Rebeccamycin
Encyclopedia
Rebeccamycin is a weak topoisomerase
I inhibitor isolated from Streptomyces
sp. structurally similar to staurosporine
. Does not show any inhibitory activity against protein kinases. Shows significant antitumor properties in vitro (IC50=480nM against mouse B16 melanoma cells and IC50=500nM against P388 leukemia cells).
Topoisomerase
Topoisomerases are enzymes that regulate the overwinding or underwinding of DNA. The winding problem of DNA arises due to the intertwined nature of its double helical structure. For example, during DNA replication, DNA becomes overwound ahead of a replication fork...
I inhibitor isolated from Streptomyces
Streptomyces
Streptomyces is the largest genus of Actinobacteria and the type genus of the family Streptomycetaceae. Over 500 species of Streptomyces bacteria have been described. As with the other Actinobacteria, streptomycetes are gram-positive, and have genomes with high guanine and cytosine content...
sp. structurally similar to staurosporine
Staurosporine
Staurosporine is a natural product originally isolated in 1977 from the bacterium Streptomyces staurosporeus.It was the first of over 50 alkaloids to be isolated with this type of bis-indole chemical structure...
. Does not show any inhibitory activity against protein kinases. Shows significant antitumor properties in vitro (IC50=480nM against mouse B16 melanoma cells and IC50=500nM against P388 leukemia cells).