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Yamauchi S, Shimoda S, Kawahara A, Sugahara T, Yamamoto S, Kitabayashi M, Sogabe A, Jansen CA, Tobe R, Hirakawa R, Islam J, Furukawa M, Yoneyama H, Nochi T. Identification of four genes responsible for antimicrobial resistance of MEL-B against S. aureus. Biochem Biophys Res Commun 2024; 699:149566. [PMID: 38290176 DOI: 10.1016/j.bbrc.2024.149566] [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: 01/13/2024] [Accepted: 01/22/2024] [Indexed: 02/01/2024]
Abstract
There is increasing interest in the antimicrobial activity of mannosylerythritol lipids-B (MEL-B) against Gram-positive bacteria such as Staphylococcus aureus (S. aureus). However, the specific molecules involved in MEL-B's antimicrobial action against S. aureus have not been identified. This study utilized the Nebraska transposon mutant library (NTML), which contains 1920 mutants, each lacking three-quarters of the genes found in S. aureus. The NTML was screened to identify mutants resistant to MEL-B. Four mutants (Accession Number: SAUSA300_0904, SAUSA300_0752, SAUSA300_0387, and SAUSA300_2311) largely unaffected by incubation with MEL-B, indicating MEL-B resistance. Despite the strong binding of MEL-B to these mutants, the four molecules encoded by the deleted genes (yjbI, clpP, pbuX, or brpS) in each mutant were not directly recognized by MEL-B. Given that these molecules are not localized on the outer surface of S. aureus and that the antibacterial activity of MEL-B against S. aureus is facilitated by the effective transfer of two antibacterial fatty acids (caprylic acid and myristoleic acid) to S. aureus via ME, the deletion of each of the four molecules may alter the peptidoglycan structure, potentially inhibiting the effective transfer of these antimicrobial fatty acids into S. aureus.
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Affiliation(s)
- Shinya Yamauchi
- International Education and Research Center for Food and Agricultural Immunology, Graduate School of Agricultural Science, Tohoku University, Miyagi, 980-8572, Japan; Laboratory of Animal Functional Morphology, Graduate School of Agricultural Science, Tohoku University, Miyagi, 980-8572, Japan
| | - So Shimoda
- International Education and Research Center for Food and Agricultural Immunology, Graduate School of Agricultural Science, Tohoku University, Miyagi, 980-8572, Japan; Laboratory of Animal Microbiology, Graduate School of Agricultural Science, Tohoku University, Miyagi, 980-8572, Japan
| | - Akio Kawahara
- Toyobo Co., Ltd. Biotechnology Research Laboratory, Fukui, 914-8550, Japan
| | - Tomohiro Sugahara
- Toyobo Co., Ltd. Biotechnology Research Laboratory, Fukui, 914-8550, Japan
| | - Shuhei Yamamoto
- Toyobo Co., Ltd. Biotechnology Research Laboratory, Fukui, 914-8550, Japan; Toyobo Co., Ltd. Biotechnology Operating Department, Osaka, 530-0001, Japan
| | - Masao Kitabayashi
- Toyobo Co., Ltd. Biotechnology Research Laboratory, Fukui, 914-8550, Japan; Toyobo Co., Ltd. Biotechnology Operating Department, Osaka, 530-0001, Japan
| | - Atsushi Sogabe
- Toyobo Co., Ltd. Biotechnology Research Laboratory, Fukui, 914-8550, Japan; Toyobo Co., Ltd. Biotechnology Operating Department, Osaka, 530-0001, Japan
| | - Christine A Jansen
- Cell Biology and Immunology Group, Department of Animal Sciences, Wageningen University, Wageningen, 6708 WD, the Netherlands
| | - Ryuta Tobe
- International Education and Research Center for Food and Agricultural Immunology, Graduate School of Agricultural Science, Tohoku University, Miyagi, 980-8572, Japan; Laboratory of Animal Microbiology, Graduate School of Agricultural Science, Tohoku University, Miyagi, 980-8572, Japan
| | - Ryota Hirakawa
- International Education and Research Center for Food and Agricultural Immunology, Graduate School of Agricultural Science, Tohoku University, Miyagi, 980-8572, Japan; Laboratory of Animal Functional Morphology, Graduate School of Agricultural Science, Tohoku University, Miyagi, 980-8572, Japan; Laboratory of Animal Mucosal Immunology, Graduate School of Agricultural Science, Tohoku University, Miyagi, 980-8572, Japan
| | - Jahidul Islam
- International Education and Research Center for Food and Agricultural Immunology, Graduate School of Agricultural Science, Tohoku University, Miyagi, 980-8572, Japan; Laboratory of Animal Functional Morphology, Graduate School of Agricultural Science, Tohoku University, Miyagi, 980-8572, Japan
| | - Mutsumi Furukawa
- International Education and Research Center for Food and Agricultural Immunology, Graduate School of Agricultural Science, Tohoku University, Miyagi, 980-8572, Japan; Laboratory of Animal Functional Morphology, Graduate School of Agricultural Science, Tohoku University, Miyagi, 980-8572, Japan; Laboratory of Animal Mucosal Immunology, Graduate School of Agricultural Science, Tohoku University, Miyagi, 980-8572, Japan
| | - Hiroshi Yoneyama
- International Education and Research Center for Food and Agricultural Immunology, Graduate School of Agricultural Science, Tohoku University, Miyagi, 980-8572, Japan; Laboratory of Animal Microbiology, Graduate School of Agricultural Science, Tohoku University, Miyagi, 980-8572, Japan
| | - Tomonori Nochi
- International Education and Research Center for Food and Agricultural Immunology, Graduate School of Agricultural Science, Tohoku University, Miyagi, 980-8572, Japan; Laboratory of Animal Functional Morphology, Graduate School of Agricultural Science, Tohoku University, Miyagi, 980-8572, Japan; Laboratory of Animal Mucosal Immunology, Graduate School of Agricultural Science, Tohoku University, Miyagi, 980-8572, Japan; Division of Mucosal Vaccines, International Vaccine Design Center, The Institute of Medical Science, The University of Tokyo, Tokyo, 108-8639, Japan; Department of Animal Bioscience, University of Guelph, Ontario, N1G 2W1, Canada; Center for Professional Development, Institute for Excellence in Higher Education, Tohoku University, Miyagi, 980-8576, Japan.
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