From: Characterisation of the tryptophan synthase alpha subunit in maize
Reaction | Recombinant Enzyme(s) | Substrate | KM (μM) | kcat (s-1) | kcat/KM(mM-1 s-1) |
---|---|---|---|---|---|
α | ZmTSA | IGP | 458 ± 94 | 0.006 ± 0.002 | 0.013 |
α | ZmTSA+ZmTSB1 | IGP | 52 ± 6 | 0.019 ± 0.004 | 0.37 |
β | ZmTSB1 | Indole | 24 ± 4 | 0.29 ± 0.04 | 12.1 |
β | ZmTSA+ZmTSB1 | Indole | 28 ± 6 | 0.44 ± 0.07 | 15.7 |
αβ | ZmTSA+ZmTSB1 | IGP | 47 ± 9 | 0.45 ± 0.06 | 9.6 |
α | ZmTSAlike | IGP | n. d. | n. d. | n. d. |
α | ZmTSAlike+ZmTSB1 | IGP | n. d. | n. d. | n. d. |
α | BX1 [18] | IGP | 13 | 2.8 | 215 |
α | IGL [17] | IGP | 100 | 2.3 | 23 |
α | EcTSA 1) | IGP | 480 | 0.002 | 0.004 |
α | EcTSA + EcTSB 1) | IGP | 27 | 0.2 | 7.4 |
α | StTSA + StTSB 2) | IGP | 100 | 0.14 | 1.4 |
β | StTSA + StTSB 2) | Indole | 15 | 3.6 | 240 |
αβ | StTSA + StTSB 2) | IGP | 20 | 3 | 150 |