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Kaweewan I, Mukai K, Rukthanapitak P, Nakagawa H, Hosaka T, Kodani S. Heterologous biosynthesis of myxobacterial lanthipeptides melittapeptins. Appl Microbiol Biotechnol 2024; 108:122. [PMID: 38229328 DOI: 10.1007/s00253-023-12834-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 09/28/2023] [Accepted: 10/30/2023] [Indexed: 01/18/2024]
Abstract
The myxobacteria are an attractive bioresource for bioactive compounds since the large size genome contains many biosynthetic gene clusters of secondary metabolites. The genome of the myxobacterium Melittangium boletus contains three biosynthetic gene clusters for lanthipeptide production. One of the gene clusters includes genes coding lanthipeptide precursor (melA), class II lanthipeptide synthetase (melM), and transporter (melT). The amino acid sequence of melA indicated similarity with that of known lanthipeptides mersacidin and lichenicidin A1 by the alignment. To perform heterologous production of new lanthipeptides, the expression vector containing the essential genes (melA and melM) was constructed by utilizing codon-optimized synthetic genes. The co-expression of two genes in the host bacterial cells of Escherichia coli BL21 (DE3) afforded new lanthipeptides named melittapeptins A-C. The structures of melittapeptins A-C including lanthionine/methyllanthionine bridge pattern were proposed based on protease digestion and MS/MS experiments. The native strain of M. boletus did not produce melittapeptins A-C, so heterologous production using the biosynthetic gene cluster was effective in obtaining the lanthipeptides. Melittapeptins A-C showed specific and potent antibacterial activity to the Gram-positive bacterium Micrococcus luteus. To the best of our knowledge, this is the first report of antibacterial lanthipeptides derived from myxobacterial origin. KEY POINTS: • New lanthipeptides melittapeptins were heterologously produced in Escherichia coli. • Melittapeptins showed specific antibacterial activity against Micrococcus luteus. • Melittapeptins were the first antibacterial lanthipeptides of myxobacterial origin.
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Affiliation(s)
- Issara Kaweewan
- Faculty of Agriculture, Shizuoka University, Shizuoka, Japan
- Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Keiichiro Mukai
- Graduate School of Medicine, Science and Technology, Shinshu University, Nagano, Japan
- Department of Biomolecular Innovation, Institute for Biomedical Sciences, Shinshu University, Nagano, Japan
| | | | - Hiroyuki Nakagawa
- Research Center for Advanced Analysis, Core Technology Research Headquarters, National Agriculture and Food Research Organization (NARO), Ibaraki, Japan
| | - Takeshi Hosaka
- Graduate School of Medicine, Science and Technology, Shinshu University, Nagano, Japan
- Department of Biomolecular Innovation, Institute for Biomedical Sciences, Shinshu University, Nagano, Japan
| | - Shinya Kodani
- Faculty of Agriculture, Shizuoka University, Shizuoka, Japan.
- Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka, Japan.
- College of Agriculture, Academic Institute, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka, 422-8529, Japan.
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Luo Y, Xu S, Frerk AM, van der Donk WA. Facile Method for Determining Lanthipeptide Stereochemistry. Anal Chem 2024; 96:1767-1773. [PMID: 38232355 PMCID: PMC10831782 DOI: 10.1021/acs.analchem.3c04958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 12/22/2023] [Accepted: 01/02/2024] [Indexed: 01/19/2024]
Abstract
Lanthipeptides make up a large group of natural products that belong to the ribosomally synthesized and post-translationally modified peptides (RiPPs). Lanthipeptides contain lanthionine and methyllanthionine bis-amino acids that have varying stereochemistry. The stereochemistry of new lanthipeptides is often not determined because current methods require equipment that is not standard in most laboratories. In this study, we developed a facile, efficient, and user-friendly method for detecting lanthipeptide stereochemistry, utilizing advanced Marfey's analysis with detection by liquid chromatography coupled with mass spectrometry (LC-MS). Under optimized conditions, 0.05 mg of peptide is sufficient to characterize the stereochemistry of five (methyl)lanthionines of different stereochemistry using a simple liquid chromatography setup, which is a much lower detection limit than current methods. In addition, we describe methods to readily access standards of the three different methyllanthionine stereoisomers and two different lanthionine stereoisomers that have been reported in known lanthipeptides. The developed workflow uses a commonly used nonchiral column system and offers a scalable platform to assist antimicrobial discovery. We illustrate its utility with an example of a lanthipeptide discovered by genome mining.
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Affiliation(s)
- Youran Luo
- Department
of Chemistry, University of Illinois at
Urbana–Champaign, Urbana, Illinois 61801, United States
| | - Shuyun Xu
- Department
of Chemistry, University of Illinois at
Urbana–Champaign, Urbana, Illinois 61801, United States
| | - Autumn M. Frerk
- Department
of Chemistry, University of Illinois at
Urbana–Champaign, Urbana, Illinois 61801, United States
- Carl
R. Woese Institute for Genomic Biology, University of Illinois at Urbana–Champaign, Urbana, Illinois 61801, United States
| | - Wilfred A. van der Donk
- Department
of Chemistry, University of Illinois at
Urbana–Champaign, Urbana, Illinois 61801, United States
- Carl
R. Woese Institute for Genomic Biology, University of Illinois at Urbana–Champaign, Urbana, Illinois 61801, United States
- Howard
Hughes Medical Institute, University of
Illinois at Urbana–Champaign, Urbana, Illinois 61801, United States
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