| SGOT | serum glutamate oxaloacetate transaminase (aspartate aminotransferase) |
|---|---|
| C-ANCA | cytoplasmic anti-neutrophilic cytoplasmic antibody |
| asp | aspartate, aspartic acid; aspiration |
| ATCase | aspartate transcarbomoylase |
| GRINA | glutamate receptor, ionotropic, N-methyl-D-aspartate A |
| cytoplasmic streaming | <cell biology> Bulk flow of the cytoplasm of cells. most conspicuous in large cells such as amoebae and the internodal cells of Chara where the rate of movement may be as high as 100 m/sec. See: cyclosis. (18 Nov 1997) |
|---|---|
| nuclear-cytoplasmic ratio | Ratio of volume of nucleus to volume of cytoplasm, fairly constant for a particular cell type and usually increased in malignant neoplasms. (05 Mar 2000) |
| aspartate | <amino acid> A nonessential amino acid that plays a critical part of the enzyme in the liver that transfers nitrogen-containing amino groups, either in building new proteins and amino acids or in breaking down proteins and amino acids for energy and detoxifying the nitrogen in the form of urea. Depleted levels of aspartic acid may occur temporarily within certain tissues under stress, but, because the body is able to make its own aspartic acid to replace any depletion, deficiency states do not occur. Aspartic acid is abundant in plants, especially in sprouting seeds. In protein, it exists mainly in the form of its amide, asparagine. The popular sweetener Aspartame is a combination of aspartic acid and phenylalanine. Aspartic acid is considered nontoxic. (15 Nov 1997) |
| aspartate 1-decarboxylase | <enzyme> A pyridoxal-phosphate protein that catalyses the alpha-decarboxylation of l-glutamic acid to form gamma-aminobutyric acid and carbon dioxide. The enzyme is found in bacteria and in invertebrate and vertebrate nervous systems. It is the rate-limiting enzyme in determining gaba levels in normal nervous tissues. The brain enzyme also acts on l-cysteate, l-cysteine sulfinate, and l-aspartate. Chemical name: L-Glutamate-1-carboxy-lyase Registry number: EC 4.1.1.15 (12 Dec 1998) |
| aspartate 4-decarboxylase | Aspartate beta-decarboxylase;a carboxy-lyase converting l-aspartate to l-alanine (releasing CO2); it decarboxylates aminomalonate and (in bacteria) removes SO2 from cysteinesulfinate. See: desulfinase. (05 Mar 2000) |
| aspartate-alpha-decarboxylase | <enzyme> Forms beta-alanine Registry number: EC 4.1.1.11 Synonym: aspartate 1-decarboxylase (26 Jun 1999) |
| aspartate-ammonia ligase | <enzyme> An enzyme that catalyses the formation of asparagine from ammonia and aspartic acid, in the presence of ATP. Chemical name: L-Aspartate:ammonia ligase (AMP-forming) Registry number: EC 6.3.1.1 (12 Dec 1998) |
| aspartate ammonia-lyase | <enzyme> An enzyme that catalyses the conversion of aspartic acid to ammonia and fumaric acid in plants and some microorganisms. Chemical name: L-Aspartate ammonia-lyase Registry number: EC 4.3.1.1 (12 Dec 1998) |
| aspartate carbamoyltransferase | <enzyme> An enzyme that catalyses the conversion of carbamoyl phosphate and l-aspartate to yield orthophosphate and n-carbamoyl-l-aspartate. Chemical name: Carbamoyl-phosphate:L-aspartate carbamoyltransferase Registry number: EC 2.1.3.2 (12 Dec 1998) |
| aspartate kinase | <enzyme> An enzyme that catalyses the formation of beta-aspartyl phosphate from aspartic acid and ATP. Threonine serves as an allosteric regulator of this enzyme to control the biosynthetic pathway from aspartic acid to threonine. Chemical name: ATP:L-aspartate 4-phosphotransferase Registry number: EC 2.7.2.4 (12 Dec 1998) |
| aspartate N-acetyltransferase | <enzyme> Nervous system enzyme that mediates synthesis of n-acetylaspartic acid; utilises acetyl-CoA Registry number: EC 2.3.1.17 (26 Jun 1999) |
| aspartate-saemialdehyde dehydrogenase | <enzyme> An enzyme that catalyses the conversion of l-aspartate 4-saemialdehyde, orthophosphate, and NADP+ to yield l-4-aspartyl phosphate and NADPH. Chemical name: L-Aspartate-4-saemialdehyde:NADP+ oxidoreductase (phosphorylating) Registry number: EC 1.2.1.11 (12 Dec 1998) |
| aspartate transaminase | <enzyme> An enzyme of the transferase class that catalyses the reaction of l-aspartate and 2-ketoglutarate to yield oxaloacetate and l-glutamate. The enzyme is a pyridoxal phosphate protein. In the liver the reaction transfers excess metabolic nitrogen into aspartate for disposal in the urea cycle. Chemical name: L-Aspartate:2-oxoglutarate aminotransaminase Registry number: EC 2.6.1.1 (12 Dec 1998) |
| aspartate-trna ligase | <enzyme> An enzyme that activates aspartic acid with its specific transfer RNA. Chemical name: L-Aspartate:tRNA-(Asp) ligase (AMP-forming) Registry number: EC 6.1.1.12 (12 Dec 1998) |
| malate-aspartate shuttle | A mechanism for the transfer of NADH reducing equivalents from the cytosol into the mitochondria using two isozymes of malate dehydrogenase and aspartate transaminase. (05 Mar 2000) |