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  • sitosterol
  • Green microalgae are shown to have a variety of compositions including some with simple distributions of sterols dominated by the C 29 sterol 24-ethylcholest-5-en-3β-ol (sitosterol) more commonly associated with higher plants. (springer.com)
  • 1995
  • Barrett SM, Volkman JK, Dunstan GA, LeRoi JM (1995) Sterols of 14 species of marine diatoms (Bacillariophyta). (springer.com)
  • Delta24
  • The systematic name of this enzyme class is sterol:NADP+ Delta24-oxidoreductase. (wikipedia.org)
  • Other names in common use include sterol Delta24(28)-methylene reductase, and sterol Delta24(28)-reductase. (wikipedia.org)
  • Other names in common use include Delta24-methyltransferase, Delta24-sterol methyltransferase, zymosterol-24-methyltransferase, S-adenosyl-4-methionine:sterol Delta24-methyltransferase, SMT1, 24-sterol C-methyltransferase, S-adenosyl-L-methionine:Delta24(23)-sterol methyltransferase, and phytosterol methyltransferase. (wikipedia.org)
  • desaturase
  • C-5 sterol desaturase couples sterol oxidation to the oxidation of NAD(P)H and the reduction of molecular oxygen. (wikipedia.org)
  • In plants such as Arabidopsis thaliana, C-5 sterol desaturase catalyzes the dehydrogenation of episterol and avenasterol in a pathway thought to lead to a variety of membrane components as well as a class of hormones called brassinosteroids. (wikipedia.org)
  • Based on its amino acid profile C-5 sterol desaturase appears to have four to five membrane-spanning regions, suggesting that it is a transmembrane protein. (wikipedia.org)
  • Consequently, in both the pathogenic fungus Candida albicans and model organism S. cerevisiae mutations in the gene encoding C-5 sterol desaturase (ERG3) allow the cell to avoid synthesizing the toxic sterol products and have been shown to confer azole resistance. (wikipedia.org)
  • In at least one patient, a deficiency in C-5 sterol desaturase activity (termed lathosterolosis) was associated with multiple malformations, metal retardation, and liver disease. (wikipedia.org)
  • Scientists have found that tomato plants engineered with the C-5 sterol desaturase from the mushroom Flammulina velutipes show improved drought tolerance and fungal pathogen resistance as well as increased iron and polyunsaturated fat content. (wikipedia.org)
  • methyl
  • Sterols with a methyl group at C-23 are also surprisingly common showing that this feature is not unique to dinoflagellate sterols. (springer.com)
  • Akihisa T, Hori T, Suzuki H, Sakoh T, Yokota T, Tamura T (1992) 24β-Methyl-5α-cholest-9(11)-en-3β-ol, two 24β-alkyl-Δ 5,7,9(11) -sterols and other 24β-alkylsterols from Chlorella v ulgaris . (springer.com)
  • 4α-Methyl-5α-cholesta-8,22-dien-3β-ol and 4α,24-dimethyl-5α-cholesta-8,22-dien-3β-ol: two novel sterols from Porphyridium cruentum . (springer.com)
  • The systematic name of this enzyme class is sterol,NADPH:oxygen oxidoreductase (14-methyl cleaving). (wikipedia.org)
  • grams a day
  • Corn oil, for example, contains only .13 grams of sterol and scientists recommend two grams a day for measurable results. (ehow.co.uk)
  • membranes
  • We show that diplopterol, the simplest bacterial hopanoid, has similar properties and that hopanoids are bacterial "sterol surrogates" with the ability to order saturated lipids and to form a liquid-ordered phase in model membranes. (pnas.org)
  • SREBPs
  • In cells with low levels of sterols, SREBPs are cleaved to a water-soluble N-terminal domain that is translocated to the nucleus. (wikipedia.org)
  • bacteria
  • However, it is not known whether this capacity exists in organisms that lack sterols, such as bacteria. (pnas.org)
  • include
  • Other names in common use include obtusufoliol 14-demethylase, lanosterol 14-demethylase, lanosterol 14alpha-demethylase, and sterol 14alpha-demethylase. (wikipedia.org)
  • Other names in common use include UDPG:sterol glucosyltransferase, UDP-glucose-sterol beta-glucosyltransferase, sterol:UDPG glucosyltransferase, UDPG-SGTase, uridine diphosphoglucose-poriferasterol glucosyltransferase, uridine diphosphoglucose-sterol glucosyltransferase, sterol glucosyltransferase, sterol-beta-D-glucosyltransferase, and UDP-glucose-sterol glucosyltransferase. (wikipedia.org)
  • Other names in common use include 3beta-hydroxy-4beta-methylcholestenecarboxylate 3-dehydrogenase, (decarboxylating), 3beta-hydroxy-4beta-methylcholestenoate dehydrogenase, 3beta-hydroxy-4beta-methylcholestenoate dehydrogenase, and sterol 4alpha-carboxylic decarboxylase. (wikipedia.org)
  • enzymes
  • Once in the nucleus, SREBP can bind to specific DNA sequences (the sterol regulatory elements or SREs) that are found in the control regions of the genes that encode enzymes needed to make lipids. (wikipedia.org)