Classification Term: 4190
Non-metal pyrophosphates (ontology term: CHEMONTID:0001074)
Inorganic non-metallic compounds containing a pyrophosphate as its largest oxoanion." []
found 2 associated metabolites at sub_class metabolite taxonomy ontology rank level.
Ancestor: Non-metal oxoanionic compounds
Child Taxonomies: There is no child term of current ontology term.
Pyrophosphate
The anion, the salts, and the esters of pyrophosphoric acid are called pyrophosphates. The pyrophosphate anion is abbreviated PPi and is formed by the hydrolysis of ATP into AMP in cells. This hydrolysis is called pyrophosphorolysis. The pyrophosphate anion has the structure P2O74-, and is an acid anhydride of phosphate. It is unstable in aqueous solution and rapidly hydrolyzes into inorganic phosphate. Pyrophosphate is an osteotoxin (arrests bone development) and an arthritogen (promotes arthritis). It is also a metabotoxin (an endogenously produced metabolite that causes adverse health affects at chronically high levels). Chronically high levels of pyrophosphate are associated with hypophosphatasia. Hypophosphatasia (also called deficiency of alkaline phosphatase or phosphoethanolaminuria) is a rare, and sometimes fatal, metabolic bone disease. Hypophosphatasia is associated with a molecular defect in the gene encoding tissue non-specific alkaline phosphatase (TNSALP). TNSALP is an enzyme that is tethered to the outer surface of osteoblasts and chondrocytes. TNSALP hydrolyzes several substances, including inorganic pyrophosphate (PPi) and pyridoxal 5-phosphate (PLP), a major form of vitamin B6. When TSNALP is low, inorganic pyrophosphate (PPi) accumulates outside of cells and inhibits the formation of hydroxyapatite, one of the main components of bone, causing rickets in infants and children and osteomalacia (soft bones) in adults. Vitamin B6 must be dephosphorylated by TNSALP before it can cross the cell membrane. Vitamin B6 deficiency in the brain impairs synthesis of neurotransmitters which can cause seizures. In some cases, a build-up of calcium pyrophosphate dihydrate crystals in the joints can cause pseudogout. COVID info from WikiPathways Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS
diphosphate
Pyrophosphate, also known as diphosphoric acid or ppi, is a member of the class of compounds known as non-metal pyrophosphates. Non-metal pyrophosphates are inorganic non-metallic compoundscontaining a pyrophosphate as its largest oxoanion. Pyrophosphate can be found in a number of food items such as bitter gourd, babassu palm, groundcherry, and black crowberry, which makes pyrophosphate a potential biomarker for the consumption of these food products. Pyrophosphate can be found primarily in blood, saliva, and urine, as well as throughout most human tissues. Pyrophosphate exists in all living organisms, ranging from bacteria to humans. In humans, pyrophosphate is involved in several metabolic pathways, some of which include cardiolipin biosynthesis CL(18:0/16:1(9Z)/16:1(9Z)/16:0), cardiolipin biosynthesis cl(i-13:0/a-17:0/i-18:0/a-17:0), cardiolipin biosynthesis cl(i-12:0/i-16:0/a-15:0/a-25:0), and cardiolipin biosynthesis cl(a-13:0/i-24:0/i-22:0/i-14:0). Pyrophosphate is also involved in several metabolic disorders, some of which include hyperinsulinism-hyperammonemia syndrome, methionine adenosyltransferase deficiency, mevalonic aciduria, and g(m2)-gangliosidosis: variant B, tay-sachs disease. Pyrophosphate is a non-carcinogenic (not listed by IARC) potentially toxic compound. In chemistry, a pyrophosphate is a phosphorus oxyanion. Compounds such as salts and esters are also called pyrophosphates. The group is also called diphosphate or dipolyphosphate, although this should not be confused with phosphates. As a food additive, diphosphates are known as E450. A number of hydrogen pyrophosphates also exist, such as Na2H2P2O7, as well as the normal pyrophosphates .