Collection of Manually Curated Inferences of Regulons in Prokaryotic Genomes
-- version 4.0 --

Collection of regulogs for Thr_leader (RF00506) RNA regulatory element

The threonine operon leader is an RNA element that was found upstream of some threonine biosynthesis thrABC operons in Escherichia coli and related bacteria and that is involved in the amino acid dependent attenuation of their transcription [6186194]. The leader sequence can assume two different secondary structures known as the terminator and the anti-terminator structure. The leader also codes for very short peptide sequence that is rich in Threonine. The terminator structure is recognized as a termination signal for RNA polymerase and the operon is not transcribed. This structure forms when the cell has an excess of threonine and ribosome movement over the leader transcript is not impeded. more

Phylum Regulog RNA regulons (studied genomes) RNA sites
Proteobacteria Thr_leader - Enterobacteriales 12 (12) 12
Proteobacteria Thr_leader - Pasteurellales 7 (9) 7
Proteobacteria Thr_leader - Shewanellaceae 16 (16) 16
Proteobacteria Thr_leader - Vibrionales 10 (10) 10