| sulfatase | 1. Trivial name for enzymes in EC group 3.1.6, the sulfuric ester hydrolases, which catalyze the hydrolysis of sulfuric esters (sulfates) to the corresponding alcohols plus inorganic sulfate; includes aryl-, sterol, glycol-, chondroitin, choline-, cellulose, cerebroside, and chondro-sulfatases. Synonym: arylsulfatase. (05 Mar 2000) |
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| disulfoglucosamine-6-sulfatase | <enzyme> Acts on various n-substituted glucosamine-6-o-sulfates Registry number: EC 3.1.6.11 Synonym: disulphoglucosamine-6-sulphatase, glucosamine o,n-disulfate o-sulfohydrolase, glucosamine sulfatase, n-sulfoglucosamine-6-sulfatase (26 Jun 1999) |
| iduronate sulfatase | <enzyme> An enzyme that specifically cleaves the ester sulfate of iduronic acid, and is required for the desulfation of 2-sulfate iduronate residues in heparan sulfate. It is also required in dermatan sulfate degradation. Its deficiency has been demonstrated in Hunter's syndrome, which is characterised by an excess of dermatan sulfate and heparan sulfate. Chemical name: L-Iduronate-2-sulfate 2-sulfohydrolase Registry number: EC 3.1.6.13 (20 Sep 2002) |
| oligosaccharide 2-O-sulfatase | <enzyme> Hydrolyzes the 2-o-sulfate of the disaccharide 4-deoxy-2-o-sulfato-alpha-l-threo-hex-4-enopyranosyluronic acid-(1-4)-2-deoxy-2-sulfamido-6-o-sulfato-d-glucose from heparin Registry number: EC 3.1.6.- Synonym: flavobacterium heparinum 2-o-sulphatase, heparo-2-o-sulfatase (26 Jun 1999) |
| oligosaccharyl sulfatase | <enzyme> From keyhole limpet; hydrolyzes sulfate esters in asparagine-linked oligosaccharides preferentially to 4-nitrocatechol sulfate Registry number: EC 3.1.6.- (26 Jun 1999) |
| lactate-2-sulfate sulfatase | <enzyme> Shows no activity for (l)-isomer Registry number: EC 3.1.6.- Synonym: d-lactate-2-sulfate sulfatase, d-lactate-2-sulfatase (26 Jun 1999) |
| 3b-hydroxysteroid sulfate sulfatase | <enzyme> An enzyme, found in most mammalian tissues, that is capable of hydrolyzing the sulfate ester bonds of a variety of sulfated sterols; a deficiency of this enzyme will result in X-linked ichthyosis. (05 Mar 2000) |
| anabolic steroid | <endocrinology> A type of steroid hormone that stimulates the synthesis of protein. Anabolic steroids are compounds which stimulate the body into anabolism. This process involves the building of complex compounds from smaller simpler ones (for example proteins are built from amino acids). This process requires energy. (13 Nov 1997) |
| receptors, steroid | Proteins found usually in the cytoplasm or nucleus that specifically bind steroid hormones and trigger changes influencing the behaviour of cells. The steroid receptor-steroid hormone complex regulates the transcription of specific genes. (12 Dec 1998) |
| gonadal steroid-binding globulin | A protein that transports 65% of the testosterone in plasma. Synonym: sex steroid-binding globulin. (05 Mar 2000) |
| saturated steroid 6 alpha-hydroxylase | <enzyme> Acts on 5 alpha-androstane-3 beta,17 beta-diol and 5 alpha-pregnan-3 beta-ol-20-one; does not require cytochrome p-450 Registry number: EC 1.14.99.- Synonym: sat steroid 6alpha-hydroxylase (26 Jun 1999) |
| sex steroid-binding globulin | A protein that transports 65% of the testosterone in plasma. Synonym: sex steroid-binding globulin. (05 Mar 2000) |
| steroid | A group name for lipids that contain a hydrogenated cyclopentanoperhydrophenanthrene ring system. Some of the substances included in this group are progesterone, adrenocortical hormones, the gonadal hormones, cardiac aglycones, bile acids, sterols (such as cholesterol), toad poisons, saponins and some of the carcinogenic hydrocarbons. (18 Nov 1997) |
| steroid 11-alpha-hydroxylase | <enzyme> Converts 11-deoxycortisol to 11-alpha cortisol (the 11-alpha isomer of hydrocortisone) Registry number: EC 1.14.99.- (26 Jun 1999) |
| steroid 11 beta-monooxygenase | <enzyme> A steroid hydroxylase system found in adrenal tissues. It catalyses the 11-hydroxylation of steroids in the presence of molecular oxygen and consists of an NADPH-specific flavoprotein, a non-haem iron protein, and cytochrome p-450. Its deficiency is a cause of congenital adrenal hyperplasia (adrenal hyperplasia, congenital). Chemical name: Steroid, reduced-adrenal-ferredoxin:oxygen oxidoreductase (11 beta-hydroxylating) Registry number: EC 1.14.15.4 (12 Dec 1998) |