Table 2.
Activity of newly identified specifier proteins
| |
Incubation with myrosinase and allylglucosinolate |
Incubation with myrosinase and benzylglucosinolate |
|||
|---|---|---|---|---|---|
| Thiocyanate | Epithionitrile | Simple nitrile | Thiocyanate | Simple nitrile | |
| ApTFP1 |
+ |
+ |
- |
- |
+ |
| ChESP1 |
- |
+ |
- |
- |
+ |
| CiESP1 |
- |
+ |
- |
- |
+ |
| DaESP1 |
- |
+ |
- |
- |
+ |
| DlESP1 |
- |
+ |
- |
- |
+ |
| ItESP1 |
- |
+ |
- |
- |
+ |
| SpESP1 |
- |
+ |
- |
- |
+ |
| ChNSP1 |
- |
- |
+ |
- |
+ |
| ItNSP1 |
- |
- |
+ |
- |
+ |
| SpNSP1 | - | - | + | - | + |
Activity was tested using crude extracts of bacteria expressing specifier protein cDNAs, 1 mM allyl- or 2 mM benzylglucosinolate and 0.005 units myrosinase in 50 mM MES buffer, pH 6.0. The presence of non-isothiocyanate products (organic thiocyante, epithionitrile, simple nitrile) in dichloromethane extracts of the assay mixtures after 30 min incubation is indicated by +, the absence by - (in comparison to assays with extracts of bacteria harbouring the expression vector without cDNA insert, for chromatograms see Additional file 5: Figure S3).