| Adenosine triphosphate (ATP) | Humans | Not Available | 3 | Details |
| Adenosylhomocysteinase | Mycobacterium tuberculosis | May play a key role in the regulation of the intracellular concentration of adenosylhomocysteine. | 1 | Details |
| Adenosylhomocysteinase | Humans | Catalyzes the hydrolysis of S-adenosyl-L-homocysteine to form adenosine and homocysteine. Binds copper ions | 4 | Details |
| Adenosylhomocysteinase | Plasmodium falciparum (isolate 3D7) | Adenosylhomocysteine is a competitive inhibitor of S-adenosyl-L-methionine-dependent methyl transferase reactions; th... more | 1 | Details |
| Adenosylmethionine-8-amino-7-oxononanoate aminotransferase | Escherichia coli (strain K12) | Catalyzes the transfer of the alpha-amino group from S-adenosyl-L-methionine (SAM) to 7-keto-8-aminopelargonic acid (... more | 3 | Details |
| Adenylate cyclase | Anabaena sp. | Not Available | 1 | Details |
| Adenylate cyclase | Humans | Not Available | 4 | Details |
| Adenylate cyclase type 1 | Humans | Catalyzes the formation of the signaling molecule cAMP in response to G protein signaling. Mediates responses to incr... more | 6 | Details |
| Adenylate cyclase type 2 | Humans | Catalyzes the formation of the signaling molecule cAMP in response to G protein signaling. Down-stream signaling casc... more | 3 | Details |
| Adenylate cyclase type 5 | Humans | Catalyzes the formation of the signaling molecule cAMP in response to G protein signaling. Mediates signaling downstr... more | 3 | Details |
| Adenylate dimethylallyltransferase | Agrobacterium tumefaciens (strain C58 / ATCC 33970) | Transfers dimethylallyl groups to AMP as part of the biosynthesis of cytokinin phytohormones. | 2 | Details |
| Adenylate kinase | Escherichia coli (strain K12) | Catalyzes the reversible transfer of the terminal phosphate group between ATP and AMP. Plays an important role in cel... more | 1 | Details |
| Adenylate kinase | Geobacillus stearothermophilus | Catalyzes the reversible transfer of the terminal phosphate group between ATP and AMP. Plays an important role in cel... more | 1 | Details |
| Adenylate kinase | Bacillus globisporus | Catalyzes the reversible transfer of the terminal phosphate group between ATP and AMP. Plays an important role in cel... more | 1 | Details |
| Adenylate kinase | Bacillus subtilis (strain 168) | Catalyzes the reversible transfer of the terminal phosphate group between ATP and AMP. Plays an important role in cel... more | 1 | Details |
| Adenylate kinase 2, mitochondrial | Humans | Catalyzes the reversible transfer of the terminal phosphate group between ATP and AMP. Plays an important role in cel... more | 6 | Details |
| Adenylate kinase 4, mitochondrial | Humans | Broad-specificity mitochondrial nucleoside phosphate kinase involved in cellular nucleotide homeostasis by catalyzing... more | 2 | Details |
| Adenylate kinase 8 | Humans | Nucleoside monophosphate (NMP) kinase that catalyzes the reversible transfer of the terminal phosphate group between ... more | 1 | Details |
| Adenylate kinase isoenzyme 1 | Humans | Catalyzes the reversible transfer of the terminal phosphate group between ATP and AMP. Also displays broad nucleoside... more | 5 | Details |
| Adenylosuccinate lyase | Humans | Catalyzes two non-sequential steps in de novo AMP synthesis: converts (S)-2-(5-amino-1-(5-phospho-D-ribosyl)imidazole... more | 2 | Details |
| Adenylosuccinate synthetase | Escherichia coli (strain K12) | Plays an important role in the de novo pathway of purine nucleotide biosynthesis. Catalyzes the first committed step ... more | 9 | Details |
| Adenylosuccinate synthetase | Shigella flexneri | Plays an important role in the de novo pathway of purine nucleotide biosynthesis. Catalyzes the first committed step ... more | 2 | Details |
| Adenylosuccinate synthetase | Plasmodium falciparum | Plays an important role in the salvage pathway for purine nucleotide biosynthesis. Catalyzes the first committed step... more | 9 | Details |
| Adenylosuccinate synthetase | Yersinia pestis | Plays an important role in the de novo pathway of purine nucleotide biosynthesis. Catalyzes the first committed step ... more | 1 | Details |
| Adenylosuccinate synthetase isozyme 1 | Humans | Component of the purine nucleotide cycle (PNC), which interconverts IMP and AMP to regulate the nucleotide levels in ... more | 7 | Details |