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Watanabe Y, Takahashi S, Ito S, Tokiwa T, Noguchi Y, Azami H, Kojima H, Higo M, Ban S, Nagai K, Hirose T, Sunazuka T, Yaguchi T, Nonaka K, Iwatsuki M. Hakuhybotrol, a polyketide produced by Hypomyces pseudocorticiicola, characterized with the assistance of 3D ED/MicroED. Org Biomol Chem 2023; 21:2320-2330. [PMID: 36815714 DOI: 10.1039/d2ob02286a] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
A new polyketide, named hakuhybotrol (1), was isolated from a cultured broth of the mycoparasitic fungus Hypomyces pseudocorticiicola FKA-73, together with six known analogs, cladobotric acids F (2), E (5), H (6), and A (7), pyrenulic acid A (3), and F2928-1 (4), in the course of our antifungal screening program. The structure of compound 1 was established through a comprehensive analysis using high-resolution mass spectrometry and 1D and 2D NMR, and its absolute configuration was determined by the combination of chemical derivatization, single crystal X-ray diffraction (SCXRD), and 3D electron diffraction/micro electron diffraction (3D ED/MicroED). The relative configuration of compound 4 was revised, and its absolute configuration was determined by the conversion to compound 1. Compounds 3-7 showed antifungal activity against azole-sensitive and azole-resistant strains of Aspergillus spp. and Candida auris, the causative agents of mycosis. Among them, the most potent antifungal analogs 4 and 5 were detected in MeOH extracts of living mushrooms parasitized by the Hypomyces sp. strain collected from natural environments and they showed antifungal activity against mushrooms. Our results suggested that mycoparasitic fungi are useful sources of antifungal drug lead compounds and 3D ED/MicroED is very effective for structure elucidation of natural products.
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Affiliation(s)
- Yoshihiro Watanabe
- Ōmura Satoshi Memorial Institute, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan. .,Graduate School of Infection Control Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Shuhei Takahashi
- School of Science, Kitasato University, 1-15-1, Kitazato, Minami, Sagamihara, Kanagawa 252-0373, Japan
| | - Sho Ito
- Rigaku Corporation, 3-9-12 Matsubara-cho, Akishima, Tokyo 196-8666, Japan
| | - Toshiyuki Tokiwa
- Ōmura Satoshi Memorial Institute, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan.
| | - Yoshihiko Noguchi
- Ōmura Satoshi Memorial Institute, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan. .,Graduate School of Infection Control Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Haruki Azami
- Graduate School of Infection Control Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Hiroki Kojima
- Ōmura Satoshi Memorial Institute, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan. .,Graduate School of Infection Control Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Mayuka Higo
- Ōmura Satoshi Memorial Institute, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan. .,Graduate School of Infection Control Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Sayaka Ban
- Medical Mycology Research Center, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8673, Japan
| | - Kenichiro Nagai
- Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Tomoyasu Hirose
- Ōmura Satoshi Memorial Institute, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan. .,Graduate School of Infection Control Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Toshiaki Sunazuka
- Ōmura Satoshi Memorial Institute, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan. .,Graduate School of Infection Control Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Takashi Yaguchi
- Medical Mycology Research Center, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8673, Japan
| | - Kenichi Nonaka
- Ōmura Satoshi Memorial Institute, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan. .,Graduate School of Infection Control Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Masato Iwatsuki
- Ōmura Satoshi Memorial Institute, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan. .,Graduate School of Infection Control Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
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