Strain for producing high-activity keratin hydrolase and application of strain

Abstract

The invention provides a production strain of high-yield keratin hydrolase and application of the strain, and particularly relates to anti-radiation deinococcus for producing keratin hydrolase. The strain expresses keratin hydrolase high in activity and wide in application range. The anti-radiation deinococcus can efficiently produce keratin hydrolase at low cost, and is very high in application value.

Description

technical field [0001] The invention belongs to the field of bioengineering. Specifically, the invention relates to a bacterial strain producing highly active keratin hydrolase and application thereof. Background technique [0002] Feather is an important by-product of poultry breeding and slaughtering industry. my country has abundant feather production. At present, the annual output of feather reaches more than 1.2 million tons. Feathers are rich in protein and amino acids. Reasonable use of feathers can reduce the pollution of waste to the environment on the one hand, and on the other hand can be used as a feed protein for livestock and poultry feeding. [0003] Feathers are the outer protective layer of birds, and they are highly resistant to stress. The analysis of feather protein shows that sulfur-containing amino acids account for a relatively large proportion of the total amino acids. In this way, in addition to many hydrogen bonds and salt bonds, there are also a l...

AI Technical Summary

Problems solved by technology

The analysis of feather protein shows that sulfur-containing amino acids account for a relatively large proportion of the total amino acids. In this way, in addition to many hydrogen bonds and salt bonds, there are also a large number of disulfide bonds in the feather protein molecule and between molecules. Therefore, Ordinary proteases are difficult to degrade feather protein, resulting in poor digestion, which is one of the main problems of feather protein as a protein source for animal feed

[0004] At present, the industrial method of processing feather meal is generally high-temperature and high-pressure cooking, which will lead to the denaturation of some heat-sensitive amino acids, the production of some non-nutritive amino acids, the decrease of product stability, and the indigestion of animals after eating.

Although the microbial degradation method has mild reaction conditions, it is still in the stage of laboratory research. On the other hand, because it consumes a lot of energy during the fermentation process, it will greatly increase the production cost of feather meal, so it cannot be used in actual production. application

[0005] Currently known bacteria that decompose keratin are distributed in bacteria, actinomycetes and fungi, mainly including Bacillus licheniformis, Thermomonas, Candida albicans and Streptomyces, etc. Ineffective

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