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Catabolite Repression During Single and Multiple Induction in Escherichia Coli

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Publisher Springer
Specialty Microbiology
Date 1981 Jan 1
PMID 6259031
Citations 1
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Abstract

Intracellular concentration of cAMP regulates the synthesis of enzymes sensitive to catabolite repression. The relationship between the single and multiple induction of beta-galactosidase (EC 3.2.1.23), L-tryptophanase (EC 4.1.99.1), D-serine deaminase (EC 4.2.1.14), L-asparaginase (EC 3.5.1.1) and L-malate dehydrogenase (EC 1.1.1.37) was studied and the effect of cAMP level on the induction in Escherichia coli Crookes (ATCC 8739) was investigated. A varying degree of catabolite repression was observed during induction of individual enzymes induced separately on different energy sources. The synthesis of l-tryptophanase was most sensitive, whereas l-asparaginase was not influenced at all. Exogenous cAMP was found to overcome partially the catabolite repression of beta-galactosidase and D-serine deaminase, both during single induction. The synthesis of l-malate dehydrogenase was negatively influenced by the multiple induction even in the presence of cAMP; on the other hand, the synthesis of l-tryptophanase was stimulated, independently of the level of the exogenous cAMP. Similarly, the activity of L-asparaginase slightly but significantly increased during the multiple induction of all five enzymes; here too the activity increase did not depend on exogenous cAMP.

Citing Articles

Catabolite repression of different inducible enzymes in Escherichia coli and the effect of cAMP.

Jiresova M, Janecek J, Naprstek J, Spizek J, Dobrova Z Folia Microbiol (Praha). 1981; 26(4):265-9.

PMID: 6269972 DOI: 10.1007/BF02927249.

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