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- W2116199447 abstract "Noncoding RNAs must function in the crowded environment of the cell. Previous small-angle x-ray scattering experiments showed that molecular crowders stabilize the structure of the Azoarcus group I ribozyme, allowing the ribozyme to fold at low physiological Mg(2+) concentrations. Here, we used an RNA cleavage assay to show that the PEG and Ficoll crowder molecules increased the biochemical activity of the ribozyme, whereas sucrose did not. Crowding lowered the Mg(2+) threshold at which activity was detected and increased total RNA cleavage at high Mg(2+) concentrations sufficient to fold the RNA in crowded or dilute solution. After correcting for solution viscosity, the observed reaction rate was proportional to the fraction of active ribozyme. We conclude that molecular crowders stabilize the native ribozyme and favor the active structure relative to compact inactive folding intermediates." @default.
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- W2116199447 date "2014-01-01" @default.
- W2116199447 modified "2023-10-13" @default.
- W2116199447 title "Increased Ribozyme Activity in Crowded Solutions" @default.
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- W2116199447 doi "https://doi.org/10.1074/jbc.m113.527861" @default.
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