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Merck
CN

SAE0003

4-Hydroxyphenylpyruvate Dioxygenase from Streptomyces avermitilis

recombinant, expressed in E. coli

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About This Item

NACRES:
NA.54
UNSPSC Code:
12352204
Specific activity:
≥5 U/mg
Recombinant:
expressed in E. coli
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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.

Other Notes

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

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

Regulatory Information

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Global Trade Item Number

SKUGTIN
SAE0003-1MG04061826703670