homogentisate geranylgeranyltransferase EC#: 2.5.1.116; ChemWhat Code: 1378059

Product Name homogentisate geranylgeranyltransferase
Example Structure Example Structure of homogentisate geranylgeranyltransferase EC#: 2.5.1.116
Synonyms HGGT, homogentisic acid geranylgeranyl transferase, Hppt, slr1736
EC Number 2.5.1.116
CAS Registry Number
Comments Requires Mg2+ for activity. Involved in the biosynthesis of the vitamin E, tocotrienols. While the enzyme from the bacterium Synechocystis PCC 6803 has higher activity with phytyl diphosphate (EC 2.5.1.115, homogentisate phytyltransferase), the enzymes from barley, rice and wheat have only a low activity with that substrate [2].
Cofactor Mg2+
History
Reactions Geranylgeranyl diphosphate + homogentisate = diphosphate + 6-geranylgeranyl-2-methylbenzene-1,4-diol + CO(2).

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