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A method for enzymolyzing tadpoles to extract polypeptides and the prepared polypeptides

A tadpole and enzymatic hydrolysis technology, applied in the field of active peptides, can solve the problems of enzyme consumption and high industrial production costs

Active Publication Date: 2019-06-25
BEIJING PEPMAGIC BIOTECH CORPORATION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current process of preparing polypeptides by enzymatic hydrolysis consumes a large amount of enzymes, which makes the industrial production cost higher

Method used

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  • A method for enzymolyzing tadpoles to extract polypeptides and the prepared polypeptides

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1, the preparation of immobilized nanozyme

[0039] (1) Weigh 10.812g of FeCl 3 ·H 2 O and 5.5724 g of FeSO 4 ·H 2 O(Fe 3+ and Fe 2+ The molar ratio is 2:1), added to 200mL of deionized water, stirred at 40°C, 500rpm under non-magnetic conditions for about 1h; then 2 Protect and continue to stir while adding ammonia water with a concentration of 8mol / L to keep the pH of the system at about 10. When the solution turns from yellow to black and the temperature rises to 82°C, continue to stir for about 1 hour at 400rpm under non-magnetic conditions; the reaction is over After cooling to room temperature, magnetic solid-liquid separation, the resulting precipitate is Fe3O 4The magnetic nanoparticles are washed with water until the pH is about 7, and temporarily stored in an aqueous acetic acid solution with a pH of 2-4 for later use, or vacuum freeze-dried for about 48 hours and stored at -20°C for a long time. Fe3O 4 The particle size of the magnetic nano...

Embodiment 2

[0044] Embodiment 2, the preparation of bullfrog tadpole enzymolysis polypeptide powder

[0045] (1) Collect 8-week-old live bullfrog tadpoles with a body weight of 24-25 g and a body length of about 15 cm after hatching, rinse them repeatedly with water to remove the attachments on the tadpole body surface; then place them in water for 2 days, and change the water 4 times during the period To remove the metabolites in the tadpoles; finally, treat them with 10% hydrogen peroxide for about 30 minutes to remove harmful substances on the surface of the tadpoles, wash them with water, and kill them by suffocation; vacuum freeze-dry and crush them into tadpole powder with a particle size of 80-100 μm.

[0046] Weigh 20kg of bullfrog tadpole powder, place it in the extraction kettle of a supercritical extraction device for degreasing treatment, the extraction pressure is 35MPa, the extraction temperature is 35°C, the extraction time is about 200min, and the degreased bullfrog tadpole...

Embodiment 3

[0050] Embodiment 3, the separation of the polypeptide PEPTIDE-X with antioxidant activity

[0051] Get the refining enzymolysis solution 50ml prepared in Example 2, through ultrafiltration (filter membrane selects 5000Da) cut off the component of molecular weight less than or equal to 5000Da; Then adopt chromatographic column separation and purification, packing is Sephadex G-25, mobile phase is aqueous solution, The column temperature is room temperature, and the detection wavelength is 280nm. Collect according to time, 20 minutes / tube, and measure the antioxidant activity of each tube of liquid. The higher the value, the better the oxidation resistance. Collect the tube with the highest absorbance value, that is, the tube with the best oxidation resistance.

[0052] The tube with the best oxidation resistance was separated and purified by RP-HPLC, using a C18 column, the mobile phase A was 0.1% TFA aqueous solution by volume, ultrasonically degassed before use, the mobile p...

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Abstract

The invention discloses a method for extracting polypeptide through tadpole enzymolysis and the polypeptide prepared by the method. According to the extraction method disclosed by the invention, an immobilized nano-enzyme technology is adopted, a mixture of Alcalase protease and bromelain is used, and a tadpole enzymolysis polypeptide extract with oxidation resisting activity and the polypeptide with the amino acid sequence of Glu-Trp-Ala-Pro-Pro-Ser-Lys-Leu-Leu-Leu-Lys are obtained, play a role in protecting type II pneumonocyte and can be used for preventing and / or treating lung injury.

Description

technical field [0001] The invention belongs to the technical field of active peptides, and in particular relates to a method for extracting polypeptides from enzymatically hydrolyzed tadpoles and polypeptides prepared by the method. Background technique [0002] Amphibians are sustainable natural resources. Their bodies contain a large number of biologically active molecules with special structures and complex functions. They are a treasure trove of medicines and health products to be developed. Tadpoles are the larvae of amphibians. According to the determination of biochemical components, the protein content in tadpole dry powder is as high as 80%, the fat content is only 4.9%, and the sugar content is 10%. In addition, it also contains trace amounts of calcium, iron, zinc, manganese, phosphorus, etc. elements, as well as multivitamins and free amino acids. Tadpoles have been used by folks since ancient times to treat diseases such as malnutrition and frailty in children...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P21/06C07K7/06C07K1/14C12N11/14C12N11/10A61P39/06A61P11/00
CPCC07K7/06C12N11/10C12N11/14C12P21/06Y02P20/54
Inventor 赵树民鲍勇刚石松传
Owner BEIJING PEPMAGIC BIOTECH CORPORATION LTD
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