Difference Between Phospholipids and Sphingolipids

Thekey differencebetween phospholipids and sphingolipids is that the磷脂是最丰富的脂质在生物膜中包括质膜while the sphingolipids are the most abundant lipids in the nervous tissue.

Lipid is a macromolecule composed ofglycerol and fatty acids. Lipids are mainly two types such as simple lipids and compound lipids. Structurally, simple lipids are esters of fatty acids with various alcohols. They include oils and fats. Compound lipids are the lipids which yield fatty acids, alcohols and other additional groups such as phosphoric acid, nitrogenous base carbohydrates, sulphur, amino acids, proteins, etc. upon hydrolysis. Likewise, Phospholipids and sphingolipids are two types of compound lipids, which are structural components. In addition, there are lipids called derived lipids. These are the hydrolytic products of simple and compound lipids that possess the physical characteristics if lipids.

内容

1.Overview and Key Difference
2.What are Phospholipids
3.What are Sphingolipids
4.Similarities Between Phospholipids and Sphingolipids
5.并排比较 - 表格形式的磷脂与鞘脂
6。概括

What are Phospholipids?

Phospholipids are the most abundant lipids that serve as structural components of bio-membranes including cell membrane, lysosomal membrane, mitochondrial membrane, endoplasmic reticulum membrane, Golgi apparatus membrane, etc. Moreover, they are amphipathic molecules composed of a polar hydrophilic head and two non-polar, hydrophobic tails.

When constructing a phospholipid molecule, one fatty acid tail removes and replaces it with a phosphate group. Together with the glycerol molecule, phosphate group makes the polar head of the phospholipid molecule. In addition, there is an additional molecule attached to a phosphate group. It can be a choline molecule, serine group, or an ethanolamine molecule. Consequently, based on these, phospholipids are three types namely phosphoglycerides, phosphor inositides and phospho sphingosides.

What are Sphingolipids?

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.

There are three subclasses of sphingolipids such as sphingomyelin, glycosphingolipids and gangliosides. Sphingomyelins are present abundantly in the cell membranes of animal cells especially in the myelin sheath of neurons. On the other hand, glycosphingolipids are a type of conjugated lipids present abundantly in the brain and spinal cord. The last type, gangliosides are the most complex sphingolipids that are present abundantly in ganglion cells of nervous tissue.

What are the Similarities Between Phospholipids and Sphingolipids?

• 磷脂和鞘脂是脂质，涉及我们体内许多功能。
• They both are compound lipids that contain additional groups other than the fatty acids and glycerol molecules.
• Also, both serve as structural components of membranes and tissues.
• Furthermore, both contain phosphate groups in their molecules.
• 此外，两者都不能与水混合。

What is the Difference Between Phospholipids and Sphingolipids?

磷脂和鞘脂是彼此略有不同的复合脂质。磷脂和鞘脂之间的主要区别在于，磷脂是生物膜中最丰富的结构成分，而Sphiongolipids通常在神经组织中发现。此外，鞘脂含有鞘氨醇作为核心分子，而鞘脂则在磷脂中不存在。

贝尔的ow infographic presents further facts on the difference between phospholipids and sphingolipids.

概括– Phospholipids vs Sphingolipids

磷脂是质膜丰富的复合脂质，它们形成脂质双层。另一方面，鞘脂是一种在神经组织中丰富的磷脂。因此，它们参与信号传递和细胞识别。此外，鞘脂具有鞘氨醇作为其核心分子。因此，这总结了磷脂和鞘脂之间的差异。

Reference:

1. “Phospholipids and Related Complex Lipids.” SMC Homepage.Available here
2.“Phospholipids.” Phospholipids – an Overview | ScienceDirect Topics.Available here

Image Courtesy:

1.”Phospholipid TvanBrussel.edit”By Superscience71421 – Own work,(CC BY-SA 4.0)viaCommons Wikimedia
2. LHCHEM的“鞘脂的通用结构” - 自己的作品，(CC BY-SA 3.0)viaCommons Wikimedia