Antimicrobial Activity and Stability of Antimicrobial Peptide Derived from Pepper Seeds

  • YANG Yemei ,
  • LIU Zhiyun ,
  • ZANG Bing ,
  • HAN Yuzhu
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  • 1. Chongqing Academy of Animal Sciences, Chongqing 402460, China;
    2. College of Animal Science, Southwest University, Chongqing 402460, China

Received date: 2019-03-06

  Online published: 2019-09-17

Abstract

This experiment aimed to clarify the potential of antimicrobial peptides(AMPs)derived from pepper seeds as a novel antimicrobial substance. The antimicrobial activity of AMPs derived from pepper seeds against 23 common agricultural spoilage bacteria, foodborne pathogens and plant pathogens were studied. The stability of AMPs derived from pepper seeds under different temperatures, pH, metal ions, protease, ultraviolet light and denaturant were carried out. The results showed that the AMPs derived from pepper seeds could inhibit some kinds of bacteria and could inhibit the selected 13 strains of fungi, showing its broad-spectrum antibacterial activity. The AMPs derived from pepper seeds had good thermal stability,the antimicrobial activity was unchanged after 121℃ heat treatment for 15 min. Under acidic conditions, the antimicrobial activity of AMPs derived from pepper seeds decreased. However, the antimicrobial activity of AMPs derived from pepper seeds could still be maintained 80% under pH 2 for 4 h. Under alkaline conditions, the antimicrobial activity of AMPs derived from pepper seeds was higher than that of the control. When treated at pH 12 for 4 h, the antimicrobial activity was up to 135.38%. The AMPs derived from pepper seeds was sensitive to Fe2+. It had good stability to other metal ions (Na+, K+, Ca2+, Mg2+, Mn2+ and Cu2+); AMPs derived from pepper seeds was not sensitive to proteases; the antimicrobial activity of AMPs derived from pepper seeds was stable after UV irradiation for 0 to 36 h and 0 to 6 mol/L urea treated. To sum up, the AMPs derived from pepper seeds is a kind of antimicrobial protein active substance with wide antimicrobial spectrum, and has good stability under temperature, metal ion, protease, ultraviolet and denaturants, while alkaline conditions can significantly improve the antimicrobial activity. It has the potential to develop into a novel antiseptic preservative, biomedical or biocontrol agent.

Cite this article

YANG Yemei , LIU Zhiyun , ZANG Bing , HAN Yuzhu . Antimicrobial Activity and Stability of Antimicrobial Peptide Derived from Pepper Seeds[J]. Chinese Journal of Animal Nutrition, 2019 , 31(9) : 4322 -4330 . DOI: 10.3969/j.issn.1006-267x.2019.09.047

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