ID   2.5.1.156
DE   geranylfarnesylglycerol-phosphate geranylfarnesyltransferase.
AN   2,3-bis-O-(farnesylgeranyl)-sn-glycerol 1-phosphate synthase.
AN   2,3-di-O-farnesylgeranylglyceryl synthase.
AN   DGFGP synthase.
CA   (2E,6E,10E,14E)-geranylfarnesyl diphosphate + sn-3-
CA   (O-farnesylgeranyl)glycerol 1-phosphate = 2,3-bis-O-(geranylfarnesyl)-
CA   sn-glycerol 1-phosphate + diphosphate.
CC   -!- The enzyme, characterized from the archaeon Aeropyrum pernix, carries
CC       out the second prenyltransfer reaction involved in the formation of
CC       C25,C25 membrane diether-lipids in some archaea.
CC   -!- Requires a divalent metal cation, such as Mg(2+).
CC   -!- The enzyme cannot accept sn-3-(O-geranylgeranyl)glycerol 1-phosphate
CC       as the prenyl donor. cf. EC 2.5.1.42.
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