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Saintopin is an antitumor antibiotic. Saintopin is also an inhibitor of DNA topoisomerases I and II. Saintopin induces DNA cleavage[1][2].

ChEBI: A member of the class of tetracenequinones that is tetracene-5,12-dione in which the hydrogens at positions 1, 3, 8, 10, and 11 have been replaced by hydroxy groups. Isolated from Paecilomyces.

Topoisomerase I; Topoisomerase II

[1] Yamashita Y, et al. Saintopin, a new antitumor antibiotic with topoisomerase II dependent DNA cleavage activity, from Paecilomyces. J Antibiot (Tokyo). 1990 Oct;43(10):1344-6. DOI:10.7164/antibiotics.43.1344
[2] eteurtre F, et al. Saintopin, a dual inhibitor of DNA topoisomerases I and II, as a probe for drug-enzyme interactions. J Biol Chem. 1994 Nov 18;269(46):28702-7. PMID:7961822