title: Rho factor: transcription termination in four steps.
abstract: Rho factor is a hexameric ring-shaped helicase which terminates transcription in Escherichia coli. Two recent crystal structures of Rho in complex with nucleic acid reveal how this helicase ring loads onto mRNA and encircles it.
mesh_terms: D004926:Escherichia coli / Q000235:genetics*; D008954:Models, Biological; D020365:RNA Helicases / Q000737:chemistry / Q000378:metabolism; D012329:RNA, Bacterial / Q000096:biosynthesis / Q000235:genetics; D012234:Rho Factor / Q000737:chemistry / Q000378:metabolism*; D014158:Transcription, Genetic
chemical_list: D012329:RNA, Bacterial; D012234:Rho Factor; D020365:RNA Helicases