying the lactose character have been studied. All of the plasmids examined so far code for proteins essential for lactose utilization, i.e., beta-galactosidase and galactoside permease. None of them carries enzymatically or immunologically detectable thiogalactoside transacetylase. The expression of the two enzymes is both negatively and positively controlled: they are inducible by different galactosides and are sensitive to catabolite repression. Since the plasmid-coded lactose systems have many features in common with the Escherichia coli lactose operon, it is suggested that the plasmids could have acquired the lactose genes from an E. coli chromosome.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=232974Documentos Relacionados
- Position effect on expression of dsd genes cloned onto multicopy plasmids.
- Restriction endonuclease analysis of the lactose plasmid in Streptococcus lactis ML3 and two recombinant lactose plasmids.
- Structure, expression, and regulation of the kilC operon of promiscuous IncP alpha plasmids.
- Expression of type 1 fimbriae and mannose-sensitive hemagglutinin by recombinant plasmids.
- The opine synthase genes carried by Ti plasmids contain all signals necessary for expression in plants.