What is the molecular structure of sterols?
Sterol
| PubChem CID | 1107 |
|---|---|
| Structure | Find Similar Structures |
| Molecular Formula | C17H28O |
| Synonyms | sterol C00370 SCHEMBL4544647 Hexadecahydro-3H-cyclopenta[a]phenanthrene-3-ol |
| Molecular Weight | 248.4 |
What is a sterol molecule?
Sterols are a subgroup of steroids with a hydroxyl group at the 3-position of the A-ring. They are amphipathic lipids synthesized from acetyl-coenzyme A via the HMG-CoA reductase pathway. The overall molecule is quite flat. The hydroxyl group on the A ring is polar. The rest of the aliphatic chain is non-polar.
What molecule is derived from sterols?
Multicellular organisms rely on sterol-derived hormones like the steroids of vertebrates, brassinosteroids of plants and ecdysteroids, or other molting hormones of invertebrates. Other sterol-derived signaling molecules include Vitamin D, bile acids, and oxysterols (Kurzchalia and Ward 2003).
What elements are in sterols?
Fats, waxes, and sterols contain only carbon, hydrogen, and oxygen. Most phospholipids contain a diglyceride, a phosphate group, and a simple organic molecule such as choline. Thus, they contain phosphorus and nitrogen.
Is sterol a lipid?
Sterols are isoprenoid-derived lipids with essential roles in cell structure, function, and physiology.
Which compound is a sterol quizlet?
Sterols include cholesterol, bile acids, sex hormones, adrenal hormones and vitamin D. Cholesterol in the body starts as the starting material for synthesis of these different types of sterols. Cholesterol is also a structural component of cell membranes.
How sterol is formed?
In eukaryotes, the synthesis of sterol consists of three major steps: synthesis of isopentenyl pyrophosphate from acetyl CoA; condensation of isopentenyl pyrophosphate and dimethylallyl pyrophosphate to form squalene; and cyclization of squalene into lanosterol, which is then converted into final products such as …
What is sterol function?
Sterols play a vital role in cell signalling by helping regulate the process of development. In addition, they pass on messages received from outside the cell to effect changes inside the cell. In this capacity, they are known as second messengers.
How are sterols formed?
In general, sterols are synthesized via the mevalonate pathway of isoprenoid metabolism [3]. Mammalian sterols Cholesterol is found in many biological membranes and is the main sterol of animals. It is often equimolar with phospholipids in many membranes.
Is sterol a protein?
The human sterol carrier protein 2 (SCP2) is a basic protein that is believed to participate in the intracellular transport of cholesterol and various other lipids. …
What is cholesterol in chemistry?
cholesterol, a waxy substance that is present in blood plasma and in all animal tissues. Chemically, cholesterol is an organic compound belonging to the steroid family; its molecular formula is C27H46O. In its pure state it is a white, crystalline substance that is odourless and tasteless.
Is sterol a phospholipid?
Mammalian sterols Cholesterol is found in many biological membranes and is the main sterol of animals. It is often equimolar with phospholipids in many membranes. It has a tetracyclic structure with the OH group in the equatorial position on its first A ring (Fig.
Where does the formula for sterol come from?
From Wikipedia, the free encyclopedia Sterol is a chemical compound with formula C 17H 28O, whose molecule is derived from that of gonane by replacement of a hydrogen atom in position 3 by a hydroxyl group.
What are the double bonds of stigmastane sterol?
Stigmasterol is a 3beta-sterol that consists of 3beta-hydroxystigmastane having double bonds at the 5,6- and 22,23-positions. It has a role as a vitamin and a plant metabolite. It is a 3beta-sterol, a stigmastane sterol, a 3beta-hydroxy-Delta (5)-steroid and a member of phytosterols.
Where is the hydroxyl group on the sterol molecule?
Sterols are a subgroup of steroids with a hydroxyl group at the 3-position of the A-ring. They are amphipathic lipids synthesized from acetyl-coenzyme A via the HMG-CoA reductase pathway. The overall molecule is quite flat. The hydroxyl group on the A ring is polar.
How are steroids related to other organic molecules?
The name is also used generically for compounds that are derived from this one by substituting other chemical groups for some of the hydrogen atoms, or modifying the bonds in the ring. These sterols or steroid alcohols are a subgroup of the steroids and an important class of organic molecules.