Erythromycin thiocyanate acts by binding to bacterial 50S ribosomal subunits and inhibits RNA-dependent protein synthesis by blockage of transpeptidation and/or translocation reactions, without affecting synthesis of nucleic acid .Erythromycin thiocyanate
K-252b is an indolocarbazole isolated from the actinomycete Nocardiopsis and is a PKC inhibitor. K-252b can be used to inhibit extracellular kinases of cells in culture because it can’t pass through the cell membrane freely.
Drimentine A is a terpenylated diketopiperazine antibiotic originally isolated from Actinomycete bacteria. It is active against Gram-positive and Gram-negative bacteria, fungi, and yeast and has anthelmintic properties.
Drimentine B is a terpenylated diketopiperazine antibiotic originally isolated from Actinomycete bacteria. It is active against Gram-positive and Gram-negative bacteria, fungi, and yeast, and has anthelmintic properties. Drimentine B inhibits proliferation of NS-1 murine β lymphocyte myeloma cells by 41 and 59% in vitro when used at concentrations of 50 and 100 μg/ml, respectively.
IKD-8344 is a macrocyclic dilactone originally isolated from an actinomycete species and has diverse biological activities, including anticancer, antimicrobial, and anthelmintic properties.1,2,3 It is cytotoxic to L5178Y murine leukemia cells (IC50 = 0.54 ng/ml).1 IKD-8344 inhibits growth of the mycelial form of C. albicans (MIC = 6.25 μg/ml) and potentiates the activity of polymyxin B against the multidrug-resistant pathogenic bacterium B. cenocepacia.2,3 It is active against T. spiralis in vitro and in vivo.1
|1. Minami, Y., Yoshida, K., Azuma, R., et al. Structure of a novel macrodiolide antibiotic IKD-8344. Tetrahedron Lett. 33(48), 7373-7376 (1992).|2. Hwang, E.I., Yun, B.S., Yeo, W.H., et al. Compound IKD-8344, a selective growth inhibitor against the mycelial form of Candida albicans, isolated from Streptomyces sp. A6792. J. Microbiol. Biotechnol. 15(4), 909-912 (2005).|3. Loutet, S.A., El-Halfawy, O.M., Jassem, A.N., et al. Identification of synergists that potentiate the action of polymyxin B against Burkholderia cenocepacia. Int. J. Antimicrob. Agents 46(4), 376-380 (2015).
Kibdelone C is a member of a family of natural heterocyclic polyketides first isolated from a soil actinomycete, Kibdelosporangium. Kibdelones have been described as having potent and selective cytotoxicity against a panel of human tumor cell lines, and kibdelone C has low nanomolar effectiveness in these assays. Kibdelone C disrupts the actin cytoskeleton without directly binding actin or affecting its polymerization in vitro.
Resistoflavine is a metabolite of the marine actinomycete S. chibaensis. It slows the growth of and is cytotoxic to HMO2 and HepG2 cells with mean lethal concentrations (LC50) of 0.013 and 0.016 μg/ml, respectively.