“Steroids and Steroid derivatives class [ST class]”  [ST] 

Steroids and Steroid derivatives

  In organic chemistry, Steroids and Steroid derivatives are a class of organic compounds in the lipids superclass, based on the cyclopenta[a]phenanthrene carbon skeleton, partially or completely hydrogenated; there are usually methyl groups at C-10 and C-13, and often with an alkyl group at C-17. By extension, one or more bond scissions, ring expansions and/or ring contractions of the skeleton may have occurred..

Sterol Lipids [ST]

  In lipid science, Sterol Lipids [ST] are a class of lipids, and an important component of membrane lipids in our body, along with the glycerophospholipids and sphingomyelins.

Sterol Lipid Class [ST class]

  The lipid subclasses in the lipid chemical structure category of the sterol lipid class [ST class] includes:

Sterols [ST01] Steroids [ST02] Secosteroids [ST03] (seco-steroids) Bile acids and derivatives [ST04] Steroid Conjugates [ST05] Other Sterol lipids [ST00] steroidal alkaloids steroidal glycosides steroid acid steroid aldehyde steroid antibiotic steroid ester steroid glucosiduronic acid

steroid hormone steroid lactone steroid saponin steroid sulfide androstanoid aza-steroid C18-steroid C19-steroid C21-steroid C27-steroid cevane cevine chlorinated steroid cholane derivative cholanoid cholestanoid conanine corticosteroid cycloartane derivative

dammarane Demissidine Dinosterone ecdysteroid Epimestrol epoxy steroid ergostanoid estrane derivative ethinylestradiol sulfonate fluorinated steroid formocortal Funtumine

Furazabol gestodene Gitingensine Gorgosterol Helogenin hydroxy steroids (hydroxysteroids) Hydroxystenozole Isofucostanol Kibalaurifoline lanostane derivative Lynestrenol Makisterone A N-acetylgitingensine N-methylgitingensine norelgestromin norgestrienone Normethandrolone oxa-steroid oxabolone oxo steroid

Paravallarine pentagestrone Poriferasterol pregnane derivative promestriene Pterosterone quinestradol Saikosaponin A Sarcoaldesterol A Schottenol Solamargine Solasonine spirosolane sterone-ring stigmastane derivative sulfooxy steroid Tomatidinol Ursodeoxycholic acid 3-sulfate veratridine

Examples of more specific substances include:

Ajugasterone C Allylestrenol alpha-Spinasterol

androisoxazole androst-16-ene

Batrachotoxin beta-sitostenone Chenodeoxycholic acid 3-sulfate (3-Sulfochenodeoxycholate)

Clerosterol cortivazol dammara-20,24-diene

*

_[36510]

“Sterols [ST01]”  

Sterols (3-hydroxysteroids)

  In lipid science, a Sterols, aka 3-hydroxysteroids, a class of organic molecules, a form of Steroid known as a steroid alcohol is a steroid with a hydroxyl group at C-3 and most of the skeleton of cholestane.

In nature, Sterols occur naturally in plants, animals, and fungi.

Sterols Role & Familiar Sterols

  In our body, two familiar types of sterols are Vitamin D and cholesterol.

In our body, cholesterol and related compounds play essential roles.

For example, cholesterol forms part of our cellular membrane, where it affects the cell membrane's fluidity and serves as secondary messenger in developmental signaling.

Corticosteroids, such as Cortisol in our body act as signaling compounds in cellular communications (cell communications) and general metabolism.

  

Sterol Class [ST01 Class]

In lipid science, subclasses of the Sterol class [ST class] of lipids include: Cholesterols and Cholesterol Derivatives [ST0101] Steryl esters [ST0102] Ergosterols and C24-methyl derivatives [ST0103] Stigmasterols and C24-ethyl derivatives [ST0104] C24-propyl sterols and derivatives [ST0105] Gorgosterols and derivatives [ST0106] Furostanols and derivatives [ST0107] Spirostanols and derivatives [ST0108] Furospirostanols and derivatives [ST0109] Cycloartanols and derivatives [ST0110] Calysterols and cyclopropyl sidechain derivatives [ST0111] Cardanolides and Cardanolide Derivatives [ST0112] bufanolides and derivatives [ST0113] Brassinolides and derivatives [ST0114] Solanidines and alkaloid derivatives [ST0115] Withanolides and derivatives [ST0116]

Examples of some sterols include: 3alpha-sterols (3alpha-hydroxysteroids) 3beta-sterols (3beta-hydroxysteroids) Cholesterol Lanosterol cholecalciferols hydroxycholecalciferols calcifediol (25-hydroxyvitamin D) dihydroxycholecalciferols calcitriol (1,25-dihydroxyvitamin D) 24,25-dihydroxycholecalciferol Ergocalciferols Fusidic Acid Phytosterols Solanine (alpha-Solanin)

More examples of sterols (3-hydroxysteroids) include:

adosterol (6-iodomethylnorcholesterol) androstane sterol cycloartane sterol

ergostane sterol estrane sterol lanostane sterol oxysterol

pregnane sterol stigmastane sterol delta5,delta7-sterol delta7-sterol

3beta-hydroxy-16alpha,17alpha-epoxypregnenolone 5-dehydroepisterol 6alpha-hydroxycholestanol 6-deoxotyphasterol

**

_[36511]

“Steroid Class [ST02 Class]”  

Steroids

  In our body, a Steroids are fat-soluble, hormonally (biologically) active steroidal and/or sterol compounds whose molecules contain a system of 4 rings made from up to 27 carbon atoms linked in a specific way, in which different functional groups hang off the rings, determining the biological effect in the body. Some hormones are steroidal.

Steroids are Polycyclic Compounds

  In biochemistry, a Steroids are a group of fused-ring polycyclic compounds closely to terpenes (isoprenoids). Steroids have a common nucleus, a fused, reduced 17-carbon atom ring system, cyclopentanoperhydrophenanthrene, most steroids have two methyl groups and an aliphatic side-chain attached to the nucleus.
  Examples of substances in which steroid may be the functional parent includes:

androstane bufanolide campestane cardanolide

cardenolide cholane cholestane ergostane

estrane furostan gonane gorgostane

poriferastane pregnane spirostan stigmastane

**

_[36512]

“Secosteroids (Seco-Steroids)”  

Secosteroids [ST03]

  In lipid science, the fused-ring polycyclic compounds known as Secosteroids (Seco-Steroids) are steroids in which the fission of one or more ring structures and concomitant addition of a hydrogen atom at each terminal group has occurred.
  Examples of seco-steroid subsets, subjects, concepts and related entities include:

hydroxy seco-steroids vitamin D vitamers oxo seco-steroids physalin

seco-androstanes seco-cholestanes seco-ergostanes seco-pregnanes

  Examples of the secosteroids, aka seco-steroids also include:

• vitamin D family
  • cholecalciferols
    • hydroxycholecalciferols
      • calcifediol (25-hydroxyvitamin D)
      • dihydroxycholecalciferols
        • calcitriol (1,25-dihydroxyvitamin D)
        • 24,25-dihydroxycholecalciferol
  • ergocalciferols
    • cholecalciferols
    • 25-hydroxyvitamin D (calcifediol)

**

_[38503]

“Bile Acids and Bile Acids Derivatives [ST04] ”  

Bile Acid

  In our body, the amphipathic, Bile Acids are steroid acids found predominantly in the bile fluids (gall), with the primary bile acids being biosynthesized from cholesterol in liver hepatocytes and the secondary bile acids synthesized by anaerobic bacteria in the distal intestine.
In our body, oxysterols as precursors to bile acids, mainly C₂₄ and some C₂₇, are highly water-soluble amphipathic end products of cholesterol catabolism.

Bile Acids

  The five major functions of bile acids include:

• elimination of cholesterol,
• micellination of dietary lipids to aid in their transport,
• stimulation of bile flow,
• biliary phospholipid secretion,
• negative feedback regulation of bile acid and cholesterol synthesis

  Examples of bile acids include:

• primary bile acids
  • cholic acid
  • chenodeoxycholic acid
• secondary bile acids
  • lithocholic acid
  • deoxycholic acid
  • tauroursodeoxycholic acid (TUDCA)

**

_[38504]

“Steroid Conjugates [ST05]”  

  Steroid Conjugates [ST05] **

_[38505]

“Phytosterols (Plant Sterols)”  

Phytosterols

  In phytochemistry, Phytosterols (Plant Sterols) as sterols from plants, are structurally related to cholesterol, some important phytosterols include campesterol, sitosterol, and stigmasterol.
  In plant cells, the Phytosterols (Plant Sterols) as natural constituents of plants belonging to the broad group of isoprenoides contribute to the regulation of the fluidity and permeability of cell membranes, and are substrates for the synthesis of numerous secondary plant metabolites which act as biogenic precursors of compounds involved in growth.
  Examples of phytosterols include:

• Brassinosteroids
• Ecdysteroids
• Sitosterols
• Stigmasterol
• Withanolides

**

_[76018]

“Zoosterols”  

  In nature, sterols in animals may be called Zoosterols, some important zoosterols include the cholesterol and some steroid hormones. **

_[381550]