The α-Glucosidase Inhibition Activities of Phaeochromycins D and E Isolated from Marine <i>Streptomyces</i> sp. FJ0218
Marine <i>Streptomyces</i> are an important source of naturally occurring active compounds. Out of 23 marine <i>Streptomyces</i> strains, 1 strain of <i>Streptomyces</i> sp. FJ0218 was selected for its high activity in inhibiting α-glucosidase. Two polyketides, ph...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-04-01
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| Series: | Molecules |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1420-3049/30/9/1993 |
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| Summary: | Marine <i>Streptomyces</i> are an important source of naturally occurring active compounds. Out of 23 marine <i>Streptomyces</i> strains, 1 strain of <i>Streptomyces</i> sp. FJ0218 was selected for its high activity in inhibiting α-glucosidase. Two polyketides, phaeochromycins D (<b>2</b>) and E (<b>1</b>), were isolated from the fermentation broth of this strain using bioactivity-guided column chromatography over RP-18, Sephadex LH-20, and silica gel. Their structures were determined using NMR data, HR-EI-MS, and single-crystal X-ray crystallography. Phaeochromycins D (<b>2</b>) and E (<b>1</b>) exhibited inhibitory activity against α-glucosidase, with IC<sub>50</sub> values of 10 mM and 25 mM, respectively. Lineweaver–Burk plots revealed that phaeochromycin E (<b>1</b>) acts as an uncompetitive inhibitor, while phaeochromycin D (<b>2</b>) acts as a non-competitive inhibitor. These findings suggest that there is potential for the pharmacological regulation of glucose levels through the use of polyketide phaeochromycins, emphasizing their significant impact on glucose management. |
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| ISSN: | 1420-3049 |