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Engineering Artificial Factors to Specifically Manipulate Alternative Splicing in Human Cells
Published on: April 26, 2017
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Global donor and acceptor splicing site kinetics in human cells
Leonhard Wachutka1, Livia Caizzi2, Julien Gagneur1
1Department of Informatics, Technical University of Munich, Garching, Germany.
Elife
|April 27, 2019
Summary
This study quantifies RNA splicing rates in vivo, revealing it takes minutes and depends on RNA polymerase speed. Splicing efficiency is highest for mRNA and encoded in the genome.
Area of Science:
- Molecular Biology
- Genomics
- Biophysics
Background:
- RNA splicing is a critical step in eukaryotic gene expression.
- In vitro studies extensively detail splicing mechanisms, but in vivo kinetics remain unclear.
Purpose of the Study:
- To quantify in vivo RNA splicing rates and efficiency across the human genome.
- To understand factors influencing splicing kinetics and yield.
Main Methods:
- Transient transcriptome sequencing (TT-seq) to measure RNA metabolic rates.
- Mathematical modeling to analyze splicing kinetics and yield.
Main Results:
- In vivo RNA splicing occurs on a minute timescale and is limited by RNA polymerase elongation speed.
- Splicing kinetics are influenced by flanking nucleotide sequences and RNA-snRNA interactions.
- Splicing yield, the conversion efficiency of unspliced to spliced RNA, is highest for mRNA and independent of splicing rate.
Conclusions:
- Developed quantitative models for genome-encoded splicing rates and yield.
- Provided new insights into the in vivo regulation of gene expression through splicing kinetics.
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