Journal: Nucleic Acids Research
Article Title: The RNA ligase RtcB reverses MazF-induced ribosome heterogeneity in Escherichia coli
Figure Lengend Snippet: RtcB re-ligates RNA43 to purified 70S Δ43 ribosomes in vitro . ( A ) Schematic showing the in vitro ribosome repair assay (see text for details). ( B ) RNA43 AgeI used in the assay. Nucleotides changed in helix 45 and the binding site for primers Y12 (gray) and H17 (green) are indicated. ( C ) RT-PCR performed on RNA purified from 70S Δ43 ribosomes incubated in the absence of RtcB and RNA43 AgeI (lane 1), in the presence of either RNA43 AgeI (lane 2) or RtcB (lane 3), or both (lane 4) employing primer pairs specific for the central region of 16S rRNA (S7/X15; panel a), the 3΄end of 16S rRNA (S7/Y12; panel b), and specific for the AU nucleotide change present in 16S AgeI rRNA upon successful ligation (S7/H17; panel c). ( D ) AgeI restriction analysis and ( E ), sequencing of the RT-PCR product obtained with primer pair S7/H17 (shown in C, panel c, lane 4). Sequencing analyses from position 1509–1517 of the 16S rRNA of (a) rrsB , and (b) the RT-PCR product are shown. Nucleotides changed in RNA43 AgeI are underlined.
Article Snippet: For AgeI restriction analysis the isolated RT-PCR product was incubated with 4 units of AgeI-HF (New England Biolabs) for 30 min at 37°C.
Techniques: Purification, In Vitro, Binding Assay, Reverse Transcription Polymerase Chain Reaction, Incubation, Ligation, Sequencing