Method for improving in-vitro expression of cytochrome P450 enzyme family

An in vitro expression, cytochrome technology, applied in the fields of botanical equipment and methods, biochemical equipment and methods, plant genetic improvement, etc., can solve the problems of low yield and difficult to meet research needs, and achieve considerable economic benefits and a good society. effect of benefit

Inactive Publication Date: 2013-01-02
NANJING MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when using the classical method to prepare CYP450 and POR, it is found that the yield is very low, which is difficult to meet the research needs

Method used

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  • Method for improving in-vitro expression of cytochrome P450 enzyme family
  • Method for improving in-vitro expression of cytochrome P450 enzyme family
  • Method for improving in-vitro expression of cytochrome P450 enzyme family

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0032] Example 1

[0033] 1. Construction and identification of recombinant transfer vector pFastBac1-CYP2A13 plasmid

[0034] pFastBac1-CYP2A13 is kept in this laboratory. After screening on ampicillin resistance plates, Escherichia coli containing recombinant plasmids was obtained, and bacterial liquid DNA was extracted to obtain recombinant transfer vector plasmid DNA. Use double enzyme digestion to verify pFastBac1-CYP2A13.

[0035] 2. Construction and identification of recombinant eukaryotic expression virus Ac-Bacmid-CYP2A13 DNA

[0036] The constructed pFastBac1-CYP 2A13 recombinant plasmid was transformed into competent cells of DH10Bac Escherichia coli. With the help of the helper plasmid of DH10Bac Escherichia coli, it was transposed by Tn7 transposon, and the gene fragments of each CYP2A13 were inserted into the shuttle vector Bacmid. The kanamycin, gentamicin and tetracycline tertiary antibodies were screened and blue-white spot screened to obtain recombinant Ac-Bacmid-CYP

Example Embodiment

[0042] Example 2

[0043] Compared with Example 1, it is the same except that the cofactor in step 4 is 0.05-0.6mM 5-ALA.

Example Embodiment

[0044] Example 3

[0045] Compared with Example 1, except that the cofactor in step 4 is 0.01-0.4mM Fe 3+ Except for the difference, everything else is the same.

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Abstract

The invention relates to a cytochrome P450 enzyme, and especially relates to a method for improving in-vitro expression of a cytochrome P450 enzyme family. The method for improving in-vitro expression of the cytochrome P450 enzyme family is characterized in that an accessory factor in step D any one of the followings: (1) 0.5-6 microgram/ml Hemin; (2) 0.05-0.6 mM 5-ALA; (3) 0.01-0.4 mM Fe3+; and (4) a mixture of 0.05-0.6 mM 5-ALA and 0.01-0.4 mM Fe3+. CYC protein, POR protein and their coexpression conditions are systemically optimized for the first time; and the results show that when cells are treated by 0.03 mM Fe3+ and 0.2 Mm 5-ALA, the expression levels of the proteins and their activities are the highest. When the MOI of CYP is 5 pfu/cell, and the MOI of POR is 2 pfu/cell, the coexpression efficiency of the CYP and POR is the highest.

Description

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Claims

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Application Information

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Owner NANJING MEDICAL UNIV
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