Phospholipase C Activation
Phospholipase C Activation - Related Videos
03:16
Phospholipase Activity Assay: A Gel Diffusion Assay to Determine Phospholipase Activity in Crude Venom Extract from Anthopleura dowii
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2025
In this video, we demonstrate an assay to establish the presence of phospholipase in the crude venom extract from Anthopleura dowii—a marine sea anemone. The assay utilizes an agarose gel diffusion technique, in which the enzyme phospholipase diffuses and breaks down phospholipids incorporated in the solid media in a radial manner.
08:59
Defining Substrate Specificities for Lipase and Phospholipase Candidates
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Cited by 10 •
2016
Many predicted (phospho)lipases are poorly characterized with regard to their substrate specificities and physiological functions. Here we provide a protocol to optimize enzyme activities, search for natural substrates, and propose physiological functions for these enzymes.
08:30
Detection of Phospholipase C Activity in the Brain Homogenate from the Honeybee
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Cited by 2 •
2018
To test the inhibitory effects of pharmacologic agents on phospholipase C (PLC) in different regions of the honeybee brain, we present a biochemical assay to measure PLC activity in those regions. This assay could be useful for comparing PLC activity among tissues, as well as among bees exhibiting different behaviors.
12:12
Identification of Hemolytic and Phospholipase Activity in Crude Extracts from Sea Anemones by Straightforward Bioassays
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2022
Here, we describe a protocol to obtain crude venom extract from sea anemone and detect its hemolytic and phospholipase activity.
03:54
Monitoring B Cell Activation with Antigenic Liposomes using a Calcium-Flux Assay
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2025
This video showcases the assessment of B cell activation through the utilization of antigenic liposomes. B cells treated with calcium-sensitive Indo-1 dye are distinguished using flow cytometry, and their violet-to-blue fluorescence ratio is analyzed. As the cells encounter antigenic liposomes, it triggers B cell activation through calcium influx, progressively enhancing the violet-to-blue fluorescence signal ratio over time.
FAQs
Cleavage of PIP2 generates IP3 and DAG, which support complementary signaling roles. IP3 promotes calcium release from the endoplasmic reticulum, whereas DAG works together with calcium to activate protein kinase C. This division allows one membrane lipid to produce coordinated effects on target proteins and cellular behavior rather than a single downstream response.
IP3 acts as the link between phospholipase C activity and calcium mobilization by promoting calcium release from the endoplasmic reticulum. The resulting calcium signal combines with DAG to activate protein kinase C. This cooperation connects lipid hydrolysis to changes in target proteins, enabling signaling outcomes that depend on both messenger pathways.
In the common pathway, ligand binding first activates a G protein-coupled receptor, which then activates the Gq protein. Gq provides the relay that stimulates phospholipase C, allowing the receptor-generated cue to reach PIP2 in the membrane. This relay links an extracellular signal to intracellular biochemical responses through the enzyme and its products.
The pathway extends beyond messenger production because calcium and DAG activate protein kinase C, which alters target proteins. Those protein changes can influence cellular behavior, including secretion, contraction, metabolism, and gene regulation. Consequently, phospholipase C activation functions as a route from an initiating cue to broader physiological or regulatory changes inside the cell.
A useful sequence begins with the initiating ligand or cue, followed by G protein-coupled receptor and Gq activation. The analysis then tracks phospholipase C stimulation, PIP2 hydrolysis, and formation of IP3 and DAG. Finally, it connects calcium release and protein kinase C activation to altered target proteins and the resulting cellular behavior.
This pathway provides context for studying secretion, contraction, metabolism, gene regulation, and other changes in cellular behavior. These outcomes reflect downstream effects of calcium release, DAG, and protein kinase C activity. In biology, tracing the pathway from its initiating cue to one of these responses helps relate molecular signaling events to cell function.
Disease research can use this pathway to examine how signal disruption affects communication between cues and cellular responses. Changes anywhere along the receptor, Gq, phospholipase C, IP3, DAG, calcium, or protein kinase C sequence could alter target-protein activity and cell behavior. The pathway therefore offers a framework for connecting signaling abnormalities with impaired cellular functions.