Phospholipase C Pathway
Phospholipase C Pathway - 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.
01:27
C4 Pathway and CAM
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2019
Most plants use the C3 pathway for carbon fixation. However, some plants, such as sugar cane, corn, and cacti that grow in hot conditions, use alternative pathways to fix carbon and conserve energy loss due to photorespiration. Photorespiration is the process that occurs when the oxygen concentration is high. Under such conditions, the rubisco enzyme in the Calvin cycle binds O2 instead of CO2, which halts photosynthesis and consumes energy. C4 Pathway The C4 pathway is used by plants such as...
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.
FAQs
They divide the signal into complementary intracellular branches. Diacylglycerol activates protein kinase C, whereas inositol trisphosphate promotes calcium release from intracellular stores. Together, these messengers connect receptor stimulation to changes in protein activity and intracellular calcium, helping explain responses such as smooth-muscle contraction, secretion, metabolism, and gene expression.
Although G protein-coupled receptors and receptor tyrosine kinases are different receptor classes, both can stimulate phospholipase C. Their convergence creates a shared route from extracellular signals to diacylglycerol, inositol trisphosphate, protein kinase C, and calcium-dependent responses. This helps pharmacologists compare how distinct receptor systems produce overlapping cellular effects.
The pathway combines protein kinase C activation with calcium release rather than relying on a single downstream event. This arrangement allows receptor stimulation to influence several cellular processes through coordinated changes in protein activity and intracellular calcium. The resulting combination helps determine whether cells contract, secrete substances, alter metabolism, or change gene expression.
Changes in receptor activity can modify the strength or duration of phospholipase C signaling and its downstream messenger responses. Excessive or insufficient activation may therefore disturb processes regulated by calcium and protein kinase C, including contraction, secretion, metabolism, and gene expression. Studying these alterations helps researchers anticipate adverse responses linked to drug action or abnormal signaling.
A pharmacology study can follow the signaling sequence from receptor stimulation to phospholipase C activation, phosphatidylinositol 4,5-bisphosphate cleavage, messenger production, and downstream cellular effects. Examining these stages helps identify whether a drug acts through a receptor, a signaling component, or a response pathway, supporting the selection of therapeutic targets and interpretation of drug effects.
This pathway is especially relevant when drug effects involve smooth-muscle contraction, secretion, metabolism, or gene expression. Linking a receptor to these outcomes provides a mechanistic framework for understanding therapeutic actions in cells and tissues. It also helps researchers relate altered signaling activity to unwanted responses and evaluate how receptor-directed drugs may influence multiple physiological processes.