Genetic and Biochemical Investigation of the Escherichia coli Mutant hfl-1 Which is Lysogenized at High Frequency by Bacteriophage Lambda
AUTOR(ES)
Belfort, Marlene
RESUMO
The Escherichia coli mutant hfl-1 is lysogenized at very high frequency by bacteriophage lambda. The normal requirement for the λcIII gene product in the establishment of repression is not observed in hfl-1 strains. These phenotypic characteristics are specified by a single locus at 82.5 min on the E. coli map in extremely close proximity to the purA gene, cotransduction frequencies ranging from 97 to 100% depending on the particular purA marker used. The lactose operon is shown to function normally in this strain, and there are also no demonstrable differences in ribonucleic acid polymerase activity or cyclic-adenosine monophosphate levels. Alterations in the cell envelope are indicated by a slight rifamycin resistance, which is reversible by pretreating the cells with ethylenediaminetetraacetic acid, and by a resistance to penicillin and a sensitivity to high concentrations of sodium dodecyl sulfate. It is not known whether this change in cell surface is the primary lesion, or a pleiotropic effect of some more basic metabolic shift.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=246243Documentos Relacionados
- Genetic and physical location of the Escherichia coli rap locus, which is essential for growth of bacteriophage lambda.
- Identification of polypeptides encoded by an Escherichia coli locus (hflA) that governs the lysis-lysogeny decision of bacteriophage lambda.
- Lambda CIN-1, a New Mutation Which Enhances Lysogenization by Bacteriophage Lambda, and the Genetic Structure of the Lambda CY Region
- Mutant of Escherichia coli that instantaneously loses the ability to adsorb lambda bacteriophage upon exposure to high temperature.
- Proteolysis of Bacteriophage λ CII by Escherichia coli FtsH (HflB)