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Information on EC 2.5.1.87 - ditrans,polycis-polyprenyl diphosphate synthase [(2E,6E)-farnesyl diphosphate specific]

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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, Archaea
Synonyms
dhdds, nogo-b receptor, rer2p, tk-idsb, srt1p, slcpt3, dedol-pp synthase, dedolpp synthase, cis-ptase, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
(2E,6E)-farnesyl diphosphate + n isopentenyl diphosphate = n diphosphate + ditrans,polycis-polyprenyl diphosphate (n: 10-55)
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