Leucine operon leader peptide
This family consists of the leucine operon leader peptide. The leucine operon is involved in the control of the biosynthesis of leucine. Four adjacent leucine codons within the leucine leader RNA are critically important in transcription attenuation-mediated control of leucine operon expression in bacteria. The leader RNA contains translational start and stop signals, a cluster of four leucine codons and overlapping regions of dyad symmetry that are capable of forming stem-and-loop structures.
Jiyao W et al.(2023). "The conserved domain database in 2023.",