| prostaglandin-F synthase | <enzyme> Catalyses conversion of pgd2 to pgf2alpha; also converts pgh2 to pgf2alpha Registry number: EC 1.1.1.188 Synonym: pgd2 11-keto reductase, pgf synthetase, pgf synthase, prostaglandin d2-NADPH-dependent ketoreductase, prostaglandin f synthetase, pgf2alpha synthase, prostaglandin d2 11-keto reductase (26 Jun 1999) |
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| pseudouridine 746-32 synthase | <enzyme> A dual-specificity pseudouridine synthase; forms both pseudouridine 746 in e. Coli 23s ribosomal RNA and pseudouridine 32 in trna(phe); has 219 aa; mw 24 kD Registry number: EC 5.4.99.- Synonym: 23s RNA pseudouridine 746 synthase, psi746 synthase, trna(phe) pseudouridine 32 synthase, psi32 synthase (26 Jun 1999) |
| psoralen synthase | <enzyme> Nadph-dependent cytochrome p-450 monooxygenase which converts (+) marmesin by initial hydroxylation at c3', followed by release of water, acetone and psoralen Registry number: EC 1.14.13.- Synonym: psoralen 5-monooxygenase (26 Jun 1999) |
| pteroylpolyglutamate synthase | <enzyme> Catalyses formation of amide bond between the gamma-carboxyl group of a folate and the amino group of glutamic acid Registry number: EC 6.3.1.- (26 Jun 1999) |
| holo-ACP synthase | <enzyme> An enzyme catalyzing transfer of the 4'-phosphopantetheinyl residue from CoA to a serine of apo-ACP (acyl carrier protein) to form holo-ACP, releasing adenosine 3',5'-bisphosphate; a required step if fatty acid biosynthesis is to function. (05 Mar 2000) |
| homocitrate synthase | <enzyme> Chemical name: 3-hydroxybutane-1,2,4-tricarboxylate 2-oxoglutarate-lyase (CoA-acetylating) Registry number: EC 4.1.3.21 Synonym: lys1 gene product, nifv gene product (26 Jun 1999) |
| homocysteine cystathionine gamma-synthase | <enzyme> Homocysteine and cystein yield cystathionine and h2s Registry number: EC 4.4.- Synonym: hccg-s (26 Jun 1999) |
| putrescine synthase | <chemical> Plant enzyme which has agmatine iminohydrolase (EC 3.5.3.12), putrescine transcarbamylase (EC 2.1.3.6), ornithine transcarbamylase (EC 2.1.3.3) and carbamate kinase (EC 2.7.2.2) activities Chemical name: synthase, putrescine (26 Jun 1999) |
| sepiapterin synthase | <enzyme> Dihydroneopterin is converted to sepiapterin in the presence of one or more enzymes Registry number: EC 1.1.- (26 Jun 1999) |
| pyrimidodiazepine synthase | <enzyme> Converts pyruvoyl-h4-pterin to pyrimidodiazepine by removal of a methyl group and reduction of a ketone group; requires glutathione Registry number: EC 1.2.4.- Synonym: pda synthase (26 Jun 1999) |
| hydrogenobyrinic acid synthase | <enzyme> Pseudomonas denitrificans enzyme which is proposed to transfer a methyl group from c-11 to c-12 of precorrin-8x Registry number: EC 5.4.99.- Synonym: cobh gene product (26 Jun 1999) |
| hydrogen-transporting ATP synthase | <enzyme> A group of enzymes which are involved in the reversible synthesis of ATP and that transport protons from the cytoplasmic to the matrix side of the mitochondrial membrane. The flow of protons through the f(0) channel results in ATP synthesis by f1. Chemical name: ATP phosphohydrolase (H+-transporting) Registry number: EC 3.6.1.34 (12 Dec 1998) |
| hydroxymethylbilane synthase | <enzyme> An enzyme that catalyses the formation of hydroxymethylbilane from four molecules of porphobilinogen. Chemical name: Porphobilinogen ammonia-lyase (polymerizing) Registry number: EC 4.3.1.8 (12 Dec 1998) |
| hydroxymethylglutaryl-CoA synthase | <enzyme> An enzyme that catalyses the synthesis of hydroxymethylglutaryl-CoA from acetyl-CoA and acetoacetyl-CoA. This is a key enzyme in steroid biosynthesis. Chemical name: (S)-3-Hydroxy-3-methylglutaryl-CoA acetoacetyl-CoA-lyase (CoA-acetylating) Registry number: EC 4.1.3.5 (12 Dec 1998) |
| S-linalool synthase | <enzyme> Converts geranylpyrophosphate via a linalyl cation and addition of h2o to form the monoterpene s-linalool (3,7-dimethylocta-1,6-dien-3-ol) Registry number: EC 4.2.1.- (26 Jun 1999) |