A kind of aspergillus oryzae phospholipase c and its coding gene and application

A phospholipase and phosphatidylcholine technology, which can be used in application, genetic engineering, plant genetic improvement and other directions, can solve the problems of low yield and poor stability of phospholipase C

Active Publication Date: 2022-05-03
CHINA AGRI UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there have been some research reports on the heterologous expression of phospholipase C gene, the yield of phospholipase C is still low, the substrate specificity is highly concentrated, and the stability is poor (Yu Zhenzhen, Chang Ming, Liu Ruijie, etc. Phospholipase C Research progress in enzymatic degumming. China Oils, 2013,38(7):19-22)

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of aspergillus oryzae phospholipase c and its coding gene and application
  • A kind of aspergillus oryzae phospholipase c and its coding gene and application
  • A kind of aspergillus oryzae phospholipase c and its coding gene and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] Embodiment 1, cloning and expression of Aspergillus oryzae phospholipase C gene AoPC

[0099] 1. Amplification of gene AoPC

[0100] 1. Extract the RNA of Aspergillus oryzae, reverse transcribe it into cDNA, use the cDNA as a template, and carry out PCR amplification with the following primers:

[0101] Upstream primer: 5'-AAA TACGTA AGCCCTGTCACGTCCGAG-3' (the underline indicates the SnaBI restriction site)

[0102] Downstream primer: 5'-AAA GCGGCCGC TTATACCGAAAAGGTATGGGGAGTCTTG-3' (the underline indicates the NotI restriction site).

[0103] 2. The PCR conditions in step 1 are pre-denaturation at 94°C for 5 minutes; denaturation at 94°C for 30 seconds, annealing at 55°C for 30 seconds, extension at 72°C for 90 seconds, 30 cycles; extension at 72°C for 5 minutes.

[0104] The amplified PCR product has the nucleotide sequence shown in Sequence Table 1 in the Sequence Listing, and the gene indicated by the nucleotide is named Gene AoPC, wherein the 58th-1395th posit...

Embodiment 2

[0147] Example 2, Purification and enzymatic property determination of recombinant phospholipase C AoPC

[0148] 1. Purification of recombinant phospholipase C AoPC

[0149] 1. Dialyze the fermentation supernatant of recombinant bacteria GS115 / pPIC9K-AoPC-PDI with 5L of 20mM Tris-HCl pH 7.5 buffer solution (buffer solution A) for 12h, and incubate at 4° C. , refrigerated and centrifuged at 10,000 rpm for 10 min, and the supernatant was reserved for later use to obtain a crude enzyme solution (concentration: 7.3 mg / mL).

[0150] 2. Purify the crude enzyme liquid obtained in step 1 through a QSFF strong anion exchange column (1.0×10 cm), using an AKTA protein purification system (purchased from GE Healthcare, USA), and the sample loading flow rate is 0.5 mL / min.

[0151] 3. After completing step 2, set the flow rate to 1mL / min, and use buffer solution A to elute to the eluent OD 280 <0.05.

[0152] 4. After completing step 3, use buffer solution A containing 150mM NaCl to elute...

Embodiment 3

[0201] Embodiment 3, the application of recombinant phospholipase C AoPC in soybean crude oil degumming

[0202] 1. Screening of optimal conditions for recombinant phospholipase C AoPC in soybean oil degumming

[0203] 1. Recombinant phospholipase C AoPC phospholipid degumming and acid addition optimization

[0204] AoPC+Crtric acid: Weigh 300g of crude soybean oil (the oil that has not undergone post-degumming treatment) in a 100mL Erlenmeyer flask with a stopper and heat it to 70°C in a water bath, add 0.3mL of citric acid solution (prepared with water with a concentration of 0-50%) Citric acid solution, constant volume, w / w), pretreatment at 200rpm for 20min. After the treatment is completed, cool to the preset temperature (20-50°C, can be 25°C), add 0.6mL of 4% (g:ml) NaOH aqueous solution to adjust the pH to 8, then add 1% distilled water and a certain amount of The 14.8mg / mL recombinant phospholipase C AoPC pure enzyme solution obtained in the first step of the prepara...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an aspergillus oryzae phospholipase C, its coding gene and application. The present invention provides a protein, which is phospholipase C or recombinant phospholipase C, which is the protein described in the following 1) or 2) or 3) or 4): 1) the amino acid sequence shown in sequence 2 in the sequence listing Protein; 2) A protein comprising amino acids at positions 20 to 464 of Sequence 2 in the sequence listing; 3) A co-expressed protein obtained by connecting a chaperone tag to the N-terminus or / and C-terminus of 1) or 2); 4) combining 1) Or the protein in 2) or 3) obtained through substitution and / or deletion and / or addition of one or several amino acid residues and having the same function. This research is dedicated to discovering phospholipase C from Aspergillus oryzae with novel source, high enzyme activity and unique properties, which has a huge market prospect.

Description

technical field [0001] The invention belongs to the field of food biotechnology, and in particular relates to an Aspergillus oryzae phospholipase C and its encoding gene and application. Background technique [0002] Phospholipase C (phospholipase C, EC 3.1.4.3) is a specific action on glycerophospholipid C 3 Ester hydrolase on the glycerol phosphate bond to generate diacylglycerol (DAG) and phospholipid compounds (Sebastián, Industrial uses of phospholipases: current state and future applications. Applied Microbiology and Biotechnology (2019) 103: 2571 –2582). Phospholipase C has attracted widespread attention because of its great application prospects in food, medicine, health care products, bioenergy and other industrial fields. In the food industry, phospholipase C can improve the quality of dairy products by increasing lipid stability; hydrolyzing the inherent phospholipid components in bread during bread baking can improve the emulsifying properties of food; and can ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C12N9/16C12N15/55C12N15/62C07K19/00C12N15/81C12N15/66C12N1/19C11B3/00C12R1/84
CPCC12N9/16C12N15/815C12N15/66C12Y301/04003C11B3/003C07K2319/35
Inventor 杨绍青江正强王灵闫巧娟相曼
Owner CHINA AGRI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap