Phospho-pak1 Staining
Phospho-pak1 Staining - Related Videos
10:52
Radiolabeling and Quantification of Cellular Levels of Phosphoinositides by High Performance Liquid Chromatography-coupled Flow Scintillation
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Cited by 21 •
2016
Phosphoinositides are signaling lipids whose relative abundance rapidly changes in response to various stimuli. This article describes a method to measure the abundance of phosphoinositides by metabolically labeling cells with 3H-myo-inositol, followed by extraction and deacylation. Extracted glycero-inositides are then separated by high-performance liquid chromatography and quantified by flow scintillation.
01:42
Phosphoinositides and PIPs
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2023
Phosphoinositides are a group of phospholipids containing a glycerol backbone with two fatty acid chains and a phosphate attached to a myoinositol sugar ring. The inositol head group extends into the cytoplasm, where it is modified by adding phosphate groups to form phosphatidylinositol phosphates or PIPs. Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
10:58
PIP-on-a-chip: A Label-free Study of Protein-phosphoinositide Interactions
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Cited by 7 •
2017
Here we present a supported lipid bilayer in the context of a microfluidic platform to study protein-phosphoinositide interactions using a label-free method based on pH modulation.
11:33
Microscopy and Staining: Gram, Capsule, and Endospore Staining
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2023
Source: Rhiannon M. LeVeque1, Natalia Martin1, Andrew J. Van Alst1, and Victor J. DiRita1 1 Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, Michigan, United States of America Bacteria are diverse microorganisms found nearly everywhere on Earth. Many properties help distinguish them from each other, including but not limited to Gram-staining type, shape and arrangement, production of capsule, and formation of spores. To observe these properties, one...
06:23
pH Modulation Assay on Supported Lipid Bilayers to Detect Protein-Phosphoinositide Interactions
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2025
In this video, we demonstrate protein-phosphoinositide interactions in a microfluidic pattern using the pH modulation assay, using pH-sensitive fluorescent dye tagged to phosphatidylethanolamine lipid of a supported lipid bilayer, called a microfluidic platform. The modulations in pH after protein binding to phospholipid cause fluorescence quenching.
FAQs
A phospho-PAK1 signal indicates that PAK1 is present in a phosphorylated, activation-associated state. Because PAK1 participates in cellular signaling, changes in signal intensity can reflect altered pathway regulation rather than simply changes in cell number. Comparing staining between experimental conditions therefore helps identify treatments or biological states associated with increased or decreased signaling activity.
Signal location adds information beyond overall abundance. Phospho-pak1 Staining can show where activated PAK1 is distributed within cells or tissue, allowing researchers to relate its position to cellular organization and signaling behavior. Spatial differences may be especially informative in studies of cytoskeletal organization and cell migration, where changes in localization can accompany changes in cellular structure or movement.
The staining pattern provides a visual readout of active PAK1 in the context of processes linked to cytoskeletal organization and migration. Researchers can examine whether signal abundance or distribution changes alongside these cellular behaviors. This makes the method useful for connecting pathway activity with structural or movement-related phenotypes in cells and tissues.
Phospho-pak1 Staining supports comparisons of pathway activity across different experimental conditions. Investigators may compare treated and untreated samples, developmental states, or disease-related models by evaluating differences in phosphorylated PAK1 abundance and distribution. The resulting comparison can reveal whether cellular regulation associated with PAK1 changes between the biological contexts being studied.
Sample preparation includes fixing the cells or tissue, permeabilizing the material, and applying a phospho-specific primary antibody. A labeled secondary antibody is then used to make the bound primary antibody visible through fluorescence or microscopy. Keeping these stages distinct supports detection of the phosphorylation-associated target and produces a staining pattern suitable for comparison.
The phospho-specific primary antibody provides target recognition by binding phosphorylated PAK1. The labeled secondary antibody supplies the detectable signal used for fluorescence or microscopic visualization. Together, these reagents connect molecular specificity with an observable pattern, enabling researchers to assess both the relative abundance and the subcellular distribution of the phosphorylated protein.
This approach is useful when a study asks whether PAK1-associated signaling changes across developmental states or disease-related models. Researchers can compare staining patterns between those contexts and examine differences in signal abundance or location. Such results provide biological context for changes in signal transduction, proliferation, cytoskeletal organization, or migration.