Table 5 Enzyme properties involved in the sulfur oxidation of A. thiooxidans
Abbreviation | Enzyme name | No. of enzyme | Position | Reaction |
|---|---|---|---|---|
SDO | Sulfur dioxygenase | EC 1.13.11.18 | Periplasm | S0 → SO3 2− |
SQR | Sulfide quinone reductase | EC 1.8.5.4 | Inner Membrane | H2S → S0 |
TQO | Thiosulfate:quinone oxidoreductase | EC 1.8.5.2 | Inner Membrane | S2O3 2− → S4O6 2− |
TetH | Tetrathionate hydrolase |  | Periplasm | S4O6 2− → S2O3 2− + SO4 2− + S0 |
Sox | Sulfur oxidizing protein |  | Periplasm | S2O3 2− → SO4 2− + S0 |
HDR | Heterodisulfide reductase |  | Cytoplasm | RSSH → RSH + SO3 2− |
SOR | Sulfur oxygenase reductase | EC 1.13.11.55 | Cytoplasm | S0 → H2S + SO3 2− + S2O3 2− |
TST | Thiosulfate sulfurtransferase | EC 2.8.1.1 | Cytoplasm | S2O3 2− → SO3 2− + S0 |
PAPS reductase | Phosphoadenosine phosphosulfate reductase | EC 1.8.4.8 | Cytoplasm | SO3 2− → PAPS |
APS kinase | Adenylylsulfate kinase | EC 2.7.1.25 | Cytoplasm | PAPS → APS |