Peptide of decreasing blood pressure of protein of acetes chinensis, preparing method and application

A technology of antihypertensive peptide and hairy shrimp, applied in the field of marine biology, can solve the problems of low added value, low added value, no development and utilization, etc., and achieve the effect of high ACE inhibition activity

Inactive Publication Date: 2005-08-31
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although artificially synthesized ACE inhibitors have obvious blood pressure lowering effects, but the side effects are too large, so it is now necessary to find safer, novel and efficient drugs for the treatment of hypertension
Now, different proteins are hydrolyzed by different enzymes, and many ACE-inhibiting short peptides are found in the hydrolyzate. These protein resources include milk protein, soybean protein, egg protein, chicken protein, marine fish protein, algae etc. Up to now, more than 200 enzymatically active peptides with ACE inhibitory activity have been reported, but the re

Method used

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  • Peptide of decreasing blood pressure of protein of acetes chinensis, preparing method and application
  • Peptide of decreasing blood pressure of protein of acetes chinensis, preparing method and application
  • Peptide of decreasing blood pressure of protein of acetes chinensis, preparing method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] (1) Preparation of protease preparation

[0058] Seed culture medium: take 0.3 part of beef extract by weight, 1 part of peptone, 2 parts of agar, 0.5 part of NaCl as culture medium, 98 parts of water, pH is 7.1, sterilized, streaked to connect Bacillus subtilis SM98011 (Bacillus.SubtilisSM98011 ) strains, cultivated at 30°C for 20 hours.

[0059] Fermentation medium: 3 parts of bean cake powder, 2 parts of corn flour, 1 part of bran, 0.4 part of Na2HPO4, 0.04 part of KH2PO4, 100 parts of water, and 0.3 part of soybean oil as defoamer. Sterilize at 120°C for 30 minutes, after cooling, put 10 parts of the bacterial suspension connected with seeds into a 150-liter fermenter with a sample volume of 70 liters, and at 30°C, the ventilation rate (V 风 / V 液 ·Time) 1:0.6, stirring at 330 rpm, and culturing for 36 hours. At this point the pH was 7.0.

[0060] (2) Preparation of enzymatic short peptides

[0061] First take by weighing 50 parts (fresh weight) of Chinese hairy ...

Embodiment 2

[0069] Embodiment 2: As described in Example 1, the difference is that the amount of raw material hairy shrimp is different, and the hairy shrimp of 45 parts (fresh weight) is beaten. Then add 50 parts (liquid weight) of protease preparation.

[0070] The short peptide of the present invention has high ACE inhibitory activity, and even after entering the digestive tract and undergoing enzymatic hydrolysis, the enzymatic hydrolysis product still has high antihypertensive activity. The present invention is characterized in that it integrates enzyme engineering technology and peptide purification and identification technology, deeply develops and utilizes hairy shrimp, a large amount of marine protein resource that has not been effectively utilized so far, and discovers a new amino acid sequence composition The ACE-inhibiting peptides ensured the functionality in vivo, which laid the foundation for the development of antihypertensive drugs in the future.

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Abstract

A depressor peptide with higher suppression activity to angiotensin-converting enzyme (ACE) and having 6 amino acids is prepared from the protein of Chinese shrimp through enzymolyzing, separation and purifying. Its short peptide with 12 sequences is chemically synthesized. It can be used to prepare antihypertensive medicine.

Description

(1) Technical field [0001] The invention relates to the separation and purification of an antihypertensive peptide with a new amino acid sequence from an enzymatic hydrolysis product of Chinese hairy shrimp (Accedes chinensis), a preparation method and application thereof, and belongs to the technical field of marine biology. (2) Background technology [0002] Short peptides obtained by partial enzymatic hydrolysis of food proteins have attracted more and more attention from food scientists. These short peptides have various activities, such as: enhancing immunity, increasing nutrient absorption rate, antihypertensive activity. Proteins with these activities have been purified from food protein hydrolysates. These peptides are inactive within the protein sequence and are only active when released from the protein by enzymatic hydrolysis or food processing. [0003] Angiotensin-converting enzyme (ACE) is a carboxypeptidase that can catalyze the conversion of angiotensin 1 in...

Claims

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Application Information

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IPC IPC(8): A61K38/04A61P9/12C07K5/06C07K5/08C07K5/10C07K7/06C12P21/02
Inventor 张玉忠何海伦陈秀兰吴昊周百成
Owner SHANDONG UNIV
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