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J Bacteriol. 1994 March; 176(6): 1683-1688

research-article

An efficient Shine-Dalgarno sequence but not translation is necessary for lacZ mRNA stability in Escherichia coli.

Department of Human Genetics, University of Utah, Salt Lake City 84132.

ABSTRACT

The 5' ends of many bacterial transcripts are important in determining mRNA stability. A series of Shine-Dalgarno (SD) sequence changes showed that the complementarity of the SD sequence to the anti-SD sequence of 16S rRNA correlates with lacZ mRNA stability in Escherichia coli. Several initiation codon changes showed that an efficient initiation codon is not necessary to maintain lacZ mRNA stability. A stop codon in the 10th codon of lacZ increased mRNA stability. Therefore, ribosomal binding via the SD sequence but not translation of the coding region is necessary to maintain lacZ mRNA stability.

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