Pyrimidine Pools and Macromolecular Composition of Pyrimidine-Limited Escherichia coli
AUTOR(ES)
Dennis, Patrick P.
RESUMO
The growth rate of a pyrimidine-requiring strain was controlled by limiting the concentration of exogenous orotic acid. As the steady state, pyrimidine-limited growth rate was decreased, the intracellular pyrimidine pools and the total nucleic acid per unit mass of culture also decreased. The ratio of deoxyribonucleic acid to protein remained constant, whereas the ratio of ribonucleic acid to protein decreased 30% over a threefold variation in growth rate (50- to 150-min doubling times). The intracellular uridine triphosphate and cytosine triphosphate pools also decreased (although not coordinately), and the pyrimidine biosynthetic enzymes were derepressed. Cell size was unaffected by pyrimidine-mediated variation of the growth rate.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=284976Documentos Relacionados
- Control of Deoxyribonucleic Acid and Ribonucleic Acid Synthesis in Pyrimidine-Limited Escherichia coli
- Growth and Macromolecular Composition of a Mutant of Escherichia coli During Polyamine Limitation
- Macromolecular Composition During Steady-State Growth of Escherichia coli B/r
- Nucleoside triphosphate pools in minicells of Escherichia coli.
- Effect of Trimethoprim on Macromolecular Synthesis in Escherichia coli
