Members of this protein family, found in the cyanobacteria, are the global nitrogen regulator NtcA. This DNA-binding transcriptional regulator is required for expressing many different ammonia-repressible genes. The consensus NtcA-binding site is G T A N(8)T A C. [Regulatory functions, DNA interactions]
Jiyao W et al.(2023). "The conserved domain database in 2023.",