MOLECULE

Phosphoadenosine phosphosulfate

Phosphoadenosine phosphosulfate, also known as 3'-phospho-5'-adenylyl sulfate or PAPS, belongs to the class of organic compounds known as purine ribonucleoside 3',5'-bisphosphates. These are purine ribobucleotides with one phosphate group attached to 3' and 5' hydroxyl groups of the ribose moiety. Phosphoadenosine phosphosulfate is a strong basic compound (based on its pKa). Phosphoadenosine phosphosulfate exists in all living species, ranging from bacteria to humans. Within humans, phosphoadenosine phosphosulfate participates in a number of enzymatic reactions. In particular, galactosylceramide (D18:1/18:0) and phosphoadenosine phosphosulfate can be converted into 3-O-sulfogalactosylceramide (D18:1/18:0) and adenosine 3',5'-diphosphate through its interaction with the enzyme galactosylceramide sulfotransferase. In addition, galabiosylceramide (D18:1/18:0) and phosphoadenosine phosphosulfate can be converted into adenosine 3',5'-diphosphate and galabiosylceramide sulfate (D18:1/18:0) through its interaction with the enzyme galactosylceramide sulfotransferase. An adenosine bisphosphate having monophosphate groups at the 3'- and 5'-positions and a sulfo group attached to the phosphate at position 5'. In humans, phosphoadenosine phosphosulfate is involved in globoid cell leukodystrophy. Phosphoadenosine phosphosulfate is expected to be in Cannabis as all living plants are known to produce and metabolize it.