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Merck

SAE0003

Sigma-Aldrich

4-Hydroxyphenylpyruvate Dioxygenase from Streptomyces avermitilis

recombinant, expressed in E. coli

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About This Item

分類程式碼代碼:
12352204
NACRES:
NA.54

重組細胞

expressed in E. coli

品質等級

形狀

liquid

比活性

≥5 U/mg

分子量

~41.8 kDa

運輸包裝

dry ice

儲存溫度

−70°C

一般說明

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.

單位定義

One unit will oxidize 1 μmole of molecular oxygen per minute at pH 7.0, 25 °C, in the presence of 4-hydroxyphenylpyruvate.

儲存類別代碼

10 - Combustible liquids

水污染物質分類(WGK)

WGK 1

閃點(°F)

Not applicable

閃點(°C)

Not applicable


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