Phospho Camkii
Phospho Camkii - Related Videos
08:42
Immunostaining Phospho-epitopes in Ciliated Organs of Whole Mount Zebrafish Embryos
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Cited by 3 •
2016
Techniques are described to immunostain phospho-epitopes in whole zebrafish embryos and then conduct two-color fluorescent confocal localization in cellular structures as small as primary cilia. The techniques for fixing and imaging can define the location and kinetics of the appearance or activation of specific proteins.
03:40
Evaluation of Stromal Cytokine-Induced Intracellular Protein Phosphorylation Using Phospho-Flow Cytometry
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2025
This video demonstrates the evaluation of stromal cytokine-induced intracellular phosphorylation of proteins in leukemia cells. These intracellular phosphorylated proteins are quantified using the phospho-flow cytometry technique.
06:26
Use of Anti-phospho-girdin Antibodies to Visualize Intestinal Tuft Cells in Free-Floating Mouse Jejunum Cryosections
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Cited by 3 •
2018
Kuga et al. discovered that phosphorylation-status specific antibodies against the actin binding protein girdin phosphorylated at tyrosine 1798 (pY1798) can be used to label tuft cells (TCs). This protocol allows robust visualization of TCs using immunofluorescent staining of free-floating jejunum cryosections with pY1798 antibodies.
08:38
Phospho Flow Cytometry with Fluorescent Cell Barcoding for Single Cell Signaling Analysis and Biomarker Discovery
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Cited by 29 •
2018
Here, a protocol for medium- to high-throughput analysis of protein phosphorylation events at the cellular level is presented. Phospho flow cytometry is a powerful approach to characterize signaling aberrations, identify and validate biomarkers, and assess pharmacodynamics.
09:34
5-Ethynyl-2'-Deoxyuridine/Phospho-Histone H3 Dual-Labeling Protocol for Cell Cycle Progression Analysis in Drosophila Neural Stem Cells
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Cited by 4 •
2021
Cell cycle analysis with 5-ethynyl-2'-deoxyuridine (EdU) and phospho-histone H3 (pH3) labeling is a multi-step procedure that may require extensive optimization. Here, we present a detailed protocol that describes all steps for this procedure including image analysis and quantification to distinguish cells in different cell cycle phases.
FAQs
Autophosphorylation at threonine 286 or 287 changes the kinase’s regulatory state after calcium/calmodulin activation. This modification enables CaMKII to retain activity when intracellular Ca2+ concentrations fall, extending the effect of a brief calcium signal. Studying these residues therefore helps explain how molecular phosphorylation can convert transient chemical information into longer-lasting changes in enzyme activity.
The key distinction is the timing of kinase activity relative to calcium availability. Calcium-bound calmodulin initiates CaMKII activation, whereas subsequent autophosphorylation allows activity to continue after calcium levels decline. This separation between the initiating signal and the sustained enzyme state provides a biochemical mechanism for storing information about earlier calcium fluctuations.
Phosphorylation changes how CaMKII regulates substrate phosphorylation. Rather than simply reflecting the immediate presence of Ca2+ and calmodulin, the modified enzyme can continue influencing substrate phosphorylation after the calcium signal weakens. In biochemical studies, this makes phospho-CaMKII a useful molecular state for examining how covalent modification affects enzyme regulation and signal persistence.
Phosphorylation assays provide a way to examine whether CaMKII has undergone the regulatory modification associated with persistent activity. By focusing on phosphorylation status, investigators can relate the modified enzyme to changes in substrate phosphorylation and calcium-dependent regulation. These measurements are useful for connecting a chemical modification with the functional behavior of the kinase.
Antibodies can help identify or assess the phosphorylated form of CaMKII, while structural analyses examine how the modification relates to the enzyme’s regulated state. Used alongside phosphorylation assays, these approaches provide complementary information: antibody-based measurements address detection, whereas structural studies contribute insight into molecular organization and regulatory changes.
Phospho-CaMKII links calcium signaling to cellular responses that outlast the original calcium fluctuation, making it relevant to both synaptic plasticity and cardiac physiology. In these research areas, investigators can examine how persistent kinase activity influences downstream substrate phosphorylation. The same regulatory principle therefore offers a biochemical context for studying distinct calcium-dependent processes in different tissues.