Polar lipids
In biochemistry , polar lipids are lipids that have a greater polarity than neutral lipids and therefore dissolve well in polar organic solvents .
properties
Polar lipids include most of the membrane lipids found in the cell membrane and other biomembrane . The higher polarity compared to neutral lipids and the resulting lower lipophilicity are caused by attached water-soluble groups such as glycosyl groups ( glycolipids ) and phosphate groups ( phospholipids ) or sulfate groups ( cholesterol sulfate and sulfatides ). Some polar lipids are made up of cholesterol or sphingosine ( sphingolipids ). Since the polar groups are mostly terminal, they tend to form a lipid bilayer due to the hydrophobic effect in aqueous solutions and are therefore suitable for the construction of biomembranes.
literature
- NP Ulrih, D. Gmajner, P. Raspor: Structural and physicochemical properties of polar lipids from thermophilic archaea. In: Applied Microbiology and Biotechnology . Volume 84, Number 2, August 2009, pp. 249-260, doi : 10.1007 / s00253-009-2102-9 , PMID 19590870 .
- PJ Quinn: Phases of membrane polar lipids in aqueous systems. In: Natural product reports. Volume 1, Number 6, December 1984, pp. 513-531, PMID 6399355 .
Individual evidence
- ↑ Moghis U. Ahmad: Polar Lipids. Elsevier, 2015, ISBN 978-1-630-67045-0 . Page VII.