Cloned (Comment) | Organism |
---|---|
expressed in Escherichia coli | Haemophilus influenzae |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
additional information | Haemophilus influenzae | stopped-flow fluorescence spectroscopy is used to characterize the interaction of serine acetyltransferase with OASS and in the presence of the physiological regulators cysteine and bisulfide. Cysteine synthase assembly occurs via a two-step mechanism involving rapid formation of an encounter complex between the two enzymes, followed by a slow conformational change. The conformational change likely results from the closure of the active site of OASS upon binding of the serine acetyltransferase C-terminal peptide. Bisulfide stabilizes the cysteine synthase complex mainly by decreasing the back rate of the isomerization step. Cysteine, the product of the OASS reaction and a SAT inhibitor, slightly affects the kinetics of cysteine synthase formation leading to destabilization of the complex | ? | - |
? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Haemophilus influenzae | - |
- |
- |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
additional information | stopped-flow fluorescence spectroscopy is used to characterize the interaction of serine acetyltransferase with OASS and in the presence of the physiological regulators cysteine and bisulfide. Cysteine synthase assembly occurs via a two-step mechanism involving rapid formation of an encounter complex between the two enzymes, followed by a slow conformational change. The conformational change likely results from the closure of the active site of OASS upon binding of the serine acetyltransferase C-terminal peptide. Bisulfide stabilizes the cysteine synthase complex mainly by decreasing the back rate of the isomerization step. Cysteine, the product of the OASS reaction and a SAT inhibitor, slightly affects the kinetics of cysteine synthase formation leading to destabilization of the complex | Haemophilus influenzae | ? | - |
? |
Synonyms | Comment | Organism |
---|---|---|
O-acetylserine sulfhydrylase | cysteine synthase is a multiprotein assembly formed by the pyridoxal 5'-phosphate-dependent enzyme O-acetylserine sulfhydrylase and serine acetyltransferase | Haemophilus influenzae |
OASS | - |
Haemophilus influenzae |