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Construction of hybrid plasmids containing the lysA gene of Escherichia coli: Studies of expression in Escherichia coli and Saccharomyces cerevisiae

✍ Scribed by Chenais, Joël ;Richaud, Catherine ;Ronceray, Jeanine ;Cherest, Hélène ;Surdin-Kerjah, Yolande ;Patte, Jean-Claude

Publisher
Springer
Year
1981
Tongue
English
Weight
639 KB
Volume
182
Category
Article
ISSN
0026-8925

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✦ Synopsis

The lysA gene of Escherichia coli has been cloned from a lambda transducing phage on various plasmids, present in different copy numbers in bacterial cells. Synthesis of the product of this gene, diaminopimelate (DAP)-decarboxylase, and its regulation have been studied. Expression does not follow a simple gene dosage effect, maximal expression already being obtained with a six-copy plasmid. This result suggests that either a positive or an autogenous regulatory mechanism is involved. We also used one of the hybrid plasmids to look for expression of the bacterial lysA gene in Saccharomyces cerevisiae. The results indicate that the product of the E. coli gene is not actively translated in yeast.

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