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Updated: Jul 6, 2026
08:53
A Reporter Based Cellular Assay for Monitoring Splicing Efficiency
Published on: September 15, 2021
Coilin levels and modifications influence artificial reporter splicing.
A A Whittom1, H Xu, M D Hebert
1Department of Biochemistry, The University of Mississippi Medical Center, 2500 North State Street, Jackson, MS 39216-4505, USA.
Cellular and Molecular Life Sciences : CMLS
|March 7, 2008
Summary
Altered Cajal body (CB) protein coilin levels and modifications affect spliceosome assembly and splicing efficiency. Hypomethylated coilin enhances splicing, while reduced coilin impairs cell proliferation and splicing.
Area of Science:
- Cell Biology
- Molecular Biology
- Biochemistry
Background:
- Cajal bodies (CBs) and Gems are nuclear bodies crucial for spliceosomal small nuclear ribonucleoprotein (snRNP) biogenesis.
- Coilin is the marker protein for CBs, and canonical CBs also contain the survivor of motor neuron protein (SMN), which can also localize to Gems.
Purpose of the Study:
- To investigate the impact of coilin levels and modifications on splicing efficiency.
- To determine how coilin's role in CBs and Gems influences cellular processes.
Main Methods:
- Utilized various cell lines with altered coilin levels and modifications.
- Assessed splicing efficiency using an artificial reporter substrate.
- Monitored cell proliferation rates.
Main Results:
- Cells with hypomethylated coilin and Gems exhibited enhanced reporter splicing compared to cells where SMN localized to CBs.
- Reduction in coilin levels, leading to Gem formation, decreased both cell proliferation and artificial reporter splicing.
Conclusions:
- Coilin modifications and levels significantly impact artificial reporter splicing efficiency.
- These changes in splicing may be mediated by alterations in snRNP biogenesis within nuclear bodies.
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