Two-component systems required for virulence in Pseudomonas aeruginosa
Vanessa I Francis1, Emma C Stevenson1, Steven L Porter1
1Biosciences, Geoffrey Pope Building, College of Life and Environmental Sciences, University of Exeter, Exeter EX 4QD, UK.
FEMS Microbiology Letters
|May 17, 2017
Summary
Pseudomonas aeruginosa utilizes complex multikinase networks to regulate virulence and adapt to diverse conditions. These systems integrate environmental signals for optimal gene expression and host-pathogen interactions.
Area of Science:
- Microbiology
- Bacterial Pathogenesis
- Molecular Biology
Background:
- Pseudomonas aeruginosa is a highly adaptable opportunistic pathogen.
- Genome regulation is crucial for its survival and virulence.
- Two-component systems (TCSs) are key regulators of bacterial gene expression.
Purpose of the Study:
- To review the role of TCSs in P. aeruginosa virulence.
- To highlight the importance of multikinase networks in signal integration.
- To discuss TCS regulation of specific virulence factors and processes.
Main Methods:
- Literature review of studies on P. aeruginosa TCSs.
- Focus on multikinase networks and their components.
- Analysis of TCS interactions with secondary messengers (cAMP, c-di-GMP).
Main Results:
- Multiple TCSs are implicated in P. aeruginosa virulence.
- Multikinase networks integrate diverse signals for adaptive responses.
- Specific networks regulate acute/chronic virulence, fimbriae, LPS modification, motility, and biofilms.
Conclusions:
- TCSs and multikinase networks are critical for P. aeruginosa virulence.
- Understanding these networks offers targets for therapeutic intervention.
- Interplay with secondary messengers is vital for coordinated bacterial behavior.
Keywords:
Pseudomonas aeruginosaTwo-component signallingmultikinase networksecondary messengersvirulenceMore Related Videos
Related Concept Videos
Gene Regulation in Microbial Communities: Quorum Sensing
779
Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
779
Gram-negative Bacterial Protein Secretion Systems
1.2K
Gram-negative bacteria utilize sophisticated protein secretion systems to transport proteins across their double-membrane envelope into the extracellular environment or host cells. Based on their mechanism of action, these systems are classified into one-step and two-step pathways.One-Step Secretion Systems (Types I, III, IV, and VI)One-step secretion systems bypass the periplasm entirely, forming a continuous channel that spans both the inner and outer membranes:Type I Secretion System (T1SS):...
1.2K
Global Regulatory Systems
789
Global regulatory systems in bacteria enable rapid and coordinated responses to environmental changes by integrating sensory inputs with gene expression, ensuring efficient adaptation to fluctuating conditions. Key global regulatory mechanisms include regulons, two-component systems, sigma factors, and secondary messengers.Regulons and Global RegulatorsA regulon is a collection of genes and operons controlled by a common global regulator. These regulators enable bacteria to prioritize resource...
789
Complement System
11.4K
The complement system is a group of approximately 20 plasma proteins that strengthen the body's defenses against infections through opsonization, inflammation, and cell lysis. Opsonization involves coating pathogens with complement proteins, making them more recognizable and facilitating phagocyte engulfment. Certain complement proteins induce inflammation that attracts immune cells to the site of infection. Cell lysis involves the destruction of pathogens through the formation of a...
11.4K
Fimbriae, Pili, and Axial Filaments
2.4K
Fimbriae and pili are specialized bacterial surface structures that play pivotal roles in adhesion, genetic exchange, and motility. Composed primarily of pilin protein, these hairlike appendages are crucial for bacterial survival and pathogenicity in various environments.Fimbriae: Adhesion and PathogenicityFimbriae are fine, filamentous structures measuring 2–10 nanometers in diameter and are densely distributed on the bacterial cell surface. They facilitate bacterial adhesion to abiotic...
2.4K
Defense Against Bacterial Pathogens
3.2K
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
3.2K


