{"rfam": {"acc": "RF00140", "id": "Alpha_RBS", "description": "Alpha operon ribosome binding site", "comment": "The bacterial alpha operon ribosome binding site is surrounded by this complex pseudoknotted structure. Translation of the mRNA produces 4 ribosomal protein products, one of which (S4) acts as a translational repressor by binding to the nested pseudoknot region. The mechanism of repression is thought to involve a conformational switch in the pseudoknot region and ribosome entrapment [1].", "curation": {"author": "Griffiths-Jones SR, Moxon SJ", "seed_source": "Griffiths-Jones SR", "num_seed": 39, "num_full": 712, "num_species": 747, "type": "Cis-reg;", "structure_source": "Published; PMID:11504736"}, "cm": {"build_command": "cmbuild -F CM SEED", "calibrate_command": "cmcalibrate --mpi CM", "search_command": "cmsearch --cpu 4 --verbose --nohmmonly -T 19.00 -Z 2958934 CM SEQDB", "cutoffs": {"gathering": 38.0, "trusted": 38.0, "noise": 37.9}}, "release": {"date": "2026-01-16", "number": "15.1"}, "clan": {"acc": null, "id": null}}}