用于抑杀革兰氏阴性菌的抗菌肽组合物及其应用

The chemically synthesized antimicrobial peptides Thanatin and BF-15a3 combination solves the problems of antibiotic resistance and limited application of antimicrobial peptides, achieving highly efficient inhibition and killing of Gram-negative bacteria and food preservation, with good biosafety and application prospects.

CN117430673BActive Publication Date: 2026-07-17JIANGSU ACAD OF AGRI SCI

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGSU ACAD OF AGRI SCI
Filing Date
2022-07-22
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

The overuse of existing antibiotics has led to serious problems of bacterial resistance, and there is an urgent need for new antimicrobial agents to address Gram-negative bacterial infections, especially the threat of Escherichia coli O157:H7. Furthermore, the application of antimicrobial peptides in the food and pharmaceutical fields is limited by issues such as cost, toxicity, and stability.

Method used

A chemically synthesized antimicrobial peptide Thanatin and BF-15a3 composition in a mass ratio of 1:1.5-3 is used to prepare antibacterial agents, pharmaceuticals, and food preservatives. Through synergistic effects, the bactericidal effect is improved while reducing the dosage and maintaining biosafety.

Benefits of technology

This composition exhibits excellent antibacterial activity against Gram-negative bacteria, effectively inhibits and kills multidrug-resistant bacteria, reduces the amount of antimicrobial peptides used, maintains bactericidal effect, and does not lead to bacterial resistance. It is suitable for food and pharmaceuticals and has broad application prospects.

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Abstract

本发明公开了用于抑杀革兰氏阴性菌的抗菌肽组合物及其应用。一种抗菌肽组合物,所述抗菌肽组合有两种抗菌肽组成,分别为Thanatin和BF‑15a3;所述抗菌肽Thanatin的序列如SEQ ID NO.1所示;所述抗菌肽BF‑15a3的序列如SEQID NO.2所示。发明中的抗菌肽组合物不仅具有协同杀死普通病原微生物的作用,而且对临床分离的多药耐药病原菌表现出十分优异的抗菌活性,并且没有表现出溶血活性。抗菌肽组合物使用的抗菌肽为人工合成,具有分子量小、人工合成方便,杀菌作用强、抗菌谱广、溶血活性低等优点,具有广泛的应用前景。
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