EC Number |
Substrates |
Organism |
Products |
Reversibility |
---|
2.5.1.81 | (2E,6E)-farnesyl diphosphate + 2 isopentenyl diphosphate |
Aeropyrum pernix does not possess geranylgeranyl diphosphate synthase and has only C25-C25 ether lipids, but no C20-containing ether lipids. Aeropyrum pernix farnesylgeranyl diphosphate synthase is important in the biosynthesis of the hydrocarbon moiety of membrane lipids |
Aeropyrum pernix |
(2E,6E,10E,14E)-geranylfarnesyl diphosphate + 2 diphosphate |
- |
? |
2.5.1.81 | (2E,6E)-farnesyl diphosphate + 2 isopentenyl diphosphate |
farnesyl diphosphate is the allylic substrate with the highest activity |
Aeropyrum pernix |
(2E,6E,10E,14E)-geranylfarnesyl diphosphate + 2 diphosphate |
- |
? |
2.5.1.81 | (2E,6E)-farnesyl diphosphate + 2 isopentenyl diphosphate |
farnesyl diphosphate shows 93% of the activity with geranylgeranyl diphosphate. Stereochemistry of farnesylgeranyl diphosphate synthesized by FGPP synthase is unclear, but may be an all-E isomer because the same isomer is produced when dimethylallyl diphosphate, geranyl diphosphate, and (all-E)-farnesyl diphosphate, as well as (all-E)-geranylgeranyl diphosphate, are used as substrates. The stereochemistry of the C25 moiety of C20,C25-diether lipids is identical with that of the C20 moiety |
Natronomonas pharaonis |
(2E,6E,10E,14E)-geranylfarnesyl diphosphate + 2 diphosphate |
- |
? |
2.5.1.81 | dimethylallyl diphosphate + 4 isopentenyl diphosphate |
dimethylallyl diphosphate shows 28% of the activity with farnesyl diphosphate |
Aeropyrum pernix |
(2E,6E,10E,14E)-geranylfarnesyl diphosphate + 4 diphosphate |
large amounts of intermediates are formed: geranyl diphosphate, farnesyl diphosphate, geranylgeranyl diphosphate |
? |
2.5.1.81 | dimethylallyl diphosphate + 4 isopentenyl diphosphate |
dimethylallyl diphosphate shows 51% of the activity with farnesyl diphosphate. Stereochemistry of farnesylgeranyl diphosphate synthesized by FGPP synthase is unclear, but may be an all-E isomer because the same isomer is produced when dimethylallyl diphosphate, geranyl diphosphate, and (all-E)-farnesyl diphosphate, as well as (all-E)-geranylgeranyl diphosphate, are used as substrates. The stereochemistry of the C25 moiety of C20,C25-diether lipids is identical with that of the C20 moiety |
Natronomonas pharaonis |
(2E,6E,10E,14E)-geranylfarnesyl diphosphate + 4 diphosphate |
large amounts of intermediates are formed: geranyl diphosphate, farnesyl diphosphate, geranylgeranyl diphosphate |
? |
2.5.1.81 | farnesyl diphosphate + 2 isopentenyl diphosphate |
biosynthesis of the polyprenyl side-chain of methanophenazine, an electron carrier utilized for methanogenesis |
Methanosarcina mazei |
(2E,6E,10E,14E)-geranylfarnesyl diphosphate + 2 diphosphate |
- |
? |
2.5.1.81 | farnesyl diphosphate + 2 isopentenyl diphosphate |
the enzyme prefers geranylgeranyl diphosphate and farnesyl diphosphate as allylic substrate |
Methanosarcina mazei |
(2E,6E,10E,14E)-geranylfarnesyl diphosphate + 2 diphosphate |
(2E,6E,10E,14E)-geranylfarnesyl diphosphate is the main product, a considerable amount of geranylgeranyl diphosphate as an intermediate is also observed |
? |
2.5.1.81 | geranyl diphosphate + 3 isopentenyl diphosphate |
slight activity |
Methanosarcina mazei |
(2E,6E,10E,14E)-geranylfarnesyl diphosphate + 3 diphosphate |
- |
? |
2.5.1.81 | geranyl diphosphate + 3 isopentenyl diphosphate |
geranyl diphosphate shows 72% of the activity with farnesyl diphosphate |
Aeropyrum pernix |
(2E,6E,10E,14E)-geranylfarnesyl diphosphate + 3 diphosphate |
- |
? |
2.5.1.81 | geranyl diphosphate + 3 isopentenyl diphosphate |
geranyl diphosphate shows 81% of the activity with farnesyl diphosphate. Stereochemistry of farnesylgeranyl diphosphate synthesized by FGPP synthase is unclear, but may be an all-E isomer because the same isomer is produced when dimethylallyl diphosphate, geranyl diphosphate, and (all-E)-farnesyl diphosphate, as well as (all-E)-geranylgeranyl diphosphate, are used as substrates. The stereochemistry of the C25 moiety of C20,C25-diether lipids is identical with that of the C20 moiety |
Natronomonas pharaonis |
(2E,6E,10E,14E)-geranylfarnesyl diphosphate + 3 diphosphate |
- |
? |