Studies on the alteration of chromosome copy number and cell division potential in a dnaA mutant of Escherichia coli

1991 ◽  
Vol 229 (2) ◽  
pp. 175-180 ◽  
Author(s):  
Joe A. Fralick
Keyword(s):  
Escherichia Coli ◽  
Cell Division ◽  
Copy Number ◽  
Dnaa Mutant ◽  
Chromosome Copy Number

Heat stress in the presence of low RNA polymerase activity increases chromosome copy number in Escherichia coli

1988 ◽  
Vol 212 (2) ◽  
pp. 203-206 ◽  
Author(s):  
Elena C. Guzman ◽  
Alfonso Jimenez-Sanchez ◽  
Elisha Orr ◽  
Robert H. Pritchard
Keyword(s):  
Escherichia Coli ◽  
Heat Stress ◽  
Rna Polymerase ◽  
Copy Number ◽  
Polymerase Activity ◽  
Chromosome Copy Number ◽  
Rna Polymerase Activity

scholarly journals MexAB-OprM Efflux Pump Interaction with the Peptidoglycan of Escherichia coli and Pseudomonas aeruginosa

2021 ◽  
Vol 22 (10) ◽  
pp. 5328
Author(s):  
Miao Ma ◽  
Margaux Lustig ◽  
Michèle Salem ◽  
Dominique Mengin-Lecreulx ◽  
Gilles Phan ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Pseudomonas Aeruginosa ◽  
Cell Division ◽  
Membrane Proteins ◽  
Outer Membrane ◽  
Efflux Pump ◽  
Gram Negative Bacteria ◽  
Gram Negative ◽  
Active Efflux

One of the major families of membrane proteins found in prokaryote genome corresponds to the transporters. Among them, the resistance-nodulation-cell division (RND) transporters are highly studied, as being responsible for one of the most problematic mechanisms used by bacteria to resist to antibiotics, i.e., the active efflux of drugs. In Gram-negative bacteria, these proteins are inserted in the inner membrane and form a tripartite assembly with an outer membrane factor and a periplasmic linker in order to cross the two membranes to expulse molecules outside of the cell. A lot of information has been collected to understand the functional mechanism of these pumps, especially with AcrAB-TolC from Escherichia coli, but one missing piece from all the suggested models is the role of peptidoglycan in the assembly. Here, by pull-down experiments with purified peptidoglycans, we precise the MexAB-OprM interaction with the peptidoglycan from Escherichia coli and Pseudomonas aeruginosa, highlighting a role of the peptidoglycan in stabilizing the MexA-OprM complex and also differences between the two Gram-negative bacteria peptidoglycans.

scholarly journals Sex differences in circadian food anticipatory activity are not altered by individual manipulations of sex hormones or sex chromosome copy number in mice

PLoS ONE ◽  
2018 ◽  
Vol 13 (1) ◽  
pp. e0191373 ◽  
Author(s):  
Antonio Aguayo ◽  
Camille S. Martin ◽  
Timothy F. Huddy ◽  
Maya Ogawa-Okada ◽  
Jamie L. Adkins ◽  
...  
Keyword(s):  
Sex Differences ◽  
Sex Hormones ◽  
Copy Number ◽  
Sex Chromosome ◽  
Chromosome Copy Number ◽  
Food Anticipatory Activity ◽  
Anticipatory Activity
Sign in / Sign up

Export Citation Format

Share Document