| SCP | single-celled protein; standard care plan; sodium cellulose phosphate; soluble cytoplasmic protein; ... |
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| SRE | Schedule of Recent Experiences; sterol regulatory element |
| SREBP | sterol regulatory element binding protein |
| SREBP | 1/sterol regulatory element binding protein |
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| SCP-2 | Sterol Carrier Protein 2 |
| SCP | Sterol Carrier Proteins |
| SCPx | Sterol carrier protein X |
| SRE | Sterol regulatory element |
| sterol 3-beta-glucosyltransferase | <enzyme> A plasma membrane-bound enzyme that catalyses the glucosylation of plant sterols; reaction: sterol + udp-glucose = steryl-3-beta-glucoside + udp Registry number: EC 2.4.1.173 Synonym: udp-glucose sterol beta-d-glucosyltransferase, udpg-sgtase, udp-glucose-sterol-beta-glucosyltransferase (26 Jun 1999) |
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| acyl-CoA sterol acyltransferase | <enzyme> Isolated from saccharomyces cerevisiae; sat1 and sat2 are isoenzymes; genbank u55383 Registry number: EC 2.3.1- Synonym: sat1 gene product, sat2 gene product (26 Jun 1999) |
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| methyl sterol oxidase | <enzyme> Converts sterol 4-methyl to carboxylic acid; requires NADH or NADPH Registry number: EC 1.- Synonym: methyl sterol mixed function oxidase, 4-methyl sterol oxidase, methylsterol oxidase, 4alpha-methylsterol oxidase (26 Jun 1999) |
| phosphatidylcholine-sterol o-acyltransferase | <enzyme> An enzyme secreted from the liver into the plasma of many mammalian species. It catalyses the esterification of the hydroxyl group of lipoprotein cholesterol by the transfer of a fatty acid from the c-2 position of lecithin. In familial lecithin:cholesterol acyltransferase deficiency disease, the absence of the enzyme results in an excess of unesterified cholesterol in plasma. Chemical name: Phosphatidylcholine:sterol O-acyltransferase Registry number: EC 2.3.1.43 (12 Dec 1998) |
| sterol | <chemistry> Any steroid-based alcohol having a hydrocarbon (aliphatic) side-chain of 8-10 carbons at the 17-beta position and a hydroxyl group at the 3-beta position (therfore an alcohol). Cholesterol is a sterol. Because of its hydrophilic property at the -OH end and hydrophobicity at the hydrocarbon side chain, it can be incorporated into the lipid bilayers of the cytoplasmic membrane. However, sterols only exist in the cytoplasmic membranes of eukaryotes while in prokaryotes, virtually none have sterols in their membranes except mycoplasmas, a group of cell wall-less bacteria. (09 Oct 1997) |
| sterol 27-hydroxylase | <enzyme> Performs multiple monooxygenations in the conversion of 5 beta cholestane-3 alpha, 7 alpha, 12 alpha-triol into 3 alpha, 7 alpha, 12 alpha-trihydroxy-5 beta-cholestanoic acid in presence of NADPH and cytochrome p-450 Registry number: EC 1.14.12.- Synonym: cyp27, cytochrome p450 cyp27, c-triol 27-hydroxylase, cyp27 gene product, p450c27 (26 Jun 1999) |
| sterol delta-5 desaturase | <enzyme> Involved in ergosterol synthesis; do not confuse with delta5,7-sterol delta-7-reductase which is involved in cholesterol biosynthesis Registry number: EC 1.3.- Synonym: sterol c5-6 desaturase, c-5 sterol desaturase, erg3 gene product, delta(5,6) sterol desaturase, syr1 gene product, delta(7)-sterol-c-5-desaturase (26 Jun 1999) |
| sterol o-acyltransferase | <enzyme> An enzyme that catalyses the formation of cholesterol esters by the direct transfer of the fatty acid group from a fatty acyl CoA derivative. This enzyme has been found in the adrenal gland, gonads, liver, intestinal mucosa, and aorta of many mammalian species. Chemical name: Acyl-CoA:cholesterol O-acyltransferase Registry number: EC 2.3.1.26 (12 Dec 1998) |
| delta 14-sterol reductase | <enzyme> Reduces ignosterol to ergosterol; NADPH-dependent enzyme that catalyses the formal trans addition of hydrogen across the 14,15-pi bond in 8,14-sterol dienes; forms 4,4-dimethylzymosterol in lanosterol metabolism pathway from 4,4-dimethyl-5alpha-cholesta-8,14,25-trien-3beta-ol or from 4,4-dimethyl-cholesta-8,14,24-trienol; erg24 from saccharomyces cerevisiae Registry number: EC 1.3.1.- Synonym: ignosterol reductase, delta 8,14-sterol delta 14-reductase, 14,15-sterol reductase, delta 8,14-steroid 14-reductase, delta 14,15-reductase, sterol c-14 reductase, c-14 sterol reductase, erg24 gene product (26 Jun 1999) |
| delta-22 sterol desaturase | <enzyme> Catalyses the formation of the sterol side delta-22-double bond from 23-hydroxysterols Registry number: EC 1.3.3.- Synonym: c-22 sterol desaturase, cyp61, cytochrome p-45061, sterol delta22-desaturase (26 Jun 1999) |
| delta 24-sterol methyltransferase | <enzyme> Substrate sterols may be replaced by specific sterol Registry number: EC 2.1.1.41 Synonym: s-adenosylmethionine zymosterol methyltransferase, s-adenosylmethionine-delta 24-sterol-c-methyltransferase, sterol c-24 s-adenosylmethionine methyltransferase, sed6 protein, erg6 protein, (s)-adenosyl-l-methionine-delta 24(25)-sterol methyltransferase (26 Jun 1999) |
| delta 5,7-sterol delta-7-reductase | <enzyme> Involved in cholesterol biosynthesis, introduces the delta-5 bond into delta 7-cholestenol to form 7-dehydrocholesterol Registry number: EC 1.3.1.- Synonym: delta 7-sterol reductase, delta 7-sterol desaturase, delta 7-sterol 5-desaturase (26 Jun 1999) |
| delta(8)-delta(7)-sterol isomerase | <enzyme> Catalyses anaerobic conversion of sterol-8-ene to sterol-7-ene; do not confuse with erg-2 protein from retroviridae Registry number: EC 5.3.3.- Synonym: delta 8 - delta 7 sterol isomerase, c-8 sterol isomerase, erg2 gene product, fungal, sterol 8-isomerase (26 Jun 1999) |
| 4-methyl sterol demethylase | <chemical> This term is used to describe 10 reactions in the collective processes of monooxygenation, decarboxylation and reduction, which, together account for the conversion of each of the two 4-methyl groups of lanosterol to carbon dioxide Chemical name: demethylase, methyl sterol Synonym: 4,4-dimethylzymosterol monooxygenase, sterol 4-demethylase (26 Jun 1999) |
| formyl sterol oxidase | <enzyme> Converts sterol 4-aldehyde to a carboxylic acid in presence of NADH or NADPH Registry number: EC 1.2.1.- (26 Jun 1999) |
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