scholarly journals Induction of Cell Division in a Temperature-sensitive Division Mutant of Escherichia coli by Inhibition of Protein Synthesis

1977 ◽  
Vol 99 (2) ◽  
pp. 283-290 ◽  
Author(s):  
M. A. De Pedro ◽  
J. L. CAnovas
Keyword(s):  
Escherichia Coli ◽  
Protein Synthesis ◽  
Cell Division ◽  
Temperature Sensitive ◽  
Inhibition Of Protein Synthesis

scholarly journals Lethal Action of Quinolones against a Temperature-Sensitive dnaB Replication Mutant of Escherichia coli

2006 ◽  
Vol 50 (1) ◽  
pp. 362-364 ◽  
Author(s):  
Xilin Zhao ◽  
Muhammad Malik ◽  
Nymph Chan ◽  
Alex Drlica-Wagner ◽  
Jian-Ying Wang ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Protein Synthesis ◽  
Dna Replication ◽  
Nalidixic Acid ◽  
Temperature Sensitive ◽  
Wild Type ◽  
Lethal Action ◽  
Inhibition Of Protein Synthesis

ABSTRACT Inhibition of DNA replication in an Escherichia coli dnaB-22 mutant failed to block quinolone-mediated lethality. Inhibition of protein synthesis by chloramphenicol inhibited nalidixic acid lethality and, to a lesser extent, ciprofloxacin lethality in both dnaB-22 and wild-type cells. Thus, major features of quinolone-mediated lethality do not depend on ongoing replication.

scholarly journals LOCALIZED MUTAGENESIS FOR THE ISOLATION OF TEMPERATURE-SENSITIVE MUTANTS OF ESCHERICHIA COLI AFFECTED IN PROTEIN SYNTHESIS

Genetics ◽  
1979 ◽  
Vol 91 (2) ◽  
pp. 215-227
Author(s):  
W Scott Champney
Keyword(s):  
Escherichia Coli ◽  
Protein Synthesis ◽  
Temperature Sensitive ◽  
Chromosomal Locus ◽  
Ribosomal Subunits ◽  
Prolonged Incubation ◽  
Temperature Sensitive Mutants ◽  
Inhibition Of Growth ◽  
Localized Mutagenesis

ABSTRACT Two variations of the method of localized mutagenesis were used to introduce mutations into the 72 min region of the Escherichia coli chromosome. Twenty temperature-sensitive mutants, with linkage to markers in this region, have been examined. Each strain showed an inhibition of growth in liquid medium at 44°, and 19 of the mutants lost viability upon prolonged incubation at this temperature. A reduction in the rate of in vivo RNA and protein synthesis was observed for each mutant at 44°, relative to a control strain. Eleven of the mutants were altered in growth sensitivity or resistance to one or more of three ribosomal antibiotics. The incomplete assembly of ribosomal subunits was detected in nine strains grown at 44°. The characteristics of these mutants suggest that many of them are altered in genes for translational or transcriptional components, consistent with the clustering of these genes at this chromosomal locus.

Cysteine homeostasis under inhibition of protein synthesis in Escherichia coli cells

Amino Acids ◽  
2019 ◽  
Vol 51 (10-12) ◽  
pp. 1577-1592 ◽  
Author(s):  
Galina V. Smirnova ◽  
Aleksey V. Tyulenev ◽  
Kseniya V. Bezmaternykh ◽  
Nadezda G. Muzyka ◽  
Vadim Y. Ushakov ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Protein Synthesis ◽  
Escherichia Coli Cells ◽  
Inhibition Of Protein Synthesis

scholarly journals The action of streptomycin in a mutant of Escherichia coli with increased sensitivity to the antibiotic

1970 ◽  
Vol 118 (4) ◽  
pp. 659-666 ◽  
Author(s):  
G. Turnock
Keyword(s):  
Escherichia Coli ◽  
Protein Synthesis ◽  
Normal Cell ◽  
Permeability Barrier ◽  
Bactericidal Action ◽  
Site Of Action ◽  
Inhibition Of Protein Synthesis ◽  
Increased Sensitivity ◽  
Lag Period

A mutant of Escherichia coli with increased sensitivity to streptomycin has been studied. This strain differed from a normal strs strain in that streptomycin produced inhibition of protein synthesis and loss of viability with almost no lag period. Chloramphenicol protected a normal strs strain but not the mutant against the bactericidal action of streptomycin. The results obtained support the idea that access of streptomycin to its site of action in a normal cell is restricted, and that this restriction, which is much less effective in the mutant, probably involves a permeability barrier. Comparison of the inhibition of protein synthesis by streptomycin with concomitant changes in the distribution of polyribosomes in both strains suggested that the antibiotic can directly inhibit the translation of mRNA.

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