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- W1998221098 abstract "We have been able to isolate several species of 5-S ribosomal RNA from Escherichia coli A19. These molecules were separated on the basis of their differing stabilities during electrophoresis on 12% polyacrylamide gels in 7 M urea. This differing stability is shown, in one case, to be due to a different primary sequence. We have determined the sequence of the least stable of these molecules and have found only one difference to the published sequence of E. coli A19 5-S RNA, namely a uridine in place of a cytidine at position 92. The consequent G x U base pair, formed in a normally highly stable G x C-rich region, is responsible for a drastic reduction in the stability of the molecule. This instability leads to a less constrained, more compact molecule which thus migrates faster in electrophoresis under denaturing conditions. This species of 5-S RNA is shown to make up 30% of the total 5-S RNA in the 50-S ribosomal subunits in this organism. Further structural studies were carried out using S1 nuclease digestion, sodium bisulphite modification and thermal melting analysis. All these methods indicate a 5-S RNA drastically destabilized in parts of its secondary and tertiary structure. Finally, the ability of the variant 5-S RNA to recognize and form a complex with its 50-S subunit binding proteins was examined and found to be impaired." @default.
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- W1998221098 date "2005-03-03" @default.
- W1998221098 modified "2023-09-25" @default.
- W1998221098 title "The Effect of a Cytidine-to-Uridine Transition on the Stability of Escherichia coli A19 5-S RNA" @default.
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- W1998221098 doi "https://doi.org/10.1111/j.1432-1033.1982.tb06904.x" @default.
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