PMID:6355771

Bloxham, DP, Herbert, CJ, Giles, IG and Ner, SS (1983) The use of bacteriophage M13 carrying defined fragments of the Escherichia coli gltA gene to determine the location and structure of the citrate synthase promoter region.Mol. Gen. Genet. 191:499-506

Abstract

The gltA gene from Escherichia coli, which encodes citrate synthase, has been located on a 3.24 Kb HindIII/EcoRl restriction fragment. This region contains one restriction site for BamHl and two for BglII. Defined restriction fragments from this region were cloned into suitably cleaved replicative form M13mp8 and M13mp9. The recombinants (M13gtlA1 leads to 10) were isolated as single stranded DNA and characterised on the basis of molecular weight and DNA sequence. The single stranded DNA was converted to the double stranded replicative form and used to transform E. coli strain JM103 from which bacteriophage were isolated. Infection of JM103 with different bacteriophage followed by measurement of expressed citrate synthase activity showed that the complete gltA gene must span the BamHl restriction site, that the control region was on the 5'-terminal side of this restriction site and that the coding region for citrate synthase protein commenced on the 3'-terminal side. Analysis of the DNA sequence of this region allowed us to confirm this model, to identify the start sequence for translation of the structural gene and a number of sequences controlling the initiation of transcription. Of special interest is the fact that there must be an extensive leader sequence (305 nucleotides) separating the predicted sites for initiation of transcription and translation.

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