Cited by 37Microbial Natural Products and BiosynthesisMarine Sponges and Natural ProductsMicrobial Metabolism and Applications

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Liquid Chromatography-Mass Spectrometry-Based Rapid Secondary-Metabolite Profiling of Marine Pseudoalteromonas sp. M2

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Abstract

The ocean is a rich resource of flora, fauna, and food. A wild-type bacterial strain showing confluent growth on marine agar with antibacterial activity was isolated from marine water, identified using 16S rDNA sequence analysis as Pseudoalteromonas sp., and designated as strain M2. This strain was found to produce various secondary metabolites including quinolone alkaloids. Using high-resolution mass spectrometry (MS) and nuclear magnetic resonance (NMR) analysis, we identified nine secondary metabolites of 4-hydroxy-2-alkylquinoline (pseudane-III, IV, V, VI, VII, VIII, IX, X, and XI). Additionally, this strain produced two novel, closely related compounds, 2-isopentylqunoline-4-one and 2-(2,3-dimetylbutyl)qunoline-4-(1H)-one, which have not been previously reported from marine bacteria. From the metabolites produced by Pseudoalteromonas sp. M2, 2-(2,3-dimethylbutyl)quinolin-4-one, pseudane-VI, and pseudane-VII inhibited melanin synthesis in Melan-A cells by 23.0%, 28.2%, and 42.7%, respectively, wherein pseudane-VII showed the highest inhibition at 8 µg/mL. The results of this study suggest that liquid chromatography (LC)-MS/MS-based metabolite screening effectively improves the efficiency of novel metabolite discovery. Additionally, these compounds are promising candidates for further bioactivity development.

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Crossref · 10.3390/md14010024

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  1. Paul, V.J. (1992). Ecological Roles of Marine Natural Products (Explorations in Chemical Ecology), Cornstock Press.

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Metadata

Authors
Kim, W., Kim, Y., Kim, J., Nam, B.-H., Kim, D.-G., An, C., Lee, J., Kim, P., Lee, H., Oh, J.-S., & Lee, J.
Affiliations
  • Gyeonggido Business and Science Accelerator (KR)
  • National Institute of Fisheries Science (KR)
  • Daegu Haany University (KR)
  • Chosun University (KR)
Corresponding author
Lee, Jong
Venue
Marine Drugs
Publisher
MDPI AG
Published
2016-01-20
Volume
14
Issue
1
Pages
24
ISSN
1660-3397 (ISSN-L)
OpenAlex
W2272503628
Cited by
37
References
21
Citations by year
2026: 2 · 2025: 3 · 2024: 3 · 2023: 4 · 2022: 3 · 2021: 4 · 2020: 6 · 2019: 7 · 2018: 3 · 2017: 2
FWCI
3.23
Type
journal article
Language
en
Open access
Locations
  • Marine Drugs (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Fisheries Research & Development Institute
Topics
  • Life Sciences › Immunology and Microbiology › Applied Microbiology and Biotechnology › Microbial Natural Products and Biosynthesis
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biotechnology › Marine Sponges and Natural Products
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biotechnology › Microbial Metabolism and Applications
Keywords
Pseudoalteromonas, marine bacteria, secondary metabolites, quinolone alkaloids, antibacterial activity, melanogenesis inhibition, melan-a cells, marine natural products
MeSH terms
Anti-Bacterial Agents, Chromatography, Liquid, Humans, Seawater, Pseudoalteromonas, Tandem Mass Spectrometry

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