Phenolsulfotransferase (PST) and PAPS in catecholamine metabolism in human tissues: an overview. 1990

K P Wong, and B Y Khoo, and T M Tan, and K H Sit
Department of Biochemistry, Faculty of Medicine, National University of Singapore.

Sulfate conjugation in vitro was studied in a number of human tissues, such as the platelets, liver as well as in human foetal liver cells in culture. Essentially, the two enzymes involved in PAPS generation and PST were measured either singly or in combination, representing PAPS generation, PST and the overall three-step sulfate conjugation. These activities in the liver and platelets were comparable in magnitude. In the platelets, PAPS generation and PST activities showed a good correlation to the overall sulfate conjugation. With the expression of these activities in human foetal liver cells in culture, it is anticipated that such cells can be employed as model systems for the study of sulfate conjugation in man.

UI MeSH Term Description Entries
D008099 Liver A large lobed glandular organ in the abdomen of vertebrates that is responsible for detoxification, metabolism, synthesis and storage of various substances. Livers
D010724 Phosphoadenosine Phosphosulfate 3'-Phosphoadenosine-5'-phosphosulfate. Key intermediate in the formation by living cells of sulfate esters of phenols, alcohols, steroids, sulfated polysaccharides, and simple esters, such as choline sulfate. It is formed from sulfate ion and ATP in a two-step process. This compound also is an important step in the process of sulfur fixation in plants and microorganisms. Adenosine-3'-phosphate-5'-Phosphosulfate,Adenosine 3' phosphate 5' Phosphosulfate,Phosphosulfate, Phosphoadenosine
D001792 Blood Platelets Non-nucleated disk-shaped cells formed in the megakaryocyte and found in the blood of all mammals. They are mainly involved in blood coagulation. Platelets,Thrombocytes,Blood Platelet,Platelet,Platelet, Blood,Platelets, Blood,Thrombocyte
D002395 Catecholamines A general class of ortho-dihydroxyphenylalkylamines derived from TYROSINE. Catecholamine,Sympathin,Sympathins
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000227 Adenine Nucleotides Adenine Nucleotide,Adenosine Phosphate,Adenosine Phosphates,Nucleotide, Adenine,Nucleotides, Adenine,Phosphate, Adenosine,Phosphates, Adenosine
D015239 Arylsulfotransferase A sulfotransferase that catalyzes the sulfation of a phenol in the presence of 3'-phosphoadenylylsulfate as sulfate donor to yield an aryl sulfate and adenosine 3',5'-bisphosphate. A number of aromatic compounds can act as acceptors; however, organic hydroxylamines are not substrates. Sulfate conjugation by this enzyme is a major pathway for the biotransformation of phenolic and catechol drugs as well as neurotransmitters. EC 2.8.2.1. Phenol Sulfotransferase,Acetaminophen Sulphotransferase,Aryl Sulfotransferase,Catecholamine Sulfotransferase A,Catecholamine Sulfotransferase B,Dopamine Sulfotransferase,Flavonoid Sulfotransferase,Phenol Sulfokinase,Phenol Sulfotransferase M,Phenol Sulfotransferase P,Phenolsulfokinase,Phenolsulfotransferase P,Sulfokinase,Sulfotransferase A, Catecholamine,Sulfotransferase B, Catecholamine,Sulfotransferase M, Phenol,Sulfotransferase P, Phenol,Sulfotransferase, Aryl,Sulfotransferase, Dopamine,Sulfotransferase, Flavonoid,Sulfotransferase, Phenol,Sulphotransferase, Acetaminophen

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