| GAL | galactose; galactosyl; glucuronic acid lactone |
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| OHHL | N-(3-oxohexanoyl)-L-homoserine lactone |
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| AHL | N-Acyl homoserine lactone |
| BEL | Bromoenol lactone |
| CL | Coriaria Lactone |
| SL | sesquiterpene lactone |
| homoserine lactone | The cyclic ester (i.e., the d-lactone) of homoserine; formed by the reaction of cyanogen bromide on methionyl residues in peptides and proteins. (05 Mar 2000) |
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| aspartokinase homoserine dehydrogenase | An enzyme complex consisting of aspartokinase, and homoserine dehydrogenase, The complex has been isolated from e. Coli and consists of four identical subunits with a molecular weight of 85,000. The enzyme complex is involved in the biosynthesis of amino acids of the aspartate family. (12 Dec 1998) |
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| pantoyl lactone dehydrogenase | <enzyme> An fmn-dependent enzyme that catalyses the formation of ketopantoyl lactone from l-(+)-pantoyl lactone; isolated from nocardia asteroides Registry number: EC 1.1.99.- (26 Jun 1999) |
| homoserine | An amino acid which is used by plants and bacteria to make methionine, threonine, and isoleucine (three of the twenty amino acids used to make proteins). Homoserine is similar to the amino acid serine (another of the twenty amino acids used to make proteins), except it has an extra methylene group. It is also formed when cystathionine is metabolised into the amino acid cysteine (another of the twenty amino acids used to make proteins). (09 Oct 1997) |
| homoserine deaminase | <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) |
| homoserine dehydratase | <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) |
| homoserine dehydrogenase | <enzyme> An enzyme that catalyses the reduction of aspartic beta-saemialdehyde to homoserine, which is the branch point in biosynthesis of methionine, lysine, threonine and leucine from aspartic acid. Chemical name: L-Homoserine:NAD(P)+ oxidoreductase Registry number: EC 1.1.1.3 (12 Dec 1998) |
| triacetic acid lactone lyase | <enzyme> Non-hydrolytic; froms acetyl-CoA from triacetic acid lactone plus ATP plus CoA Registry number: EC 4.2.99.- Synonym: ATP tal (26 Jun 1999) |
| lactone | <chemistry> One of a series of organic compounds, regarded as anhydrides of certain hydroxy acids. In general, they are colourless liquids, having a weak aromatic odour. They are so called because the typical lactone is derived from lactic acid. Source: Websters Dictionary (01 Mar 1998) |
| 6-phospho-d-glucono d-lactone | An intermediate in the pentose phosphate pathway that is synthesised from d-glucose-6-phosphate. (05 Mar 2000) |
| l-gulono-gamma-lactone | The immediate precursor of ascorbic acid in those animals capable of ascorbic acid biosynthesis. Synonym: dihydroascorbic acid, l-gulono-gamma-lactone. L-gulonolactone oxidase, the enzyme catalyzing the conversion of l-gulonolactone and O2 to H2O2 and l-xylo-hexulonolactone, a precursor of ascorbic acid; absent in primates. (05 Mar 2000) |
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