This invention discloses a method for preparing the multifunctional
bioactive peptide Aj-UBL from
sea cucumber, relating to the fields of
biotechnology and
biomedicine. Using the Aj-UBL coding sequence from
sea cucumber as a template, the method involves PCR amplification,
recombinant expression vector construction, engineered bacterial induction expression, bacterial
cell disruption,
affinity chromatography purification, and identification to obtain the
target peptide possessing triple activities of antibacterial,
antiprotozoal, and
antitumor activity. This invention employs an optimized
coupling process of
genetic engineering and
affinity chromatography to achieve high-purity, high-quality, and stable product preparation, while being
environmentally friendly and free from
drug resistance risks. It not only solves the problem of coordinated
disease control in
sea cucumber farming but also expands the high-value application of sea cucumber resources in the biomedical field, filling the technological gap in the large-scale preparation of multifunctional bioactive peptides from sea cucumber and the biological control of ciliates, possessing significant theoretical and practical application value.