Homodimer. CutC-nlpE double mutants show increased copper sensitivity (PubMed:7635807). However, the copper sensitivity phenotype of the mutant was later shown to be due to the loss of MicL sRNA and elevated Lpp levels (PubMed:25030700). Belongs to the CutC family. Was originally thought to be involved in copper homeostasis (PubMed:7635807), however, the copper sensitivity phenotype of the mutant was later shown to be due to the loss of MicL sRNA which leads to elevated Lpp levels (PubMed:25030700). Silent mutations in this protein that disrupt the promoter of micL are copper sensitive.