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A semi-synthetic cyclic lipopeptide antibiotic isolated form the bacterium Streptomyces roseosporus with broad-spectrum anitbiotic activity against Gram-positive bacteria. Daptomycin has a distinct mechanism of action, in which it binds to bacterial membrane and causes rapid depolarization of the cell membrane due to calcium-dependant potassium efflux; the loss of membrane potential leads to inhibition of DNA, RNA and protein synthesis, resulting in bacterial cell death. This agent does not penetrate the outer membrane of gram-negative bacteria. Check for \'https://www.cancer.gov/about-cancer/treatment/clinical-trials/intervention/C47470\' active clinical trials using this agent. (\'http://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C47470\' NCI Thesaurus)
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