Tyrosine decarboxylase

{{short description|Enzyme}}

{{infobox enzyme

| Name = tyrosine decarboxylase

| EC_number = 4.1.1.25

| CAS_number = 9002-09-9

| GO_code = 0004837

| image =

| width =

| caption =

}}

The enzyme tyrosine decarboxylase ({{EnzExplorer|4.1.1.25}}) catalyzes the chemical reaction

:L-tyrosine $\backslash rightleftharpoons$ tyramine + CO₂

Hence, this enzyme has one substrate, L-tyrosine, and two products, tyramine and carbon dioxide.

This enzyme belongs to the family of lyases, specifically the carboxy-lyases, which cleave carbon-carbon bonds. The systematic name of this enzyme class is L-tyrosine carboxy-lyase (tyramine-forming). Other names in common use include L-tyrosine decarboxylase, L-(−)-tyrosine apodecarboxylase, and L-tyrosine carboxy-lyase. This enzyme participates in tyrosine metabolism and alkaloid biosynthesis. It employs one cofactor, pyridoxal phosphate.