Isolation and characterization of nondefective transducing lambda bacteriophages carrying fla genes of Escherichia coli K-12.
AUTOR(ES)
Kondoh, H
RESUMO
In Escherichia coli K-12, 11 fla genes and a hag gene are located between his and uvrC, making two clusters at map positions 42.5 and 43.0 min. Nondefective transducing lambda phages for these genes were isolated. Low-frequency-transducing donors were constructed starting from lysogens of lambda cI857 in which the prophage is integrated at a secondary attachment site at 44 min on the E. coli map. Two strategies were used to delete the region between the prophage and the fla genes. Deletion mutants of the supD locus between fla and the prophage were isolated by selecting for loss of Su1+, an allele of supD. A strain with a deletion starting within the prophage and ending at a position close to the fla genes was isolated from heat-resistant derivatives of the lysogen. A lysogen of lambda b2 was then constructed in which the prophage had integrated at the site of the defective prophage by means of recombination with residual lambda deoxyribonucleic acid. From low-frequency-transducing lysate of the donor strains thus constructed, either directly or in combination with a procedure that extends the loci transduced, various lambda pfla's were isolated. lambda pflaL1 carries all nine fla genes at 43 min, and lambda pflaH14 carries hag and two fla genes at 42.5 min.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=235275Documentos Relacionados
- Isolation of specialized lambda transducing bacteriophages for flagellar genes (fla) of Escherichia coli K-12.
- Isolation and characterization of lambda specialized transducing bacteriophages carrying Klebsiella pneumoniae nif genes.
- Isolation of specialized transducing bacteriophages carrying the structural genes of the hexuronate system in Escherichia coli K-12: exu region.
- Specialized transducing bacteriophage lambda carrying the structural gene for a major outer membrane matrix protein of Escherichia coli K-12.
- Isolation of specialized transducing bacteriophages carrying deletions of the regulatory region of the Escherichia coli K-12 tryptophan operon.