Canadian Medical Guide > Chemicals and Drugs > Enzymes and Coenzymes > Enzymes > Transferases > Alkyl and Aryl Transferases Terms and Definitions




Alkyl and Aryl Transferases

Medical Definition: A somewhat heterogeneous class of enzymes that catalyze the transfer of alkyl or related groups (excluding methyl groups). EC 2.5.
Also Called: Alkyltransferases,Aryltransferases
CAS Number: EC 2.5
Previously Indexed: Transferases (1976-1997)
Alkyl and Aryl Transferases Categories.
Canadian Medical Guide Definition Dihydropteroate Synthase - An enzyme that catalyzes the formation of dihydropteroate from p-aminobenzoic acid and dihydropteridine-hydroxymethyl-pyrophosphate. EC 2.5.1.15.
Canadian Medical Guide Definition Dimethylallyltranstransferase - An enzyme that, in the pathway of cholesterol biosynthesis, catalyzes the condensation of isopentenyl pyrophosphate and dimethylallylpyrophosphate to yield pyrophosphate and geranylpyrophosphate. The enzyme then catalyzes the condensation of the latter compound with another molecule of isopentenyl pyrophosphate to yield pyrophosphate and farnesylpyrophosphate. EC 2.5.1.1.
Canadian Medical Guide Definition Glutathione Transferase - A transferase that catalyzes the addition of aliphatic, aromatic, or heterocyclic radicals as well as epoxides and arene oxides to glutathione. Addition takes place at the sulfur atom. It also catalyzes the reduction of polyol nitrate by glutathione to polyol and nitrite. EC 2.5.1.18.
Canadian Medical Guide Definition Methionine Adenosyltransferase - An enzyme that catalyzes the synthesis of S-adenosylmethionine from methionine and ATP. EC 2.5.1.6.
Canadian Medical Guide Definition Riboflavin Synthase - An enzyme that catalyzes the formation of riboflavin from two molecules of 6,7-dimethyl-8-ribityllumazine, utilizing a four-carbon fragment from one molecule which is transferred to the second molecule. EC 2.5.1.9.
Canadian Medical Guide Definition Spermidine Synthase - An enzyme that catalyzes the transfer of the propylamine moiety from 5'-deoxy-5'-S-(3-methylthiopropylamine)sulfonium adenosine to putrescine in the biosynthesis of spermidine. The enzyme has a molecular weight of approximately 73,000 kD and is composed of two subunits of equal size. EC 2.5.1.16.
Canadian Medical Guide Definition Spermine Synthase - An enzyme that catalyzes the transfer of the propylamine moiety from 5'-deoxy-5'-S-(3-methylthiopropylamine)sulfonium adenosine to spermidine in the biosynthesis of spermine. It has an acidic isoelectric point at pH 5.0. EC 2.5.1.22.

Alkyl and Aryl Transferases Medical Definitions and Terms

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