Methyl-accepting Chemotaxis Proteins
Methyl-accepting Chemotaxis Proteins - Related Videos
08:24
Imaging G Protein-coupled Receptor-mediated Chemotaxis and its Signaling Events in Neutrophil-like HL60 Cells
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Cited by 7 •
2016
Visual chemotaxis assays are essential for a better understanding of how eukaryotic cells control chemoattractant-mediated directional cell migration. Here, we describe detailed methods for: 1) real-time, high-resolution monitoring of multiple chemotaxis assays, and 2) simultaneously visualizing the chemoattractant gradient and the spatiotemporal dynamics of signaling events in neutrophil-like HL60 cells.
09:40
Imaging G-protein Coupled Receptor (GPCR)-mediated Signaling Events that Control Chemotaxis of Dictyostelium Discoideum
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Cited by 2 •
2011
Here, we describe detailed live cell imaging methods for investigating chemotaxis. We present fluorescence microscopic methods to monitor spatiotemporal dynamics of signaling events in migrating cells. Measurement of signaling events permits us to further understand how a GPCR-signaling network achieves gradient sensing of chemoattractants and controls directional migration of eukaryotic cells.
08:57
C. elegans Chemotaxis Assay
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2023
Chemotaxis is a process in which cells or organisms move in response to a chemical stimulus. In nature, chemotaxis is important for organisms to sense and move toward food sources and move away from stimuli that may be toxic or harmful. Chemotaxis is also important at the cellular level. For example, chemotaxis is required for the movement of sperm toward an egg prior to fertilization. In the lab, chemotaxis is frequently examined in the nematode, C. elegans, which is known to migrate...
06:28
C. elegans Chemotaxis Assay
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Cited by 163 •
2013
A method of quantitatively evaluating the chemotactic response of Caenorhabditis elegans is described. A chemotactic index (CI) was employed as a way to precisely evaluate the response of worms to certain targets, and serve as a platform of comparison between strains and compounds of interest.
10:01
In vitro Methylation Assay to Study Protein Arginine Methylation
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Cited by 8 •
2014
Protein arginine methylation, catalyzed by a class of enzymes viz., protein arginine methyl transferases (PRMTs), is the process of enzymatic addition of methyl group(s) to arginines within proteins. The in vitro methylation assay is the most dependable tool for assessing the methylation status of known or novel PRMT substrates.
FAQs
Signal transmission depends on a receptor-protein assembly rather than on the sensing domain alone. Changes in ligand interaction alter the cytoplasmic signaling region, which communicates with CheA through CheW. CheA then changes phosphorylation of CheY, linking extracellular chemical information to the flagellar motor and producing a behavioral response. This organization couples chemical detection to movement.
CheR and CheB reset receptor sensitivity through opposing methylation reactions. CheR adds methyl groups to MCPs, whereas CheB removes them, allowing the signaling system to adapt after stimulation. This adjustment prevents the receptor from responding only to a persistent condition and helps the bacterium remain responsive to subsequent chemical changes over time.
CheY phosphorylation serves as the intracellular link between receptor activity and flagellar rotation. MCP signaling changes CheA kinase activity, which changes the phosphorylation state of CheY. The resulting change in CheY signaling influences the flagellar motor and therefore bacterial movement. This step converts information about external chemicals into an observable motility response.
Investigating MCPs can clarify how bacteria integrate chemical sensing, intracellular signal transduction, adaptation, and motility. Because these receptors connect environmental information with flagellar behavior, they provide a framework for studying how microbial cells respond to favorable or harmful conditions. Analyses can therefore link molecular signaling events with broader patterns of bacterial behavior.
MCPs are relevant to pathogenesis research because they provide a molecular entry point for examining how bacteria sense chemical conditions and regulate movement. Understanding receptor signaling and adaptation can help researchers relate environmental detection to microbial behavior in settings associated with disease. The topic therefore connects membrane signaling, motility, and the study of pathogenic organisms.
MCP research can inform studies of environmental sensing by showing how bacteria detect chemical conditions and adjust their movement through signaling and adaptation. The same principles provide context for engineered bacterial navigation, where receptor-linked control of motility is relevant to directing cellular responses. These applications build on the connection between chemical information and movement.