This study successfully produced gilvusmycin by harnessing two highly homologous BGCs of gilvusmycin and CC-1065.Although no BGC has been identified for this natural product so far, our work strongly suggests that this BGC from Streptomyces indeed encodes gilvusmycin.We have successfully produced gilvusmycin by harnessing two highly homologous BGCs of gilvusmycin and CC-1065.Although no BGC has been identified for this natural product so far, our work strongly suggests that this BGC from Streptomyces sp.NRRL B-1347 (and S. yokosukanensis DSM 40224) indeed encodes gilvusmycin.Related BGCs are also natural DNA elements that can be used for synthetic biol.For example, compound 3 here is a newly discovered 'unnatural' natural product.Therefore, the strategy used in our present study is significant because such a strategy can also be harnessed to create new mols. using highly homologous BGCs.