The riboflavin kinase encoding gene ribR of Bacillus subtilis is a part of a 10 kb operon, which is negatively regulated by the yrzC gene product.

The riboflavin kinase encoding gene ribR is situated within a 12 genes locus ytmI-ytnM of the Bacillus subtilis chromosome. Here we demonstrate that ribR is transcribed as part of a 10 kb ytmI-ytnM operon. The riboflavin overproduction phenotype of B.

Metalloregulation in Bacillus subtilis: the copZ chromosomal gene is involved in cadmium resistance.

The copZ gene of Bacillus subtilis encodes a copper chaperon CopZ that donates copper to the copper transporter CopA. Both genes copZ and copA are clustered to an operon and its promoter is regulated by Cu ions and CueR, a Mer-like transcriptional activator. Here we show that cadmium ions activate copZA expression as strong as copper ions.