Wyniki wyszukiwania

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Active stable maintenance functions in low copy-number plasmids of Gram-positive bacteria. II. Post-segregational killing systems

100%

Dmowski M., Jagura-Burdzy G.

Polish Journal of Microbiology

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2013

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tom 62

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nr 1

Active support is needed for low copy-number plasmids to be stably maintained in bacterial cells. The mechanisms that fulfill this role are (i) partition systems (PAR) acting to separate plasmid molecules to daughter cells and (ii) toxin-andidote (TA) (post-segregational killing-PSK) systems which arrest cell growth until the plasmid reaches the correct copy-number or kill the cells that have not inherited the plasmid. Our knowledge of toxin-antidote systems comes mainly from studies on Gram-negative bacteria. However, some addiction systems of Gram-positive bacteria have been characterized in detail or recently identified. Altogether, they bring new interesting data on toxin-antidote functioning in bacteria.

2

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QS - systems communication of Gram-positive bacterial cells

100%

Ziemichod A., Skotarczak B.

Acta Biologica

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2017

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tom 24

3

Ampicillin resistance in Listeria monocytogenes acquired as a result of transposon mutagenesis

100%

Poros-Gluchowska J., Kloszewska M., Markiewicz Z.

Acta Microbiologica Polonica

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2003

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tom 52

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nr 2

4

Biosynthesis of bacterial peptidoglycan

100%

Kloszewska M.

Acta Microbiologica Polonica

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1996

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tom 45

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nr 2

5

Effect of external addition of rhamnolipids biosurfactant on the modification of gram positive and gram negative bacteria cell surfaces during biodegradation of hydrocarbon fuel contamination

84%

Kaczorek E.

Polish Journal of Environmental Studies

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2012

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tom 21

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nr 4

The bacterial strains from the genera: Bacillus, Pseudomonas, Aeromonas, Achromobacter, and Flavimonas isolated from soil contaminated with crude oil were the subject of studies. The effect of the addition of rhamnolipids on cell surface properties and the removal efficiency of diesel oil were investigated. Rhamnolipids caused the modification of cell surface properties of tested strains, which depended on the amount of external additions of biosurfactant. Additionally, the decrease of Zeta potential was observed after the introduction of rhamnolipids to the diesel oil system. Particle size distribution provides information about system homogeneity and the tendency of particles toward agglomeration. Cell surface hydrophobicity during hydrocarbon biodegradation is a dynamic parameter. There were no different effects, after the addition of rhamnolipids, on the Gram positive and Gram negative bacterial strains. Moreover, the addition of rhamnolipids does not always increase the efficiency of diesel oil biodegradation. The most effective bacterial strain in diesel oil removal was the genus Pseudomonas.

6

Active stable maintenance functions in low copy-number plasmids of Gram-positive bacteria. I. Partition systems

84%

Dmowski M., Jagura-Burdzy G.

Polish Journal of Microbiology

|

2013

|

tom 62

|

nr 1

Low copy number plasmids cannot rely on the random segregation during bacterial cell division. To be stably maintained in the population they evolved two types of mechanisms (i) partition systems (PAR) that actively separate replicated plasmid molecules to the daughter cells and (ii) toxin-andidote systems (TA) that act after cell division to kill plasmid-less cells. Our knowledge of partition systems has been based mainly on analysis of plasmids from Gram-negative bacteria. Now, numerous partition systems of plasmids from Gram-positive bacteria have also been characterized and make significant contribution to our understanding of these mechanisms.

7

Molecular basis of quorum sensing signal-response systems in bacteria

84%

Ziemichod A., Skotarczak B.

Acta Biologica

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2017

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tom 24

8

Aerobic microflora of Myotis myotis [Borkhausen, 1797] and Barbastella barbastellus [Schreber, 1774]

84%

Rozalska B., Radzicki G., Sadowska B., Markowski J., Rudnicka W.

Bulletin of the Polish Academy of Sciences. Biological Sciences

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1998

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tom 46

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nr 2

9

Regulatory functions of seryl-phosphorylated HPr in pathogenic bacteria

84%

Deutscher J., Herro R., Poncet S.

Cellular and Molecular Biology Letters

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2005

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tom 10

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nr Suppl.2

10

Current status and future perspectives of DNA vaccine delivery by attenuated intracellular bacteria

84%

Dietrich G.

Archivum Immunologiae et Therapiae Experimentalis

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2000

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tom 48

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nr 3

11

Characterization of Bacillus subtilis clones surviving overproduction of Zeta, a pSM19035 plasmid-encoded toxin

84%

Nowakowska B., Kern-Zdanowicz I., Zielenkiewicz U., Ceglowski P.

Acta Biochimica Polonica

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2005

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tom 52

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nr 1

The postsegregational killing system of pSM19035 plasmid consists of the proteins Zeta and Epsilon, a toxin and an antidote, respectively. Zeta mutants were isolated with the use of Bacillus subtilis strain with the zeta gene under control of an inducible promoter integrated into the chromosome. Results of mutant analysis point to the amino terminal part of the Zeta protein as being responsible for the toxicity.

12

Intestinal MMC-related electric fields and pancreatic juice control the adhesion of gram-positive and gram-negative bacteria to the gut epithelium - in vitro study

67%

Jankowska A., Wrzesinski M., Laubitz D., Kazimierczak W., Skrzypek H., Bardowski J., Zabielski R., Grzesiuk E.

Journal of Physiology and Pharmacology

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2008

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tom 59

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nr 4

795-810

The adhesion of six different Lactobacillus and Lactococcus and three pathogenic Escherichia and Salmonella strains was studied using Caco-2 cell line. In this in vitro model system the influence of weak electric field (EF) on bacterial adhesion was tested. The EF source was the in vitro reconstruction of spiking potentials recorded in the duodenum of a healthy calf during one myoelectrical migration complex (MMC) cycle. The ability to adhere to Caco-2 cells of bacteria belonging to two groups, Gram-positive lactobacilli and lactococci, and Gram-negative Escherichia and Salmonella differed considerably. The pathogenic bacteria adhered better to well-differentiated Caco-2 cells whereas lactobacilli and lactococci displayed better adhesion to non-differentiated Caco-2 cells. In the presence of MMC-related EF an increased adhesion of Lactobacillus and Lactococcus but not of Salmonella enterica s. Enteritidis and E. coli 269 to Caco-2 cells was observed. Two later strains adhered even less in the presence of EF. The same tendency was found in the presence of pancreatic juice in a cell medium. In conclusion, the myoelectric component of the small intestinal motility, the MMC-related EF, and pancreatic juice may increase the ability of lactic acid bacteria to adhere to GI epithelial cells, creating better environmental conditions for colonization of the intestine and competition with Gram-negative pathogens.

13

Platelets augment respiratory burst in neutrophils activated by selected species of gram-positive or gram-negative bacteria

67%

Miedzobrodzki J., Panz T., Plonka P. M., Zajac K., Dracz J., Pytel K., Mateuszuk L., Chlopicki S.

Folia Histochemica et Cytobiologica

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2008

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tom 46

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nr 3

383-388

14

Antimicrobial and antifungal activities of the extracts and essential oils of Bidens tripartita

67%

Tomczykowa M., Tomczyk M., Jakoniuk P., Tryniszewska E.

Folia Histochemica et Cytobiologica

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2008

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tom 46

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nr 3

389-393

15

Actinomycetes in compost

67%

Lacey J.

Annals of Agricultural and Environmental Medicine

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1997

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tom 04

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nr 1

16

The incidence of Listeria monocytogenes and other Listeria spp. in meat, poultry and raw milk

67%

Kwiatek K., Wojton B., Rola J., Rozanska H.

Bulletin of the Veterinary Institute in Puławy

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1992

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tom 35

17

Liposomes as model for the interaction of temporins and phospholipid bilayers

67%

Di Giulio A., Rinaldi A. C., Gualtieri G., Liberi M., Barra D., Simmaco M., Bozzi A.

Cellular and Molecular Biology Letters

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1999

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tom 04

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nr 2

18

The involvement of protein kinase A in the immune response of Galleria mellonella larvae to bacteria

67%

Cytrynska M., Zdybicka-Barabas A., Jakubowicz T.

Acta Biochimica Polonica

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2007

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tom 54

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nr 1

The role of protein kinase A (PKA) in the humoral immune response of the greater wax moth Galleria mellonella larvae to live Gram-positive bacteria Micrococcus lysodeikticus and Gram-negative bacteria Escherichia coli was investigated. The immune challenge of larvae with both kinds of bacteria caused an increase in fat body PKA activity depending on the injected bacteria. Gram-positive M. lysodeikticus was a much better inducer of the enzyme activity than Gram-negative E. coli. The PKA activity was increased about 2.5-fold and 1.5-fold, after M. lysodeikticus and E. coli injection, respectively. The in vivo inhibition of the enzyme activity by a cell permeable selective PKA inhibitor, Rp-8-Br-cAMPS, was correlated with considerable changes of fat body lysozyme content and hemolymph antimicrobial activity in bacteria-challenged insects. The kinetics of changes were different and dependent on the bacteria used for the immune challenge of G. mellonella larvae.

19

Cutaneous nocardiosis in a dog - clinical case preservation

67%

Golynski M., Szczepanik M., Pomorska D., Wilkolek P.

Bulletin of the Veterinary Institute in Puławy

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2006

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tom 50

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nr 1

20

Profile of bacterial genera associated with cotton from low endotoxin and high endotoxin growing regions

67%

Chun D. T. W., Perkins H. H.

Annals of Agricultural and Environmental Medicine

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1997

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tom 04

|

nr 2

Ograniczanie wyników

Active stable maintenance functions in low copy-number plasmids of Gram-positive bacteria. II. Post-segregational killing systems

QS - systems communication of Gram-positive bacterial cells

Ampicillin resistance in Listeria monocytogenes acquired as a result of transposon mutagenesis

Biosynthesis of bacterial peptidoglycan

Effect of external addition of rhamnolipids biosurfactant on the modification of gram positive and gram negative bacteria cell surfaces during biodegradation of hydrocarbon fuel contamination

Active stable maintenance functions in low copy-number plasmids of Gram-positive bacteria. I. Partition systems

Molecular basis of quorum sensing signal-response systems in bacteria

Aerobic microflora of Myotis myotis [Borkhausen, 1797] and Barbastella barbastellus [Schreber, 1774]

Regulatory functions of seryl-phosphorylated HPr in pathogenic bacteria

Current status and future perspectives of DNA vaccine delivery by attenuated intracellular bacteria

Characterization of Bacillus subtilis clones surviving overproduction of Zeta, a pSM19035 plasmid-encoded toxin

Intestinal MMC-related electric fields and pancreatic juice control the adhesion of gram-positive and gram-negative bacteria to the gut epithelium - in vitro study

Platelets augment respiratory burst in neutrophils activated by selected species of gram-positive or gram-negative bacteria

Antimicrobial and antifungal activities of the extracts and essential oils of Bidens tripartita

Actinomycetes in compost

The incidence of Listeria monocytogenes and other Listeria spp. in meat, poultry and raw milk

Liposomes as model for the interaction of temporins and phospholipid bilayers

The involvement of protein kinase A in the immune response of Galleria mellonella larvae to bacteria

Cutaneous nocardiosis in a dog - clinical case preservation

Profile of bacterial genera associated with cotton from low endotoxin and high endotoxin growing regions