Synthesis and processing of 5 S rRNA from an rrnB minigene in a plasmid.
A recombinant plasmid containing the promoters, terminators and only the intact 5 S rRNA gene of rrnB is expressed efficiently in Escherichia coli cells. In strains containing a thermolabile RNAase E (rne) full-length transcripts of the rrnB region from the plasmid and a partially processed intermediate product accumulate at non-permissive temperatures. Upon addition of chloramphenicol two additional plasmid-specific RNA molecules appear. They are shorter than the full-length transcripts. These species contain the 3'-end region of the full-length transcripts. Even though the 5' ends of these RNAs were most likely produced by degradative enzymes these 5' ends are not ragged. All these plasmid-specific RNAs are specific substrates for the two endonucleolytic RNA processing enzymes, RNAase E and RNAase III.
D001483:Base Sequence; D002701:Chloramphenicol / Q000494:pharmacology; D004722:Endoribonucleases / Q000378:metabolism; D004926:Escherichia coli / Q000235:genetics; D005786:Gene Expression Regulation; D005798:Genes, Bacterial; D006358:Hot Temperature; D010957:Plasmids; D012335:RNA, Ribosomal / Q000096:biosynthesis*; D006163:Ribonuclease T1 / Q000378:metabolism; D014158:Transcription, Genetic
D012335:RNA, Ribosomal; D002701:Chloramphenicol; D004722:Endoribonucleases; D006163:Ribonuclease T1; C022537:ribonuclease E