Tryptophanase

This enzyme belongs to the family of lyases, specifically in the "catch-all" class of carbon-carbon lyases. The systematic name of this enzyme class is L-tryptophan indole-lyase (deaminating; pyruvate-forming). Other names in common use include L-tryptophanase, and L-tryptophan indole-lyase (deaminating). This enzyme participates in tryptophan metabolism and nitrogen metabolism. It has 2 cofactors: pyridoxal phosphate, and potassium.^[1]^[2]^[3]

Structural studies

As of late 2007, 3 structures have been solved for this class of enzymes, with PDB accession codes 1AX4,^[4] 2C44,^[5] and 2OQX.^[6]

References

^ BURNS RO, DEMOSS RD (1962). "Properties of tryptophanase from Escherichia coli". Biochim. Biophys. Acta. 65 (2): 233–44. doi:10.1016/0006-3002(62)91042-9. PMID 14017164.
^ Cowell JL, Maser K, DeMoss, RD (1973). "Tryptophanase from Aeromonas liquifaciens. Purification, molecular weight and some chemical, catalytic and immunological properties". Biochimica et Biophysica Acta. 315: 449–463. doi:10.1016/0005-2744(73)90276-3.
^ NEWTON WA, MORINO Y, SNELL EE (1965). "Properties of Crystalline Tryptophanase". J. Biol. Chem. 240 (3): 1211–8. doi:10.1016/S0021-9258(18)97562-9. PMID 14284727.
^ 1AX4 Retrieved from Protein Data Bank (PDB)
^ 2C44 Retrieved from Protein Data Bank (PDB)
^ 2OQX Retrieved from Protein Data Bank (PDB)

External links

Media related to Tryptophanase at Wikimedia Commons

v t e Carbon–carbon lyases (EC 4.1)
4.1.1: Carboxy-lyases	Acetoacetate decarboxylase Adenosylmethionine decarboxylase Arginine decarboxylase Aromatic L-amino acid decarboxylase Glutamate decarboxylase Histidine decarboxylase Lysine decarboxylase Malonyl-CoA decarboxylase Ornithine decarboxylase Oxaloacetate decarboxylase Phosphoenolpyruvate carboxykinase Phosphoenolpyruvate carboxylase Phosphoribosylaminoimidazole carboxylase Pyrophosphomevalonate decarboxylase Pyruvate decarboxylase RuBisCO Uridine monophosphate synthetase/Orotidine 5'-phosphate decarboxylase Uroporphyrinogen III decarboxylase
4.1.2: Aldehyde-lyases	Fructose-bisphosphate aldolase Aldolase A Aldolase B Aldolase C 2-hydroxyphytanoyl-CoA lyase Threonine aldolase
4.1.3: Oxo-acid-lyases	Isocitrate lyase 3-hydroxy-3-methylglutaryl-CoA lyase
4.1.99: Other	Tryptophanase Photolyase CPD lyase Spore photoproduct lyase

v t e Enzymes
Activity	Active site Binding site Catalytic triad Oxyanion hole Enzyme promiscuity Diffusion-limited enzyme Cofactor Enzyme catalysis
Regulation	Allosteric regulation Cooperativity Enzyme inhibitor Enzyme activator
Classification	EC number Enzyme superfamily Enzyme family List of enzymes
Kinetics	Enzyme kinetics Eadie–Hofstee diagram Hanes–Woolf plot Lineweaver–Burk plot Michaelis–Menten kinetics
Types	EC1 Oxidoreductases (list) EC2 Transferases (list) EC3 Hydrolases (list) EC4 Lyases (list) EC5 Isomerases (list) EC6 Ligases (list) EC7 Translocases (list)

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