Related Experiment Videos
Penicillin resistance and autolysis in enterococci
L Daneo-Moore1, O Massidda, R Kariyama
1Department of Microbiology and Immunology, Temple University, School of Medicine, Philadelphia, Pennsylvania 19140, USA.
Microbial Drug Resistance (Larchmont, N.Y.)
|April 1, 1996
Summary
The genetic element psr globally regulates bacterial cell wall properties, including lysozyme sensitivity and autolytic capacity. This regulation appears independent, with psr
Area of Science:
- Microbiology
- Bacterial Cell Wall Biology
- Genetics
Background:
- Penicillin-binding proteins (PBPs) are crucial for bacterial cell wall synthesis.
- Alterations in PBP5 expression affect cell wall properties and antibiotic resistance.
- The genetic element 'psr' is investigated for its role in regulating cell wall characteristics.
Purpose of the Study:
- To compare cell wall-related properties between different bacterial strains.
- To elucidate the regulatory role of the 'psr' genetic element.
- To understand the mechanisms behind lysozyme sensitivity and autolytic capacity.
Main Methods:
- Comparative analysis of ATCC 9790, R40 (PBP5 overproducing), and Rev14 (PBP5 deficient) strains.
- Assessment of cell wall-rhamnose-containing polysaccharide content.
- Evaluation of lysozyme sensitivity and autolytic capacity.
Main Results:
- The 'psr' element is implicated in the global regulation of lysozyme sensitivity.
- 'psr' also influences autolytic capacity and wall-rhamnose-containing polysaccharide content.
- These cell wall properties are regulated independently through a system involving 'psr'.
Conclusions:
- The 'psr' genetic element plays a significant role in bacterial cell wall homeostasis.
- The precise mechanism of 'psr' involvement in independent regulation requires further investigation.
- Understanding 'psr' regulation offers insights into bacterial cell wall dynamics and antibiotic resistance.