1
|
Qader M, Mweetwa LL, Rämä T, Thissera B, Milne BF, Abdelmohsen UR, Orfali R, Tawfike A, Esheli M, Oluwabusola ET, Jaysainghe L, Jaspars M, Rateb ME. Discovery and structural assignment of (S)-sydosine from amphipod-derived Aspergillus sydowii MBC15-11F through HRMS, advanced Mosher and molecular modelling analyses. J Appl Microbiol 2023:lxad158. [PMID: 37480242 DOI: 10.1093/jambio/lxad158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/23/2023]
Abstract
AIMS This study aims to prioritize fungal strains recovered from under-explored habitats that produce new metabolites. HRMS dereplication is used to avoid structure redundancy and molecular modelling is used to assign absolute configuration. METHODS AND RESULTS MBC15-11F was isolated from an amphipod and identified using ITS, 28S, and β-tubulin phylogeny as Aspergillus sydowii. Chemical profiling using taxonomic-based dereplication identified structurally diverse metabolites, including unreported ones. Large-scale fermentation led to the discovery of a new N-acyl adenosine derivative: (S)-sydosine (1) which was elucidated by NMR and HRESIMS analyses. Two known compounds were also identified as predicted by the initial dereplication process. Due to scarcity of 1, molecular modelling was used to assign its absolute configuration without hydrolysis, and is supported by advanced Mosher derivatization. When the isolated compounds were assessed against a panel of bacterial pathogens, only phenamide (3) showed anti-Staphylococcus aureus activity. CONCLUSION Fermentation of A. sydowii yielded a new (S)-sydosine and known metabolites as predicted by HRESIMS-aided dereplication. Molecular modelling prediction of the absolute configuration of 1 agreed with advanced Mosher analysis.
Collapse
Affiliation(s)
- Mallique Qader
- School of Computing, Engineering and Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, Scotland, UK
- National Institute of Fundamental Studies, Hantana Road, Kandy, Sri Lanka
| | - Larry L Mweetwa
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Old Aberdeen, AB24 3UE, UK
| | - Teppo Rämä
- The Norwegian College of Fishery Science, UiT Arctic University of Norway, Tromsø, Norway
| | - Bathini Thissera
- School of Computing, Engineering and Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, Scotland, UK
| | - Bruce F Milne
- Department of Physics, University of Coimbra, Rua Larga 3004 - 516 Coimbra, Portugal
- Department of Chemistry, University of Aberdeen, Old Aberdeen, AB24 3UE, Scotland, UK
| | - Usama R Abdelmohsen
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia 61519, Egypt
- Department of Pharmacognosy, Faculty of Pharmacy, Deraya University, New Minia 61111, Egypt
| | - Raha Orfali
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Ahmed Tawfike
- Department of Pharmacognosy, Faculty of Pharmacy, Helwan University, 11795, Cairo, Egypt
| | - Manal Esheli
- School of Computing, Engineering and Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, Scotland, UK
- Food Science & Technology Department, Faculty of Agriculture, University of Tripoli, Tripoli 13538, Libya
| | - Emmanuel T Oluwabusola
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Old Aberdeen, AB24 3UE, UK
- DDT College of Medicine, Broadhurst Mall, P.O. BOX 70587, Gaborone, Botswana
| | - Lalith Jaysainghe
- National Institute of Fundamental Studies, Hantana Road, Kandy, Sri Lanka
| | - Marcel Jaspars
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Old Aberdeen, AB24 3UE, UK
| | - Mostafa E Rateb
- School of Computing, Engineering and Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, Scotland, UK
| |
Collapse
|