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ACS chemical biology

Carba-sugars activate the glmS-riboswitch of Staphylococcus aureus.


PMID 21486059

Abstract

The glmS-riboswitch is unique among riboswitch families as it represents a metabolite-dependent ribozyme that undergoes self-cleavage upon recognition of glucosamin-6-phosphate. The glmS-riboswitch is located in the 5'-untranslated region of bacterial genes involved in cell wall biosynthesis. Therefore, this riboswitch represents a promising target for developing new antibiotics. We describe the metabolite-dependent glmS-riboswitch of pathologically relevant and vancomycin-resistant Staphylococcus aureus and the discovery and synthesis of a carba-sugar with potency similar to that of the native metabolite glucosamine-6-phosphate in modulating riboswitch activity. This compound represents a valuable lead structure for the development of antibiotics with a novel mode of action.

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