Platensimycin is an experimental new drug being trialed in an effort to combat MRSA (Methicillin-resistant Staphylococcus aureus. Manufactured by a strain of Streptomyces platensis, it represents a previously unknown class of antibiotics, which acts by blocking enzymes involved in the synthesis of fatty acids, which bacteria need to construct cell membranes (β-ketoacyl-(acyl-carrier-protein (ACP)) synthase I/II (FabF/B)). Currently being researched by Merck. [Wiki]
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http://dx.doi.org/10.1002/anie.200702852
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