Bacterial Two Component Systems
Bacterial Two Component Systems - Related Videos
01:27
Two Components: Liquid–Liquid Systems
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2026
A pressure-composition phase diagram explicitly describes the behavior of an ideal solution of two volatile liquids under varying pressures and compositions. A pressure-composition diagram has two main curves. The bubble point curve represents the plot of pressure versus liquid mole fraction. It indicates the pressure at which the first bubble of vapor forms from the liquid phase as the system pressure decreases.The dew point curve is the pressure versus vapor mole fraction. It indicates the...
12:24
DNA-affinity-purified Chip (DAP-chip) Method to Determine Gene Targets for Bacterial Two component Regulatory Systems
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Cited by 10 •
2014
This video article describes an in vitro microarray based method to determine the gene targets and binding sites for two component system response regulators.
02:34
Intraperitoneal Injection of Bacterial Lipopolysaccharide in Mice to Study Systemic Immune Responses
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2026
Source: Radulovic, K., et al. Injections of Lipopolysaccharide into Mice to Mimic Entrance of Microbial-derived Products After Intestinal Barrier Breach. J. Vis. Exp. (2018)This video demonstrates a step-by-step procedure for injecting lipopolysaccharide (LPS) into mice intraperitoneally to induce systemic inflammation.
02:36
A Septic Pinprick Technique to Introduce Systemic Bacterial Infection in Flies
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2025
This video demonstrates a technique to infect Drosophila by introducing a pathogenic bacteria directly into their body cavity. This method bypasses epithelial barriers and other passive defense mechanisms, allowing for the induction of systemic infection. Upon infection, the resulting immune response is assessed by monitoring fly mortality and performing downstream assays.
03:52
Quantification of Bacterial Load in Mouse Spleen and Liver After Systemic Infection
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2026
Source: Ahn, J. J., et al. Experimental Infection with Listeria monocytogenes as a Model for Studying Host Interferon-γ Responses. J. Vis. Exp. (2016)The video demonstrates bacterial load measurement in spleen and liver tissues isolated from mice infected with an intracellular bacterial pathogen. Bacteria, accumulated within tissue-resident phagocytes during systemic infection, are released using detergent-based lysis and mechanical disruption. Serial dilutions of the homogenates are plated on...
FAQs
Signal transmission follows an ordered phosphorylation relay. After detecting an environmental stimulus, the sensor histidine kinase autophosphorylates a conserved histidine residue. It then transfers the phosphate group to a conserved aspartate on its partner response regulator. This molecular handoff connects stimulus detection with downstream changes in transcription or cellular behavior.
The conserved histidine and aspartate provide the key phosphorylation sites in the relay. The sensor histidine kinase receives the phosphate during autophosphorylation, while the response regulator accepts it during phosphotransfer. Their sequential participation allows information to move from the environmental sensor to the regulatory component that directs a bacterial response.
Phosphorylation activates the response regulator to influence gene expression or another cellular behavior. The resulting output can alter how bacteria manage metabolism, movement, stress responses, or virulence. Thus, the response regulator serves as the point where a detected environmental change becomes a coordinated physiological adjustment rather than an isolated molecular event.
They help bacteria respond to changes in their surroundings by linking external stimuli with adaptive cellular programs. The specific consequence depends on the process under regulation, which may include metabolism, motility, stress management, or virulence. This flexibility allows the same general signaling architecture to support survival across changing biological conditions.
Researchers may examine metabolism, motility, stress responses, and virulence as distinct physiological outputs. These categories show how signaling can affect both routine cellular functions and interactions with challenging environments or hosts. Studying the regulated outcome helps connect phosphorylation-based signal transmission with the bacterial trait or behavior that changes afterward.
Their role in connecting environmental sensing to gene expression and cellular behavior makes them relevant to antimicrobial research. Investigators can study how signaling supports bacterial adaptation and survival, while microbiology provides the broader framework for analyzing these networks. The same systems also help research on host-pathogen interactions by linking bacterial responses to conditions encountered during infection.