| ATP | <biochemistry> A nucleotide present in all living cells which serves as an energy source for many metabolic processes and is required for ribonucleic acid synthesis. (06 May 1997) |
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| ATP citrate (pro-3S)-lyase | <enzyme> An enzyme that, in the presence of ATP and CoA, catalyses the cleavage of citrate to yield acetyl CoA, oxaloacetate, ADP, and orthophosphate. This reaction represents an important step in fatty acid biosynthesis. Chemical name: ATP:citrate oxaloacetate-lyase ((pro-S)-CH2COO(-)--acetyl-CoA) (ATP-dephosphorylating) Registry number: EC 4.1.3.8 Synonym: citrate cleavage enzyme. (12 Dec 1998) |
| ATP citrate lyase | ATP citrate (pro-3S)-lyase |
| ATP cobalamin adenoxyltransferase | <enzyme> An enzyme that catalyses the reaction of ATP, water, and cobalamin to form orthophosphate, pyrophosphate, and adenoxylcobalamin. Adenosylcobalamin is required by methylmalonyl-CoA mutase. A deficiency of ATP cobalamin adenosyltransferase will lead to methylmalonic acidemia. (05 Mar 2000) |
| ATP dependent 26S protease | <enzyme> Degrades proteins conjugated to ubiquitin; composed of cf-1,cf-2, and cf-3; cf-2 (also known as 240-kD proteasome inhibitor) is identical to aminolevulinic acid dehydratase Registry number: EC 3.4.99.- Synonym: 26s protease, 26 s proteasome complex, 26s proteasome (26 Jun 1999) |
| ATP phosphoribosyltransferase | <enzyme> An enzyme that catalyses the first step of the pathway for histidine biosynthesis in salmonella typhimurium. ATP reacts reversibly with 5-phosphoribosyl-1-pyrophosphate to yield n-1-(5'-phosphoribosyl)-ATP and pyrophosphate. Chemical name: 1-(5-Phospho-D-ribosyl)-ATP:pyrophosphate phospho-alpha-D- ribosyltransferase Registry number: EC 2.4.2.17 (12 Dec 1998) |
| ATP sulfurylase | <enzyme> An enzyme that catalyses the activation of sulfate ions by ATP to form adenosine-5'-phosphosulfate and pyrophosphate. This reaction constitutes the first enzymatic step in sulfate utilization following the uptake of sulfate. Chemical name: ATP:sulfate adenylyltransferase Registry number: EC 2.7.7.4 (12 Dec 1998) |
| ATP synthase | <enzyme> An enzyme that catalyses the conversion of phosphate and ADP into ATP during oxidativephosphorylation in mitochondriaand bacteria or photophosphorylationin chloroplasts. (09 Oct 1997) |
| ATP-corrinoid adenosyltransferase | <enzyme> Shares significant homology and functional similarity with btur of escherichia coli and cobo of pseudomonas denitrificans; do not confuse with product of coba gene of pseudomonas, which produces uroporphyrin-iii c-methyltransferase; 196 aa residues, mw 22-25 kD; genbank l08890 Registry number: EC 2.5.1.- Synonym: coba protein, coba gene product (26 Jun 1999) |
| ATP-dependent DNA strand transferase | <enzyme> From human cell nuclei; catalyses strand exchange between homologous DNA sequences; magnesium dependent, requires ATP hydrolysis Registry number: EC 2.7.7.- Synonym: ATP-dep-DNA-str trnsfase (26 Jun 1999) |
| ATP-diphosphatase | <enzyme> An enzyme that catalyses breakdown of ATP to AMP, usually extracted from plants, but aortic and placental forms have also been described. (18 Nov 1997) |
| ATP-monophosphatase | <enzyme> A group of enzymes which catalyze the hydrolysis of ATP coupled with another function such as transporting calcium across a membrane. These enzymes may be dependent on calcium, magnesium, anions, h+, or DNA. Chemical name: ATP phosphohydrolase Registry number: EC 3.6.1.3 (12 Dec 1998) |
| ATP-ubiquitin-dependent proteinase | <enzyme> A component of the cytosolic ubiquitin-dependent proteolysis system Registry number: EC 3.4.- Synonym: ucden (26 Jun 1999) |
| ATPase | <enzyme> An enzyme that hydrolyzes ATP into ADP and phosphate. (09 Oct 1997) |
| ATPD | Symbol indicating that a gas volume has been expressed as if it had been dried at the ambient temperature and pressure. (05 Mar 2000) |
| caged ATP | <biochemistry> A derivative of ATP that is not biologically active until a photosensitive bond has been cleaved. (21 Mar 1998) |
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| malate ATP lyase | <chemical> Composed of malyl-CoA synthetase (EC 6.2.1.9) and malyl-CoA lyase (EC 4.3.24) Synonym: malate lyase (26 Jun 1999) |
| phosphoenolpyruvate carboxykinase (ATP) | <enzyme> An enzyme of the lyase class that catalyses the conversion of ATP and oxaloacetate to ADP, phosphoenolpyruvate, and carbon dioxide. The enzyme is found in some bacteria, yeast, and trypanosoma, and is important for the photosynthetic assimilation of carbon dioxide in some plants. Chemical name: ATP:oxaloacetate carboxy-lyase (transphosphorylating) Registry number: EC 4.1.1.49 (12 Dec 1998) |
| seryl-tRNA-ATP phosphotransferase | <enzyme> Produces phosphoseryl trna; plays suppressor role in in vitro globin synthesis Registry number: EC 2.7.1.- Synonym: ser-trna ptase, seryl trna kinase (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) |
| DNA topoisomerase (ATP-hydrolysing) | <enzyme> An ATP-requiring enzyme which, in the presence of magnesium ions, introduces negative supertwists into closed and possibly linear duplex DNA. The enzyme is implicated in DNA replication and transcription. It causes the storage of mechanical strain energy in the superhelical turns of DNA at the expense of ATP hydrolysis. Chemical name: DNA topoisomerase (ATP-hydrolysing) Registry number: EC 5.99.1.3 (12 Dec 1998) |
| oligophosphoglyceroyl-ATP 3'-phosphodiesterase | <enzyme> Located in mitochondrial fraction of rat liver; selectively hydrolyzes the oligo cpd to monomeric units of 3-phosphoglyceroyl-gamma-triphospho-5'-adenosine Registry number: EC 3.1.4.- Synonym: opg-ATP-phosphodiesterase (26 Jun 1999) |