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Cloning in Escherichia coli of genes involved in the synthesis of proline and leucine in Desulfovibrio desulfuricans Norway

✍ Scribed by Fons, Michel ;Cami, Brigitte ;Patte, Jean-Claude ;Chippaux, Marc


Publisher
Springer
Year
1987
Tongue
English
Weight
339 KB
Volume
206
Category
Article
ISSN
0026-8925

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✦ Synopsis


A library of Desulfovibrio desulfuricans Norway genomic DNA was constructed in Escherichia coli with pBR322 as vector and plasmids able to complement the proA and leuB mutations of the host were screened. It was observed that all the plasmids studied were highly unstable, the insert DNA being rapidly lost under non-selective growth conditions. A 2.75 kb DNA fragment of D. desulfuricans Norway was found to complement E. coli ProA, ProB and ProC deficiencies. From the results of restriction analysis and Southern hybridizations, it is proposed that the genes involved in proline and leucine biosynthesis are clustered on the chromosome of D. desulfuricans Norway.


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