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KMID : 0545120130230020184
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Journal of Microbiology and Biotechnology
2013 Volume.23 No. 2 p.184 ~ p.188
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Panosialins, Inhibitors of Enoyl-ACP Reductase from Streptomyces sp. AN1761
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Kwon Yun-Ju
Sohn Mi-Jin
Oh Tae-Gwon
Cho Sang-Nae
Kim Chang-Jin
Kim Won-Gon
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Abstract
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In the continued search for inhibitors of enoyl-acyl carrier protein (ACP) reductase, we found that four acylbenzenediol sulfate metabolites from Streptomyces sp. AN1761 potently inhibited bacterial enoyl-ACP reductases of Staphylococcus aureus, Streptococcus pneumoniae, and Mycobacterium tuberculosis. Their structures were identified as panosialins A, B, wA, and wB by MS and NMR data. They showed stronger inhibition against S. aureus FabI and S. pneumoniae FabK with IC50 of 3-5 μM than M. tuberculosis InhA with IC50 of 9-12 μM. They also exhibited a stronger antibacterial spectrum on S. aureus and S. pneumoniae than M. tuberculosis. In addition, the higher inhibitory activity of panosialin wB than panosialin B on fatty acid biosynthesis was consistent with that on bacterial growth, suggesting that they could exert their antibacterial activity by inhibiting fatty acid synthesis.
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KEYWORD
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panosialin, enoyl-ACP reductase, Staphylococcus aureus, antibacterial, inhibitor
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