Protein
Geranylfarnesyl diphosphate synthase
Function
Probably involved in biosynthesis of the precursor for C25 (sesterterpanyl chain) moiety of C25-C25 diether (2,3-di-O-sesterterpanyl-sn-glycero) membrane lipid. Catalyzes the condensation of isopentenyl pyrophosphate with the allylic pyrophosphates to yield all-trans geranylfarnesyl diphosphate (GFPP). Geranylgeranyl diphosphate (GGPP) is the preferred substrate, however methylallyl diphosphate (DMAPP), farnesyl diphosphate (FPP) and geranyl diphosphate (GPP) can also be used as allylic substrate.
Similarity
Belongs to the FPP/GGPP synthase family.
Sequence
MLIDHYIMDFMSITPDRLSGASLHLIKAGGKRLRPLITLLTARMLGGLEAEARAIPLAASIETAHTFSLIHDDIMDRDEVRRGVPTTHVVYGDDWAILAGDTLHAAAFKMIADSREWGMSHEQAYRAFKVLSEAAIQISRGQAYDMLFEETWDVDVADYLNMVRLKTGALIEAAARIGAVAAGAGSEIEKMMGEVGMNAGIAFQIRDDILGVIGDPKVTGKPVYNDLRRGKKTLLVIYAVKKAGRREIVDLIGPKASEDDLKRAASIIVDSGALDYAESRARFYVERARDILSRVPAVDAESKELLNLLLDYIVERVK