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EC Explorer

EC 2.5.1.82 Details
EC number
2.5.1.82
Accepted name
hexaprenyl diphosphate synthase [geranylgeranyl-diphosphate specific]
Reaction
geranylgeranyl diphosphate + 2 (3-methylbut-3-en-1-yl diphosphate) = 2 diphosphate + all-trans-hexaprenyl diphosphate
Other name(s)
HexPS(ambiguous), (all-E) hexaprenyl diphosphate synthase, (all-trans) hexaprenyl diphosphate synthase, hexaprenyl pyrophosphate synthase (ambiguous), HexPPs (ambiguous), hexaprenyl diphosphate synthase (ambiguous), geranylgeranyl-diphosphate:isopentenyl-diphosphate transferase (adding 2 isopentenyl units)
Systematic name
geranylgeranyl-diphosphate:3-methylbut-3-en-1-yl-diphosphate transferase (adding 2 units of 3-methylbut-3-en-1-yl)
Comment
The enzyme prefers geranylgeranyl diphosphate to farnesyl diphosphate as an allylic substrate and does not show activity for geranyl diphosphate and prenyl diphosphate. Requires Mg2+ [1].
History
created 1984 as EC 2.5.1.33, part transferred 2010 to EC 2.5.1.82
EC Tree
2.5.1.12 created 1972, deleted 1976
2.5.1.13 created 1972, deleted 1976
2.5.1.14 created 1972, deleted 1976
2.5.1.37 created 1989, deleted 2004
2.5.1.40 created 1992, deleted 1999