Adenosine diphosphate (ADP), also known as adenosine pyrophosphate (APP), is an important organic compound in metabolism and is essential to the flow of energy in living cells. ADP consists of three important structural components: a sugar backbone attached to adenine and two phosphate groups bonded to the 5 carbon atom of ribose. The diphosphate group of ADP is attached to the 5’ carbon of the sugar backbone, while the adenine attaches to the 1’ carbon.
In chemistry, pyrophosphates are phosphorus oxyanions that contain two phosphorus atoms in a P–O–P linkage. A number of pyrophosphate salts exist, such as disodium pyrophosphate (Na2H2P2O7) and tetrasodium pyrophosphate (Na4P2O7), among others. Often pyrophosphates are called diphosphates. The parent pyrophosphates are derived from partial or complete neutralization of pyrophosphoric acid. The pyrophosphate bond is also sometimes referred to as a phosphoanhydride bond, a naming convention which emphasizes the loss of water that occurs when two phosphates form a new P–O–P bond, and which mirrors the nomenclature for anhydrides of carboxylic acids. Pyrophosphates are found in ATP and other nucleotide triphosphates, which are important in biochemistry. The term pyrophosphate is also the name of esters formed by the condensation of a phosphorylated biological compound with inorganic phosphate, as for dimethylallyl pyrophosphate. This bond is also referred to as a high-energy phosphate bond.
Adenylate kinase is a phosphotransferase enzyme that catalyzes the interconversion of the various adenosine phosphates. By constantly monitoring phosphate nucleotide levels inside the cell, ADK plays an important role in cellular energy homeostasis.
Nucleic acid metabolism is a collective term that refers to the variety of chemical reactions by which nucleic acids are either synthesized or degraded. Nucleic acids are polymers made up of a variety of monomers called nucleotides. Nucleotide synthesis is an anabolic mechanism generally involving the chemical reaction of phosphate, pentose sugar, and a nitrogenous base. Degradation of nucleic acids is a catabolic reaction and the resulting parts of the nucleotides or nucleobases can be salvaged to recreate new nucleotides. Both synthesis and degradation reactions require multiple enzymes to facilitate the event. Defects or deficiencies in these enzymes can lead to a variety of diseases.
In enzymology, a RNA-3′-phosphate cyclase is an enzyme that catalyzes the chemical reaction
In enzymology, an AMP nucleosidase (EC 3.2.2.4) is an enzyme that catalyzes the chemical reaction
In enzymology, an adenosine-phosphate deaminase (EC 3.5.4.17) is an enzyme that catalyzes the chemical reaction
In enzymology, an aspulvinone dimethylallyltransferase is an enzyme that catalyzes the chemical reaction
In enzymology, a chrysanthemyl diphosphate synthase is an enzyme involved in the biosynthesis of terpenoids. This enzyme is also known as CPPase. It catalyzes the chemical reaction shown below :
In enzymology, a lavandulyl diphosphate synthase is an enzyme that catalyzes the chemical reaction
In enzymology, a naringenin 8-dimethylallyltransferase is an enzyme that catalyzes the chemical reaction
In enzymology, a tryptophan dimethylallyltransferase is an enzyme that catalyzes the chemical reaction
In enzymology, an ADP—thymidine kinase is an enzyme that catalyzes the chemical reaction
In enzymology, an AMP—thymidine kinase is an enzyme that catalyzes the chemical reaction
In enzymology, a nucleoside-phosphate kinase is an enzyme that catalyzes the chemical reaction
In enzymology, a nucleoside-triphosphate-adenylate kinase is an enzyme that catalyzes the chemical reaction
Trihydroxypterocarpan dimethylallyltransferase is an enzyme with systematic name dimethylallyl-diphosphate:(6aS,11aS)-3,6a,9-trihydroxypterocarpan dimethylallyltransferase. This enzyme catalyses the following chemical reaction
Leachianone-G 2''-dimethylallyltransferase is an enzyme with systematic name dimethylallyl-diphosphate:leachianone-G 2''-dimethylallyltransferase. This enzyme catalyses the following chemical reaction:
TRNA dimethylallyltransferase is an enzyme with systematic name dimethylallyl-diphosphate: tRNA dimethylallyltransferase. This enzyme catalyses the following chemical reaction
Fumigaclavine A dimethylallyltransferase is an enzyme with systematic name dimethylallyl-diphosphate:fumigaclavine A dimethylallyltransferase. This enzyme catalyses the following chemical reaction
