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Related Concept Videos

Biosynthesis of Lipids01:29

Biosynthesis of Lipids

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Microbial membranes exhibit remarkable diversity in lipid composition, reflecting evolutionary adaptations to various environmental conditions. The three domains of life—Bacteria, Archaea, and Eukarya—synthesize membrane lipids through distinct biosynthetic pathways, leading to fundamental structural differences that impact membrane stability, function, and adaptability.Fatty Acid-Based Lipids in Bacteria and EukaryaBacteria and eukaryotes share a common fatty acid biosynthesis...
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Biological membranes are more than just a barrier separating cell cytoplasm from the outside environment. They are highly dynamic and help maintain the integrity and physiological stability of the cells as well as membrane-bound organelles. Membranes also play vital roles in cell-to-cell and intracellular communication.
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The ER synthesizes lipids for building cell membranes and performing cellular functions such as energy storage and signaling. The lipid synthesis machinery embedded in the ER membrane primarily collects all reactants from the cytosol. Following synthesis, the secretory pathway and the ER contact sites distribute these lipids to other cellular organelles. Additionally, the energy-rich triacylglycerides are transported from the ER via lipid droplets.
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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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In the secretory pathway, vesicles transport proteins from one cellular compartment to another in forward transport to deliver the protein to its correct location. Occasionally, misfolded proteins and incorrect proteins escape their original compartments, and a retrieval pathway is used to return the escaped proteins to their original compartment.
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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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Ceramide synthases in biomedical research.

Francesca Cingolani1, Anthony H Futerman2, Josefina Casas1

  • 1Research Unit on BioActive Molecules (RUBAM), Department of Biomedicinal Chemistry, Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), Jordi Girona 18, 08034 Barcelona, Spain.

Chemistry and Physics of Lipids
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Summary
This summary is machine-generated.

Ceramide synthases (CerS) regulate sphingolipid metabolism by producing ceramides with varying fatty acid chains. Inhibiting CerS offers potential therapeutic strategies for diseases linked to altered ceramide composition.

Keywords:
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Area of Science:

  • Biochemistry
  • Cell Biology
  • Metabolic Pathways

Background:

  • Sphingolipid (SL) metabolism is crucial, with ceramide (Cer) as a central molecule.
  • Ceramide synthesis involves N-acylation of sphingoid backbones by six ceramide synthase (CerS) isoforms, each with specific acyl-CoA preferences.
  • Different fatty acid compositions of Cer impact cell biology and disease pathogenesis.

Purpose of the Study:

  • To review the functional, structural, and biochemical characteristics of ceramide synthases (CerS).
  • To examine currently available CerS inhibitors for therapeutic potential.

Main Methods:

  • Literature review of studies on ceramide synthases and their inhibitors.
  • Analysis of functional, structural, and biochemical data related to CerS isoforms.
  • Compilation of information on existing CerS inhibitor compounds.

Main Results:

  • CerS isoforms exhibit distinct substrate specificities, influencing ceramide fatty acid chain length.
  • The fatty acid composition of ceramides plays a significant role in various physiological and pathological processes.
  • Modulating CerS activity is a promising therapeutic target.

Conclusions:

  • Understanding CerS function and inhibition is vital for developing novel treatments.
  • CerS inhibitors represent a potential avenue for managing diseases associated with sphingolipid dysregulation.