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Related Concept Videos

Membrane Lipids01:32

Membrane Lipids

Lipids are an essential component of all biological membranes. The average lipid content in mammalian membranes is 50%, though it can be as low as 20% in the inner mitochondrial membrane or as high as 80% in the myelin sheath present around the nerve cells.
Phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, and sphingomyelin are the most common phospholipids present in mammalian membranes. At physiological pH, phosphatidylserine is negatively charged, while the other three...
Membrane Lipids01:32

Membrane Lipids

Lipids are an essential component of all biological membranes. The average lipid content in mammalian membranes is 50%, though it can be as low as 20% in the inner mitochondrial membrane or as high as 80% in the myelin sheath present around the nerve cells.
Phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, and sphingomyelin are the most common phospholipids present in mammalian membranes. At physiological pH, phosphatidylserine is negatively charged, while the other three...
Membrane Fluidity01:23

Membrane Fluidity

Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.Fatty acids tails of phospholipids can be either saturated or...
Membrane Fluidity01:26

Membrane Fluidity

Membrane fluidity is explained by the fluid mosaic model of the cell membrane, which describes the plasma membrane structure as a mosaic of components—including phospholipids, cholesterol, proteins, and carbohydrates—that gives the membrane a fluid character.
Mosaic nature of the membrane
The mosaic characteristic of the membrane helps the plasma membrane remain fluid. The integral proteins and lipids exist as separate but loosely-attached molecules in the membrane. The membrane is a relatively...
Membrane Domains01:18

Membrane Domains

The membrane domains concentrate specific lipids and proteins at one place within the membrane, which helps in cell signaling, adhesion, and other critical cellular processes. These domains can differ in size, composition, function, and lifespan.
Protein Domains
The membrane comprises a group of distinct proteins responsible for carrying out a cell's specific function. For example, the plasma membrane of the human sperm, or a single germ cell, contains a unique set of proteins in the anterior...
Asymmetric Lipid Bilayer01:35

Asymmetric Lipid Bilayer

Biological membranes show uneven distribution of different types of lipids in the inner and outer layers, resulting in transverse asymmetric membranes. The treatment of the erythrocyte membrane with the enzyme phospholipase confirmed the asymmetric nature of the lipid bilayer. The enzyme hydrolyzes lipids into fatty acids and hydrophilic groups. The phospholipase acts only on the outer layer of the membrane, while the inner layer remains intact. The phospholipase treatment resulted in 80%...

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Realistic Membrane Modeling Using Complex Lipid Mixtures in Simulation Studies
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Realistic Membrane Modeling Using Complex Lipid Mixtures in Simulation Studies

Published on: September 1, 2023

Diacylglycerols, multivalent membrane modulators.

Juan C Gómez-Fernández1, Senena Corbalán-García

  • 1Departamento de Bioquímica y Biología Molecular (A), Facultad de Veterinaria, Universidad de Murcia, Apartado de Correos 4021, Murcia, Spain. jcgomez@um.es

Chemistry and Physics of Lipids
|June 15, 2007
PubMed
Summary

Diacylglycerols (DAGs) are simple biomembrane molecules that trigger broad biological responses. They bind to C1 domains and alter membrane properties, influencing protein activity and membrane fusion.

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Last Updated: Jul 14, 2026

Realistic Membrane Modeling Using Complex Lipid Mixtures in Simulation Studies
07:31

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Published on: September 1, 2023

Lipid-Protein Membrane Structure-Function Characterization using Droplet Interface Bilayers
10:27

Lipid-Protein Membrane Structure-Function Characterization using Droplet Interface Bilayers

Published on: June 12, 2026

Construction of Model Lipid Membranes Incorporating G-protein Coupled Receptors (GPCRs)
09:45

Construction of Model Lipid Membranes Incorporating G-protein Coupled Receptors (GPCRs)

Published on: February 5, 2022

Area of Science:

  • Biochemistry
  • Cell Biology
  • Molecular Biology

Background:

  • Diacylglycerols (DAGs) are lipid second messengers found in biomembranes.
  • DAGs regulate diverse biological processes despite their simple structure.
  • The C1 domain is a conserved motif that recognizes DAGs, initially found in protein kinase C.

Purpose of the Study:

  • To elucidate the multifaceted roles of diacylglycerols in cellular signaling and membrane dynamics.
  • To explore the mechanisms by which DAGs interact with proteins and membranes.

Main Methods:

  • Literature review of diacylglycerol signaling pathways.
  • Analysis of protein structures containing C1 domains.
  • Biophysical studies on the effects of DAGs on biomembrane properties.

Main Results:

  • DAGs are recognized by C1 domains present in various proteins beyond protein kinases C.
  • DAGs directly modulate the biophysical properties of biomembranes.
  • DAGs influence the activity of membrane-associated proteins and facilitate membrane fusion.

Conclusions:

  • Diacylglycerols play crucial roles in cellular signaling through C1 domain binding and direct membrane interaction.
  • DAGs are key regulators of membrane-associated protein activity and membrane fusion processes.
  • Further research into DAGs can reveal novel therapeutic targets for diseases involving aberrant cell signaling or membrane dynamics.