Delta 8 desaturase new gene derived from pavlova viridis

A desaturase and gene technology, applied in the field of desaturase genes and their separation, can solve the problems of different enzyme activities and functions, differences in sequence structure, etc.

Inactive Publication Date: 2015-01-21
青岛东方商旅置业有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, several delta8 desaturases from different species have been isolated and identified in microalgae, but the homologous enzymes of different species obviously have sequence and structural differences, which lead to differences in their enzymatic activities and functions

Method used

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  • Delta 8 desaturase new gene derived from pavlova viridis

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Embodiment Construction

[0018] The isolation process of Pavlova viridis delta8 desaturase gene is as follows:

[0019] (1) Obtain the total mRNA of Pavlova viridis using conventional mRNA extraction and separation means in the art, and use primer OligodT to reverse transcribe it into cDNA by conventional means in the art;

[0020] (2) Using cDNA as a template, design primers P8F and P8R according to the conservatism of the delta8 desaturase homologous gene to amplify the gene in the conserved region. The primer sequence is: P8F: 5'-CGTACGGGAGCGAGGCGCTG-3'; P8R: 5'-CCCTGGATAGCTTTAGACGTG-3'; PCR reaction conditions: 94oC 3 min; 94oC 30 s, 58oC 30 s, 72oC 1 min, 30 cycles; 72oC 10 min; The size of the obtained PCR product is about 530bp;

[0021] (3) The amplification reaction at the 3' end was carried out using cDNA as a template and using the SMART RACE cDNA amplification kit. The amplification primers used were: UPM (10×universal primer mix); des8-3 CATGCGATACATGCCCACG. The gradient PCR reaction pro...

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Abstract

The invention discloses delta 8 desaturase new gene derived from pavlova viridis. Polyunsaturated fatty acids, such as timnodonic acid EPA and docosahexaenoic acid DHA, are important nutrient substances which are necessary for a human body and cannot be synthesized by the human body per se. Aiming at microalgae, namely, pavlova viridis, which can synthesize EPA and DHA naturally, the application adopts conservative district sequence amplification combined with RACE to clone so as to obtain a new delta 8 fatty acid desaturase gene. Due to the obtaining of the gene, basis is provided for further knowing and utilizing an EPA and DHA biosynthesis process which has extremely great practical significance.

Description

technical field [0001] The application belongs to the technical field of gene cloning and separation, and in particular relates to a desaturase gene related to the synthesis of polyunsaturated fatty acids derived from microalgae and its separation method. Background technique [0002] Polyunsaturated fatty acids are essential nutrients for the human body, and microalgae are an important biological resource because they are rich in polyunsaturated fatty acids. Pavlova viridis is rich in EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid), and is a good experimental material for identifying and cloning polyunsaturated fatty acid-related synthesis genes. [0003] The full name of RACE is rapid-amplification of cDNA ends, which is a commonly used technology for rapid cloning of cDNA ends by PCR. In this experiment, RACE technology was used to obtain the full-length sequence of the target mRNA fragment. [0004] In the biosynthetic pathway of EPA and DHA in microalgae, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N15/10C12N15/53
Inventor 不公告发明人
Owner 青岛东方商旅置业有限公司
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