1.
Dokl Biochem Biophys
; 500(1): 308-311, 2021 Sep.
Article
in English
| MEDLINE
| ID: mdl-34697733
ABSTRACT
GC-rich stretches in the DNA minor groove are the established intracellular targets for the aureolic acid group of antibiotics such as olivomycin A and its semisynthetic analogue olivamide. We demonstrated here that both antibiotics at nanomolar concentrations inhibited transcription of the c-Myc oncogene in cultured human tumor cells. The mechanism of transcriptional inhibition did not require the full-length binding site for Sp1, a GC-dependent transcriptional factor. GC quartets with the nucleotide sequences optimal for drug binding are sufficient for c-Myc transcriptional block by the aureolic acid derivatives.