The invention discloses a method for extracting an
antibacterial peptide from
pearl oyster meat, which comprises the following steps: taking the
pearl oyster meat after pretreatment, adding
ice water for cold homogenation so as to get homogenate; adding flavourzyme into the homogenate, uniformly mixing, then regulating the working frequency of ultrasonic
waves to 35kHz, regulating the strength of the ultrasonic
waves to 280-360W and regulating the temperature to 50-65 DEG C for performing ultrasonic treatment for 90-100 minutes; continuing to performing enzymolysis on the homogenate for 1-2 hours after the ultrasonic treatment still in a constant-temperature water bath at the temperature of 50-65 DEG C and then performing
enzyme inactivation and cooling treatment for getting enzymatic
hydrolysate; and performing centrifugal treatment on the enzymatic
hydrolysate, taking supernatant liquid, regulating the operation pressure of membrane separation to 2-3bar, regulating the temperature to 3-10 DEG C, utilizing the membrane
separation technology for performing
ultrafiltration treatment, collecting separation liquid with the intercepting molecular weight of 5000-10000Da, freeze-
drying and then getting an
antibacterial peptide product of the
pearl oyster meat. The method uses the ultrasonic wave technology to assist the
hydrolysis of the flavourzyme for carrying out the extraction of the
antibacterial peptide in the pearl
oyster meat, so that the operation is simple, the
hydrolysis rate and the
antibacterial activity can be improved, the
hydrolysis time is shortened, the production cost is low, the product is safe, waste pearl
oyster meat after opening pearls can be utilized with high value and further the
economic benefits of a manufacturer are improved.