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Recombinant Escherichia coli strain related to production of quinic acid and its construction method and application

A technology of recombinant strains and Escherichia coli is applied in the biological field to achieve the effects of reducing production costs, stabilizing heredity, and reducing the cost of culture media

Active Publication Date: 2021-12-21
TIANJIN INST OF IND BIOTECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are few reports about the method of producing 3-dehydroquinic acid at present

Method used

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  • Recombinant Escherichia coli strain related to production of quinic acid and its construction method and application
  • Recombinant Escherichia coli strain related to production of quinic acid and its construction method and application
  • Recombinant Escherichia coli strain related to production of quinic acid and its construction method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0147] The construction of embodiment 1 escherichia coli recombinant strain QA05

[0148] With the plasmid pEASY-cat-sacB (as shown in SEQ ID NO:2) containing chloramphenicol resistance gene cat and fructan sucrose transferase gene sacB figure 2 (shown) is a template, and primer 701aroD-cat-sacB-s / aroD-cat-sacB-a is used to amplify the fragment aroD1 of homologous recombination in the first step. The sequence of primer 701 is:

[0149] aroD-cat-sacB-s:ggtcatggggttcggtgcctgacaggctgaccgcgtgcaggtgacggaagatcacttc

[0150] aroD-cat-sacB-a:cccgcaccaatgacgagatcttttacagttacggttttcaatcaaagggaaaactgtcc

[0151] Amplification system: 5×TransStart TM FastPfu Buffer 10 μL, dNTPs (2.5mmol / L each dNTP) 4 μL, DNA template 1 μL (20-50ng), forward primer (10 μmol / L) 2 μL, reverse primer (10 μmol / L) 2 μL, 100% DMSO 1 μL, TransStart TM FastPfu DNA Polymerase (2.5U / μL) 1 μL, deionized water 29 μL, total volume 50 μL.

[0152] The amplification conditions are: pre-denaturation at 94°C for 5...

Embodiment 2

[0172] The construction of embodiment 2 escherichia coli recombinant strain QA07

[0173] With the plasmid pEASY-cat-sacB (as shown in SEQ ID NO:2) containing chloramphenicol resistance gene cat and fructan sucrose transferase gene sacB figure 2 (shown) is a template, and the primer 707acrB-cat-sacB-s / acrB-cat-sacB-a is used to amplify the fragment acrB1 of the first step of homologous recombination. The sequence of primer 707 is:

[0174] acrB-cat-sacB-s:ctgtcagaattgggtatattggggcaggttgtcgtgaaggaattccctagtgacggaagatcacttc

[0175] acrB-cat-sacB-a:agttttccctggtgttggcgcagtattcgcgcaccccggtctagccggggatcaaagggaaaactgtc

[0176] Amplification system: 5×TransStart TM FastPfu Buffer 10 μL, dNTPs (2.5mmol / L each dNTP) 4 μL, DNA template 1 μL (20-50ng), forward primer (10 μmol / L) 2 μL, reverse primer (10 μmol / L) 2 μL, 100% DMSO 1 μL, TransStart TM FastPfu DNA Polymerase (2.5U / μL) 1 μL, deionized water 29 μL, total volume 50 μL.

[0177] The amplification conditions are: pre-dena...

Embodiment 3

[0198] Example 3 Construction of Escherichia coli recombinant strain QA10

[0199] With the plasmid pEASY-cat-sacB (as shown in SEQ ID NO:2) containing chloramphenicol resistance gene cat and fructan sucrose transferase gene sacB figure 2 (shown) is a template, and primer 1001 2-ackA-pta-cat-sacB-s / 2-ackA-pta-cat-sacB-a is used to amplify the fragment ackA-pta1 of the first step of homologous recombination. The sequence of primer 1001 is:

[0200] 2-ackA-pta-cat-sacB-s:ctgacgtttttttagccacgtatcaattataggtacttcctcctggtgtccctgttgatacc

[0201] 2-ackA-pta-cat-sacB-a:ttcagatatccgcagcgcaaagctgcggatgatgacgagaatagatacatcagagcttttacgag

[0202] Amplification system: 5×TransStart TM FastPfu Buffer 10 μL, dNTPs (2.5mmol / L each dNTP) 4 μL, DNA template 1 μL (20-50ng), forward primer (10 μmol / L) 2 μL, reverse primer (10 μmol / L) 2 μL, 100% DMSO 1 μL, TransStart TM FastPfu DNA Polymerase (2.5U / μL) 1 μL, deionized water 29 μL, total volume 50 μL.

[0203] The amplification conditions a...

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Abstract

The present invention provides recombinant Escherichia coli strains related to the production of quinic acid and their construction methods and applications, including recombinant Escherichia coli producing 3-dehydroquinic acid and recombinant Escherichia coli producing quinic acid, which, under aerobic conditions, Both can utilize the glucose inorganic salt medium for fermentation, which reduces the cost of the medium, thereby reducing the production cost of 3-dehydroquinic acid and quinic acid. And the 3-dehydroquinic acid produced by fermentation can produce quinic acid through a simple hydrogenation reaction, so it provides a theoretical basis for the industrial production of quinic acid, and the above-mentioned recombinant strains do not contain plasmids and are genetically stable .

Description

technical field [0001] The invention relates to the field of biotechnology, in particular to recombinant Escherichia coli producing quinic acid and its construction method and application, including recombinant Escherichia coli producing 3-dehydroquinic acid and recombinant Escherichia coli producing quinic acid. Background technique [0002] Quinic acid (quinic acid, QA), that is, 1,3,4,5-tetrahydroxycyclohexane 1-carboxylic acid, was first extracted and processed from cinchona bark, also known as cinchona acid. The medicinal effect of quinic acid monomer is not great, but as a pharmaceutical intermediate to synthesize other drugs with special activity, people are paying more and more attention. Caffeoylquinic acid is an important category of quinic acid derivatives. It exists widely in Chinese herbal medicines and has a protective effect on liver damage caused by carbon tetrachloride and macrophages. Using quinic acid as a chiral source can synthesize a variety of Drugs, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N1/21C12P7/42C12N15/10C12R1/19
CPCC12N9/88C12N15/102C12P7/42C12Y402/0101
Inventor 王钦宏陈五九江小龙彭彦峰张媛媛
Owner TIANJIN INST OF IND BIOTECH CHINESE ACADEMY OF SCI
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