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Overview of Lipid Metabolism01:24

Overview of Lipid Metabolism

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Lipid metabolism is a crucial process in the human body that involves the synthesis and degradation of lipids. This process is essential for energy production, cell membrane formation, and hormone production, among other functions.
Lipolysis: The Breakdown of Lipids:
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Fats and lipids are crucial components in the human body. Some lipid-derived compounds, such as fat-soluble vitamins, eicosanoids, lipoproteins, and glycolipids, also play unique roles to support various  biological processes .
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Fat-soluble vitamins, including vitamins A, D, E, and K, are required in minimal quantities, but their deficiencies can lead to severely abnormal physiological conditions. For example, vitamin A deficiency can cause night blindness, dry skin,...
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Overview of Fatty Acid Metabolism01:28

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Lipids also are sources of energy that power cellular processes. Like carbohydrates, lipids are composed of carbon, hydrogen, and oxygen, but these atoms are arranged differently. Most lipids are nonpolar and hydrophobic. Major types include fats and oils, waxes, phospholipids, and steroids.
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Lipid Catabolism01:25

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Triglycerides serve as crucial long-term energy storage molecules in microorganisms, providing a dense source of metabolic energy. Their breakdown is mediated by lipases, which hydrolyze triglycerides into glycerol and free fatty acids. Each of these components follows distinct metabolic pathways, ultimately contributing to ATP synthesis and cellular energy homeostasis.Glycerol MetabolismGlycerol, released from triglyceride hydrolysis, is phosphorylated by glycerol kinase to form...
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What are Lipids?01:38

What are Lipids?

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What are Lipids?01:31

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Lipids function as structural components of cellular membranes, in addition to acting as energy reservoirs and signaling molecules. They are thus crucial to all living organisms.  The three biologically important classes of lipids are triglycerides, phospholipids, and steroids.
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Related Experiment Video

Updated: Nov 15, 2025

Cell-free Biochemical Fluorometric Enzymatic Assay for High-throughput Measurement of Lipid Peroxidation in High Density Lipoprotein
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Protein Lipoxidation: Basic Concepts and Emerging Roles.

Álvaro Viedma-Poyatos1, Patricia González-Jiménez1, Ophélie Langlois2

  • 1Department of Structural and Chemical Biology, Centro de Investigaciones Biológicas Margarita Salas, Consejo Superior de Investigaciones Científicas (C.S.I.C.), 28040 Madrid, Spain.

Antioxidants (Basel, Switzerland)
|March 6, 2021
PubMed
Summary

Protein lipoxidation, a modification increasing under oxidative stress, is implicated in diseases. This review explores its potential role in cell signaling, highlighting selectivity and reversibility.

Keywords:
cell signallingelectrophilic lipidslipoxidationoxidative stresspost-translational modificationsregulationselectivity

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Molecular Biology

Background:

  • Protein lipoxidation is a non-enzymatic post-translational modification.
  • It involves the covalent addition of reactive lipid species to proteins.
  • Lipoxidation increases under oxidative stress and is linked to diseases like atherosclerosis, neurodegeneration, and cancer.

Purpose of the Study:

  • To review basic aspects of protein lipoxidation.
  • To discuss its potential role in cellular regulatory mechanisms and cell signaling.
  • To explore features supporting its role in signaling, including selectivity, reversibility, and regulation.

Main Methods:

  • Literature review of protein lipoxidation.
  • Analysis of features supporting a role in cell signaling.
  • Discussion of structural diversity of lipoxidized proteins and interplay with other modifications.

Main Results:

  • Protein lipoxidation targets include metabolic enzymes, signaling molecules, cytoskeletal proteins, and transcription factors.
  • Features like selectivity, reversibility, and regulatory control suggest a role in cell signaling.
  • The structural diversity of lipoxidized species and their interaction with other post-translational modifications are highlighted.

Conclusions:

  • Protein lipoxidation is a significant post-translational modification with implications beyond disease.
  • Its characteristics support a role in cellular regulatory mechanisms and cell signaling.
  • Further research is needed to fully understand the complex interplay of lipoxidation with other cellular processes.