Transcriptome-wide dynamics of RNA pseudouridylation
John Karijolich1, Chengqi Yi2, Yi-Tao Yu3
1Department of Plant and Microbial Biology, University of California, 565 Li Ka Shing Center #3370, Berkeley, California 94720-337, USA.
Pseudouridylation, a key RNA modification, is now mapped across the transcriptome, revealing its role in cellular stress and on messenger RNAs (mRNAs). This discovery expands our understanding of RNA pseudouridylation and its impact on protein complexity.
Area of Science:
- Molecular Biology
- RNA Biology
- Post-transcriptional Modifications
Background:
- Pseudouridylation is the most abundant internal RNA modification.
- It plays crucial roles in spliceosomal small nuclear RNAs (snRNAs) and ribosomal RNAs (rRNAs) biogenesis and function.
- Recent advances have enabled transcriptome-wide mapping of pseudouridylation.
Purpose of the Study:
- To present the first transcriptome-wide maps of RNA pseudouridylation.
- To explore the roles of pseudouridylation in cellular stress response.
- To investigate pseudouridylation of messenger RNAs (mRNAs).
Main Methods:
- Transcriptome-wide mapping techniques.
- Computational analysis of RNA modification data.
- Investigation of pseudouridine synthase targets.
Main Results:
- An expanded catalogue of pseudouridylated RNAs was identified.
- RNA pseudouridylation is implicated in the cellular stress response.
- Messenger RNAs (mRNAs) were identified as targets of pseudouridine synthases.
Conclusions:
- Pseudouridylation is a widespread RNA modification with diverse functional implications.
- Pseudouridylation of mRNAs suggests a novel regulatory mechanism.
- This modification potentially contributes to expanding cellular proteome complexity.
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