ID   2.5.1.115
DE   homogentisate phytyltransferase.
AN   HPT.
CA   H(+) + homogentisate + phytyl diphosphate = 2-methyl-6-phytyl-1,4-
CA   benzene-1,4-diol + CO2 + diphosphate.
CC   -!- Involved in the biosynthesis of the vitamin E tocopherols.
CC   -!- While the enzyme from the cyanobacterium Synechocystis PCC 6803 has
CC       an appreciable activity with geranylgeranyl diphosphate
CC       (EC 2.5.1.116), the enzyme from the plant Arabidopsis thaliana has
CC       only a low activity with that substrate.
CC   -!- Formerly EC 2.5.1.n8.
DR   P73726, HGGT_SYNY3 ;  Q8VWJ1, HPT1_ARATH ;  B7FA90, HPT1_ORYSJ ;
DR   Q0D576, HPT2_ORYSJ ;
//