| cystathionine | <chemical> Chemical name: L-Homocysteine, S-(2-amino-2-carboxyethyl)-, (R)- (12 Dec 1998) |
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| cystathionine beta-lyase | <enzyme> An enzyme catalyzing the hydrolysis of l-cystathionine to pyruvate, l-homocysteine, and NH3. See: cystathionine gamma-lyase. Synonym: beta-cystathionase, cystine lyase. (05 Mar 2000) |
| cystathionine beta-synthase | <enzyme> A multifunctional pyridoxal phosphate enzyme. In the second stage of cysteine biosynthesis it catalyses the reaction of homocysteine with serine to form cystathionine with the elimination of water. Chemical name: L-Serine hydro-lyase (adding homocysteine) Registry number: EC 4.2.1.22 (12 Dec 1998) |
| cystathionine gamma-lyase | <enzyme> A multifunctional pyridoxal phosphate enzyme. In the final step in the biosynthesis of cysteine it catalyses the cleavage of cystathionine to yield cysteine, ammonia, and 2-ketobutyrate. Chemical name: L-Cystathionine cysteine-lyase (deaminating) Registry number: EC 4.4.1.1 (12 Dec 1998) |
| cystathionine gamma-synthase | o-succinylhomoserine (thiol)-lyase |
| homocysteine cystathionine gamma-synthase | <enzyme> Homocysteine and cystein yield cystathionine and h2s Registry number: EC 4.4.- Synonym: hccg-s (26 Jun 1999) |
| acetoacetyl-CoA synthetase | <enzyme> Catalyses the conversion of acetoacetate and CoA in the presence of ATP to yield AMP, pyrophosphate and acetoacetyl-CoA; the latter is the first intermediate in cholesterogenesis; also acts more slowly on l-3-hydroxybutanoate Registry number: EC 6.2.1.16 Synonym: acetoacetyl-CoA ligase, acetoacetate-CoA ligase, acetoacetyl-coenzyme a synthetase (26 Jun 1999) |
| acetyl-CoA synthetase | A ligase that catalyses the reaction of acetate and CoA and ATP to form AMP, pyrophosphate, and acetyl-CoA. A key step in the activation of acetate. Synonym: acetate thiokinase, acetate-CoA ligase, acetyl-activating enzyme, acetyl-CoA synthetase. (05 Mar 2000) |
| acid cholesterol ester synthetase | <enzyme> Aortal enzyme, does not require exogenous ATP or CoA; reverse reaction of cholesterol esterase Registry number: EC 3.1.1.- Synonym: cholesterol ester synthetase (26 Jun 1999) |
| acyl-CoA synthetase | General term for enzymes that form acyl-CoA, now called ligases, specifically, long-chain fatty acid-CoA ligase. (05 Mar 2000) |
| acyl protein synthetase | <enzyme> Component of the fatty acid reductase complex of luminescent bacteria Registry number: EC 2.3.1.- Synonym: luxe gene product, fatty acyl-protein synthetase (26 Jun 1999) |
| aerobactin synthetase | <enzyme> Condenses 2 molecules of n-epsilon-acetyl-n-epsilon-hydroxylysine with citric acid to form aerobactin Registry number: EC 4.1.3.- (26 Jun 1999) |
| alamethicin synthetase | <enzyme> ATP-dependent, similar to gramicidin s synthesis Registry number: EC 6.3.2.- (26 Jun 1999) |
| alpha-aminoadipyl-cysteinyl-valine synthetase | <enzyme> As of 9/27/95 this has been separated from isopenicillin n synthetase Registry number: EC 6.3.2.- Synonym: acv synthetase, aa-cysteine synthetase, delta-(alpha-aminoadipyl)-cys-val synthetase, delta-(l-alpha-aminoadipyl)-l-cyteinyl-d-valine synthetase, pcbab gene product, acva gene product (26 Jun 1999) |
| androsta-5,16-dien-3 beta-ol synthetase | <enzyme> Nadph- and o(2)-dependent; converts progesterone to 4,16-androstadien-3-one and converts pregnenolone to androstadienol Registry number: EC 1.- Synonym: pregnenolone side-chain cleavage enzyme, 5,16-androstadien-3 beta-ol synthetase, 5,16-androstadien-3-ol synthase, 4,16-androstadien-3-one synthesizing enzyme, 4,16-adien-3-one synthase, 4,16-ado synthase, delta(16)-c(19)-steroid synthetase, andien-beta-synthetase, 16-ene-synthetase (26 Jun 1999) |