Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 1 de 1
Filtrar
Mais filtros











Base de dados
Intervalo de ano de publicação
1.
J Bacteriol ; 177(22): 6684-7, 1995 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-7592453

RESUMO

Analysis of the chromosomic beta-galactosidase activity in strains of Escherichia coli with and without plasmids indicated that plasmid maintenance enhances gene expression. Cyclic AMP (cAMP) determinations confirmed that the gene enhancement observed in strains carrying plasmids was due to a small increase in the intracellular concentration of cAMP. Also, cells carrying plasmids displayed higher specific glucose uptake rates than did cells without plasmids. The increases in the expression of beta-galactosidase and the glucose uptake rate suggest a cAMP-mediated release of the glucose effect due to plasmid maintenance. Our results suggested that this effect is independent of the host and type and number of plasmids.


Assuntos
Escherichia coli/metabolismo , Regulação Bacteriana da Expressão Gênica/fisiologia , Plasmídeos/fisiologia , AMP Cíclico/análise , Escherichia coli/enzimologia , Escherichia coli/genética , Escherichia coli/crescimento & desenvolvimento , Glucose/metabolismo , beta-Galactosidase/metabolismo
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA