3,4 dihydroxyphenylalanine reductive deaminase

3,4-dihydroxyphenylalanine reductive deaminase (EC 4.3.1.22, reductive deaminase, DOPA-reductive deaminase, DOPARDA) is an enzyme with systematic name 3,4-dihydroxy-L-phenylalanine ammonia-lyase (3,4-dihydroxyphenylpropanoate-forming). This enzyme catalyses the following chemical reaction

L-dopa + 2 NADH ⇌ 3,4-dihydroxyphenylpropanoate + 2 NAD⁺ + NH₃

This enzyme participates in the L-phenylalanine-catabolism in the anaerobic phototrophic bacterium Rhodobacter sphaeroides OU5.