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Showing 1 to 20 of 22 for “"Bacterial chemotaxis"”.
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Microfluidics for bacterial chemotaxis
Bacterial chemotaxis, a remarkable behavioral trait which allows bacteria to sense and respond to chemical gradients in the environment, has implications in a broad range of fields including but not limited to disease pathogenesis, in-situ bioremediation and marine biogeochemistry. And therefore, …
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Signal Processing in Bacterial Chemotaxis
… in the signal transduction pathway of bacterial chemotaxis and 2) the point of convergence of the methylation-independent systems of chemotaxis with the methylation-dependent system. The site of ATP utilization was localized at the CheY protein/switch point. In an Eaeheriehia call …
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A Two-Component Model For Bacterial Chemotaxis
Chemotaxis is the directed cell movement in response to chemical signals. It iscrucial in many multicellular processes, such as wound healing, cancer metastasis,embryonic development and bioremediation. Quantitative descriptions of chemotaxiswill lead to a better understanding of the mechanisms of …
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Exploring the Structural Dynamics of Bacterial Chemotaxis
… and adjust their swimming behavior using their chemotaxis system. The central components of the chemotaxis pathway are transmembrane chemoreceptors, which bind attractant ligands in the periplasmic domain and transmit ligand occupancy information through the cytoplasmic domain to inhibit a …
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Quantitative investigation of bacterial chemotaxis at the single-cell level
… cells in response to chemical stimuli is called chemotaxis. In bacterial chemotaxis, small extracellular molecules bind receptor proteins embedded in the cell membrane, which then transmit the signal inside the cell through a cascade of proteinprotein interactions. This chain of events influences …
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Individual-based modeling of bacterial chemotaxis and spatial ecosystem dynamics
DSpace SAF Submission Ingestion Package generated from Vireo submission #21011 on 2025-03-28 at 14:42:22
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A bacterial algorithm for surface mapping using a Markov modulated Markov chain model of bacterial chemotaxis
Bacterial chemotaxis is the locomotory response of bacteria to chemical stimuli. E. coli movement can be described as a biased random walk, and it is known that the general biological or evolutionary function is to increase exposure to some substances and reduce exposure to others. In this thesis …
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Micro-scale interactions between chemotactic bacteria and algae
… model for the pelagic zone, bacteria, through chemotaxis and motility, can sense and respond to microscale carbon patches exuded from growing algae. This study examines possible conditions necessary under which it is advantageous to swim. As an initial step to test this hypothesis, we developed …
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Signal processing in biological cells : proteins, networks, and models
… mitogen activated protein kinase cascade and the bacterial chemotaxis pathway. The prospects of using cell biology as a metaphor for signal processing are also considered in a preliminary way by presenting a surface mapping algorithm based on bacterial chemotaxis.
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Tactic behaviors in bacterial dynamics
… media. Physical descriptions are developed for bacterial chemotaxis (response to chemical agents) near particles exuding attractants, a small-scale process with global-scale implications for the biogeochemistry of the oceans. Three cases were investigated: a stationary particle, a slowly moving …
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Stochastic Simulation Methods for Solving Systems with Multi-State Species
… for simulation of the rule-based models. The bacterial chemotaxis model has served as a good biological example involving multi-state species. We implemented different simulation methods on this model. Then we constructed a graphical interface and compared the behaviors of the bacterium under …
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Biochemistry and regulation of CheA in Bacillus subtilis chemotaxis
Bacterial chemotaxis is one of the most well understood signal transduction processes in biology. By controlling the direction of flagella rotation, this process allows the organism to sense changes in its surroundings and migrate toward more favorable environments. The process of chemotaxis is …
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An Experimentally-validated Agent-based Model to Study the Emergent Behavior of Bacterial Communities
… for the treatment of diseases. Often driven by chemotaxis (i.e. biased migration in response to gradients of chemical effectors) and quorum sensing (i.e. number density dependent regulation of gene expression), bacterial population dynamics and emergent behavior play a key role in regulating …
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Use of Bioinformatics in the Analysis of Chemotaxis Proteins
<p>Bacterial chemotaxis is one of the best-known signal transduction systems. Levels of attractants and repellents are sensed in the surrounding environment by various chemoreceptors. The signal is passed to the excitation pathway via the transfer of a phosphoryl group from the receptor-associated …
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Long-Term Quantitative Microscopy: From Microbial Population Dynamics to Growth of Plant Roots
… of multiple biological processes, including bacterial chemotaxis, eukaryotic gene expression and y development. Extending measurements to long time scales allows complete observation of processes that are otherwise studied piecemeal, such as development and evolution. This thesis describes …
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Biochemical and molecular characterization of methyl-accepting chemotaxis proteins from Bacillus subtilis
Bacterial chemotaxis may be considered the archetype for the behavioral response by organisms to environmental stimuli. The movement of bacteria toward various chemical substances depends upon the ability of the organism to detect perturbations within the environment. A transmembrane signalling …
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Structural Basis of Bacterial Transmembrane Signaling
… understood. My research focuses on two distinct bacterial signaling systems: the methyl-accepting chemotaxis protein McpZ in Sinorhizobium meliloti and the signaling histidine kinase GacS in Pseudomonas aeruginosa. What made this work particularly challenging is that the ligands that induce …
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Novel Perspectives on the Utilization of Chemotactic Salmonella Typhimurium VNP20009 as an Anticancer Agent
Attenuated bacterial strains have been investigated on the premise of selective tumor colonization and drug delivery potential for decades. Salmonella Typhimurium VNP20009 was derived from the parental strain 14028 through genetic modification and tumor targeting ability, being well studied for …
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Non-canonical sensing mechanisms in bacteria
… or away from toxins in the process known as chemotaxis. Chemotaxis has been extensively investigated in number of bacterial species, such as Escherichia coli, Salmonella typhimurium, Pseudomonas aeruginosa, Helicobacter pylori, and Bacillus subtilis. In the past five decades the study of …
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Cellular strategies for chemotactic navigation in complex chemical environments
… vicinity - this phenomenon is commonly known as chemotaxis. Chemotactic cell migration is central to a variety of processes including embryogenesis, tissue development, wound healing and cancer metastasis [1, 2, 3, 4]. The key to this response is the ability of cells to sense spatial and/or …
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