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A Rapid High-throughput Method for Mapping Ribonucleoproteins (RNPs) on Human pre-mRNA

A Rapid High-throughput Method for Mapping Ribonucleoproteins (RNPs) on Human pre-mRNA

Published on: December 2, 2009

An efficient method for genome-wide polyadenylation site mapping and RNA quantification.

Stefan Wilkening¹, Vicent Pelechano, Aino I Järvelin

¹Genome Biology Unit, European Molecular Biology Laboratory, Heidelberg, Germany.

Nucleic Acids Research

|January 9, 2013

Summary

We developed 3'T-fill, a new method to identify polyadenylation sites in RNA. This technique accurately quantifies RNA levels and reveals alternative polyadenylation diversity within cell populations.

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Published on: December 2, 2009

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Real-time Analysis of Transcription Factor Binding, Transcription, Translation, and Turnover to Display Global Events During Cellular Activation

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Published on: March 7, 2018

Area of Science:

Molecular Biology
Genomics
RNA Biology

Background:

Alternative polyadenylation (APA) significantly influences mRNA fate, affecting stability, localization, and translation.
Understanding APA is crucial for comprehending gene expression regulation and cellular function.

Purpose of the Study:

To introduce a novel, high-throughput method for genome-wide, strand-specific identification of poly(A) sites.
To characterize the diversity of polyadenylation in Saccharomyces cerevisiae using the new method.
To investigate the genomic constraints on 3'-untranslated region (UTR) overlap.

Main Methods:

Developed 3'T-fill, a method that fills poly(A) stretches with dTTPs for direct sequencing into 3'-untranslated regions (UTRs).
Performed comparative analysis to validate the method's quality, throughput, and accuracy in RNA quantification.
Applied 3'T-fill to analyze polyadenylation patterns in Saccharomyces cerevisiae.

Main Results:

3'T-fill demonstrates superior quality and throughput compared to existing protocols.
The method accurately quantifies RNA levels, producing a single read per transcript.
Analysis in yeast revealed significant alternative RNA molecule diversity within a genetically identical population.
Frequent overlap of convergent 3'-UTRs was observed, but coding regions impose a sharp limitation.

Conclusions:

3'T-fill is an effective tool for comprehensive poly(A) site identification and RNA quantification.
Alternative polyadenylation is a widespread phenomenon, contributing to transcriptomic diversity even in clonal populations.
Genomic architecture, particularly coding regions, plays a critical role in regulating 3'-UTR organization and preventing excessive compression.