L-Tyrosine Decarboxylase Apoenzyme from Streptococcus faecalis

4.1.1.25 ( BRENDA | IUBMB )

232-652-9

MFCD00131472

NA.54

L-Tyrosine decarboxylase apoenzyme from Streptococcus faecalis has been used:

• in a study to purify and characterize tyrosine decarboxylase and aromatic-L-amino-acid decarboxylase
• in a study to investigate the stereospecificity of sodium borohydride reduction of tyrosine decarboxylase
• in protein synthesis studies

L-Tyrosine Decarboxylase Apoenzyme is an aromatic L-amino acid decarboxylase. The enzyme activity of tyrosine decarboxylase (TDC) is dependent on the cofactor pyridoxal 5-phosphate (PLP). It catalyzes the decarboxylation of dihydroxyphenylalanine.

Dried cells grown on vitamin B₆-deficient medium.

One unit will liberate 1.0 μmole of CO₂ from L-tyrosine per min at pH 5.5 at 37 ℃.

powder

200

≥0.05 unit/mg solid (with excess pyridoxal 5-phosphate)
<0.005 unit/mg solid (without pyridoxal 5-phosphate)

−20℃

250 units in poly bottle
25, 50 units in glass bottle

11 - Combustible Solids

WGK 3

Eyeshields, Gloves, type N95 (US)