What is special about sphingolipids?
For almost a century, sphingolipids were regarded only as structural components of lipid bilayers, such as biological membranes. However, investigations in the mid-1980s revealed that specific sphingolipid species are involved in the regulation of biological processes.
What is the meaning of sphingolipids?
Sphingolipids are a class of lipids containing a backbone of sphingoid bases, a set of aliphatic amino alcohols that includes sphingosine. They were discovered in brain extracts in the 1870s and were named after the mythological sphinx because of their enigmatic nature.
What are the structural properties of sphingolipids?
Structure. Sphingolipids are amphipathic molecules; they have hydrophobic and hydrophilic properties. In the hydrophobic region there is a sphingoid long chain base (aliphatic chains with attached hydroxyl groups) with a fatty acid chain attached by amide bond at carbon 2.
What are sphingolipids in biochemistry?
sphingolipid, any member of a class of lipids (fat-soluble constituents of living cells) containing the organic aliphatic amino alcohol sphingosine or a substance structurally similar to it.
What are the types of sphingolipids?
Definition: Sphingolipids are a class of lipids derived from the aliphatic amino alcohol sphingosine. There are three main types of sphingolipids: ceramides, phosphosphingolipids (sphingomyelins), and glycosphingolipids, which differ in the substituents on their head group.
Where are sphingolipid found?
cellular membranes
Sphingolipids are located in cellular membranes, lipoproteins (especially LDL) and other lipid-rich structures, such as skin.
Are sphingolipids amphiphilic?
As is the case for all membrane lipids, sphingolipids are amphipathic molecules that have both hydrophobic and hydrophilic properties, albeit to varying extents.
What are sphingolipids made of?
Sphingolipids are composed of a variety of membrane-associated molecules that contain a long-chain sphingoid base. The base may be acylated, glycosylated, and phosphorylated to produce a variety of structures with important biological functions.
What does it mean to be amphiphilic?
Definition of amphiphilic : of, relating to, or being a compound (such as a surfactant) consisting of molecules having a polar water-soluble group attached to a water-insoluble hydrocarbon chain also : being a molecule of such a compound.
Why are sphingolipids degraded?
The degradation of SphingoLipids (SLs) occurs through a series of specific hydrolases in the lysosome, after the compounds have been transported via the endosomal pathway. Disorders resulting from an enzyme defect are highlighted in pink.
Is sphingolipid a phospholipid?
Sphingolipids are a type of phospholipids that contain a long chain amino alcohol called sphingosine attached to a fatty acid chain. Hence, the core of the sphingolipids is the sphingosine. Moreover, these are the lipids commonly found in nervous tissue that involve with the signal transmission and cell recognition.
What is the main difference between phospholipid and sphingolipid?
The main difference between phospholipids and sphingolipids is that phospholipids consist of a glycerol backbone whereas sphingolipids consist of a sphingosine backbone.