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Kimishima A, Tsuruoka I, Tsutsumi H, Honsho M, Honma S, Matsui H, Sugamata M, Wasuwanich P, Inahashi Y, Hanaki H, Asami Y. A new tetronomycin analog, broad-spectrum and potent antibiotic against drug-resistant Gram-positive bacteria. Chem Biodivers 2024; 21:e202301834. [PMID: 38179845 DOI: 10.1002/cbdv.202301834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 01/04/2024] [Accepted: 01/04/2024] [Indexed: 01/06/2024]
Abstract
We discovered a new tetronomycin analog, C-32-OH tetronomycin (2) from the Streptomyces sp. K20-0247 strain, which produces tetronomycin (1). After NMR analysis of 2, we determined the planar structure. Futhermore, the absolute stereochemistry of 2 was deduced based on the biosynthetic pathway of 1 in the K20-0247 strain and a comparison of experimental electronic circular dichroism (ECD) results of 1 with 2. While 2 exihibits potent antibacterial activity aganist Gram-positive baceria including vancomycin-intermediate Staphylococcus aureus (VISA) strains and vancomycin-resistant Enterococci (VRE), the antibacterial activity of 2 shows 16-32-folds weaker than that of 1 suggesting that the C-34 methyl group in 1 is one of the very important functinal group. Moreover, we evaluated the ionophore activity of 1 and 2 and neither compound shows ionophore activity at reasonable concetrations. Our research suggests that 1 and 2 would have different target(s) from an ionophore mechanism in the antibacterial activity and tetronomycins are promising natural products for broad-spectrum antibiotics.
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Affiliation(s)
- Aoi Kimishima
- Graduate School of Infection Control Sciences, Kitasato University, 5-9-1 Shirokane Minato-ku, 108-8641, Tokyo, Japan
- Ōmura Satoshi Memorial Institute, Kitasato University, 5-9-1 Shirokane Minato-ku, 108-8641, Tokyo, Japan
| | - Iori Tsuruoka
- Graduate School of Infection Control Sciences, Kitasato University, 5-9-1 Shirokane Minato-ku, 108-8641, Tokyo, Japan
| | - Hayama Tsutsumi
- Graduate School of Infection Control Sciences, Kitasato University, 5-9-1 Shirokane Minato-ku, 108-8641, Tokyo, Japan
- Ōmura Satoshi Memorial Institute, Kitasato University, 5-9-1 Shirokane Minato-ku, 108-8641, Tokyo, Japan
| | - Masako Honsho
- Graduate School of Infection Control Sciences, Kitasato University, 5-9-1 Shirokane Minato-ku, 108-8641, Tokyo, Japan
- Ōmura Satoshi Memorial Institute, Kitasato University, 5-9-1 Shirokane Minato-ku, 108-8641, Tokyo, Japan
| | - Sota Honma
- Graduate School of Infection Control Sciences, Kitasato University, 5-9-1 Shirokane Minato-ku, 108-8641, Tokyo, Japan
- Ōmura Satoshi Memorial Institute, Kitasato University, 5-9-1 Shirokane Minato-ku, 108-8641, Tokyo, Japan
| | - Hidehito Matsui
- Graduate School of Infection Control Sciences, Kitasato University, 5-9-1 Shirokane Minato-ku, 108-8641, Tokyo, Japan
- Ōmura Satoshi Memorial Institute, Kitasato University, 5-9-1 Shirokane Minato-ku, 108-8641, Tokyo, Japan
| | - Miho Sugamata
- Graduate School of Infection Control Sciences, Kitasato University, 5-9-1 Shirokane Minato-ku, 108-8641, Tokyo, Japan
- Ōmura Satoshi Memorial Institute, Kitasato University, 5-9-1 Shirokane Minato-ku, 108-8641, Tokyo, Japan
| | - Paul Wasuwanich
- University of Florida College of Medicine, Gainesville, FL 32610, USA
| | - Yuki Inahashi
- Graduate School of Infection Control Sciences, Kitasato University, 5-9-1 Shirokane Minato-ku, 108-8641, Tokyo, Japan
- Ōmura Satoshi Memorial Institute, Kitasato University, 5-9-1 Shirokane Minato-ku, 108-8641, Tokyo, Japan
| | - Hideaki Hanaki
- Graduate School of Infection Control Sciences, Kitasato University, 5-9-1 Shirokane Minato-ku, 108-8641, Tokyo, Japan
- Ōmura Satoshi Memorial Institute, Kitasato University, 5-9-1 Shirokane Minato-ku, 108-8641, Tokyo, Japan
| | - Yukihiro Asami
- Graduate School of Infection Control Sciences, Kitasato University, 5-9-1 Shirokane Minato-ku, 108-8641, Tokyo, Japan
- Ōmura Satoshi Memorial Institute, Kitasato University, 5-9-1 Shirokane Minato-ku, 108-8641, Tokyo, Japan
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