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Antimicrobial peptides from Bacillus spp. and strategies to enhance their yield

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Abstract

Antibiotic resistance is a growing concern that is affecting public health globally. The search for alternative antimicrobial agents has become increasingly important. Antimicrobial peptides (AMPs) produced by Bacillus spp. have emerged as a promising alternative to antibiotics, due to their broad-spectrum antimicrobial activity against resistant pathogens. In this review, we provide an overview of Bacillus-derived AMPs, including their classification into ribosomal (bacteriocins) and non-ribosomal peptides (lipopeptides and polyketides). Additionally, we delve into the molecular mechanisms of AMP production and describe the key biosynthetic gene clusters involved. Despite their potential, the low yield of AMPs produced under normal laboratory conditions remains a challenge to large-scale production. This review thus concludes with a comprehensive summary of recent studies aimed at enhancing the productivity of Bacillus-derived AMPs. In addition to medium optimization and genetic manipulation, various molecular strategies have been explored to increase the production of recombinant antimicrobial peptides (AMPs). These include the selection of appropriate expression systems, the engineering of expression promoters, and metabolic engineering. Bacillus-derived AMPs offer great potential as alternative antimicrobial agents, and this review provides valuable insights on the strategies to enhance their production yield, which may have significant implications for combating antibiotic resistance.

Key points

Bacillus-derived AMP is a potential alternative therapy for resistant pathogens

Bacillus produces two main classes of AMPs: ribosomal and non-ribosomal peptides

AMP yield can be enhanced using culture optimization and molecular approaches

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(Modified from Caulier et al., 2019)

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Funding

This research was supported by the Ministry of Higher Education Malaysia under the Fundamental Research Grant Scheme (FRGS/1/2021/STG01/UPM/02/1) and the National Research Foundation of Korea (NRF) grant (No. 2021R1G1A1010154) funded by the Korea government (MSIT). PSL and PE were sponsored by a Graduate Research Fellowship and Special Graduate Research Allowance Scheme from Universiti Putra Malaysia, respectively.

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SS, PSL, and WNIWAK contributed to the conceptualization of the review. PSL, PE, and MMAB contributed to the original draft preparation, including literature search, data analysis, and writing. SS, NMY, WNIWAK, MSMA, SAA, SNO, and SL contributed to the manuscript review and editing, providing critical feedback and revisions. All authors read and approved the final manuscript.

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Correspondence to Suriana Sabri.

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The authors declare no competing interests.

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Puan, S.L., Erriah, P., Baharudin, M.M.Aa. et al. Antimicrobial peptides from Bacillus spp. and strategies to enhance their yield. Appl Microbiol Biotechnol 107, 5569–5593 (2023). https://doi.org/10.1007/s00253-023-12651-9

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  • DOI: https://doi.org/10.1007/s00253-023-12651-9

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