Open AccessAnalysis of the DNA damage‐mediated induction of Psuedomonas putida and Pseudomonas aeruginosa lexA genes
Author(s) -
Calero Sebastián,
Garriga Xavier,
Barbé Jordi
Publication year - 1993
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.1993.tb06296.x
Subject(s) - repressor lexa , pseudomonas aeruginosa , pseudomonas putida , gene , microbiology and biotechnology , biology , dna damage , sos response , dna , genetics , bacteria , repressor , gene expression
A fusion between the lexA gene of Psuedomonas aeruginosa and Psuedomonas putida and the lacZ gene was constructed in vitro and cloned in a mini‐Tn5 transposon derivative to obtain chromosomal insertions which enable to quantitatively examine their transcriptional regulation in both Pseudomonas and E. coli . Analysis of DNA damage‐mediated induction of these lexA‐lacZ fusions showed that expression of P. putida and P. aeruginosa lexA genes was always higher and earlier than the expression of the lexA gene of E. coli . Furthermore, and in contrast to the lexA gene fusion of E. coli , the rates and extent of the induction of lexA gene fusion of P. putida and P. aeruginosa were largely independent of the UV doses applied. The behaviour of the lexa‐lacZ fusions of two Pseudomonas species was the same regardless of whether they were inserted into their own chromosome or into E. coli .