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Bradyrhizobium monooxygenase and application thereof to preparation of chiral sulfoxide

A technology of monooxygenase and thioether monooxygenase, which is applied in the field of bioengineering technology, can solve the problems of low conversion rate, low conversion rate of large sterically hindered sulfoxide compounds, poor selectivity, etc., and achieves simple operation, Good industrial application prospect, easy industrial amplification effect

Active Publication Date: 2018-09-25
EAST CHINA UNIV OF SCI & TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of poor selectivity and low conversion rate in the production of sulfoxide compounds by chemical method in the prior art and low conversion rate of biocatalyzed synthesis of large sterically hindered sulfoxide compounds, the present invention provides a screened Bradyrhizobium oligotrophicum ECU1212

Method used

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  • Bradyrhizobium monooxygenase and application thereof to preparation of chiral sulfoxide
  • Bradyrhizobium monooxygenase and application thereof to preparation of chiral sulfoxide
  • Bradyrhizobium monooxygenase and application thereof to preparation of chiral sulfoxide

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preparation example Construction

[0069] That is, the present invention discloses a method for preparing the above-mentioned monooxygenase, culturing the above-mentioned recombinant expression transformant, and then isolating the monooxygenase therefrom.

[0070] The present invention also provides an application of the above-mentioned Bradyrhizobium oligotrophicum ECU1212 or monooxygenase in the asymmetric catalytic oxidation of latent chiral sulfide compounds. Alternatively, Bradyrhizobium oligotrophicum ECU1212 can be used in its quiescent whole-cell form for the application of asymmetric catalytic oxidation of latent chiral thioether compounds.

[0071] Further optionally, the latent chiral thioether compound is selected from compounds represented by any of the following chemical formulas:

[0072]

[0073]

[0074] Among them, in the present invention, the Chinese names of the above chemical formulas I to IX are represented by sulfide anisole, p-methylanisole, p-methoxyanisole, 5-methoxy-2-(methylsu...

Embodiment 1

[0086] Screening of Bradyrhizobium oligotrophicum ECU1212

[0087] Soil collection is mainly divided into two parts, the direct collection of soil samples and the collection of soil samples after the pre-embedded substrate, a total of 252 soil samples.

[0088] Direct soil sample collection: collect relatively moist soil, generally mostly water sources, plants, contaminated substrates, etc., dig out the soil 2-3cm from the ground, about 3-5g, put the used soil samples in a low-temperature, Store in a dry place, or put it directly in a 1.5mL Eppendorf tube and store it in a refrigerator at 4°C. The collection locations are as follows: Shanghai Fengxian Chemical Industry Zone, Xinhua Hospital, orchards, vegetable farms, near garbage bins, near rivers, green belts, campuses (Xuhui or Fengxian campus of East China University of Science and Technology), greening of residential areas, botanical gardens, etc.

[0089] Embedded substrate: Lansoprazole sulfide is white powder, insolub...

Embodiment 2

[0093] Preparation of resting cells of Bradyrhizobium oligotrophicum ECU1212

[0094] The Bradyrhizobium oligotrophicum ECU1212 obtained by screening as in Example 1 was inoculated into rich medium (glucose 15g / L, peptone 10g / L, yeast extract 5g / L, NaH 2 PO4 0.5g / L, MgSO 4 0.5 g / L, NaCl 10 g / L, pH 7.0), 28°C, 180 rpm shaker for 24 hours, then centrifuged at 5000×g for 10 min to collect wet cells. The collected wet cells were frozen at -80°C for 12h, and then dried at a low temperature for 20h with a freeze dryer to obtain freeze-dried cells, which were stored in a refrigerator at 4°C.

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Abstract

The invention discloses bradyrhizobium monooxygenase, a gene for encoding the monooxygenase, a recombinant expression vector comprising the gene, a recombinant expression transformant, a method for preparing the monooxygenase by the recombinant expression transformant and an application of the monooxygenase to preparation of optical pure chiral sulfoxide, and particularly relates to a method for preparing a razole medicine by asymmetric oxidation of catalytic razole precursor sulfur ether. Compared with other methods for preparing optical pure sulfoxide, a product prepared by the monooxygenaseserving as a catalyst is high in optical purity, avoids generation of sulphone serving as a by-product and has the advantages of mild reaction conditions, simplicity and convenience in operation, easiness in amplification and the like. Therefore, the monooxygenase has an excellent industrial application prospect in synthesis of a series of medicine intermediates and razole medicines, particularlyright-handed rotation lansoprazole.

Description

technical field [0001] The invention belongs to the technical field of bioengineering, and in particular relates to a bradyrhizobium monooxygenase, a gene encoding the enzyme, a recombinant expression vector containing the gene and a recombinant expression transformant, and the recombinant expression transformant is used to prepare the monooxygenase Oxygenase method, and preparation of optically pure chiral sulfoxide by using said monooxygenase, especially method for catalyzing the oxidation of thioether precursor of azoles to prepare azoles. Background technique [0002] Chiral sulfoxide has extensive and important application value, and its use can be roughly divided into several categories: chiral auxiliary reagents, chiral ligands, chiral catalysts, chiral drugs and drug intermediates. [0003] Some chiral sulfoxides are important intermediates of drugs containing chiral centers of sulfur atoms or the drugs themselves. For example, a series of benzopyrazole proton pump ...

Claims

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Application Information

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IPC IPC(8): C12N1/20C12N9/02C12N15/53C12P11/00C12P17/10C12P17/16C12R1/01
CPCC12N9/0073C12P11/00C12P17/16C12Y114/13022C12N1/205C12R2001/01C12P17/165C12P41/002C12Y113/12C12P17/10
Inventor 郁惠蕾张龑许建和赵骞潘江刘峰林国强
Owner EAST CHINA UNIV OF SCI & TECH
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