KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.15 | - |
Polysulfide | PDH | Thermotoga neapolitana |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Thermotoga neapolitana | - |
- |
- |
Oxidation Stability | Organism |
---|---|
PDH activity is oxygen labile in crude extracts | Thermotoga neapolitana |
Reaction | Comment | Organism | Reaction ID |
---|---|---|---|
H2 + (sulfide)n = hydrogen sulfide + (sulfide)n-1 | two enzymes: hydrogenase with sulfur reductase activity and an NADPH-utilizing polysulfide dehydrogenase are detected | Thermotoga neapolitana |
Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
---|---|---|---|
additional information | - |
spec. act. for the PDH are 12 to 48fold higher than for sulfhydrogenase | Thermotoga neapolitana |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
disulfide + electron donor | cystine and cystamine, minimal activities, PDH | Thermotoga neapolitana | H2S | - |
? | |
polysulfide + electron donor | highest activity, NADH and NADPH as electron donors for PDH, hydrogen alone can reduce polysulfide via sulfhydrogenase, but the amount of this activity is minimal compared with that of PDH | Thermotoga neapolitana | H2S + oxidized electron donor | - |
? | |
sulfur + electron donor | electron donor: NADH or NAPDH | Thermotoga neapolitana | H2S + oxidized electron donor | - |
? |
Synonyms | Comment | Organism |
---|---|---|
polysulfide dehydrogenase | PDH | Thermotoga neapolitana |
sulfhydrogenase | homology of hydrogenase and sulfur reductase | Thermotoga neapolitana |