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A Nonsequencing Approach for the Rapid Detection of RNA Editing
Published on: April 21, 2022
Transcriptome-wide sequencing reveals numerous APOBEC1 mRNA-editing targets in transcript 3' UTRs
Brad R Rosenberg1, Claire E Hamilton, Michael M Mwangi
1Laboratory of Lymphocyte Biology, The Rockefeller University, New York, New York, USA.
Nature Structural & Molecular Biology
|January 25, 2011
Summary
Apolipoprotein B-editing enzyme, catalytic polypeptide-1 (APOBEC1) edits more than just apoB mRNA. This study identified 32 new mRNA targets, revealing a novel mechanism for modifying transcript 3' untranslated regions.
Area of Science:
- Biochemistry
- Molecular Biology
- Genetics
Background:
- Apolipoprotein B-editing enzyme, catalytic polypeptide-1 (APOBEC1) is a cytidine deaminase.
- APOBEC1 converts cytidine to uridine in apolipoprotein B (apoB) mRNA, producing a truncated apoB isoform for lipid transport.
Purpose of the Study:
- To investigate whether APOBEC1 edits additional mRNAs beyond apoB.
- To identify novel mRNA targets of APOBEC1 and characterize the editing mechanism.
Main Methods:
- Transcriptome-wide comparative RNA sequencing (RNA-Seq) screen.
- Identification and validation of APOBEC1 mRNA editing targets.
- Bioinformatic analysis of sequence features in editing targets.
Main Results:
- Identified and validated 32 previously undescribed mRNA targets of APOBEC1 editing.
- All new targets are located in AU-rich segments of transcript 3' untranslated regions (3' UTRs).
- Established sequence features predictive of APOBEC1 editing targets.
Conclusions:
- APOBEC1 has a broader range of mRNA targets than previously known.
- APOBEC1-mediated RNA editing represents a novel mechanism for transcript 3' UTR modification.
- This study significantly expands the known targets of APOBEC1 and provides insights into RNA editing regulation.
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