urdamycin a

Urdamycin A is a bacterial metabolite originally isolated fromS. fradiaethat has antibacterial and anticancer activities.1,2It is active against a variety of Gram-positive and Gram-negative bacteria, includingB. subtilisand strains ofArthrobacterandStreptomyces, but not the fungusS. cerevisiae, in a disc assay when used at a concentration of 1 mg/ml.2Urdamycin A is cytotoxic to L1210 and HT-29, but not A549, cancer cells (IC50s = 7.5, 5, and >10 μg/ml, respectively).1

Urdamycin B, an antibiotic derived from the metabolic products of Streptomyces fradiae, effectively inhibits fungi and bacteria, and exhibits anti-proliferative activity against mouse leukemia cells L1210. Its potential uses include research on cancer, bacterial, and fungal infections [1] [2].