We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Optimization and Stability Assessment of Monochamus alternatus Antimicrobial Peptide MaltAtt-1 in Komagataella phaffii GS115 for the Control of Pine Wood Nematode.
- Authors
Jiang, Di; Xu, Xuhuizi; Wang, Zeguang; Yu, Chao; Wang, Zeqing; Xu, Yuda; Chu, Xu; Li, Ming; Zhang, Feiping; Hu, Xia
- Abstract
MaltAtt-1 is an antimicrobial peptide isolated from Monochamus alternatus with nematocidal activity against pine wood nematode. In this study, a eukaryotic expression system based on Komagataella phaffii GS115 was established, and its secretory expression of MaltAtt-1 was realized. The basic properties and secondary and tertiary structures of the antimicrobial peptide MaltAtt-1 were identified by bioinformatics analysis. MaltAtt-1 is a hydrophilic stable protein, mainly composed of an α-helix (Hh), β-folds (Ee), and irregular curls (Cc). The optimal fermentation conditions for MaltAtt-1 were determined by a single-factor test and the Box–Behnken response surface method, including an induction time of 72 h, induction temperature of 30 °C, culture medium of pH 7.6, methanol volume fraction of 2.0%, and an initial glycerol concentration of 1%. The stability of MaltAtt-1 indicated its resistant to UV irradiation and repeated freezing and thawing, but the antibacterial activity decreased significantly under the influence of high temperature and a strong acid and base, and it decreased significantly to 1.1 cm and 0.83 cm at pH 2.0 and pH 10.0, respectively. The corrected mortality of B. xylophilus achieved 71.94% in 3 h at a concentration of 300 mg·L−1 MaltAtt-1 exposure. The results provide a theoretical basis for the antimicrobial peptide MaltAtt-1 to become a new green and efficient nematicide.
- Subjects
ANTIMICROBIAL peptides; PINEWOOD nematode; TERTIARY structure; HIGH temperatures; ANTIBACTERIAL agents
- Publication
International Journal of Molecular Sciences, 2024, Vol 25, Issue 16, p8555
- ISSN
1661-6596
- Publication type
Article
- DOI
10.3390/ijms25168555