Abstract
Regulation of the expression of the histidase coded by hutk of Klebsiella aerogenes in Salmonella typhimurium and in Escherichia coli and of the expression of the histidase coded by huts of S. typhimurium in E. coli was investigated. The hutk histidase was found to be sensitive to catabolite repression in K. aerogenes and in E. coli, but insensitive to catabolite repression in S. typhimurium; huts histidase has previously been shown to be catabolite sensitive in all three organisms. The expression of both hutk and huts histidase in E. coli was activated by nitrogen starvation. Apparently, the glutamine synthetase of E. coli may activate the formation of some glutamate- and ammonia-producing enzymes.
MeSH Terms
Ammonia-Lyases/biosynthesis
Cell-Free System
Enterobacter/enzymology,metabolism
Enterobacteriaceae/enzymology
Enzyme Repression
Escherichia coli/enzymology,metabolism
Galactosidases/metabolism
Genes
Glucose/metabolism
Glutamate-Ammonia Ligase/metabolism
Histidine Ammonia-Lyase/biosynthesis,metabolism
Hybridization, Genetic
Salmonella typhimurium/enzymology,metabolism
Succinates/metabolism
Tryptophanase/metabolism
Chemicals
Succinates
Galactosidases
Tryptophanase
Ammonia-Lyases
Histidine Ammonia-Lyase
Glutamate-Ammonia Ligase
Glucose
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Goldberg R B
Bloom F R
Magasanik B
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