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• W1908308709 endingPage "2557" @default.
• W1908308709 startingPage "2547" @default.
• W1908308709 abstract "The promoter, operator, and 5' and 3' ends of the mRNA of the Escherichia coli gene aroG (encoding the phenylalanine-sensitive 3-deoxy-arabinoheptulosonate-7-phosphate synthase) were located. Primer extension analysis and nuclease S1 mapping of in vivo transcripts were used to determine the 5' and 3' ends, respectively, of the mRNA. Both ends exhibited some heterogeneity with respect to length. The 3' end of the major molecular species was located within a region that has structural homology with known rho-independent terminators. The location of the aroG promoter was identified in both strands of the DNA by in vitro DNase I footprinting and methylation protection experiments with RNA polymerase. In these experiments, a region of up to 80 base pairs (bp) was protected by the binding of RNA polymerase. The location of the aroG operator was also identified in both strands of the DNA by in vitro DNase I footprinting with pure TyrR. TyrR protected 26 to 28 bp of DNA containing a 22-bp palindrome (TYR R box) and overlapping the -35 region of the promoter. Mutations in the aroG regulatory DNA were isolated by site-directed mutagenesis and cloned in a low-copy-number plasmid to generate aroG-lac fusions. The effects of the mutations on the regulation of aroG expression were determined by measuring the beta-galactosidase activities of the fusions in strains with tyrR, tyrR+, and multicopy tyrR+ genotypes. The results of this mutant analysis confirmed that the aroG operator contains a single TYR R box." @default.
• W1908308709 created "2016-06-24" @default.
• W1908308709 creator A5003716134 @default.
• W1908308709 creator A5038986542 @default.
• W1908308709 creator A5046107573 @default.
• W1908308709 date "1990-05-01" @default.
• W1908308709 modified "2023-10-15" @default.
• W1908308709 title "Identification of the promoter, operator, and 5' and 3' ends of the mRNA of the Escherichia coli K-12 gene aroG" @default.
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• W1908308709 doi "https://doi.org/10.1128/jb.172.5.2547-2557.1990" @default.
• W1908308709 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/208896" @default.
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