Information on EC - ditrans,polycis-polyprenyl diphosphate synthase [(2E,6E)-farnesyl diphosphate specific]

for references in articles please use BRENDA:EC2.5.1.87
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IUBMB Comments
The enzyme is involved in biosynthesis of dolichol (a long-chain polyprenol) with a saturated alpha-isoprene unit, which serves as a glycosyl carrier in protein glycosylation . The yeast Saccharomyces cerevisiae has two different enzymes that catalyse this reaction. Rer2p synthesizes a well-defined family of polyprenols of 13--18 isoprene residues with dominating C(80) (16 isoprene residues) extending to C(120), while Srt1p synthesizes mainly polyprenol with 22 isoprene subunits. Largest Srt1p products reach C(290) . The enzyme from Arabidopsis thaliana catalyses the formation of polyprenyl diphosphates with predominant carbon number C(120) .
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The expected taxonomic range for this enzyme is: Eukaryota, Bacteria, Archaea
AcpT, anther-66, cis-prenyltransferase, cis-PTase, CPT1, Dedol-PP synthase, DedolPP synthase, dehydrodolichyl diphosphate synthase, dehydrodolichyl diphosphate synthase 1, DHDDS, more
(2E,6E)-farnesyl diphosphate + n isopentenyl diphosphate = n diphosphate + ditrans,polycis-polyprenyl diphosphate (n: 10-55)
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