| SUBSTRATE | PRODUCT | REACTION DIAGRAM | ORGANISM | UNIPROT ACCESSION NO. | COMMENTARY/ Substrate | LITERATURE/ Substrate | COMMENTARY/ Product | LITERATURE/ Product | Reversibility r=reversible ir=irreversible ?=not specified |
| (2E,6E)-farnesyl diphosphate + 6 isopentenyl diphosphate | 6 diphosphate + all-trans-nonaprenyl diphosphate |
 | Trypanosoma cruzi | Q964Q8 | - | 674727 | - | - | ? |
| (2E,6E)-farnesyl diphosphate + 6 isopentenyl diphosphate | 6 diphosphate + all-trans-nonaprenyl diphosphate |
 | Arabidopsis thaliana | Q76FS5 | At-SPS2 prefers geranylgeranyl diphosphate to farnesyl diphosphate as the allylic substrate | 658312 | the main product is nonaprenyl diphosphate, considerable amounts of intermediates, such as geranylgeranyl diphosphate are formed | - | ? |
| (2E,6E)-farnesyl diphosphate + 6 isopentenyl diphosphate | 6 diphosphate + all-trans-nonaprenyl diphosphate |
 | Arabidopsis thaliana | Q8S948 | geranylgeranyl diphosphate is preferred over farnesyl diphosphate as allylic substrate | 637968 | the main product is nonaprenyl diphosphate, considerable amounts of geranylgeranyl diphosphate are formed | - | ? |
| (2E,6E)-farnesyl diphosphate + 6 isopentenyl diphosphate | 6 diphosphate + nonaprenyl diphosphate |
 | Hevea brasiliensis | - | 17% of the activity with geranylgeranyl diphosphate | 676675 | - | - | ? |
| dimethylallyl diphosphate + 8 isopentenyl diphosphate | 8 diphosphate + all-trans-nonaprenyl diphosphate |
 | Trypanosoma cruzi | Q964Q8 | low activity | 674727 | - | - | ? |
| geranyl diphosphate + 7 isopentenyl diphosphate | 7 diphosphate + all-trans-nonaprenyl diphosphate |
 | Trypanosoma cruzi | Q964Q8 | - | 674727 | - | - | ? |
| geranyl diphosphate + 7 isopentenyl diphosphate | 7 diphosphate + all-trans-nonaprenyl diphosphate |
 | Hevea brasiliensis | - | 39% of the activity with geranylgeranyl diphosphate | 676675 | - | - | ? |
| geranylgeranyl diphosphate + 5 isopentenyl diphosphate | 5 diphosphate + all-trans-nonaprenyl diphosphate |
 | Hevea brasiliensis | - | geranylgeranyl diphosphate is the preferred allylic substrate | 676675 | - | - | ? |
| geranylgeranyl diphosphate + 5 isopentenyl diphosphate | 5 diphosphate + all-trans-nonaprenyl diphosphate |
 | Trypanosoma cruzi | Q964Q8 | geranylgeranyl diphosphate is the preferred allylic substrate | 674727 | - | - | ? |
| geranylgeranyl diphosphate + 5 isopentenyl diphosphate | 5 diphosphate + all-trans-nonaprenyl diphosphate |
 | Arabidopsis thaliana | - | At-SPS1 contributes to the biosynthesis of the plastoquinone side-chain in Arabidopsis thaliana | 660147 | - | - | ? |
| geranylgeranyl diphosphate + 5 isopentenyl diphosphate | 5 diphosphate + all-trans-nonaprenyl diphosphate |
 | Arabidopsis thaliana | Q76FS5 | At-SPS1 contributes to the biosynthesis of the ubiquinone side-chain in Arabidopsis thaliana | 658312 | - | - | ? |
| geranylgeranyl diphosphate + 5 isopentenyl diphosphate | 5 diphosphate + all-trans-nonaprenyl diphosphate |
 | Arabidopsis thaliana | - | At-SPS1 contributes to the biosynthesis of the ubiquinone side-chain in Arabidopsis thaliana | 660147 | - | - | ? |
| geranylgeranyl diphosphate + 5 isopentenyl diphosphate | 5 diphosphate + all-trans-nonaprenyl diphosphate |
 | Arabidopsis thaliana | Q76FS5 | At-SPS2 supplies the precursor of the plastoquinone side-chain in Arabidopsis thaliana | 658312 | - | - | ? |
| geranylgeranyl diphosphate + 5 isopentenyl diphosphate | 5 diphosphate + all-trans-nonaprenyl diphosphate |
 | Trypanosoma cruzi | Q964Q8 | the enzyme is involved in synthesis of ubiquinone-9 | 674727 | - | - | ? |
| geranylgeranyl diphosphate + 5 isopentenyl diphosphate | 5 diphosphate + all-trans-nonaprenyl diphosphate |
 | Arabidopsis thaliana | Q76FS5 | At-SPS2 prefers geranylgeranyl diphosphate to farnesyl diphosphate as the allylic substrate | 658312 | a large amount of nonaprenyl diphosphate is formed | - | ? |
| geranylgeranyl diphosphate + 5 isopentenyl diphosphate | 5 diphosphate + all-trans-nonaprenyl diphosphate |
 | Arabidopsis thaliana | Q8S948 | geranylgeranyl diphosphate is preferred over farnesyl diphosphate as allylic substrate | 637968 | nonaprenyl diphosphate is almost exclusively formed | - | ? |
| additional information | ? | - | Arabidopsis thaliana | Q76FS5 | no activity with dimethylallyl diphosphate and geranyl diphosphate, recombinant His6-tagged At-SPS2 fusion protein and truncated from of At-SPS2 (At-SPS2DELTA, in which the 30 N-terminal residues of the putative signal-peptide are removed and, instead the His6 tag is attached to the N-terminus) | 658312 | - | - | - |
| additional information | ? | - | Arabidopsis thaliana | Q8S948 | no activity with farnesyl diphosphate and dimethylallyl diphosphate | 637968 | - | - | - |