Phospholipase C
Phospholipase C - 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.
01:21
Cell-surface Signaling
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2019
Hormones—or any molecule that binds to a receptor, known as a ligand—that are lipid-insoluble (water-soluble) are not able to diffuse across the cell membrane. In order to be able to affect a cell without entering it, these hormones bind to receptors on the cell membrane. When a first messenger, a hormone, binds to a receptor, a signal cascade is set off, causing second messengers, proteins inside the cell, to become activated, resulting in downstream effects. Variety of Receptor Families
FAQs
The two cleavage products direct signals through different cellular locations. IP3 carries information from the membrane to the endoplasmic reticulum, where it promotes calcium release, whereas DAG remains within the membrane and helps activate protein kinase C. Their parallel actions allow one receptor stimulus to coordinate calcium-dependent responses with protein-kinase signaling rather than relying on a single downstream pathway.
Phospholipase C serves as a signaling connection for two major receptor classes described in the pathway. Activated G protein-coupled receptors or receptor tyrosine kinases can stimulate the enzyme, which then generates IP3 and DAG from phosphatidylinositol 4,5-bisphosphate. This arrangement links different modes of extracellular communication to a shared intracellular signaling system and common downstream effects.
DAG remains in the membrane after phosphatidylinositol 4,5-bisphosphate is cleaved, while IP3 promotes calcium release from the endoplasmic reticulum. This location-specific behavior preserves distinct signaling routes within the same response. Membrane-associated DAG can therefore contribute to protein kinase C activation at the signaling site, while IP3 connects receptor activity to intracellular calcium regulation.
A pathway analysis can follow the sequence from receptor activation to phosphatidylinositol 4,5-bisphosphate cleavage, then track the formation of IP3 and DAG. The downstream response can be considered through calcium release from the endoplasmic reticulum and protein kinase C activation. Examining these linked steps helps connect an initiating receptor signal with effects on cell behavior.
PLC-related signaling is relevant when researchers investigate secretion, contraction, metabolism, proliferation, or gene expression. These outcomes represent different ways that the IP3-calcium and DAG-protein kinase C branches can influence cell function. Studying the pathway therefore helps relate membrane communication to coordinated physiological responses rather than treating receptor activity as an isolated molecular event.
Because PLC signaling connects environmental or intercellular cues with calcium release and protein kinase C activity, it can affect many forms of cell behavior. This broad reach makes the pathway useful for studying normal physiology, developmental processes, immune responses, and disease-related changes. Its importance lies in linking receptor communication to alterations in cellular function and gene expression.