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FEBS Lett. 2002 Mar 6;514(1):17-25.

Ribosomal RNA pseudouridines and pseudouridine synthases.

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Department of Biochemistry and Molecular Biology, University of Miami School of Medicine, P.O. Box 016129, Miami, FL 33101, USA.

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  • FEBS Lett 2002 Apr 24;517(1-3):287.


Pseudouridines are found in virtually all ribosomal RNAs but their function is unknown. There are four to eight times more pseudouridines in eukaryotes than in eubacteria. Mapping 19 Haloarcula marismortui pseudouridines on the three-dimensional 50S subunit does not show clustering. In bacteria, specific enzymes choose the site of pseudouridine formation. In eukaryotes, and probably also in archaea, selection and modification is done by a guide RNA-protein complex. No unique specific role for ribosomal pseudouridines has been identified. We propose that pseudouridine's function is as a molecular glue to stabilize required RNA conformations that would otherwise be too flexible.

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