Exiguobacterium profundum and application thereof

Abstract

The invention provides an exiguobacterium profundum. The preservation number of the exiguobacterium profundum is CGMCC No.18990. The exiguobacterium profundum P-47-3 strain provided by the invention is used for fermenting fish paste. The strain P-47-3 used in the method is separated from a deep sea hydrothermal solution extreme environment; spores are produced, and the growth temperature ranges from 10 DEG C to 65 DEG C; growth and propagation can be performed under the salt concentration of 0 to 14%; general high-temperature bacteria mainly come from land environments such as hot spring and the like, are poor in salt resistance, can not grow at high salt conditions, and has great limitation in marine biological product fermentation, while the strain P-47-3 has halophilicity, so that the strain P-47-3 is not only suitable for marine organism fermentation, but also can consume salt in a metabolic process, the salt concentration in a fermentation product is further reduced, and the quality of the fermentation product is improved.

Description

technical field [0001] The invention belongs to the technical field of microbial screening application, and in particular relates to a thermophilic deep-sea microbacterium and its application. Background technique [0002] Fish meal is currently the main protein source in aquafeeds because of its high protein content, various essential amino acids, and easy absorption. China is a big aquaculture country in the world. In 2018, the total aquaculture output exceeded 50 million tons, accounting for more than 78% of my country's total aquatic product output. China is the country with the largest consumption of fishmeal. China's aquaculture industry consumes about 2.5 million tons of fishmeal (partially used for poultry farming) every year, of which 1.2 million tons are imported fishmeal and 1.3 million tons are domestic fishmeal. It can be seen that China's aquaculture industry relies on fishmeal resources and is also restricted by foreign fishmeal imports. [0003] In the pro...

AI Technical Summary

Problems solved by technology

(1) In the preparation process of enzymatic fish paste, only endogenous enzymes are used, and the enzymatic hydrolysis is not complete; the addition of commercial enzymes such as protease increases the cost; after the enzymatic hydrolysis reaction, a high temperature treatment of about 90 ° C is required to destroy the enzyme, which will destroy the anchovy Functional active substances; enzymatic hydrolysis products have poor fluidity and are easy to block pipelines

(2) In the preparation process of ordinary fermented fish paste, the fermented strains are generally from land sources and are used to ferment marine organisms, which are relatively poor in salt tolerance

At present, the thermoprotease-producing strains generally come from land hot springs and other environments. Due to the particularity of marine high-temperature environment sampling, the thermoprotease-producing strains isolated from the deep-sea high-temperature environment are used to ferment anchovy. There is no relevant report so far.

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