SAE0003
4-Hydroxyphenylpyruvate Dioxygenase from Streptomyces avermitilis
recombinant, expressed in E. coli
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About This Item
Productos recomendados
recombinant
expressed in E. coli
Quality Level
form
liquid
specific activity
≥5 U/mg
mol wt
~41.8 kDa
shipped in
dry ice
storage temp.
−70°C
General description
4-Hydroxyphenylpyruvate Dioxygenase (4-HPPD) is a key enzyme in the catabolism of tyrosine and phenylalanine. 4-HPPD catalyzes the synthesis of homogenistate (2,5-dihydroxyphenylacetate) from ρ-hydroxyphenylpyruvate and molecular oxygen. 4-HPPD also catalyzes the conversion of α-ketoisocaproate to Β-hydroxyisovalerate. 4-HPPD requires Fe2+ as an essential cofactor.
Rat 4-HPPD has a minimum of 80% homology with human 4-HPPD. Rat 4-HPPD is expressed abundantly in hepatocytes. It is also expressed in kidney, particularly in epithelial cells of the proximal tubules and the distant tubules. 4-HPPD has been identified as a potential biomarker of drug-induced liver injury in rat studies.
Rat 4-HPPD has a minimum of 80% homology with human 4-HPPD. Rat 4-HPPD is expressed abundantly in hepatocytes. It is also expressed in kidney, particularly in epithelial cells of the proximal tubules and the distant tubules. 4-HPPD has been identified as a potential biomarker of drug-induced liver injury in rat studies.
Unit Definition
One unit will oxidize 1 μmole of molecular oxygen per minute at pH 7.0, 25 °C, in the presence of 4-hydroxyphenylpyruvate.
Storage Class
10 - Combustible liquids
wgk_germany
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
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