Chemical Formula: C27H44O
Chemical Formula C27H44O
Found 114 metabolite its formula value is C27H44O
Vitamin D3
Vitamin d3 appears as fine colorless crystals. Water insoluble. (NTP, 1992) Calciol is a hydroxy seco-steroid that is (5Z,7E)-9,10-secocholesta-5,7,10(19)-triene in which the pro-S hydrogen at position 3 has been replaced by a hydroxy group. It is the inactive form of vitamin D3, being hydroxylated in the liver to calcidiol (25-hydroxyvitamin D3), which is then further hydroxylated in the kidney to give calcitriol (1,25-dihydroxyvitamin D3), the active hormone. It has a role as a human metabolite and a geroprotector. It is a seco-cholestane, a hydroxy seco-steroid, a member of D3 vitamins, a secondary alcohol and a steroid hormone. Vitamin D, in general, is a secosteroid generated in the skin when 7-dehydrocholesterol located there interacts with ultraviolet irradiation - like that commonly found in sunlight. Both the endogenous form of vitamin D (that results from 7-dehydrocholesterol transformation), vitamin D3 (cholecalciferol), and the plant-derived form, vitamin D2 (ergocalciferol), are considered the main forms of vitamin d and are found in various types of food for daily intake. Structurally, ergocalciferol differs from cholecalciferol in that it possesses a double bond between C22 and C23 and has an additional methyl group at C24. Finally, ergocalciferol is pharmacologically less potent than cholecalciferol, which makes vitamin D3 the preferred agent for medical use. Appropriate levels of vitamin D must be upheld in the body in order to maintain calcium and phosphorus levels in a healthy physiologic range to sustain a variety of metabolic functions, transcription regulation, and bone metabolism. However, studies are also ongoing to determine whether or not cholecalciferol may also play certain roles in cancer, autoimmune disorders, cardiovascular disease, and other medical conditions that may be associated with vitamin D deficiency. Cholecalciferol is a Vitamin D. Cholecalciferol is a natural product found in Taiwanofungus camphoratus, Theobroma cacao, and other organisms with data available. Cholecalciferol is a steroid hormone produced in the skin when exposed to ultraviolet light or obtained from dietary sources. The active form of cholecalciferol, 1,25-dihydroxycholecalciferol (calcitriol) plays an important role in maintaining blood calcium and phosphorus levels and mineralization of bone. The activated form of cholecalciferol binds to vitamin D receptors and modulates gene expression. This leads to an increase in serum calcium concentrations by increasing intestinal absorption of phosphorus and calcium, promoting distal renal tubular reabsorption of calcium and increasing osteoclastic resorption. Cholecalciferol is only found in individuals that have used or taken this drug. It is a derivative of 7-dehydroxycholesterol formed by ultraviolet rays breaking of the C9-C10 bond. It differs from ergocalciferol in having a single bond between C22 and C23 and lacking a methyl group at C24. [PubChem]The first step involved in the activation of vitamin D3 is a 25-hydroxylation which is catalysed by the 25-hydroxylase in the liver and then by other enzymes. The mitochondrial sterol 27-hydroxylase catalyses the first reaction in the oxidation of the side chain of sterol intermediates. The active form of vitamin D3 (calcitriol) binds to intracellular receptors that then function as transcription factors to modulate gene expression. Like the receptors for other steroid hormones and thyroid hormones, the vitamin D receptor has hormone-binding and DNA-binding domains. The vitamin D receptor forms a complex with another intracellular receptor, the retinoid-X receptor, and that heterodimer is what binds to DNA. In most cases studied, the effect is to activate transcription, but situations are also known in which vitamin D suppresses transcription. Calcitriol increases the serum calcium concentrations by: increasing GI absorption of phosphorus and calcium, increasing osteoclastic resorption, and increasing distal renal tubula... Vitamin D3, also called cholecalciferol, is one of the forms of vitamin D. Vitamin D3 is a steroid hormone that has long been known for its important role in regulating body levels of calcium and phosphorus, in mineralization of bone, and for the assimilation of Vitamin A. It is structurally similar to steroids such as testosterone, cholesterol, and cortisol (although vitamin D3, itself, is a secosteroid). Vitamin D3 is a derivative of 7-dehydroxycholesterol formed by ultraviolet rays breaking the C9-C10 bond. It differs from ergocalciferol in having a single bond between C22 and C23 and lacking a methyl group at C24. Vitamin D3 can also come from dietary sources, such as beef liver, cheese, egg yolks, and fatty fish (PubChem). The first step involved in the activation of vitamin D3 is a 25-hydroxylation catalyzed by 25-hydroxylase in the liver and then by other enzymes. The mitochondrial sterol 27-hydroxylase catalyzes the first reaction in the oxidation of the side chain of sterol intermediates. The active form of vitamin D3 (calcitriol) binds to intracellular receptors that then function as transcription factors to modulate gene expression. Like the receptors for other steroid hormones and thyroid hormones, the vitamin D receptor has hormone-binding and DNA-binding domains. The vitamin D receptor forms a complex with another intracellular receptor, the retinoid-X receptor, and that heterodimer is what binds to DNA. In most cases studied, the effect is to activate transcription, but situations are also known in which vitamin D suppresses transcription. Calcitriol increases the serum calcium concentrations by (1) increasing GI absorption of phosphorus and calcium, (2) increasing osteoclastic resorption, and (3) increasing distal renal tubular reabsorption of calcium. Calcitriol appears to promote intestinal absorption of calcium through binding to the vitamin D receptor in the mucosal cytoplasm of the intestine. Subsequently, calcium is absorbed through the formation of a calcium-binding protein. Vitamin d, also known as colecalciferol or calciol, belongs to vitamin d and derivatives class of compounds. Those are compounds containing a secosteroid backbone, usually secoergostane or secocholestane. Thus, vitamin d is considered to be a secosteroid lipid molecule. Vitamin d is practically insoluble (in water) and an extremely weak acidic compound (based on its pKa). Vitamin d can be found in a number of food items such as dumpling, vinegar, chocolate, and margarine, which makes vitamin d a potential biomarker for the consumption of these food products. Vitamin d can be found primarily in blood and urine. Vitamin d is a non-carcinogenic (not listed by IARC) potentially toxic compound. Vitamin d is a drug which is used for the treatment of vitamin d deficiency or insufficiency, refractory rickets (vitamin d resistant rickets), familial hypophosphatemia and hypoparathyroidism, and in the management of hypocalcemia and renal osteodystrophy in patients with chronic renal failure undergoing dialysis. also used in conjunction with calcium in the management and prevention of primary or corticosteroid-induced osteoporosis. A - Alimentary tract and metabolism > A11 - Vitamins > A11C - Vitamin a and d, incl. combinations of the two > A11CC - Vitamin d and analogues COVID info from clinicaltrial, clinicaltrials, clinical trial, clinical trials D000077264 - Calcium-Regulating Hormones and Agents D018977 - Micronutrients > D014815 - Vitamins D050071 - Bone Density Conservation Agents Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS
4-cholesten-3-one
Cholestenone belongs to the class of organic compounds known as cholesterols and derivatives. Cholesterols and derivatives are compounds containing a 3-hydroxylated cholestane core. Thus, cholestenone is considered to be a sterol lipid molecule. Cholestenone is a very hydrophobic molecule, practically insoluble in water, and relatively neutral. Cholestenone is a dehydrocholestanone. It is a product of cholesterol oxidase {EC 1.1.3.6] in the Bile acid biosynthesis pathway (KEGG). [HMDB] Cholestenone (4-Cholesten-3-one), the intermediate oxidation product of cholesterol, is metabolized primarily in the liver. Cholestenone is highly mobile in membranes and influences cholesterol flip-flop and efflux. Cholestenone may cause long-term functional defects in cells[1][2]. Cholestenone (4-Cholesten-3-one), the intermediate oxidation product of cholesterol, is metabolized primarily in the liver. Cholestenone is highly mobile in membranes and influences cholesterol flip-flop and efflux. Cholestenone may cause long-term functional defects in cells[1][2].
7-Dehydrocholesterol
7-Dehydrocholesterol (7-DHC), also known as provitamin D3 or 5,7-cholestadien-3-b-ol, belongs to the class of organic compounds known as cholesterols and derivatives. Cholesterols and derivatives are compounds containing a 3-hydroxylated cholestane core. Thus, 7-dehydrocholesterol is also classified as a sterol. 7-Dehydrocholesterol is known as a zoosterol, meaning that it is a sterol isolated from animals (to distinguish those sterols isolated from plants which are called phytosterols). 7-DHC functions in the serum as a cholesterol precursor and is photochemically converted to vitamin D3 in the skin. Therefore 7-DHC functions as provitamin-D3. The presence of 7-DHC in human skin enables humans and other mammals to manufacture vitamin D3 (cholecalciferol) from ultraviolet rays in the sun light, via an intermediate isomer pre-vitamin D3. 7-DHC absorbs UV light most effectively at wavelengths between 290 and 320 nm and, thus, the production of vitamin D3 will occur primarily at those wavelengths (PMID: 9625080). The two most important factors that govern the generation of pre-vitamin D3 are the quantity (intensity) and quality (appropriate wavelength) of the UVB irradiation reaching the 7-dehydrocholesterol deep in the stratum basale and stratum spinosum (PMID: 9625080). 7-DHC is also found in the milk of several mammalian species, including cows (PMID: 10999630; PMID: 225459). It was discovered by Nobel-laureate organic chemist Adolf Windaus. 7-DHC can be produced by animals and plants via different pathways (PMID: 23717318). It is not produced by fungi in significant amounts. 7-DHC is made by some algae and can also be produced by some bacteria. 7-Dehydrocholesterol is a zoosterol (a sterol produced by animals rather than plants). It is a provitamin-D. The presence of this compound in skin enables humans to manufacture vitamin D3 from ultra-violet rays in the sun light, via an intermediate isomer provitamin D3. It is also found in breast milk. [HMDB] D018977 - Micronutrients > D014815 - Vitamins > D000072664 - Provitamins 7-Dehydrocholesterol is biosynthetic precursor of cholesterol and vitamin D3. 7-Dehydrocholesterol is biosynthetic precursor of cholesterol and vitamin D3.
Desmosterol
Desmosterol is an intermediate in the synthesis of cholesterol. Desmosterolosis is a rare autosomal recessive inborn errors of cholesterol synthesis that is caused by defective activity of desmosterol reductase which results in an accumulation of demosterol (DHCR24, EC 1.3.1.72), combines a severe osteosclerotic skeletal dysplasia and includes 2-3 toe syndactyly with Smith-Lemli-Opitz syndrome (SLOS; the biochemical block in SLOS results in decreased cholesterol levels and increased 7-dehydrocholesterol levels). Desmosterolosis is caused by mutation of the 24-dehydrocholesterol reductase gene (DHCR24). Many of the malformations in SLOS and desmosterolosis are consistent with impaired hedgehog function. The hedgehog proteins include Sonic hedgehog (SHH), which plays a major role in midline patterning and limb development. Desmosterolosis, caused by defective activity of desmosterol reductase, combines a severe osteosclerotic skeletal dysplasia. 7-dehydrocholesterol reductase (DHCR7, EC 1.3.1.21) reduces the C7-C8 double bond in the sterol B ring to form cholesterol or desmosterol depending upon the precursor. Desmosterol can be converted to cholesterol by DHCR24. Therefore, SLOS and Desmosterolosis patients invariably have elevated levels of cholesterol precursors 7-dehydrocholesterol (and its spontaneous isomer 8-dehydrocholesterol) and absent desmosterol. (PMID: 14631207, 16207203). Desmosterol is found in many foods, some of which are fig, sago palm, mexican groundcherry, and pepper (c. frutescens). Desmosterol is an intermediate in the synthesis of cholesterol. Desmosterolosis is a rare autosomal recessive inborn errors of cholesterol synthesis that is caused by defective activity of desmosterol reductase which results in an accumulation of demosterol (DHCR24, EC 1.3.1.72), combines a severe osteosclerotic skeletal dysplasia and includes 2-3 toe syndactyly with Smith-Lemli-Opitz syndrome (SLOS; the biochemical block in SLOS results in decreased cholesterol levels and increased 7-dehydrocholesterol levels). Desmosterolosis is caused by mutation of the 24-dehydrocholesterol reductase gene (DHCR24). Many of the malformations in SLOS and desmosterolosis are consistent with impaired hedgehog function. The hedgehog proteins include Sonic hedgehog (SHH), which plays a major role in midline patterning and limb development. Desmosterolosis, caused by defective activity of desmosterol reductase, combines a severe osteosclerotic skeletal dysplasia. 7-dehydrocholesterol reductase (DHCR7, EC 1.3.1.21) reduces the C7-C8 double bond in the sterol B ring to form cholesterol or desmosterol depending upon the precursor. Desmosterol can be converted to cholesterol by DHCR24. Therefore, SLOS and Desmosterolosis patients invariably have elevated levels of cholesterol precursors 7-dehydrocholesterol (and its spontaneous isomer 8-dehydrocholesterol) and absent desmosterol. (PMID: 14631207, 16207203). Desmosterol is a molecule similar to cholesterol. Desmosterol is the immediate precursor of cholesterol in the Bloch pathway of cholesterol biosynthesis. Desmosterol, as an endogenous metabolite, used to study cholesterol metabolism[1]. Desmosterol is a molecule similar to cholesterol. Desmosterol is the immediate precursor of cholesterol in the Bloch pathway of cholesterol biosynthesis. Desmosterol, as an endogenous metabolite, used to study cholesterol metabolism[1].
Zymosterol intermediate 2
Zymosterol, also known as 5alpha-cholesta-8,24-dien-3beta-ol or delta8,24-cholestadien-3beta-ol, belongs to cholesterols and derivatives class of compounds. Those are compounds containing a 3-hydroxylated cholestane core. Thus, zymosterol is considered to be a sterol lipid molecule. Zymosterol is practically insoluble (in water) and an extremely weak acidic compound (based on its pKa). Zymosterol can be synthesized from 5alpha-cholestane. Zymosterol is also a parent compound for other transformation products, including but not limited to, 4beta-methylzymosterol-4alpha-carboxylic acid, 3-dehydro-4-methylzymosterol, and zymosterol intermediate 1b. Zymosterol can be found in a number of food items such as squashberry, hard wheat, salmonberry, and loquat, which makes zymosterol a potential biomarker for the consumption of these food products. Zymosterol exists in all eukaryotes, ranging from yeast to humans. In humans, zymosterol is involved in several metabolic pathways, some of which include zoledronate action pathway, alendronate action pathway, pravastatin action pathway, and atorvastatin action pathway. Zymosterol is also involved in several metabolic disorders, some of which include cholesteryl ester storage disease, lysosomal acid lipase deficiency (wolman disease), smith-lemli-opitz syndrome (SLOS), and chondrodysplasia punctata II, X linked dominant (CDPX2). Zymosterol is an intermediate in cholesterol biosynthesis. Disregarding some intermediate compounds (e.g. 4-4-dimethylzymosterol) lanosterol can be considered a precursor of zymosterol in the cholesterol synthesis pathway. The conversion of zymosterol into cholesterol happens in the endoplasmic reticulum. Zymosterol accumulates quickly in the plasma membrane coming from the cytosol. The movement of zymosterol across the cytosol is more than twice as fast as the movement of cholesterol itself . Zymosterol is the precursor of cholesterol and is found in the plasma membrane. zymosterol circulates within the cells. The structural features of zymosterol provided optimal substrate acceptability. In human fibroblasts, zymosterol is converted to cholesterol solely in the rough ER. Little or no zymosterol or cholesterol accumulates in the rough ER in vivo. Newly synthesized zymosterol moves to the plasma membrane without a detectable lag and with a half-time of 9 min, about twice as fast as cholesterol. The pool of radiolabeled zymosterol in the plasma membrane turns over rapidly, faster than does intracellular cholesterol. Thus, plasma membrane zymosterol is not stagnant. [3H]Zymosterol pulsed into intact cells is initially found in the plasma membrane. (PMID: 1939176). COVID info from COVID-19 Disease Map Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS
Previtamin D3
Previtamin D3 is an intermediate in the production of Vitamin D. [HMDB] Previtamin D3 is an intermediate in the production of Vitamin D.
5alpha-Cholesta-7,24-dien-3beta-ol
5alpha-Cholesta-7,24-dien-3beta-ol belongs to the class of organic compounds known as cholesterols and derivatives. Cholesterols and derivatives are compounds containing a 3-hydroxylated cholestane core. Thus, 5alpha-cholesta-7,24-dien-3beta-ol is considered to be a sterol lipid molecule. 5alpha-Cholesta-7,24-dien-3beta-ol is involved in the biosynthesis of steroids. 5alpha-Cholesta-7,24-dien-3beta-ol is reversibly converted into 5alpha-cholest-7-en-3beta-ol by delta24-sterol reductase (EC 1.3.1.72). 5alpha-Cholesta-7,24-dien-3beta-ol is also converted into zymosterol by cholestenol delta-isomerase (EC 5.3.3.5). 5alpha-Cholesta-7,24-dien-3beta-ol is also converted into 7-Dehydrodesmosterol. 5alpha-Cholesta-7,24-dien-3beta-ol is a substrate for 3-beta-hydroxysteroid-delta(8),delta(7)-isomerase. 5alpha-Cholesta-7,24-dien-3beta-ol is involved in the biosynthesis of steroids. 5alpha-Cholesta-7,24-dien-3beta-ol is reversibly converted to 5alpha-Cholest-7-en-3beta-ol by delta24-sterol reductase [EC:1.3.1.72]. 5alpha-Cholesta-7,24-dien-3beta-ol is also converted to zymosterol by cholestenol delta-isomerase [EC:5.3.3.5]. 5alpha-Cholesta-7,24-dien-3beta-ol is also converted to 7-Dehydrodesmosterol. 5a-Cholesta-7,24-dien-3b-ol is a substrate for 3-beta-hydroxysteroid-delta(8),delta(7)-isomerase. [HMDB]
cholest-5-en-3-one
A 3-oxo Delta(5)-steroid that is cholesterol in which the alcoholic hydroxy group has been oxidised to the corresponding ketone.
5alpha-Cholest-7-en-3-one
5alpha-Cholest-7-en-3-one is found in milk and milk products. 5alpha-Cholest-7-en-3-one is isolated from butterfa Constituent of the edible shiitake mushroom (Lentinus edodes)
8-Dehydrocholesterol
8-Dehydrocholesterol (8-DHC) elevated concentration is one of the diagnostic biochemical hallmarks of classical Smith-Lemli-Opitz syndrome (SLOS). Plasma 8-DHC could be only marginally elevated. (PMID: 16435228). Smith-Lemli-Opitz syndrome (SLOS) is an autosomal recessive condition caused by a defect in cholesterol synthesis (caused by a deficit of 3beta-hydroxysterol-Delta7 reductase). Affected children often have malformations and mental retardation. Autistic behaviors also are evident. In children, the baseline cholesterol, 8-DHC levels, and cholesterol levels following supplementation does not correlate with the presence or severity of autistic symptoms. (PMID: 16761297). Accumulation of 8-dehydrocholesterol in Amniotic fluid is diagnostic for SLOS. (PMID 16231320). 8-Dehydrocholesterol (8-DHC) elevated concentration is one of the diagnostic biochemical hallmarks of classical Smith-Lemli-Opitz syndrome (SLOS) . Plasma 8-DHC could be only marginally elevated. (PMID: 16435228) 8-Dehydrocholesterol elevated concentration is one of the diagnostic biochemical hallmarks of classical Smith-Lemli-Opitz syndrome (SLOS).
Lumisterol 3
Lumisterol 3 is a normal human secosterooid metabolite from the class of vitamin D3 photoisomer derivatives. It is synthesized from 7-Dehydrocholesterol in the epidermis in response to ultraviolet irradiation. When human skin is exposed to ultraviolet radiation, epidermal 7-dehydrocholesterol is converted to previtamin D, and during prolonged exposure, the synthesis of previtamin D3 reaches a plateau at about 10 to 15 percent of the original 7-dehydrocholesterol content, and previtamin D3 is photoisomerized to two biologically inert isomers and lumisterol 3 is one of them (the other one being lumisterol 3). Therefore, lumisterol 3 is a metabolite to chronic exposure to sunlight. Lumisterol 3, as well as other photoisomers of vitamin D3 and previtamin D3 has been demonstrated to have inhibited keratinocyte proliferation. Thus, sunlight provides vitamin D3 photoproducts that may act directly to regulate epidermal proliferation and differentiation under physiologic conditions. (PMID 6256855, 10876100) [HMDB] Lumisterol 3 is a normal human secosterooid metabolite from the class of vitamin D3 photoisomer derivatives. It is synthesized from 7-Dehydrocholesterol in the epidermis in response to ultraviolet irradiation. When human skin is exposed to ultraviolet radiation, epidermal 7-dehydrocholesterol is converted to previtamin D, and during prolonged exposure, the synthesis of previtamin D3 reaches a plateau at about 10 to 15 percent of the original 7-dehydrocholesterol content, and previtamin D3 is photoisomerized to two biologically inert isomers and lumisterol 3 is one of them (the other one being lumisterol 3). Therefore, lumisterol 3 is a metabolite to chronic exposure to sunlight. Lumisterol 3, as well as other photoisomers of vitamin D3 and previtamin D3 has been demonstrated to have inhibited keratinocyte proliferation. Thus, sunlight provides vitamin D3 photoproducts that may act directly to regulate epidermal proliferation and differentiation under physiologic conditions. (PMID 6256855, 10876100).
Tachysterol 3
Tachysterol 3 is a normal human secosterooid metabolite from the class of vitamin D3 photoisomer derivatives. It is synthesized from 7-Dehydrocholesterol in the epidermis in response to ultraviolet irradiation. When human skin is exposed to ultraviolet radiation, epidermal 7-dehydrocholesterol is converted to previtamin D, and during prolonged exposure, the synthesis of previtamin D3 reaches a plateau at about 10 to 15 percent of the original 7-dehydrocholesterol content, and previtamin D3 is photoisomerized to two biologically inert isomers and tachysterol 3 is one of them (the other one being lumisterol 3). Therefore, tachysterol is a metabolite to chronic exposure to sunlight. Tachysterol 3, as well as other photoisomers of vitamin D3 and previtamin D3 has been demonstrated to have inhibited keratinocyte proliferation. Thus, sunlight provides vitamin D3 photoproducts that may act directly to regulate epidermal proliferation and differentiation under physiologic conditions. (PMID 6256855, 10876100) [HMDB] Tachysterol 3 is a normal human secosterooid metabolite from the class of vitamin D3 photoisomer derivatives. It is synthesized from 7-Dehydrocholesterol in the epidermis in response to ultraviolet irradiation. When human skin is exposed to ultraviolet radiation, epidermal 7-dehydrocholesterol is converted to previtamin D, and during prolonged exposure, the synthesis of previtamin D3 reaches a plateau at about 10 to 15 percent of the original 7-dehydrocholesterol content, and previtamin D3 is photoisomerized to two biologically inert isomers and tachysterol 3 is one of them (the other one being lumisterol 3). Therefore, tachysterol is a metabolite to chronic exposure to sunlight. Tachysterol 3, as well as other photoisomers of vitamin D3 and previtamin D3 has been demonstrated to have inhibited keratinocyte proliferation. Thus, sunlight provides vitamin D3 photoproducts that may act directly to regulate epidermal proliferation and differentiation under physiologic conditions. (PMID 6256855, 10876100).
5,6-trans-Vitamin D3
5,6-trans-vitamin D3 is the result of photodegradation of vitamin D3, and once formed in the skin, exposure to sunlight results in its rapid photodegradation to a variety of photoproducts. During chronic exposure to sunlight vitamin D3 in the skin can be photoisomerized to a variety of photoproducts, including 5,6-trans-vitamin D3. Because 5,6-Trans-vitamin D3 is a photoproduct of vitamin D3 and have a pseudo-1-alpha-hydroxyl structure due to the 180-degree rotation of the 3-hydroxyl group during isomerization. 5,6-trans-vitamin D3 can mimic the intestinal calcium transport activity of 1alpha,25(OH)2D (the active form of vitamine D). (PMID: 10876100, 2541158). 5,6-trans-vitamin D3 is the result of photodegradation of vitamin D3, and once formed in the skin, exposure to sunlight results in its rapid photodegradation to a variety of photoproducts.
5Alpha-cholesta-8-en-3-one
5Alpha-cholesta-8-en-3-one is involved in the cholesterol biosynthesis II(via 24,25-dihydrolanosterol) pathway. It can be generated from the enzymatic reduction of 4a-methyl-cholesta-8-enol or enzymatic oxidation of 4a-carboxy-4b-methyl-5a-cholesta-8-en-3b-ol.The sequence of reactions and the types of intermediates in cholesterol biosynthesis may vary. Alternate routes exist because reduction of the carbon 24,25 double bond on the hydrocarbon side chain of the sterol ring structure by sterol delta24-reductase can occur at multiple points in the pathway, giving rise to different intermediates. These intermediates, with or without a double bond in the hydrocarbon side chain, can serve as substrates for the other enzymes in the pathway. [HMDB] 5Alpha-cholesta-8-en-3-one is involved in the cholesterol biosynthesis II(via 24,25-dihydrolanosterol) pathway. It can be generated from the enzymatic reduction of 4a-methyl-cholesta-8-enol or enzymatic oxidation of 4a-carboxy-4b-methyl-5a-cholesta-8-en-3b-ol.The sequence of reactions and the types of intermediates in cholesterol biosynthesis may vary. Alternate routes exist because reduction of the carbon 24,25 double bond on the hydrocarbon side chain of the sterol ring structure by sterol delta24-reductase can occur at multiple points in the pathway, giving rise to different intermediates. These intermediates, with or without a double bond in the hydrocarbon side chain, can serve as substrates for the other enzymes in the pathway.
5-alpha-Cholesta-7,24-dien-3-beta-ol
5-alpha-cholesta-7,24-dien-3-beta-ol is part of the Steroid biosynthesis pathway. It is a substrate for: Delta(24)-sterol reductase.
5alpha-cholest-8-en-3-one
5alpha-cholest-8-en-3-one is considered to be practically insoluble (in water) and basic. 5alpha-cholest-8-en-3-one is a sterol lipid molecule
Provitina
1-Cholesten-3-one
Cholest-5-EN-3-one
Cholest-5-en-3-one belongs to cholesterols and derivatives class of compounds. Those are compounds containing a 3-hydroxylated cholestane core. Cholest-5-en-3-one is practically insoluble (in water) and an extremely weak acidic compound (based on its pKa). Cholest-5-en-3-one can be found in a number of food items such as pepper (c. chinense), walnut, pepper (spice), and vaccinium (blueberry, cranberry, huckleberry), which makes cholest-5-en-3-one a potential biomarker for the consumption of these food products.
23-Dehydrocholesterol
23-dehydrocholesterol is practically insoluble (in water) and an extremely weak acidic compound (based on its pKa). 23-dehydrocholesterol can be found in sunflower, which makes 23-dehydrocholesterol a potential biomarker for the consumption of this food product.
delta-24-Cholesterol
Delta-24-cholesterol is practically insoluble (in water) and an extremely weak acidic compound (based on its pKa). Delta-24-cholesterol can be found in apricot, which makes delta-24-cholesterol a potential biomarker for the consumption of this food product.
(10S)-3c-Hydroxy-10r.13c-dimethyl-17c-((R)-1.5-dimethyl-hexyl)-(5tH)-Delta8.14-dodecahydro-1H-cyclopenta[a]phenanthren|3beta-Hydroxy-10.13-dimethyl-17beta-((R)-1.5-dimethyl-hexyl)-5alpha-gonadien-(8.14)|3beta-hydroxy-5alpha-cholest-8,14-diene|3beta-Hydroxy-5alpha-cholestadien-(8,14)|5alpha-cholest-8,14-dien-3beta-ol|5alpha-Cholesta-8,14-dien-3beta-ol|5alpha-cholestadien-(8,14)-ol-(3beta)|Cholesta-8,14-dien-3beta-ol
(22E,24R)-27-nor-24-methylcholesta-5,22-dien-3beta-ol|24-Epioccelasterol|24-Methylcholesta-5,22(E)-dien-3beta-ol|27-Nor-24-methylcholesta-5alpha,22(E)-dien-3beta-ol|27-nor-24xi-methylcholesta-5,22E-dien-3beta-ol
22-trans-27-nor-(24S)-24-methylcholesta-7,22-dien-3beta-ol od. Amuresterol|Amuresterol
3beta-(hydroxymethyl)-A-nor-5alpha-cholesta-15,22-diene
3beta-(hydroxymethyl)-A-nor-5alpha-E-cholesta-7,22-diene
(22E)-5alpha-cholest-7,22-dien-3beta-ol|(22E)-5alpha-cholesta-7,22-dien-3beta-ol|5alpha-cholesta-7,22-dien-3beta-ol
(22E,24S)-24-methyl-27-nor-5alpha-cholesta-8,22-dien-3beta-ol
10,13-dimethyl-17-(6-methylheptan-2-yl)-2,3,8,9,11,12,14,15,16,17-decahydro-1H-cyclopenta[a]phenanthren-3-ol
(3beta, 5alpha, 22E)-Cholesta-22, 24-dien-3-ol, 9CI
(22E)-27-nor-(24xi)-24-methylcholesta-5,22-dien-3beta-ol
3beta-(hydroxymethyl)-A-nor-5alpha-E-(24S)-27-norergosta-7,22-diene|3beta-(hydroxymethyl)-A-normuresterol
(3S,10R,13S,17R)-10,13-dimethyl-17-(6-methylhept-1-en-2-yl)-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-ol|Cholesta-5,20(21)-dien-3beta-ol|cholesta-5,20-dien-3beta-ol|cholesta-5,20-diene-3beta-ol
Vitamin D3
relative retention time with respect to 9-anthracene Carboxylic Acid is 1.784
7-Dehydrocholesterol
D018977 - Micronutrients > D014815 - Vitamins > D000072664 - Provitamins 7-Dehydrocholesterol is biosynthetic precursor of cholesterol and vitamin D3. 7-Dehydrocholesterol is biosynthetic precursor of cholesterol and vitamin D3.
Cholestenone
Cholestenone (4-Cholesten-3-one), the intermediate oxidation product of cholesterol, is metabolized primarily in the liver. Cholestenone is highly mobile in membranes and influences cholesterol flip-flop and efflux. Cholestenone may cause long-term functional defects in cells[1][2]. Cholestenone (4-Cholesten-3-one), the intermediate oxidation product of cholesterol, is metabolized primarily in the liver. Cholestenone is highly mobile in membranes and influences cholesterol flip-flop and efflux. Cholestenone may cause long-term functional defects in cells[1][2].
4-Cholesten-3-one
Cholestenone (4-Cholesten-3-one), the intermediate oxidation product of cholesterol, is metabolized primarily in the liver. Cholestenone is highly mobile in membranes and influences cholesterol flip-flop and efflux. Cholestenone may cause long-term functional defects in cells[1][2]. Cholestenone (4-Cholesten-3-one), the intermediate oxidation product of cholesterol, is metabolized primarily in the liver. Cholestenone is highly mobile in membranes and influences cholesterol flip-flop and efflux. Cholestenone may cause long-term functional defects in cells[1][2].
Desmesterol
A cholestanoid that is cholesta-5,24-diene substituted by a beta-hydroxy group at position 3. It is an intermediate metabolite obtained during the synthesis of cholesterol. Desmosterol is a molecule similar to cholesterol. Desmosterol is the immediate precursor of cholesterol in the Bloch pathway of cholesterol biosynthesis. Desmosterol, as an endogenous metabolite, used to study cholesterol metabolism[1]. Desmosterol is a molecule similar to cholesterol. Desmosterol is the immediate precursor of cholesterol in the Bloch pathway of cholesterol biosynthesis. Desmosterol, as an endogenous metabolite, used to study cholesterol metabolism[1].
1α-hydroxy-3-deoxyvitamin D3 / 1α-hydroxy-3-deoxycholecalciferol
(5E)-vitamin D3 / (5E)-cholecalciferol / (5E)-calciol
(5E)-3-epivitamin D3 / (5E)-3-epicholecalciferol
trans-Vitamin D3
5alpha-Cholest-7-en-3-one
5-alpha-Cholesta-7,24-dien-3-beta-ol
Zymosterol
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7-DHC
D018977 - Micronutrients > D014815 - Vitamins > D000072664 - Provitamins 7-Dehydrocholesterol is biosynthetic precursor of cholesterol and vitamin D3. 7-Dehydrocholesterol is biosynthetic precursor of cholesterol and vitamin D3.
8-DHC
8-Dehydrocholesterol elevated concentration is one of the diagnostic biochemical hallmarks of classical Smith-Lemli-Opitz syndrome (SLOS).
previtamin D3 / precholecalciferol / (6Z)-tacalciol
(7E)-(3S,6S)-6,19-cyclo-9,10-seco-5(10),7-cholestadien-3-ol
5alpha-Cholesta-8,14-dien-3beta-ol
A 3beta-sterol that is 5alpha-cholestane-3beta-ol having double bonds at the 8,9- and 14,15- positions.
Zymostrol
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5,6-trans-Vitamin D3
A member of the class of D3 vitamins that is calciol in which the double bond at position 5 adopts a trans-configuration. During exposure to sunlight, previtamin D3 and vitamin D3 in the skin become photoisomerized to 5,6-trans-vitamin D3.
(3E)-3-[(2Z)-2-[7a-methyl-1-(6-methylheptan-2-yl)-2,3,3a,5,6,7-hexahydro-1H-inden-4-ylidene]ethylidene]-4-methylidenecyclohexan-1-ol
(3S,10R,13R)-10,13-dimethyl-17-[(E,2R)-6-methylhept-4-en-2-yl]-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-ol
(6R)-6-[(8S,9S,10R,13R,14S,17R)-10,13-dimethyl-2,3,6,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl]-2-methylheptan-3-one
3-{2-[7-(1,5-Dimethylhexyl)-6-methylbicyclo[4.3.0]non-2-ylidene]ethylidene}-4-methylenecyclohexan-1-ol
Cholest-4-en-3-one
A cholestanoid that is cholest-4-ene substituted by an oxo group at position 3. Cholestenone (4-Cholesten-3-one), the intermediate oxidation product of cholesterol, is metabolized primarily in the liver. Cholestenone is highly mobile in membranes and influences cholesterol flip-flop and efflux. Cholestenone may cause long-term functional defects in cells[1][2]. Cholestenone (4-Cholesten-3-one), the intermediate oxidation product of cholesterol, is metabolized primarily in the liver. Cholestenone is highly mobile in membranes and influences cholesterol flip-flop and efflux. Cholestenone may cause long-term functional defects in cells[1][2].
Previtamin D3
A hydroxy seco-steroid which is an intermediate in the production of vitamin D3 in human skin.
(3S,5S,10S,13R,14R,17R)-10,13-dimethyl-17-[(2R)-6-methylhept-5-en-2-yl]-2,3,4,5,6,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-ol
8-Dehydrocholesterol
8-Dehydrocholesterol elevated concentration is one of the diagnostic biochemical hallmarks of classical Smith-Lemli-Opitz syndrome (SLOS).
Tachysterol 3
A hydroxy seco-steroid that results from the photoisomerization of previtamin D3.
10,13-Dimethyl-17-(6-methylheptan-2-yl)-1,2,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-3-one
Calciol
A hydroxy seco-steroid that is (5Z,7E)-9,10-secocholesta-5,7,10(19)-triene in which the pro-S hydrogen at position 3 has been replaced by a hydroxy group. It is the inactive form of vitamin D3, being hydroxylated in the liver to calcidiol (25-hydroxyvitamin D3), which is then further hydroxylated in the kidney to give calcitriol (1,25-dihydroxyvitamin D3), the active hormone.
ZyE(0:0)
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