Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10843384 | Protein Expression and Purification | 2010 | 5 Pages |
Abstract
A plasmid (pCW) was modified to code for the complete sequence of house fly (Musca domestica) cytochrome P450 6A1 (CYP6A1) with only the second amino acid changed in the N-terminal portion and this plasmid was used to express the enzyme CYP6A1 in Escherichia coli cells. With the addition of δ-aminolevulinic acid and FeCl3 to the culture, the enzyme was produced at a level about 0.25 μmol Lâ1 (15 mg Lâ1) of culture with approximately 50% of the P450 being associated with the membrane fraction. The CYP6A1 protein was characterized and the content of CYP6A1 in each fraction was determined by the spectroscopic method. A nearly homogenous CYP6A1 was obtained by purification with a combination of DEAE Sepharose fast flow and hydroxyapatite chromatography. Direct electrochemistry of CYP6A1 in a didodecyldimethylammonium bromide (DSAB) film on an edge-plane pyrolytic graphite electrode (EPG) has been obtained and the catalytic activity of the enzyme to aldrin has been demonstrated by the cyclic voltammetry.
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Authors
Li Zhang, Xuequn Liu, Chuntai Wang, Xinqiong Liu, Gang Cheng, Yunhua Wu,