The invention relates to the technical field of
peptide extraction, in particular to
sipunculus nudus peptide and an extraction method and application thereof. According to the specific technical scheme, the method comprises the following steps: 1) crushing a
sipunculus nudus raw material, adding water, adding
sodium hydrogen sulfite and
ascorbic acid, and stirring and soaking for 10-15 minutes; 2)
grinding the soaked raw materials, and adjusting the pH value of the
slurry to be alkaline; (3) adding alkali
enzyme into the
slurry, carrying out
microwave enzymolysis for 45-50 minutes, adding papaya peptidase B, continuously carrying out
microwave enzymolysis for 45-50 minutes, heating, inactivating, cooling, carrying out
centrifugal filtration, and collecting filtrate; and 4) sequentially carrying out
microfiltration,
ultrafiltration and
sodium filtration on the obtained filtrate to obtain the product.
Microwave radiation is adopted for assisting enzymolysis, energy can be provided for an enzymolysis
system, the temperature needed by enzymolysis can be maintained, the enzymolysis efficiency is greatly improved, the prepared
sipunculus nudus peptide can stabilize iron ions, a safe and efficient iron supplementing preparation can be developed, meanwhile,
reproductive function decline caused by
obesity can be comprehensively repaired, the
advantage of multi-dimensional conditioning is achieved, and the sipunculus nudus peptide has a good application prospect. And the method is suitable for
metabolism-related reproductive disorder treatment.