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Literature summary extracted from

  • Woehl, E.; Dunn, M.F.
    Mechanisms of monovalent cation action in enzyme catalysis: the first stage of the tryptophan synthase beta-reaction (1999), Biochemistry, 38, 7118-7130.
    View publication on PubMed

KM Value [mM]

EC Number KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
4.2.1.20 additional information
-
additional information kinetics Salmonella enterica subsp. enterica serovar Typhimurium

Organism

EC Number Organism UniProt Comment Textmining
4.2.1.20 Salmonella enterica subsp. enterica serovar Typhimurium
-
-
-

Reaction

EC Number Reaction Comment Organism Reaction ID
4.2.1.20 L-serine + 1-C-(indol-3-yl)glycerol 3-phosphate = L-tryptophan + D-glyceraldehyde 3-phosphate + H2O also catalyses the conversion of serine and indole into tryptophan and water, and of indoleglycerol phosphate into indole and glyceraldehyde phosphate (the latter reaction was listed formerly as EC 4.2.1.8), reaction mechanism, pyridoxal 5'-phosphate in beta-reaction, formation of an alpha-aminoacrylate Schiff base intermediate Salmonella enterica subsp. enterica serovar Typhimurium

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
4.2.1.20 1-(indol-3-yl)glycerol 3-phosphate alpha-subunit of the bienzyme complex, alpha-reaction Salmonella enterica subsp. enterica serovar Typhimurium D-glyceraldehyde 3-phosphate + indole
-
?
4.2.1.20 L-serine + indole beta-subunit of the bienzyme complex, beta-reaction Salmonella enterica subsp. enterica serovar Typhimurium L-tryptophan + H2O
-
?

Subunits

EC Number Subunits Comment Organism
4.2.1.20 tetramer alpha2beta2 complex, structure model Salmonella enterica subsp. enterica serovar Typhimurium

Temperature Optimum [°C]

EC Number Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
4.2.1.20 25
-
assay at Salmonella enterica subsp. enterica serovar Typhimurium

pH Optimum

EC Number pH Optimum Minimum pH Optimum Maximum Comment Organism
4.2.1.20 7.8
-
assay at Salmonella enterica subsp. enterica serovar Typhimurium

Cofactor

EC Number Cofactor Comment Organism Structure
4.2.1.20 pyridoxal 5'-phosphate dependent on Salmonella enterica subsp. enterica serovar Typhimurium

Ki Value [mM]

EC Number Ki Value [mM] Ki Value maximum [mM] Inhibitor Comment Organism Structure
4.2.1.20 additional information
-
additional information inhibition kinetics Salmonella enterica subsp. enterica serovar Typhimurium