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BKMS-react is an integrated and non-redundant biochemical reaction database containing known enzyme-catalyzed and spontaneous reactions. Biochemical reactions collected from BRENDA, KEGG, MetaCyc and SABIO-RK were matched and integrated by aligning substrates and products.

:= BRENDA, := KEGG, := MetaCyc, := SABIO-RK
:= amino acid sequences := show the reaction diagram
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  • EC Number
  • Reaction
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EC Number
Reaction IDs
Stoichiometry Check  
ditrans,polycis-polyprenyl diphosphate synthase [(2E,6E)-farnesyl diphosphate specific]
(2E,6E)-farnesyl diphosphate + 13 isopentenyl diphosphate = 13 diphosphate + di-trans,poly-cis-hexadecaprenyl diphosphate
: The enzyme is involved in biosynthesis of dolichol (a long-chain polyprenol with a saturated α-isoprene unit, which serves as a glycosyl carrier in protein glycosylation [11442630]. The yeast Saccharomyces cerevisiae has two different enzymes that catalyse this reaction. Rer2p synthesises a well-defined family of polyprenols of 13-18 isoprene residues with dominating C80 (16 isoprene residues) extending to C120, while Srt1p synthesizes mainly polyprenol with 22 isoprene subunits. Largest Srt1p products reach C290 [17345630]. The enzyme from Arabidopsis thaliana catalyses the formation of polyprenyl diphosphates with predominant carbon number C120 [10764783].